1 /*--------------------------------------------------------------------
4 * Support for grand unified configuration scheme, including SET
5 * command, configuration file, and command line options.
6 * See src/backend/utils/misc/README for more information.
9 * Copyright (c) 2000-2008, PostgreSQL Global Development Group
10 * Written by Peter Eisentraut <peter_e@gmx.net>.
13 * $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.430 2008/01/14 19:18:53 tgl Exp $
15 *--------------------------------------------------------------------
28 #include "access/gin.h"
29 #include "access/transam.h"
30 #include "access/twophase.h"
31 #include "access/xact.h"
32 #include "catalog/namespace.h"
33 #include "commands/async.h"
34 #include "commands/prepare.h"
35 #include "commands/vacuum.h"
36 #include "commands/variable.h"
37 #include "commands/trigger.h"
39 #include "libpq/auth.h"
40 #include "libpq/pqformat.h"
41 #include "miscadmin.h"
42 #include "optimizer/cost.h"
43 #include "optimizer/geqo.h"
44 #include "optimizer/paths.h"
45 #include "optimizer/planmain.h"
46 #include "parser/gramparse.h"
47 #include "parser/parse_expr.h"
48 #include "parser/parse_relation.h"
49 #include "parser/parse_type.h"
50 #include "parser/scansup.h"
52 #include "postmaster/autovacuum.h"
53 #include "postmaster/bgwriter.h"
54 #include "postmaster/postmaster.h"
55 #include "postmaster/syslogger.h"
56 #include "postmaster/walwriter.h"
57 #include "storage/fd.h"
58 #include "storage/freespace.h"
59 #include "tcop/tcopprot.h"
60 #include "tsearch/ts_cache.h"
61 #include "utils/builtins.h"
62 #include "utils/guc_tables.h"
63 #include "utils/memutils.h"
64 #include "utils/pg_locale.h"
65 #include "utils/plancache.h"
66 #include "utils/portal.h"
67 #include "utils/ps_status.h"
68 #include "utils/tzparser.h"
69 #include "utils/xml.h"
72 #define PG_KRB_SRVTAB ""
75 #define PG_KRB_SRVNAM ""
78 #define CONFIG_FILENAME "postgresql.conf"
79 #define HBA_FILENAME "pg_hba.conf"
80 #define IDENT_FILENAME "pg_ident.conf"
83 #define CONFIG_EXEC_PARAMS "global/config_exec_params"
84 #define CONFIG_EXEC_PARAMS_NEW "global/config_exec_params.new"
87 /* upper limit for GUC variables measured in kilobytes of memory */
89 #define MAX_KILOBYTES INT_MAX
91 #define MAX_KILOBYTES (INT_MAX / 1024)
94 #define KB_PER_MB (1024)
95 #define KB_PER_GB (1024*1024)
99 #define MS_PER_MIN (1000 * 60)
101 #define S_PER_H (60 * 60)
102 #define MS_PER_H (1000 * 60 * 60)
103 #define MIN_PER_D (60 * 24)
104 #define S_PER_D (60 * 60 * 24)
105 #define MS_PER_D (1000 * 60 * 60 * 24)
107 /* XXX these should appear in other modules' header files */
108 extern bool Log_disconnections;
109 extern int CommitDelay;
110 extern int CommitSiblings;
111 extern char *default_tablespace;
112 extern char *temp_tablespaces;
113 extern bool fullPageWrites;
116 extern bool trace_sort;
118 #ifdef TRACE_SYNCSCAN
119 extern bool trace_syncscan;
121 #ifdef DEBUG_BOUNDED_SORT
122 extern bool optimize_bounded_sort;
126 extern char *SSLCipherSuites;
130 static const char *assign_log_destination(const char *value,
131 bool doit, GucSource source);
134 static int syslog_facility = LOG_LOCAL0;
136 static const char *assign_syslog_facility(const char *facility,
137 bool doit, GucSource source);
138 static const char *assign_syslog_ident(const char *ident,
139 bool doit, GucSource source);
142 static const char *assign_defaultxactisolevel(const char *newval, bool doit,
144 static const char *assign_session_replication_role(const char *newval, bool doit,
146 static const char *assign_log_min_messages(const char *newval, bool doit,
148 static const char *assign_client_min_messages(const char *newval,
149 bool doit, GucSource source);
150 static const char *assign_min_error_statement(const char *newval, bool doit,
152 static const char *assign_msglvl(int *var, const char *newval, bool doit,
154 static const char *assign_log_error_verbosity(const char *newval, bool doit,
156 static const char *assign_log_statement(const char *newval, bool doit,
158 static const char *show_num_temp_buffers(void);
159 static bool assign_phony_autocommit(bool newval, bool doit, GucSource source);
160 static const char *assign_custom_variable_classes(const char *newval, bool doit,
162 static bool assign_debug_assertions(bool newval, bool doit, GucSource source);
163 static bool assign_ssl(bool newval, bool doit, GucSource source);
164 static bool assign_stage_log_stats(bool newval, bool doit, GucSource source);
165 static bool assign_log_stats(bool newval, bool doit, GucSource source);
166 static bool assign_transaction_read_only(bool newval, bool doit, GucSource source);
167 static const char *assign_canonical_path(const char *newval, bool doit, GucSource source);
168 static const char *assign_backslash_quote(const char *newval, bool doit, GucSource source);
169 static const char *assign_timezone_abbreviations(const char *newval, bool doit, GucSource source);
170 static const char *assign_xmlbinary(const char *newval, bool doit, GucSource source);
171 static const char *assign_xmloption(const char *newval, bool doit, GucSource source);
172 static const char *show_archive_command(void);
173 static bool assign_tcp_keepalives_idle(int newval, bool doit, GucSource source);
174 static bool assign_tcp_keepalives_interval(int newval, bool doit, GucSource source);
175 static bool assign_tcp_keepalives_count(int newval, bool doit, GucSource source);
176 static const char *show_tcp_keepalives_idle(void);
177 static const char *show_tcp_keepalives_interval(void);
178 static const char *show_tcp_keepalives_count(void);
179 static bool assign_autovacuum_max_workers(int newval, bool doit, GucSource source);
180 static bool assign_maxconnections(int newval, bool doit, GucSource source);
183 * GUC option variables that are exported from this module
185 #ifdef USE_ASSERT_CHECKING
186 bool assert_enabled = true;
188 bool assert_enabled = false;
190 bool log_duration = false;
191 bool Debug_print_plan = false;
192 bool Debug_print_parse = false;
193 bool Debug_print_rewritten = false;
194 bool Debug_pretty_print = false;
195 bool Explain_pretty_print = true;
197 bool log_parser_stats = false;
198 bool log_planner_stats = false;
199 bool log_executor_stats = false;
200 bool log_statement_stats = false; /* this is sort of all three
202 bool log_btree_build_stats = false;
204 bool check_function_bodies = true;
205 bool default_with_oids = false;
206 bool SQL_inheritance = true;
208 bool Password_encryption = true;
210 int log_min_error_statement = ERROR;
211 int log_min_messages = NOTICE;
212 int client_min_messages = NOTICE;
213 int log_min_duration_statement = -1;
214 int log_temp_files = -1;
216 int num_temp_buffers = 1000;
218 char *ConfigFileName;
221 char *external_pid_file;
223 int tcp_keepalives_idle;
224 int tcp_keepalives_interval;
225 int tcp_keepalives_count;
228 * These variables are all dummies that don't do anything, except in some
229 * cases provide the value for SHOW to display. The real state is elsewhere
230 * and is kept in sync by assign_hooks.
232 static char *client_min_messages_str;
233 static char *log_min_messages_str;
234 static char *log_error_verbosity_str;
235 static char *log_statement_str;
236 static char *log_min_error_statement_str;
237 static char *log_destination_string;
240 static char *syslog_facility_str;
241 static char *syslog_ident_str;
243 static bool phony_autocommit;
244 static bool session_auth_is_superuser;
245 static double phony_random_seed;
246 static char *backslash_quote_string;
247 static char *client_encoding_string;
248 static char *datestyle_string;
249 static char *default_iso_level_string;
250 static char *session_replication_role_string;
251 static char *locale_collate;
252 static char *locale_ctype;
253 static char *regex_flavor_string;
254 static char *server_encoding_string;
255 static char *server_version_string;
256 static int server_version_num;
257 static char *timezone_string;
258 static char *log_timezone_string;
259 static char *timezone_abbreviations_string;
260 static char *XactIsoLevel_string;
261 static char *data_directory;
262 static char *custom_variable_classes;
263 static char *xmlbinary_string;
264 static char *xmloption_string;
265 static int max_function_args;
266 static int max_index_keys;
267 static int max_identifier_length;
268 static int block_size;
269 static bool integer_datetimes;
271 /* should be static, but commands/variable.c needs to get at these */
273 char *session_authorization_string;
277 * Displayable names for context types (enum GucContext)
279 * Note: these strings are deliberately not localized.
281 const char *const GucContext_Names[] =
283 /* PGC_INTERNAL */ "internal",
284 /* PGC_POSTMASTER */ "postmaster",
285 /* PGC_SIGHUP */ "sighup",
286 /* PGC_BACKEND */ "backend",
287 /* PGC_SUSET */ "superuser",
288 /* PGC_USERSET */ "user"
292 * Displayable names for source types (enum GucSource)
294 * Note: these strings are deliberately not localized.
296 const char *const GucSource_Names[] =
298 /* PGC_S_DEFAULT */ "default",
299 /* PGC_S_ENV_VAR */ "environment variable",
300 /* PGC_S_FILE */ "configuration file",
301 /* PGC_S_ARGV */ "command line",
302 /* PGC_S_DATABASE */ "database",
303 /* PGC_S_USER */ "user",
304 /* PGC_S_CLIENT */ "client",
305 /* PGC_S_OVERRIDE */ "override",
306 /* PGC_S_INTERACTIVE */ "interactive",
307 /* PGC_S_TEST */ "test",
308 /* PGC_S_SESSION */ "session"
312 * Displayable names for the groupings defined in enum config_group
314 const char *const config_group_names[] =
317 gettext_noop("Ungrouped"),
319 gettext_noop("File Locations"),
321 gettext_noop("Connections and Authentication"),
322 /* CONN_AUTH_SETTINGS */
323 gettext_noop("Connections and Authentication / Connection Settings"),
324 /* CONN_AUTH_SECURITY */
325 gettext_noop("Connections and Authentication / Security and Authentication"),
327 gettext_noop("Resource Usage"),
329 gettext_noop("Resource Usage / Memory"),
331 gettext_noop("Resource Usage / Free Space Map"),
332 /* RESOURCES_KERNEL */
333 gettext_noop("Resource Usage / Kernel Resources"),
335 gettext_noop("Write-Ahead Log"),
337 gettext_noop("Write-Ahead Log / Settings"),
338 /* WAL_CHECKPOINTS */
339 gettext_noop("Write-Ahead Log / Checkpoints"),
341 gettext_noop("Query Tuning"),
342 /* QUERY_TUNING_METHOD */
343 gettext_noop("Query Tuning / Planner Method Configuration"),
344 /* QUERY_TUNING_COST */
345 gettext_noop("Query Tuning / Planner Cost Constants"),
346 /* QUERY_TUNING_GEQO */
347 gettext_noop("Query Tuning / Genetic Query Optimizer"),
348 /* QUERY_TUNING_OTHER */
349 gettext_noop("Query Tuning / Other Planner Options"),
351 gettext_noop("Reporting and Logging"),
353 gettext_noop("Reporting and Logging / Where to Log"),
355 gettext_noop("Reporting and Logging / When to Log"),
357 gettext_noop("Reporting and Logging / What to Log"),
359 gettext_noop("Statistics"),
360 /* STATS_MONITORING */
361 gettext_noop("Statistics / Monitoring"),
362 /* STATS_COLLECTOR */
363 gettext_noop("Statistics / Query and Index Statistics Collector"),
365 gettext_noop("Autovacuum"),
367 gettext_noop("Client Connection Defaults"),
368 /* CLIENT_CONN_STATEMENT */
369 gettext_noop("Client Connection Defaults / Statement Behavior"),
370 /* CLIENT_CONN_LOCALE */
371 gettext_noop("Client Connection Defaults / Locale and Formatting"),
372 /* CLIENT_CONN_OTHER */
373 gettext_noop("Client Connection Defaults / Other Defaults"),
374 /* LOCK_MANAGEMENT */
375 gettext_noop("Lock Management"),
377 gettext_noop("Version and Platform Compatibility"),
378 /* COMPAT_OPTIONS_PREVIOUS */
379 gettext_noop("Version and Platform Compatibility / Previous PostgreSQL Versions"),
380 /* COMPAT_OPTIONS_CLIENT */
381 gettext_noop("Version and Platform Compatibility / Other Platforms and Clients"),
383 gettext_noop("Preset Options"),
385 gettext_noop("Customized Options"),
386 /* DEVELOPER_OPTIONS */
387 gettext_noop("Developer Options"),
388 /* help_config wants this array to be null-terminated */
393 * Displayable names for GUC variable types (enum config_type)
395 * Note: these strings are deliberately not localized.
397 const char *const config_type_names[] =
399 /* PGC_BOOL */ "bool",
400 /* PGC_INT */ "integer",
401 /* PGC_REAL */ "real",
402 /* PGC_STRING */ "string"
407 * Contents of GUC tables
409 * See src/backend/utils/misc/README for design notes.
413 * 1. Declare a global variable of type bool, int, double, or char*
414 * and make use of it.
416 * 2. Decide at what times it's safe to set the option. See guc.h for
419 * 3. Decide on a name, a default value, upper and lower bounds (if
422 * 4. Add a record below.
424 * 5. Add it to src/backend/utils/misc/postgresql.conf.sample, if
427 * 6. Don't forget to document the option (at least in config.sgml).
429 * 7. If it's a new GUC_LIST option you must edit pg_dumpall.c to ensure
430 * it is not single quoted at dump time.
434 /******** option records follow ********/
436 static struct config_bool ConfigureNamesBool[] =
439 {"enable_seqscan", PGC_USERSET, QUERY_TUNING_METHOD,
440 gettext_noop("Enables the planner's use of sequential-scan plans."),
447 {"enable_indexscan", PGC_USERSET, QUERY_TUNING_METHOD,
448 gettext_noop("Enables the planner's use of index-scan plans."),
455 {"enable_bitmapscan", PGC_USERSET, QUERY_TUNING_METHOD,
456 gettext_noop("Enables the planner's use of bitmap-scan plans."),
463 {"enable_tidscan", PGC_USERSET, QUERY_TUNING_METHOD,
464 gettext_noop("Enables the planner's use of TID scan plans."),
471 {"enable_sort", PGC_USERSET, QUERY_TUNING_METHOD,
472 gettext_noop("Enables the planner's use of explicit sort steps."),
479 {"enable_hashagg", PGC_USERSET, QUERY_TUNING_METHOD,
480 gettext_noop("Enables the planner's use of hashed aggregation plans."),
487 {"enable_nestloop", PGC_USERSET, QUERY_TUNING_METHOD,
488 gettext_noop("Enables the planner's use of nested-loop join plans."),
495 {"enable_mergejoin", PGC_USERSET, QUERY_TUNING_METHOD,
496 gettext_noop("Enables the planner's use of merge join plans."),
503 {"enable_hashjoin", PGC_USERSET, QUERY_TUNING_METHOD,
504 gettext_noop("Enables the planner's use of hash join plans."),
511 {"constraint_exclusion", PGC_USERSET, QUERY_TUNING_OTHER,
512 gettext_noop("Enables the planner to use constraints to optimize queries."),
513 gettext_noop("Child table scans will be skipped if their "
514 "constraints guarantee that no rows match the query.")
516 &constraint_exclusion,
520 {"geqo", PGC_USERSET, QUERY_TUNING_GEQO,
521 gettext_noop("Enables genetic query optimization."),
522 gettext_noop("This algorithm attempts to do planning without "
523 "exhaustive searching.")
529 /* Not for general use --- used by SET SESSION AUTHORIZATION */
530 {"is_superuser", PGC_INTERNAL, UNGROUPED,
531 gettext_noop("Shows whether the current user is a superuser."),
533 GUC_REPORT | GUC_NO_SHOW_ALL | GUC_NO_RESET_ALL | GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
535 &session_auth_is_superuser,
539 {"ssl", PGC_POSTMASTER, CONN_AUTH_SECURITY,
540 gettext_noop("Enables SSL connections."),
544 false, assign_ssl, NULL
547 {"fsync", PGC_SIGHUP, WAL_SETTINGS,
548 gettext_noop("Forces synchronization of updates to disk."),
549 gettext_noop("The server will use the fsync() system call in several places to make "
550 "sure that updates are physically written to disk. This insures "
551 "that a database cluster will recover to a consistent state after "
552 "an operating system or hardware crash.")
558 {"synchronous_commit", PGC_USERSET, WAL_SETTINGS,
559 gettext_noop("Sets immediate fsync at commit."),
566 {"zero_damaged_pages", PGC_SUSET, DEVELOPER_OPTIONS,
567 gettext_noop("Continues processing past damaged page headers."),
568 gettext_noop("Detection of a damaged page header normally causes PostgreSQL to "
569 "report an error, aborting the current transaction. Setting "
570 "zero_damaged_pages to true causes the system to instead report a "
571 "warning, zero out the damaged page, and continue processing. This "
572 "behavior will destroy data, namely all the rows on the damaged page."),
579 {"full_page_writes", PGC_SIGHUP, WAL_SETTINGS,
580 gettext_noop("Writes full pages to WAL when first modified after a checkpoint."),
581 gettext_noop("A page write in process during an operating system crash might be "
582 "only partially written to disk. During recovery, the row changes "
583 "stored in WAL are not enough to recover. This option writes "
584 "pages when first modified after a checkpoint to WAL so full recovery "
591 {"silent_mode", PGC_POSTMASTER, LOGGING_WHEN,
592 gettext_noop("Runs the server silently."),
593 gettext_noop("If this parameter is set, the server will automatically run in the "
594 "background and any controlling terminals are dissociated.")
600 {"log_checkpoints", PGC_SIGHUP, LOGGING_WHAT,
601 gettext_noop("Logs each checkpoint."),
608 {"log_connections", PGC_BACKEND, LOGGING_WHAT,
609 gettext_noop("Logs each successful connection."),
616 {"log_disconnections", PGC_BACKEND, LOGGING_WHAT,
617 gettext_noop("Logs end of a session, including duration."),
624 {"debug_assertions", PGC_USERSET, DEVELOPER_OPTIONS,
625 gettext_noop("Turns on various assertion checks."),
626 gettext_noop("This is a debugging aid."),
630 #ifdef USE_ASSERT_CHECKING
635 assign_debug_assertions, NULL
638 /* currently undocumented, so don't show in SHOW ALL */
639 {"exit_on_error", PGC_USERSET, UNGROUPED,
640 gettext_noop("No description available."),
642 GUC_NO_SHOW_ALL | GUC_NOT_IN_SAMPLE
648 {"log_duration", PGC_SUSET, LOGGING_WHAT,
649 gettext_noop("Logs the duration of each completed SQL statement."),
656 {"debug_print_parse", PGC_USERSET, LOGGING_WHAT,
657 gettext_noop("Prints the parse tree to the server log."),
664 {"debug_print_rewritten", PGC_USERSET, LOGGING_WHAT,
665 gettext_noop("Prints the parse tree after rewriting to server log."),
668 &Debug_print_rewritten,
672 {"debug_print_plan", PGC_USERSET, LOGGING_WHAT,
673 gettext_noop("Prints the execution plan to server log."),
680 {"debug_pretty_print", PGC_USERSET, LOGGING_WHAT,
681 gettext_noop("Indents parse and plan tree displays."),
688 {"log_parser_stats", PGC_SUSET, STATS_MONITORING,
689 gettext_noop("Writes parser performance statistics to the server log."),
693 false, assign_stage_log_stats, NULL
696 {"log_planner_stats", PGC_SUSET, STATS_MONITORING,
697 gettext_noop("Writes planner performance statistics to the server log."),
701 false, assign_stage_log_stats, NULL
704 {"log_executor_stats", PGC_SUSET, STATS_MONITORING,
705 gettext_noop("Writes executor performance statistics to the server log."),
709 false, assign_stage_log_stats, NULL
712 {"log_statement_stats", PGC_SUSET, STATS_MONITORING,
713 gettext_noop("Writes cumulative performance statistics to the server log."),
716 &log_statement_stats,
717 false, assign_log_stats, NULL
719 #ifdef BTREE_BUILD_STATS
721 {"log_btree_build_stats", PGC_SUSET, DEVELOPER_OPTIONS,
722 gettext_noop("No description available."),
726 &log_btree_build_stats,
732 {"explain_pretty_print", PGC_USERSET, CLIENT_CONN_OTHER,
733 gettext_noop("Uses the indented output format for EXPLAIN VERBOSE."),
736 &Explain_pretty_print,
741 {"track_activities", PGC_SUSET, STATS_COLLECTOR,
742 gettext_noop("Collects information about executing commands."),
743 gettext_noop("Enables the collection of information on the currently "
744 "executing command of each session, along with "
745 "the time at which that command began execution.")
747 &pgstat_track_activities,
751 {"track_counts", PGC_SUSET, STATS_COLLECTOR,
752 gettext_noop("Collects statistics on database activity."),
755 &pgstat_track_counts,
760 {"update_process_title", PGC_SUSET, STATS_COLLECTOR,
761 gettext_noop("Updates the process title to show the active SQL command."),
762 gettext_noop("Enables updating of the process title every time a new SQL command is received by the server.")
764 &update_process_title,
769 {"autovacuum", PGC_SIGHUP, AUTOVACUUM,
770 gettext_noop("Starts the autovacuum subprocess."),
773 &autovacuum_start_daemon,
778 {"trace_notify", PGC_USERSET, DEVELOPER_OPTIONS,
779 gettext_noop("Generates debugging output for LISTEN and NOTIFY."),
789 {"trace_locks", PGC_SUSET, DEVELOPER_OPTIONS,
790 gettext_noop("No description available."),
798 {"trace_userlocks", PGC_SUSET, DEVELOPER_OPTIONS,
799 gettext_noop("No description available."),
807 {"trace_lwlocks", PGC_SUSET, DEVELOPER_OPTIONS,
808 gettext_noop("No description available."),
816 {"debug_deadlocks", PGC_SUSET, DEVELOPER_OPTIONS,
817 gettext_noop("No description available."),
827 {"log_lock_waits", PGC_SUSET, LOGGING_WHAT,
828 gettext_noop("Logs long lock waits."),
836 {"log_hostname", PGC_SIGHUP, LOGGING_WHAT,
837 gettext_noop("Logs the host name in the connection logs."),
838 gettext_noop("By default, connection logs only show the IP address "
839 "of the connecting host. If you want them to show the host name you "
840 "can turn this on, but depending on your host name resolution "
841 "setup it might impose a non-negligible performance penalty.")
847 {"sql_inheritance", PGC_USERSET, COMPAT_OPTIONS_PREVIOUS,
848 gettext_noop("Causes subtables to be included by default in various commands."),
855 {"password_encryption", PGC_USERSET, CONN_AUTH_SECURITY,
856 gettext_noop("Encrypt passwords."),
857 gettext_noop("When a password is specified in CREATE USER or "
858 "ALTER USER without writing either ENCRYPTED or UNENCRYPTED, "
859 "this parameter determines whether the password is to be encrypted.")
861 &Password_encryption,
865 {"transform_null_equals", PGC_USERSET, COMPAT_OPTIONS_CLIENT,
866 gettext_noop("Treats \"expr=NULL\" as \"expr IS NULL\"."),
867 gettext_noop("When turned on, expressions of the form expr = NULL "
868 "(or NULL = expr) are treated as expr IS NULL, that is, they "
869 "return true if expr evaluates to the null value, and false "
870 "otherwise. The correct behavior of expr = NULL is to always "
871 "return null (unknown).")
873 &Transform_null_equals,
877 {"db_user_namespace", PGC_SIGHUP, CONN_AUTH_SECURITY,
878 gettext_noop("Enables per-database user names."),
885 /* only here for backwards compatibility */
886 {"autocommit", PGC_USERSET, CLIENT_CONN_STATEMENT,
887 gettext_noop("This parameter doesn't do anything."),
888 gettext_noop("It's just here so that we won't choke on SET AUTOCOMMIT TO ON from 7.3-vintage clients."),
889 GUC_NO_SHOW_ALL | GUC_NOT_IN_SAMPLE
892 true, assign_phony_autocommit, NULL
895 {"default_transaction_read_only", PGC_USERSET, CLIENT_CONN_STATEMENT,
896 gettext_noop("Sets the default read-only status of new transactions."),
899 &DefaultXactReadOnly,
903 {"transaction_read_only", PGC_USERSET, CLIENT_CONN_STATEMENT,
904 gettext_noop("Sets the current transaction's read-only status."),
906 GUC_NO_RESET_ALL | GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
909 false, assign_transaction_read_only, NULL
912 {"add_missing_from", PGC_USERSET, COMPAT_OPTIONS_PREVIOUS,
913 gettext_noop("Automatically adds missing table references to FROM clauses."),
920 {"check_function_bodies", PGC_USERSET, CLIENT_CONN_STATEMENT,
921 gettext_noop("Check function bodies during CREATE FUNCTION."),
924 &check_function_bodies,
928 {"array_nulls", PGC_USERSET, COMPAT_OPTIONS_PREVIOUS,
929 gettext_noop("Enable input of NULL elements in arrays."),
930 gettext_noop("When turned on, unquoted NULL in an array input "
931 "value means a null value; "
932 "otherwise it is taken literally.")
938 {"default_with_oids", PGC_USERSET, COMPAT_OPTIONS_PREVIOUS,
939 gettext_noop("Create new tables with OIDs by default."),
946 {"logging_collector", PGC_POSTMASTER, LOGGING_WHERE,
947 gettext_noop("Start a subprocess to capture stderr output and/or csvlogs into log files."),
954 {"log_truncate_on_rotation", PGC_SIGHUP, LOGGING_WHERE,
955 gettext_noop("Truncate existing log files of same name during log rotation."),
958 &Log_truncate_on_rotation,
964 {"trace_sort", PGC_USERSET, DEVELOPER_OPTIONS,
965 gettext_noop("Emit information about resource usage in sorting."),
974 #ifdef TRACE_SYNCSCAN
975 /* this is undocumented because not exposed in a standard build */
977 {"trace_syncscan", PGC_USERSET, DEVELOPER_OPTIONS,
978 gettext_noop("Generate debugging output for synchronized scanning."),
987 #ifdef DEBUG_BOUNDED_SORT
988 /* this is undocumented because not exposed in a standard build */
991 "optimize_bounded_sort", PGC_USERSET, QUERY_TUNING_METHOD,
992 gettext_noop("Enable bounded sorting using heap sort."),
996 &optimize_bounded_sort,
1003 {"wal_debug", PGC_SUSET, DEVELOPER_OPTIONS,
1004 gettext_noop("Emit WAL-related debugging output."),
1014 {"integer_datetimes", PGC_INTERNAL, PRESET_OPTIONS,
1015 gettext_noop("Datetimes are integer based."),
1017 GUC_REPORT | GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
1020 #ifdef HAVE_INT64_TIMESTAMP
1028 {"krb_caseins_users", PGC_POSTMASTER, CONN_AUTH_SECURITY,
1029 gettext_noop("Sets whether Kerberos and GSSAPI user names should be treated as case-insensitive."),
1032 &pg_krb_caseins_users,
1037 {"escape_string_warning", PGC_USERSET, COMPAT_OPTIONS_PREVIOUS,
1038 gettext_noop("Warn about backslash escapes in ordinary string literals."),
1041 &escape_string_warning,
1046 {"standard_conforming_strings", PGC_USERSET, COMPAT_OPTIONS_PREVIOUS,
1047 gettext_noop("Causes '...' strings to treat backslashes literally."),
1051 &standard_conforming_strings,
1056 {"archive_mode", PGC_POSTMASTER, WAL_SETTINGS,
1057 gettext_noop("Allows archiving of WAL files using archive_command."),
1065 {"allow_system_table_mods", PGC_POSTMASTER, DEVELOPER_OPTIONS,
1066 gettext_noop("Allows modifications of the structure of system tables."),
1070 &allowSystemTableMods,
1075 {"ignore_system_indexes", PGC_BACKEND, DEVELOPER_OPTIONS,
1076 gettext_noop("Disables reading from system indexes."),
1077 gettext_noop("It does not prevent updating the indexes, so it is safe "
1078 "to use. The worst consequence is slowness."),
1081 &IgnoreSystemIndexes,
1085 /* End-of-list marker */
1087 {NULL, 0, 0, NULL, NULL}, NULL, false, NULL, NULL
1092 static struct config_int ConfigureNamesInt[] =
1095 {"archive_timeout", PGC_SIGHUP, WAL_SETTINGS,
1096 gettext_noop("Forces a switch to the next xlog file if a "
1097 "new file has not been started within N seconds."),
1101 &XLogArchiveTimeout,
1102 0, 0, INT_MAX, NULL, NULL
1105 {"post_auth_delay", PGC_BACKEND, DEVELOPER_OPTIONS,
1106 gettext_noop("Waits N seconds on connection startup after authentication."),
1107 gettext_noop("This allows attaching a debugger to the process."),
1108 GUC_NOT_IN_SAMPLE | GUC_UNIT_S
1111 0, 0, INT_MAX, NULL, NULL
1114 {"default_statistics_target", PGC_USERSET, QUERY_TUNING_OTHER,
1115 gettext_noop("Sets the default statistics target."),
1116 gettext_noop("This applies to table columns that have not had a "
1117 "column-specific target set via ALTER TABLE SET STATISTICS.")
1119 &default_statistics_target,
1120 10, 1, 1000, NULL, NULL
1123 {"from_collapse_limit", PGC_USERSET, QUERY_TUNING_OTHER,
1124 gettext_noop("Sets the FROM-list size beyond which subqueries "
1125 "are not collapsed."),
1126 gettext_noop("The planner will merge subqueries into upper "
1127 "queries if the resulting FROM list would have no more than "
1130 &from_collapse_limit,
1131 8, 1, INT_MAX, NULL, NULL
1134 {"join_collapse_limit", PGC_USERSET, QUERY_TUNING_OTHER,
1135 gettext_noop("Sets the FROM-list size beyond which JOIN "
1136 "constructs are not flattened."),
1137 gettext_noop("The planner will flatten explicit JOIN "
1138 "constructs into lists of FROM items whenever a "
1139 "list of no more than this many items would result.")
1141 &join_collapse_limit,
1142 8, 1, INT_MAX, NULL, NULL
1145 {"geqo_threshold", PGC_USERSET, QUERY_TUNING_GEQO,
1146 gettext_noop("Sets the threshold of FROM items beyond which GEQO is used."),
1150 12, 2, INT_MAX, NULL, NULL
1153 {"geqo_effort", PGC_USERSET, QUERY_TUNING_GEQO,
1154 gettext_noop("GEQO: effort is used to set the default for other GEQO parameters."),
1158 DEFAULT_GEQO_EFFORT, MIN_GEQO_EFFORT, MAX_GEQO_EFFORT, NULL, NULL
1161 {"geqo_pool_size", PGC_USERSET, QUERY_TUNING_GEQO,
1162 gettext_noop("GEQO: number of individuals in the population."),
1163 gettext_noop("Zero selects a suitable default value.")
1166 0, 0, INT_MAX, NULL, NULL
1169 {"geqo_generations", PGC_USERSET, QUERY_TUNING_GEQO,
1170 gettext_noop("GEQO: number of iterations of the algorithm."),
1171 gettext_noop("Zero selects a suitable default value.")
1174 0, 0, INT_MAX, NULL, NULL
1178 {"deadlock_timeout", PGC_SIGHUP, LOCK_MANAGEMENT,
1179 gettext_noop("Sets the time to wait on a lock before checking for deadlock."),
1184 1000, 1, INT_MAX / 1000, NULL, NULL
1188 * Note: There is some postprocessing done in PostmasterMain() to make
1189 * sure the buffers are at least twice the number of backends, so the
1190 * constraints here are partially unused. Similarly, the superuser
1191 * reserved number is checked to ensure it is less than the max backends
1194 * MaxBackends is limited to INT_MAX/4 because some places compute
1195 * 4*MaxBackends without any overflow check. This check is made on
1196 * assign_maxconnections, since MaxBackends is computed as MaxConnections
1197 * + autovacuum_max_workers.
1199 * Likewise we have to limit NBuffers to INT_MAX/2.
1202 {"max_connections", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
1203 gettext_noop("Sets the maximum number of concurrent connections."),
1207 100, 1, INT_MAX / 4, assign_maxconnections, NULL
1211 {"superuser_reserved_connections", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
1212 gettext_noop("Sets the number of connection slots reserved for superusers."),
1216 3, 0, INT_MAX / 4, NULL, NULL
1220 {"shared_buffers", PGC_POSTMASTER, RESOURCES_MEM,
1221 gettext_noop("Sets the number of shared memory buffers used by the server."),
1226 1024, 16, INT_MAX / 2, NULL, NULL
1230 {"temp_buffers", PGC_USERSET, RESOURCES_MEM,
1231 gettext_noop("Sets the maximum number of temporary buffers used by each session."),
1236 1024, 100, INT_MAX / 2, NULL, show_num_temp_buffers
1240 {"port", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
1241 gettext_noop("Sets the TCP port the server listens on."),
1245 DEF_PGPORT, 1, 65535, NULL, NULL
1249 {"unix_socket_permissions", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
1250 gettext_noop("Sets the access permissions of the Unix-domain socket."),
1251 gettext_noop("Unix-domain sockets use the usual Unix file system "
1252 "permission set. The parameter value is expected to be an numeric mode "
1253 "specification in the form accepted by the chmod and umask system "
1254 "calls. (To use the customary octal format the number must start with "
1257 &Unix_socket_permissions,
1258 0777, 0000, 0777, NULL, NULL
1262 {"work_mem", PGC_USERSET, RESOURCES_MEM,
1263 gettext_noop("Sets the maximum memory to be used for query workspaces."),
1264 gettext_noop("This much memory can be used by each internal "
1265 "sort operation and hash table before switching to "
1266 "temporary disk files."),
1270 1024, 8 * BLCKSZ / 1024, MAX_KILOBYTES, NULL, NULL
1274 {"maintenance_work_mem", PGC_USERSET, RESOURCES_MEM,
1275 gettext_noop("Sets the maximum memory to be used for maintenance operations."),
1276 gettext_noop("This includes operations such as VACUUM and CREATE INDEX."),
1279 &maintenance_work_mem,
1280 16384, 1024, MAX_KILOBYTES, NULL, NULL
1284 {"max_stack_depth", PGC_SUSET, RESOURCES_MEM,
1285 gettext_noop("Sets the maximum stack depth, in kilobytes."),
1290 100, 100, MAX_KILOBYTES, assign_max_stack_depth, NULL
1294 {"vacuum_cost_page_hit", PGC_USERSET, RESOURCES,
1295 gettext_noop("Vacuum cost for a page found in the buffer cache."),
1299 1, 0, 10000, NULL, NULL
1303 {"vacuum_cost_page_miss", PGC_USERSET, RESOURCES,
1304 gettext_noop("Vacuum cost for a page not found in the buffer cache."),
1307 &VacuumCostPageMiss,
1308 10, 0, 10000, NULL, NULL
1312 {"vacuum_cost_page_dirty", PGC_USERSET, RESOURCES,
1313 gettext_noop("Vacuum cost for a page dirtied by vacuum."),
1316 &VacuumCostPageDirty,
1317 20, 0, 10000, NULL, NULL
1321 {"vacuum_cost_limit", PGC_USERSET, RESOURCES,
1322 gettext_noop("Vacuum cost amount available before napping."),
1326 200, 1, 10000, NULL, NULL
1330 {"vacuum_cost_delay", PGC_USERSET, RESOURCES,
1331 gettext_noop("Vacuum cost delay in milliseconds."),
1336 0, 0, 1000, NULL, NULL
1340 {"autovacuum_vacuum_cost_delay", PGC_SIGHUP, AUTOVACUUM,
1341 gettext_noop("Vacuum cost delay in milliseconds, for autovacuum."),
1345 &autovacuum_vac_cost_delay,
1346 20, -1, 1000, NULL, NULL
1350 {"autovacuum_vacuum_cost_limit", PGC_SIGHUP, AUTOVACUUM,
1351 gettext_noop("Vacuum cost amount available before napping, for autovacuum."),
1354 &autovacuum_vac_cost_limit,
1355 -1, -1, 10000, NULL, NULL
1359 {"max_files_per_process", PGC_POSTMASTER, RESOURCES_KERNEL,
1360 gettext_noop("Sets the maximum number of simultaneously open files for each server process."),
1363 &max_files_per_process,
1364 1000, 25, INT_MAX, NULL, NULL
1368 {"max_prepared_transactions", PGC_POSTMASTER, RESOURCES,
1369 gettext_noop("Sets the maximum number of simultaneously prepared transactions."),
1372 &max_prepared_xacts,
1373 5, 0, INT_MAX, NULL, NULL
1378 {"trace_lock_oidmin", PGC_SUSET, DEVELOPER_OPTIONS,
1379 gettext_noop("No description available."),
1384 FirstNormalObjectId, 0, INT_MAX, NULL, NULL
1387 {"trace_lock_table", PGC_SUSET, DEVELOPER_OPTIONS,
1388 gettext_noop("No description available."),
1393 0, 0, INT_MAX, NULL, NULL
1398 {"statement_timeout", PGC_USERSET, CLIENT_CONN_STATEMENT,
1399 gettext_noop("Sets the maximum allowed duration of any statement."),
1400 gettext_noop("A value of 0 turns off the timeout."),
1404 0, 0, INT_MAX, NULL, NULL
1408 {"vacuum_freeze_min_age", PGC_USERSET, CLIENT_CONN_STATEMENT,
1409 gettext_noop("Minimum age at which VACUUM should freeze a table row."),
1412 &vacuum_freeze_min_age,
1413 100000000, 0, 1000000000, NULL, NULL
1417 {"max_fsm_relations", PGC_POSTMASTER, RESOURCES_FSM,
1418 gettext_noop("Sets the maximum number of tables and indexes for which free space is tracked."),
1422 1000, 100, INT_MAX, NULL, NULL
1425 {"max_fsm_pages", PGC_POSTMASTER, RESOURCES_FSM,
1426 gettext_noop("Sets the maximum number of disk pages for which free space is tracked."),
1430 20000, 1000, INT_MAX, NULL, NULL
1434 {"max_locks_per_transaction", PGC_POSTMASTER, LOCK_MANAGEMENT,
1435 gettext_noop("Sets the maximum number of locks per transaction."),
1436 gettext_noop("The shared lock table is sized on the assumption that "
1437 "at most max_locks_per_transaction * max_connections distinct "
1438 "objects will need to be locked at any one time.")
1440 &max_locks_per_xact,
1441 64, 10, INT_MAX, NULL, NULL
1445 {"authentication_timeout", PGC_SIGHUP, CONN_AUTH_SECURITY,
1446 gettext_noop("Sets the maximum allowed time to complete client authentication."),
1450 &AuthenticationTimeout,
1451 60, 1, 600, NULL, NULL
1455 /* Not for general use */
1456 {"pre_auth_delay", PGC_SIGHUP, DEVELOPER_OPTIONS,
1457 gettext_noop("Waits N seconds on connection startup before authentication."),
1458 gettext_noop("This allows attaching a debugger to the process."),
1459 GUC_NOT_IN_SAMPLE | GUC_UNIT_S
1462 0, 0, 60, NULL, NULL
1466 {"checkpoint_segments", PGC_SIGHUP, WAL_CHECKPOINTS,
1467 gettext_noop("Sets the maximum distance in log segments between automatic WAL checkpoints."),
1470 &CheckPointSegments,
1471 3, 1, INT_MAX, NULL, NULL
1475 {"checkpoint_timeout", PGC_SIGHUP, WAL_CHECKPOINTS,
1476 gettext_noop("Sets the maximum time between automatic WAL checkpoints."),
1481 300, 30, 3600, NULL, NULL
1485 {"checkpoint_warning", PGC_SIGHUP, WAL_CHECKPOINTS,
1486 gettext_noop("Enables warnings if checkpoint segments are filled more "
1487 "frequently than this."),
1488 gettext_noop("Write a message to the server log if checkpoints "
1489 "caused by the filling of checkpoint segment files happens more "
1490 "frequently than this number of seconds. Zero turns off the warning."),
1494 30, 0, INT_MAX, NULL, NULL
1498 {"wal_buffers", PGC_POSTMASTER, WAL_SETTINGS,
1499 gettext_noop("Sets the number of disk-page buffers in shared memory for WAL."),
1504 8, 4, INT_MAX, NULL, NULL
1508 {"wal_writer_delay", PGC_SIGHUP, WAL_SETTINGS,
1509 gettext_noop("WAL writer sleep time between WAL flushes."),
1514 200, 1, 10000, NULL, NULL
1518 {"commit_delay", PGC_USERSET, WAL_SETTINGS,
1519 gettext_noop("Sets the delay in microseconds between transaction commit and "
1520 "flushing WAL to disk."),
1524 0, 0, 100000, NULL, NULL
1528 {"commit_siblings", PGC_USERSET, WAL_SETTINGS,
1529 gettext_noop("Sets the minimum concurrent open transactions before performing "
1534 5, 1, 1000, NULL, NULL
1538 {"extra_float_digits", PGC_USERSET, CLIENT_CONN_LOCALE,
1539 gettext_noop("Sets the number of digits displayed for floating-point values."),
1540 gettext_noop("This affects real, double precision, and geometric data types. "
1541 "The parameter value is added to the standard number of digits "
1542 "(FLT_DIG or DBL_DIG as appropriate).")
1544 &extra_float_digits,
1545 0, -15, 2, NULL, NULL
1549 {"log_min_duration_statement", PGC_SUSET, LOGGING_WHEN,
1550 gettext_noop("Sets the minimum execution time above which "
1551 "statements will be logged."),
1552 gettext_noop("Zero prints all queries. -1 turns this feature off."),
1555 &log_min_duration_statement,
1556 -1, -1, INT_MAX / 1000, NULL, NULL
1560 {"log_autovacuum_min_duration", PGC_SIGHUP, LOGGING_WHAT,
1561 gettext_noop("Sets the minimum execution time above which "
1562 "autovacuum actions will be logged."),
1563 gettext_noop("Zero prints all actions. -1 turns autovacuum logging off."),
1566 &Log_autovacuum_min_duration,
1567 -1, -1, INT_MAX / 1000, NULL, NULL
1571 {"bgwriter_delay", PGC_SIGHUP, RESOURCES,
1572 gettext_noop("Background writer sleep time between rounds."),
1577 200, 10, 10000, NULL, NULL
1581 {"bgwriter_lru_maxpages", PGC_SIGHUP, RESOURCES,
1582 gettext_noop("Background writer maximum number of LRU pages to flush per round."),
1585 &bgwriter_lru_maxpages,
1586 100, 0, 1000, NULL, NULL
1590 {"log_rotation_age", PGC_SIGHUP, LOGGING_WHERE,
1591 gettext_noop("Automatic log file rotation will occur after N minutes."),
1596 HOURS_PER_DAY * MINS_PER_HOUR, 0, INT_MAX / MINS_PER_HOUR, NULL, NULL
1600 {"log_rotation_size", PGC_SIGHUP, LOGGING_WHERE,
1601 gettext_noop("Automatic log file rotation will occur after N kilobytes."),
1606 10 * 1024, 0, INT_MAX / 1024, NULL, NULL
1610 {"max_function_args", PGC_INTERNAL, PRESET_OPTIONS,
1611 gettext_noop("Shows the maximum number of function arguments."),
1613 GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
1616 FUNC_MAX_ARGS, FUNC_MAX_ARGS, FUNC_MAX_ARGS, NULL, NULL
1620 {"max_index_keys", PGC_INTERNAL, PRESET_OPTIONS,
1621 gettext_noop("Shows the maximum number of index keys."),
1623 GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
1626 INDEX_MAX_KEYS, INDEX_MAX_KEYS, INDEX_MAX_KEYS, NULL, NULL
1630 {"max_identifier_length", PGC_INTERNAL, PRESET_OPTIONS,
1631 gettext_noop("Shows the maximum identifier length."),
1633 GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
1635 &max_identifier_length,
1636 NAMEDATALEN - 1, NAMEDATALEN - 1, NAMEDATALEN - 1, NULL, NULL
1640 {"block_size", PGC_INTERNAL, PRESET_OPTIONS,
1641 gettext_noop("Shows the size of a disk block."),
1643 GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
1646 BLCKSZ, BLCKSZ, BLCKSZ, NULL, NULL
1650 {"autovacuum_naptime", PGC_SIGHUP, AUTOVACUUM,
1651 gettext_noop("Time to sleep between autovacuum runs."),
1655 &autovacuum_naptime,
1656 60, 1, INT_MAX / 1000, NULL, NULL
1659 {"autovacuum_vacuum_threshold", PGC_SIGHUP, AUTOVACUUM,
1660 gettext_noop("Minimum number of tuple updates or deletes prior to vacuum."),
1663 &autovacuum_vac_thresh,
1664 50, 0, INT_MAX, NULL, NULL
1667 {"autovacuum_analyze_threshold", PGC_SIGHUP, AUTOVACUUM,
1668 gettext_noop("Minimum number of tuple inserts, updates or deletes prior to analyze."),
1671 &autovacuum_anl_thresh,
1672 50, 0, INT_MAX, NULL, NULL
1675 /* see varsup.c for why this is PGC_POSTMASTER not PGC_SIGHUP */
1676 {"autovacuum_freeze_max_age", PGC_POSTMASTER, AUTOVACUUM,
1677 gettext_noop("Age at which to autovacuum a table to prevent transaction ID wraparound."),
1680 &autovacuum_freeze_max_age,
1681 200000000, 100000000, 2000000000, NULL, NULL
1684 /* see max_connections */
1685 {"autovacuum_max_workers", PGC_POSTMASTER, AUTOVACUUM,
1686 gettext_noop("Sets the maximum number of simultaneously running autovacuum worker processes."),
1689 &autovacuum_max_workers,
1690 3, 1, INT_MAX / 4, assign_autovacuum_max_workers, NULL
1694 {"tcp_keepalives_idle", PGC_USERSET, CLIENT_CONN_OTHER,
1695 gettext_noop("Time between issuing TCP keepalives."),
1696 gettext_noop("A value of 0 uses the system default."),
1699 &tcp_keepalives_idle,
1700 0, 0, INT_MAX, assign_tcp_keepalives_idle, show_tcp_keepalives_idle
1704 {"tcp_keepalives_interval", PGC_USERSET, CLIENT_CONN_OTHER,
1705 gettext_noop("Time between TCP keepalive retransmits."),
1706 gettext_noop("A value of 0 uses the system default."),
1709 &tcp_keepalives_interval,
1710 0, 0, INT_MAX, assign_tcp_keepalives_interval, show_tcp_keepalives_interval
1714 {"tcp_keepalives_count", PGC_USERSET, CLIENT_CONN_OTHER,
1715 gettext_noop("Maximum number of TCP keepalive retransmits."),
1716 gettext_noop("This controls the number of consecutive keepalive retransmits that can be "
1717 "lost before a connection is considered dead. A value of 0 uses the "
1720 &tcp_keepalives_count,
1721 0, 0, INT_MAX, assign_tcp_keepalives_count, show_tcp_keepalives_count
1725 {"gin_fuzzy_search_limit", PGC_USERSET, CLIENT_CONN_OTHER,
1726 gettext_noop("Sets the maximum allowed result for exact search by GIN."),
1730 &GinFuzzySearchLimit,
1731 0, 0, INT_MAX, NULL, NULL
1735 {"effective_cache_size", PGC_USERSET, QUERY_TUNING_COST,
1736 gettext_noop("Sets the planner's assumption about the size of the disk cache."),
1737 gettext_noop("That is, the portion of the kernel's disk cache that "
1738 "will be used for PostgreSQL data files. This is measured in disk "
1739 "pages, which are normally 8 kB each."),
1742 &effective_cache_size,
1743 DEFAULT_EFFECTIVE_CACHE_SIZE, 1, INT_MAX, NULL, NULL
1747 /* Can't be set in postgresql.conf */
1748 {"server_version_num", PGC_INTERNAL, PRESET_OPTIONS,
1749 gettext_noop("Shows the server version as an integer."),
1751 GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
1753 &server_version_num,
1754 PG_VERSION_NUM, PG_VERSION_NUM, PG_VERSION_NUM, NULL, NULL
1758 {"log_temp_files", PGC_USERSET, LOGGING_WHAT,
1759 gettext_noop("Log the use of temporary files larger than this number of kilobytes."),
1760 gettext_noop("Zero logs all files. The default is -1 (turning this feature off)."),
1764 -1, -1, INT_MAX, NULL, NULL
1767 /* End-of-list marker */
1769 {NULL, 0, 0, NULL, NULL}, NULL, 0, 0, 0, NULL, NULL
1774 static struct config_real ConfigureNamesReal[] =
1777 {"seq_page_cost", PGC_USERSET, QUERY_TUNING_COST,
1778 gettext_noop("Sets the planner's estimate of the cost of a "
1779 "sequentially fetched disk page."),
1783 DEFAULT_SEQ_PAGE_COST, 0, DBL_MAX, NULL, NULL
1786 {"random_page_cost", PGC_USERSET, QUERY_TUNING_COST,
1787 gettext_noop("Sets the planner's estimate of the cost of a "
1788 "nonsequentially fetched disk page."),
1792 DEFAULT_RANDOM_PAGE_COST, 0, DBL_MAX, NULL, NULL
1795 {"cpu_tuple_cost", PGC_USERSET, QUERY_TUNING_COST,
1796 gettext_noop("Sets the planner's estimate of the cost of "
1797 "processing each tuple (row)."),
1801 DEFAULT_CPU_TUPLE_COST, 0, DBL_MAX, NULL, NULL
1804 {"cpu_index_tuple_cost", PGC_USERSET, QUERY_TUNING_COST,
1805 gettext_noop("Sets the planner's estimate of the cost of "
1806 "processing each index entry during an index scan."),
1809 &cpu_index_tuple_cost,
1810 DEFAULT_CPU_INDEX_TUPLE_COST, 0, DBL_MAX, NULL, NULL
1813 {"cpu_operator_cost", PGC_USERSET, QUERY_TUNING_COST,
1814 gettext_noop("Sets the planner's estimate of the cost of "
1815 "processing each operator or function call."),
1819 DEFAULT_CPU_OPERATOR_COST, 0, DBL_MAX, NULL, NULL
1823 {"geqo_selection_bias", PGC_USERSET, QUERY_TUNING_GEQO,
1824 gettext_noop("GEQO: selective pressure within the population."),
1827 &Geqo_selection_bias,
1828 DEFAULT_GEQO_SELECTION_BIAS, MIN_GEQO_SELECTION_BIAS,
1829 MAX_GEQO_SELECTION_BIAS, NULL, NULL
1833 {"bgwriter_lru_multiplier", PGC_SIGHUP, RESOURCES,
1834 gettext_noop("Background writer multiplier on average buffers to scan per round."),
1837 &bgwriter_lru_multiplier,
1838 2.0, 0.0, 10.0, NULL, NULL
1842 {"seed", PGC_USERSET, UNGROUPED,
1843 gettext_noop("Sets the seed for random-number generation."),
1845 GUC_NO_SHOW_ALL | GUC_NO_RESET_ALL | GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
1848 0.5, 0.0, 1.0, assign_random_seed, show_random_seed
1852 {"autovacuum_vacuum_scale_factor", PGC_SIGHUP, AUTOVACUUM,
1853 gettext_noop("Number of tuple updates or deletes prior to vacuum as a fraction of reltuples."),
1856 &autovacuum_vac_scale,
1857 0.2, 0.0, 100.0, NULL, NULL
1860 {"autovacuum_analyze_scale_factor", PGC_SIGHUP, AUTOVACUUM,
1861 gettext_noop("Number of tuple inserts, updates or deletes prior to analyze as a fraction of reltuples."),
1864 &autovacuum_anl_scale,
1865 0.1, 0.0, 100.0, NULL, NULL
1869 {"checkpoint_completion_target", PGC_SIGHUP, WAL_CHECKPOINTS,
1870 gettext_noop("Time spent flushing dirty buffers during checkpoint, as fraction of checkpoint interval."),
1873 &CheckPointCompletionTarget,
1874 0.5, 0.0, 1.0, NULL, NULL
1877 /* End-of-list marker */
1879 {NULL, 0, 0, NULL, NULL}, NULL, 0.0, 0.0, 0.0, NULL, NULL
1884 static struct config_string ConfigureNamesString[] =
1887 {"archive_command", PGC_SIGHUP, WAL_SETTINGS,
1888 gettext_noop("Sets the shell command that will be called to archive a WAL file."),
1891 &XLogArchiveCommand,
1892 "", NULL, show_archive_command
1896 {"backslash_quote", PGC_USERSET, COMPAT_OPTIONS_PREVIOUS,
1897 gettext_noop("Sets whether \"\\'\" is allowed in string literals."),
1898 gettext_noop("Valid values are ON, OFF, and SAFE_ENCODING.")
1900 &backslash_quote_string,
1901 "safe_encoding", assign_backslash_quote, NULL
1905 {"client_encoding", PGC_USERSET, CLIENT_CONN_LOCALE,
1906 gettext_noop("Sets the client's character set encoding."),
1908 GUC_IS_NAME | GUC_REPORT
1910 &client_encoding_string,
1911 "SQL_ASCII", assign_client_encoding, NULL
1915 {"client_min_messages", PGC_USERSET, LOGGING_WHEN,
1916 gettext_noop("Sets the message levels that are sent to the client."),
1917 gettext_noop("Valid values are DEBUG5, DEBUG4, DEBUG3, DEBUG2, "
1918 "DEBUG1, LOG, NOTICE, WARNING, and ERROR. Each level includes all the "
1919 "levels that follow it. The later the level, the fewer messages are "
1922 &client_min_messages_str,
1923 "notice", assign_client_min_messages, NULL
1927 {"log_min_messages", PGC_SUSET, LOGGING_WHEN,
1928 gettext_noop("Sets the message levels that are logged."),
1929 gettext_noop("Valid values are DEBUG5, DEBUG4, DEBUG3, DEBUG2, DEBUG1, "
1930 "INFO, NOTICE, WARNING, ERROR, LOG, FATAL, and PANIC. Each level "
1931 "includes all the levels that follow it.")
1933 &log_min_messages_str,
1934 "notice", assign_log_min_messages, NULL
1938 {"log_error_verbosity", PGC_SUSET, LOGGING_WHEN,
1939 gettext_noop("Sets the verbosity of logged messages."),
1940 gettext_noop("Valid values are \"terse\", \"default\", and \"verbose\".")
1942 &log_error_verbosity_str,
1943 "default", assign_log_error_verbosity, NULL
1946 {"log_statement", PGC_SUSET, LOGGING_WHAT,
1947 gettext_noop("Sets the type of statements logged."),
1948 gettext_noop("Valid values are \"none\", \"ddl\", \"mod\", and \"all\".")
1951 "none", assign_log_statement, NULL
1955 {"log_min_error_statement", PGC_SUSET, LOGGING_WHEN,
1956 gettext_noop("Causes all statements generating error at or above this level to be logged."),
1957 gettext_noop("All SQL statements that cause an error of the "
1958 "specified level or a higher level are logged.")
1960 &log_min_error_statement_str,
1961 "error", assign_min_error_statement, NULL
1965 {"log_line_prefix", PGC_SIGHUP, LOGGING_WHAT,
1966 gettext_noop("Controls information prefixed to each log line."),
1967 gettext_noop("If blank, no prefix is used.")
1974 {"log_timezone", PGC_SIGHUP, LOGGING_WHAT,
1975 gettext_noop("Sets the time zone to use in log messages."),
1978 &log_timezone_string,
1979 "UNKNOWN", assign_log_timezone, show_log_timezone
1983 {"DateStyle", PGC_USERSET, CLIENT_CONN_LOCALE,
1984 gettext_noop("Sets the display format for date and time values."),
1985 gettext_noop("Also controls interpretation of ambiguous "
1987 GUC_LIST_INPUT | GUC_REPORT
1990 "ISO, MDY", assign_datestyle, NULL
1994 {"default_tablespace", PGC_USERSET, CLIENT_CONN_STATEMENT,
1995 gettext_noop("Sets the default tablespace to create tables and indexes in."),
1996 gettext_noop("An empty string selects the database's default tablespace."),
1999 &default_tablespace,
2000 "", assign_default_tablespace, NULL
2004 {"temp_tablespaces", PGC_USERSET, CLIENT_CONN_STATEMENT,
2005 gettext_noop("Sets the tablespace(s) to use for temporary tables and sort files."),
2007 GUC_LIST_INPUT | GUC_LIST_QUOTE
2010 "", assign_temp_tablespaces, NULL
2014 {"default_transaction_isolation", PGC_USERSET, CLIENT_CONN_STATEMENT,
2015 gettext_noop("Sets the transaction isolation level of each new transaction."),
2016 gettext_noop("Each SQL transaction has an isolation level, which "
2017 "can be either \"read uncommitted\", \"read committed\", \"repeatable read\", or \"serializable\".")
2019 &default_iso_level_string,
2020 "read committed", assign_defaultxactisolevel, NULL
2024 {"session_replication_role", PGC_SUSET, CLIENT_CONN_STATEMENT,
2025 gettext_noop("Sets the sessions behavior for triggers and rewrite rules."),
2026 gettext_noop("Each session can be either"
2027 " \"origin\", \"replica\", or \"local\".")
2029 &session_replication_role_string,
2030 "origin", assign_session_replication_role, NULL
2034 {"dynamic_library_path", PGC_SUSET, CLIENT_CONN_OTHER,
2035 gettext_noop("Sets the path for dynamically loadable modules."),
2036 gettext_noop("If a dynamically loadable module needs to be opened and "
2037 "the specified name does not have a directory component (i.e., the "
2038 "name does not contain a slash), the system will search this path for "
2039 "the specified file."),
2042 &Dynamic_library_path,
2043 "$libdir", NULL, NULL
2047 {"krb_realm", PGC_POSTMASTER, CONN_AUTH_SECURITY,
2048 gettext_noop("Sets realm to match Kerberos and GSSAPI users against."),
2057 {"krb_server_keyfile", PGC_POSTMASTER, CONN_AUTH_SECURITY,
2058 gettext_noop("Sets the location of the Kerberos server key file."),
2062 &pg_krb_server_keyfile,
2063 PG_KRB_SRVTAB, NULL, NULL
2067 {"krb_srvname", PGC_POSTMASTER, CONN_AUTH_SECURITY,
2068 gettext_noop("Sets the name of the Kerberos service."),
2072 PG_KRB_SRVNAM, NULL, NULL
2076 {"krb_server_hostname", PGC_POSTMASTER, CONN_AUTH_SECURITY,
2077 gettext_noop("Sets the hostname of the Kerberos server."),
2080 &pg_krb_server_hostname,
2085 {"bonjour_name", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
2086 gettext_noop("Sets the Bonjour broadcast service name."),
2093 /* See main.c about why defaults for LC_foo are not all alike */
2096 {"lc_collate", PGC_INTERNAL, CLIENT_CONN_LOCALE,
2097 gettext_noop("Shows the collation order locale."),
2099 GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
2106 {"lc_ctype", PGC_INTERNAL, CLIENT_CONN_LOCALE,
2107 gettext_noop("Shows the character classification and case conversion locale."),
2109 GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
2116 {"lc_messages", PGC_SUSET, CLIENT_CONN_LOCALE,
2117 gettext_noop("Sets the language in which messages are displayed."),
2121 "", locale_messages_assign, NULL
2125 {"lc_monetary", PGC_USERSET, CLIENT_CONN_LOCALE,
2126 gettext_noop("Sets the locale for formatting monetary amounts."),
2130 "C", locale_monetary_assign, NULL
2134 {"lc_numeric", PGC_USERSET, CLIENT_CONN_LOCALE,
2135 gettext_noop("Sets the locale for formatting numbers."),
2139 "C", locale_numeric_assign, NULL
2143 {"lc_time", PGC_USERSET, CLIENT_CONN_LOCALE,
2144 gettext_noop("Sets the locale for formatting date and time values."),
2148 "C", locale_time_assign, NULL
2152 {"shared_preload_libraries", PGC_POSTMASTER, RESOURCES_KERNEL,
2153 gettext_noop("Lists shared libraries to preload into server."),
2155 GUC_LIST_INPUT | GUC_LIST_QUOTE | GUC_SUPERUSER_ONLY
2157 &shared_preload_libraries_string,
2162 {"local_preload_libraries", PGC_BACKEND, CLIENT_CONN_OTHER,
2163 gettext_noop("Lists shared libraries to preload into each backend."),
2165 GUC_LIST_INPUT | GUC_LIST_QUOTE
2167 &local_preload_libraries_string,
2172 {"regex_flavor", PGC_USERSET, COMPAT_OPTIONS_PREVIOUS,
2173 gettext_noop("Sets the regular expression \"flavor\"."),
2174 gettext_noop("This can be set to advanced, extended, or basic.")
2176 ®ex_flavor_string,
2177 "advanced", assign_regex_flavor, NULL
2181 {"search_path", PGC_USERSET, CLIENT_CONN_STATEMENT,
2182 gettext_noop("Sets the schema search order for names that are not schema-qualified."),
2184 GUC_LIST_INPUT | GUC_LIST_QUOTE
2186 &namespace_search_path,
2187 "\"$user\",public", assign_search_path, NULL
2191 /* Can't be set in postgresql.conf */
2192 {"server_encoding", PGC_INTERNAL, CLIENT_CONN_LOCALE,
2193 gettext_noop("Sets the server (database) character set encoding."),
2195 GUC_IS_NAME | GUC_REPORT | GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
2197 &server_encoding_string,
2198 "SQL_ASCII", NULL, NULL
2202 /* Can't be set in postgresql.conf */
2203 {"server_version", PGC_INTERNAL, PRESET_OPTIONS,
2204 gettext_noop("Shows the server version."),
2206 GUC_REPORT | GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
2208 &server_version_string,
2209 PG_VERSION, NULL, NULL
2213 /* Not for general use --- used by SET ROLE */
2214 {"role", PGC_USERSET, UNGROUPED,
2215 gettext_noop("Sets the current role."),
2217 GUC_IS_NAME | GUC_NO_SHOW_ALL | GUC_NO_RESET_ALL | GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
2220 "none", assign_role, show_role
2224 /* Not for general use --- used by SET SESSION AUTHORIZATION */
2225 {"session_authorization", PGC_USERSET, UNGROUPED,
2226 gettext_noop("Sets the session user name."),
2228 GUC_IS_NAME | GUC_REPORT | GUC_NO_SHOW_ALL | GUC_NO_RESET_ALL | GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
2230 &session_authorization_string,
2231 NULL, assign_session_authorization, show_session_authorization
2235 {"log_destination", PGC_SIGHUP, LOGGING_WHERE,
2236 gettext_noop("Sets the destination for server log output."),
2237 gettext_noop("Valid values are combinations of \"stderr\", "
2238 "\"syslog\", \"csvlog\", and \"eventlog\", "
2239 "depending on the platform."),
2242 &log_destination_string,
2243 "stderr", assign_log_destination, NULL
2246 {"log_directory", PGC_SIGHUP, LOGGING_WHERE,
2247 gettext_noop("Sets the destination directory for log files."),
2248 gettext_noop("Can be specified as relative to the data directory "
2249 "or as absolute path."),
2253 "pg_log", assign_canonical_path, NULL
2256 {"log_filename", PGC_SIGHUP, LOGGING_WHERE,
2257 gettext_noop("Sets the file name pattern for log files."),
2262 "postgresql-%Y-%m-%d_%H%M%S.log", NULL, NULL
2267 {"syslog_facility", PGC_SIGHUP, LOGGING_WHERE,
2268 gettext_noop("Sets the syslog \"facility\" to be used when syslog enabled."),
2269 gettext_noop("Valid values are LOCAL0, LOCAL1, LOCAL2, LOCAL3, "
2270 "LOCAL4, LOCAL5, LOCAL6, LOCAL7.")
2272 &syslog_facility_str,
2273 "LOCAL0", assign_syslog_facility, NULL
2276 {"syslog_ident", PGC_SIGHUP, LOGGING_WHERE,
2277 gettext_noop("Sets the program name used to identify PostgreSQL "
2278 "messages in syslog."),
2282 "postgres", assign_syslog_ident, NULL
2287 {"TimeZone", PGC_USERSET, CLIENT_CONN_LOCALE,
2288 gettext_noop("Sets the time zone for displaying and interpreting time stamps."),
2293 "UNKNOWN", assign_timezone, show_timezone
2296 {"timezone_abbreviations", PGC_USERSET, CLIENT_CONN_LOCALE,
2297 gettext_noop("Selects a file of time zone abbreviations."),
2300 &timezone_abbreviations_string,
2301 "UNKNOWN", assign_timezone_abbreviations, NULL
2305 {"transaction_isolation", PGC_USERSET, CLIENT_CONN_STATEMENT,
2306 gettext_noop("Sets the current transaction's isolation level."),
2308 GUC_NO_RESET_ALL | GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
2310 &XactIsoLevel_string,
2311 NULL, assign_XactIsoLevel, show_XactIsoLevel
2315 {"unix_socket_group", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
2316 gettext_noop("Sets the owning group of the Unix-domain socket."),
2317 gettext_noop("The owning user of the socket is always the user "
2318 "that starts the server.")
2325 {"unix_socket_directory", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
2326 gettext_noop("Sets the directory where the Unix-domain socket will be created."),
2331 "", assign_canonical_path, NULL
2335 {"listen_addresses", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
2336 gettext_noop("Sets the host name or IP address(es) to listen to."),
2341 "localhost", NULL, NULL
2345 {"wal_sync_method", PGC_SIGHUP, WAL_SETTINGS,
2346 gettext_noop("Selects the method used for forcing WAL updates to disk."),
2350 XLOG_sync_method_default, assign_xlog_sync_method, NULL
2354 {"custom_variable_classes", PGC_SIGHUP, CUSTOM_OPTIONS,
2355 gettext_noop("Sets the list of known custom variable classes."),
2357 GUC_LIST_INPUT | GUC_LIST_QUOTE
2359 &custom_variable_classes,
2360 NULL, assign_custom_variable_classes, NULL
2364 {"data_directory", PGC_POSTMASTER, FILE_LOCATIONS,
2365 gettext_noop("Sets the server's data directory."),
2374 {"config_file", PGC_POSTMASTER, FILE_LOCATIONS,
2375 gettext_noop("Sets the server's main configuration file."),
2377 GUC_DISALLOW_IN_FILE | GUC_SUPERUSER_ONLY
2384 {"hba_file", PGC_POSTMASTER, FILE_LOCATIONS,
2385 gettext_noop("Sets the server's \"hba\" configuration file."),
2394 {"ident_file", PGC_POSTMASTER, FILE_LOCATIONS,
2395 gettext_noop("Sets the server's \"ident\" configuration file."),
2404 {"external_pid_file", PGC_POSTMASTER, FILE_LOCATIONS,
2405 gettext_noop("Writes the postmaster PID to the specified file."),
2410 NULL, assign_canonical_path, NULL
2414 {"xmlbinary", PGC_USERSET, CLIENT_CONN_STATEMENT,
2415 gettext_noop("Sets how binary values are to be encoded in XML."),
2416 gettext_noop("Valid values are BASE64 and HEX.")
2419 "base64", assign_xmlbinary, NULL
2423 {"xmloption", PGC_USERSET, CLIENT_CONN_STATEMENT,
2424 gettext_noop("Sets whether XML data in implicit parsing and serialization "
2425 "operations is to be considered as documents or content fragments."),
2426 gettext_noop("Valid values are DOCUMENT and CONTENT.")
2429 "content", assign_xmloption, NULL
2433 {"default_text_search_config", PGC_USERSET, CLIENT_CONN_LOCALE,
2434 gettext_noop("Sets default text search configuration."),
2438 "pg_catalog.simple", assignTSCurrentConfig, NULL
2443 {"ssl_ciphers", PGC_POSTMASTER, CONN_AUTH_SECURITY,
2444 gettext_noop("Sets the list of allowed SSL ciphers."),
2449 "ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH", NULL, NULL
2451 #endif /* USE_SSL */
2453 /* End-of-list marker */
2455 {NULL, 0, 0, NULL, NULL}, NULL, NULL, NULL, NULL
2460 /******** end of options list ********/
2464 * To allow continued support of obsolete names for GUC variables, we apply
2465 * the following mappings to any unrecognized name. Note that an old name
2466 * should be mapped to a new one only if the new variable has very similar
2467 * semantics to the old.
2469 static const char *const map_old_guc_names[] = {
2470 "sort_mem", "work_mem",
2471 "vacuum_mem", "maintenance_work_mem",
2477 * Actual lookup of variables is done through this single, sorted array.
2479 static struct config_generic **guc_variables;
2481 /* Current number of variables contained in the vector */
2482 static int num_guc_variables;
2484 /* Vector capacity */
2485 static int size_guc_variables;
2488 static bool guc_dirty; /* TRUE if need to do commit/abort work */
2490 static bool reporting_enabled; /* TRUE to enable GUC_REPORT */
2492 static int GUCNestLevel = 0; /* 1 when in main transaction */
2495 static int guc_var_compare(const void *a, const void *b);
2496 static int guc_name_compare(const char *namea, const char *nameb);
2497 static void push_old_value(struct config_generic * gconf, GucAction action);
2498 static void ReportGUCOption(struct config_generic * record);
2499 static void ShowGUCConfigOption(const char *name, DestReceiver *dest);
2500 static void ShowAllGUCConfig(DestReceiver *dest);
2501 static char *_ShowOption(struct config_generic * record, bool use_units);
2502 static bool is_newvalue_equal(struct config_generic * record, const char *newvalue);
2506 * Some infrastructure for checking malloc/strdup/realloc calls
2509 guc_malloc(int elevel, size_t size)
2513 data = malloc(size);
2516 (errcode(ERRCODE_OUT_OF_MEMORY),
2517 errmsg("out of memory")));
2522 guc_realloc(int elevel, void *old, size_t size)
2526 data = realloc(old, size);
2529 (errcode(ERRCODE_OUT_OF_MEMORY),
2530 errmsg("out of memory")));
2535 guc_strdup(int elevel, const char *src)
2542 (errcode(ERRCODE_OUT_OF_MEMORY),
2543 errmsg("out of memory")));
2549 * Support for assigning to a field of a string GUC item. Free the prior
2550 * value if it's not referenced anywhere else in the item (including stacked
2554 set_string_field(struct config_string * conf, char **field, char *newval)
2556 char *oldval = *field;
2559 /* Do the assignment */
2562 /* Exit if any duplicate references, or if old value was NULL anyway */
2563 if (oldval == NULL ||
2564 oldval == *(conf->variable) ||
2565 oldval == conf->reset_val ||
2566 oldval == conf->boot_val)
2568 for (stack = conf->gen.stack; stack; stack = stack->prev)
2570 if (oldval == stack->prior.stringval ||
2571 oldval == stack->masked.stringval)
2575 /* Not used anymore, so free it */
2580 * Detect whether strval is referenced anywhere in a GUC string item
2583 string_field_used(struct config_string * conf, char *strval)
2587 if (strval == *(conf->variable) ||
2588 strval == conf->reset_val ||
2589 strval == conf->boot_val)
2591 for (stack = conf->gen.stack; stack; stack = stack->prev)
2593 if (strval == stack->prior.stringval ||
2594 strval == stack->masked.stringval)
2601 * Support for copying a variable's active value into a stack entry
2604 set_stack_value(struct config_generic * gconf, union config_var_value * val)
2606 switch (gconf->vartype)
2610 *((struct config_bool *) gconf)->variable;
2614 *((struct config_int *) gconf)->variable;
2618 *((struct config_real *) gconf)->variable;
2621 /* we assume stringval is NULL if not valid */
2622 set_string_field((struct config_string *) gconf,
2624 *((struct config_string *) gconf)->variable);
2630 * Support for discarding a no-longer-needed value in a stack entry
2633 discard_stack_value(struct config_generic * gconf, union config_var_value * val)
2635 switch (gconf->vartype)
2640 /* no need to do anything */
2643 set_string_field((struct config_string *) gconf,
2652 * Fetch the sorted array pointer (exported for help_config.c's use ONLY)
2654 struct config_generic **
2655 get_guc_variables(void)
2657 return guc_variables;
2662 * Build the sorted array. This is split out so that it could be
2663 * re-executed after startup (eg, we could allow loadable modules to
2664 * add vars, and then we'd need to re-sort).
2667 build_guc_variables(void)
2671 struct config_generic **guc_vars;
2674 for (i = 0; ConfigureNamesBool[i].gen.name; i++)
2676 struct config_bool *conf = &ConfigureNamesBool[i];
2678 /* Rather than requiring vartype to be filled in by hand, do this: */
2679 conf->gen.vartype = PGC_BOOL;
2683 for (i = 0; ConfigureNamesInt[i].gen.name; i++)
2685 struct config_int *conf = &ConfigureNamesInt[i];
2687 conf->gen.vartype = PGC_INT;
2691 for (i = 0; ConfigureNamesReal[i].gen.name; i++)
2693 struct config_real *conf = &ConfigureNamesReal[i];
2695 conf->gen.vartype = PGC_REAL;
2699 for (i = 0; ConfigureNamesString[i].gen.name; i++)
2701 struct config_string *conf = &ConfigureNamesString[i];
2703 conf->gen.vartype = PGC_STRING;
2708 * Create table with 20% slack
2710 size_vars = num_vars + num_vars / 4;
2712 guc_vars = (struct config_generic **)
2713 guc_malloc(FATAL, size_vars * sizeof(struct config_generic *));
2717 for (i = 0; ConfigureNamesBool[i].gen.name; i++)
2718 guc_vars[num_vars++] = &ConfigureNamesBool[i].gen;
2720 for (i = 0; ConfigureNamesInt[i].gen.name; i++)
2721 guc_vars[num_vars++] = &ConfigureNamesInt[i].gen;
2723 for (i = 0; ConfigureNamesReal[i].gen.name; i++)
2724 guc_vars[num_vars++] = &ConfigureNamesReal[i].gen;
2726 for (i = 0; ConfigureNamesString[i].gen.name; i++)
2727 guc_vars[num_vars++] = &ConfigureNamesString[i].gen;
2730 free(guc_variables);
2731 guc_variables = guc_vars;
2732 num_guc_variables = num_vars;
2733 size_guc_variables = size_vars;
2734 qsort((void *) guc_variables, num_guc_variables,
2735 sizeof(struct config_generic *), guc_var_compare);
2739 * Add a new GUC variable to the list of known variables. The
2740 * list is expanded if needed.
2743 add_guc_variable(struct config_generic * var, int elevel)
2745 if (num_guc_variables + 1 >= size_guc_variables)
2748 * Increase the vector by 25%
2750 int size_vars = size_guc_variables + size_guc_variables / 4;
2751 struct config_generic **guc_vars;
2756 guc_vars = (struct config_generic **)
2757 guc_malloc(elevel, size_vars * sizeof(struct config_generic *));
2761 guc_vars = (struct config_generic **)
2762 guc_realloc(elevel, guc_variables, size_vars * sizeof(struct config_generic *));
2765 if (guc_vars == NULL)
2766 return false; /* out of memory */
2768 guc_variables = guc_vars;
2769 size_guc_variables = size_vars;
2771 guc_variables[num_guc_variables++] = var;
2772 qsort((void *) guc_variables, num_guc_variables,
2773 sizeof(struct config_generic *), guc_var_compare);
2778 * Create and add a placeholder variable. It's presumed to belong
2779 * to a valid custom variable class at this point.
2781 static struct config_generic *
2782 add_placeholder_variable(const char *name, int elevel)
2784 size_t sz = sizeof(struct config_string) + sizeof(char *);
2785 struct config_string *var;
2786 struct config_generic *gen;
2788 var = (struct config_string *) guc_malloc(elevel, sz);
2794 gen->name = guc_strdup(elevel, name);
2795 if (gen->name == NULL)
2801 gen->context = PGC_USERSET;
2802 gen->group = CUSTOM_OPTIONS;
2803 gen->short_desc = "GUC placeholder variable";
2804 gen->flags = GUC_NO_SHOW_ALL | GUC_NOT_IN_SAMPLE | GUC_CUSTOM_PLACEHOLDER;
2805 gen->vartype = PGC_STRING;
2808 * The char* is allocated at the end of the struct since we have no
2809 * 'static' place to point to. Note that the current value, as well as
2810 * the boot and reset values, start out NULL.
2812 var->variable = (char **) (var + 1);
2814 if (!add_guc_variable((struct config_generic *) var, elevel))
2816 free((void *) gen->name);
2825 * Detect whether the portion of "name" before dotPos matches any custom
2826 * variable class name listed in custom_var_classes. The latter must be
2827 * formatted the way that assign_custom_variable_classes does it, ie,
2828 * no whitespace. NULL is valid for custom_var_classes.
2831 is_custom_class(const char *name, int dotPos, const char *custom_var_classes)
2833 bool result = false;
2834 const char *ccs = custom_var_classes;
2838 const char *start = ccs;
2844 if (c == '\0' || c == ',')
2846 if (dotPos == ccs - start && strncmp(start, name, dotPos) == 0)
2861 * Look up option NAME. If it exists, return a pointer to its record,
2862 * else return NULL. If create_placeholders is TRUE, we'll create a
2863 * placeholder record for a valid-looking custom variable name.
2865 static struct config_generic *
2866 find_option(const char *name, bool create_placeholders, int elevel)
2868 const char **key = &name;
2869 struct config_generic **res;
2875 * By equating const char ** with struct config_generic *, we are assuming
2876 * the name field is first in config_generic.
2878 res = (struct config_generic **) bsearch((void *) &key,
2879 (void *) guc_variables,
2881 sizeof(struct config_generic *),
2887 * See if the name is an obsolete name for a variable. We assume that the
2888 * set of supported old names is short enough that a brute-force search is
2891 for (i = 0; map_old_guc_names[i] != NULL; i += 2)
2893 if (guc_name_compare(name, map_old_guc_names[i]) == 0)
2894 return find_option(map_old_guc_names[i + 1], false, elevel);
2897 if (create_placeholders)
2900 * Check if the name is qualified, and if so, check if the qualifier
2901 * matches any custom variable class. If so, add a placeholder.
2903 const char *dot = strchr(name, GUC_QUALIFIER_SEPARATOR);
2906 is_custom_class(name, dot - name, custom_variable_classes))
2907 return add_placeholder_variable(name, elevel);
2916 * comparator for qsorting and bsearching guc_variables array
2919 guc_var_compare(const void *a, const void *b)
2921 struct config_generic *confa = *(struct config_generic **) a;
2922 struct config_generic *confb = *(struct config_generic **) b;
2924 return guc_name_compare(confa->name, confb->name);
2928 * the bare comparison function for GUC names
2931 guc_name_compare(const char *namea, const char *nameb)
2934 * The temptation to use strcasecmp() here must be resisted, because the
2935 * array ordering has to remain stable across setlocale() calls. So, build
2936 * our own with a simple ASCII-only downcasing.
2938 while (*namea && *nameb)
2940 char cha = *namea++;
2941 char chb = *nameb++;
2943 if (cha >= 'A' && cha <= 'Z')
2945 if (chb >= 'A' && chb <= 'Z')
2951 return 1; /* a is longer */
2953 return -1; /* b is longer */
2959 * Initialize GUC options during program startup.
2961 * Note that we cannot read the config file yet, since we have not yet
2962 * processed command-line switches.
2965 InitializeGUCOptions(void)
2972 * Before log_line_prefix could possibly receive a nonempty setting, make
2973 * sure that timezone processing is minimally alive (see elog.c).
2975 pg_timezone_pre_initialize();
2978 * Build sorted array of all GUC variables.
2980 build_guc_variables();
2983 * Load all variables with their compiled-in defaults, and initialize
2984 * status fields as needed.
2986 for (i = 0; i < num_guc_variables; i++)
2988 struct config_generic *gconf = guc_variables[i];
2991 gconf->reset_source = PGC_S_DEFAULT;
2992 gconf->source = PGC_S_DEFAULT;
2993 gconf->stack = NULL;
2995 switch (gconf->vartype)
2999 struct config_bool *conf = (struct config_bool *) gconf;
3001 if (conf->assign_hook)
3002 if (!(*conf->assign_hook) (conf->boot_val, true,
3004 elog(FATAL, "failed to initialize %s to %d",
3005 conf->gen.name, (int) conf->boot_val);
3006 *conf->variable = conf->reset_val = conf->boot_val;
3011 struct config_int *conf = (struct config_int *) gconf;
3013 Assert(conf->boot_val >= conf->min);
3014 Assert(conf->boot_val <= conf->max);
3015 if (conf->assign_hook)
3016 if (!(*conf->assign_hook) (conf->boot_val, true,
3018 elog(FATAL, "failed to initialize %s to %d",
3019 conf->gen.name, conf->boot_val);
3020 *conf->variable = conf->reset_val = conf->boot_val;
3025 struct config_real *conf = (struct config_real *) gconf;
3027 Assert(conf->boot_val >= conf->min);
3028 Assert(conf->boot_val <= conf->max);
3029 if (conf->assign_hook)
3030 if (!(*conf->assign_hook) (conf->boot_val, true,
3032 elog(FATAL, "failed to initialize %s to %g",
3033 conf->gen.name, conf->boot_val);
3034 *conf->variable = conf->reset_val = conf->boot_val;
3039 struct config_string *conf = (struct config_string *) gconf;
3042 *conf->variable = NULL;
3043 conf->reset_val = NULL;
3045 if (conf->boot_val == NULL)
3047 /* leave the value NULL, do not call assign hook */
3051 str = guc_strdup(FATAL, conf->boot_val);
3052 conf->reset_val = str;
3054 if (conf->assign_hook)
3058 newstr = (*conf->assign_hook) (str, true,
3062 elog(FATAL, "failed to initialize %s to \"%s\"",
3063 conf->gen.name, str);
3065 else if (newstr != str)
3070 * See notes in set_config_option about casting
3072 str = (char *) newstr;
3073 conf->reset_val = str;
3076 *conf->variable = str;
3084 reporting_enabled = false;
3087 * Prevent any attempt to override the transaction modes from
3088 * non-interactive sources.
3090 SetConfigOption("transaction_isolation", "default",
3091 PGC_POSTMASTER, PGC_S_OVERRIDE);
3092 SetConfigOption("transaction_read_only", "no",
3093 PGC_POSTMASTER, PGC_S_OVERRIDE);
3096 * For historical reasons, some GUC parameters can receive defaults from
3097 * environment variables. Process those settings. NB: if you add or
3098 * remove anything here, see also ProcessConfigFile().
3101 env = getenv("PGPORT");
3103 SetConfigOption("port", env, PGC_POSTMASTER, PGC_S_ENV_VAR);
3105 env = getenv("PGDATESTYLE");
3107 SetConfigOption("datestyle", env, PGC_POSTMASTER, PGC_S_ENV_VAR);
3109 env = getenv("PGCLIENTENCODING");
3111 SetConfigOption("client_encoding", env, PGC_POSTMASTER, PGC_S_ENV_VAR);
3114 * rlimit isn't exactly an "environment variable", but it behaves about
3115 * the same. If we can identify the platform stack depth rlimit, increase
3116 * default stack depth setting up to whatever is safe (but at most 2MB).
3118 stack_rlimit = get_stack_depth_rlimit();
3119 if (stack_rlimit > 0)
3121 int new_limit = (stack_rlimit - STACK_DEPTH_SLOP) / 1024L;
3123 if (new_limit > 100)
3127 new_limit = Min(new_limit, 2048);
3128 sprintf(limbuf, "%d", new_limit);
3129 SetConfigOption("max_stack_depth", limbuf,
3130 PGC_POSTMASTER, PGC_S_ENV_VAR);
3137 * Select the configuration files and data directory to be used, and
3138 * do the initial read of postgresql.conf.
3140 * This is called after processing command-line switches.
3141 * userDoption is the -D switch value if any (NULL if unspecified).
3142 * progname is just for use in error messages.
3144 * Returns true on success; on failure, prints a suitable error message
3145 * to stderr and returns false.
3148 SelectConfigFiles(const char *userDoption, const char *progname)
3152 struct stat stat_buf;
3154 /* configdir is -D option, or $PGDATA if no -D */
3156 configdir = make_absolute_path(userDoption);
3158 configdir = make_absolute_path(getenv("PGDATA"));
3161 * Find the configuration file: if config_file was specified on the
3162 * command line, use it, else use configdir/postgresql.conf. In any case
3163 * ensure the result is an absolute path, so that it will be interpreted
3164 * the same way by future backends.
3167 fname = make_absolute_path(ConfigFileName);
3170 fname = guc_malloc(FATAL,
3171 strlen(configdir) + strlen(CONFIG_FILENAME) + 2);
3172 sprintf(fname, "%s/%s", configdir, CONFIG_FILENAME);
3176 write_stderr("%s does not know where to find the server configuration file.\n"
3177 "You must specify the --config-file or -D invocation "
3178 "option or set the PGDATA environment variable.\n",
3184 * Set the ConfigFileName GUC variable to its final value, ensuring that
3185 * it can't be overridden later.
3187 SetConfigOption("config_file", fname, PGC_POSTMASTER, PGC_S_OVERRIDE);
3191 * Now read the config file for the first time.
3193 if (stat(ConfigFileName, &stat_buf) != 0)
3195 write_stderr("%s cannot access the server configuration file \"%s\": %s\n",
3196 progname, ConfigFileName, strerror(errno));
3200 ProcessConfigFile(PGC_POSTMASTER);
3203 * If the data_directory GUC variable has been set, use that as DataDir;
3204 * otherwise use configdir if set; else punt.
3206 * Note: SetDataDir will copy and absolute-ize its argument, so we don't
3210 SetDataDir(data_directory);
3212 SetDataDir(configdir);
3215 write_stderr("%s does not know where to find the database system data.\n"
3216 "This can be specified as \"data_directory\" in \"%s\", "
3217 "or by the -D invocation option, or by the "
3218 "PGDATA environment variable.\n",
3219 progname, ConfigFileName);
3224 * Reflect the final DataDir value back into the data_directory GUC var.
3225 * (If you are wondering why we don't just make them a single variable,
3226 * it's because the EXEC_BACKEND case needs DataDir to be transmitted to
3227 * child backends specially. XXX is that still true? Given that we now
3228 * chdir to DataDir, EXEC_BACKEND can read the config file without knowing
3229 * DataDir in advance.)
3231 SetConfigOption("data_directory", DataDir, PGC_POSTMASTER, PGC_S_OVERRIDE);
3234 * Figure out where pg_hba.conf is, and make sure the path is absolute.
3237 fname = make_absolute_path(HbaFileName);
3240 fname = guc_malloc(FATAL,
3241 strlen(configdir) + strlen(HBA_FILENAME) + 2);
3242 sprintf(fname, "%s/%s", configdir, HBA_FILENAME);
3246 write_stderr("%s does not know where to find the \"hba\" configuration file.\n"
3247 "This can be specified as \"hba_file\" in \"%s\", "
3248 "or by the -D invocation option, or by the "
3249 "PGDATA environment variable.\n",
3250 progname, ConfigFileName);
3253 SetConfigOption("hba_file", fname, PGC_POSTMASTER, PGC_S_OVERRIDE);
3257 * Likewise for pg_ident.conf.
3260 fname = make_absolute_path(IdentFileName);
3263 fname = guc_malloc(FATAL,
3264 strlen(configdir) + strlen(IDENT_FILENAME) + 2);
3265 sprintf(fname, "%s/%s", configdir, IDENT_FILENAME);
3269 write_stderr("%s does not know where to find the \"ident\" configuration file.\n"
3270 "This can be specified as \"ident_file\" in \"%s\", "
3271 "or by the -D invocation option, or by the "
3272 "PGDATA environment variable.\n",
3273 progname, ConfigFileName);
3276 SetConfigOption("ident_file", fname, PGC_POSTMASTER, PGC_S_OVERRIDE);
3286 * Reset all options to their saved default values (implements RESET ALL)
3289 ResetAllOptions(void)
3293 for (i = 0; i < num_guc_variables; i++)
3295 struct config_generic *gconf = guc_variables[i];
3297 /* Don't reset non-SET-able values */
3298 if (gconf->context != PGC_SUSET &&
3299 gconf->context != PGC_USERSET)
3301 /* Don't reset if special exclusion from RESET ALL */
3302 if (gconf->flags & GUC_NO_RESET_ALL)
3304 /* No need to reset if wasn't SET */
3305 if (gconf->source <= PGC_S_OVERRIDE)
3308 /* Save old value to support transaction abort */
3309 push_old_value(gconf, GUC_ACTION_SET);
3311 switch (gconf->vartype)
3315 struct config_bool *conf = (struct config_bool *) gconf;
3317 if (conf->assign_hook)
3318 if (!(*conf->assign_hook) (conf->reset_val, true,
3320 elog(ERROR, "failed to reset %s", conf->gen.name);
3321 *conf->variable = conf->reset_val;
3322 conf->gen.source = conf->gen.reset_source;
3327 struct config_int *conf = (struct config_int *) gconf;
3329 if (conf->assign_hook)
3330 if (!(*conf->assign_hook) (conf->reset_val, true,
3332 elog(ERROR, "failed to reset %s", conf->gen.name);
3333 *conf->variable = conf->reset_val;
3334 conf->gen.source = conf->gen.reset_source;
3339 struct config_real *conf = (struct config_real *) gconf;
3341 if (conf->assign_hook)
3342 if (!(*conf->assign_hook) (conf->reset_val, true,
3344 elog(ERROR, "failed to reset %s", conf->gen.name);
3345 *conf->variable = conf->reset_val;
3346 conf->gen.source = conf->gen.reset_source;
3351 struct config_string *conf = (struct config_string *) gconf;
3354 /* We need not strdup here */
3355 str = conf->reset_val;
3357 if (conf->assign_hook && str)
3361 newstr = (*conf->assign_hook) (str, true,
3364 elog(ERROR, "failed to reset %s", conf->gen.name);
3365 else if (newstr != str)
3368 * See notes in set_config_option about casting
3370 str = (char *) newstr;
3374 set_string_field(conf, conf->variable, str);
3375 conf->gen.source = conf->gen.reset_source;
3380 if (gconf->flags & GUC_REPORT)
3381 ReportGUCOption(gconf);
3388 * Push previous state during transactional assignment to a GUC variable.
3391 push_old_value(struct config_generic * gconf, GucAction action)
3395 /* If we're not inside a nest level, do nothing */
3396 if (GUCNestLevel == 0)
3399 /* Do we already have a stack entry of the current nest level? */
3400 stack = gconf->stack;
3401 if (stack && stack->nest_level >= GUCNestLevel)
3403 /* Yes, so adjust its state if necessary */
3404 Assert(stack->nest_level == GUCNestLevel);
3407 case GUC_ACTION_SET:
3408 /* SET overrides any prior action at same nest level */
3409 if (stack->state == GUC_SET_LOCAL)
3411 /* must discard old masked value */
3412 discard_stack_value(gconf, &stack->masked);
3414 stack->state = GUC_SET;
3416 case GUC_ACTION_LOCAL:
3417 if (stack->state == GUC_SET)
3419 /* SET followed by SET LOCAL, remember SET's value */
3420 set_stack_value(gconf, &stack->masked);
3421 stack->state = GUC_SET_LOCAL;
3423 /* in all other cases, no change to stack entry */
3425 case GUC_ACTION_SAVE:
3426 /* Could only have a prior SAVE of same variable */
3427 Assert(stack->state == GUC_SAVE);
3430 Assert(guc_dirty); /* must be set already */
3435 * Push a new stack entry
3437 * We keep all the stack entries in TopTransactionContext for simplicity.
3439 stack = (GucStack *) MemoryContextAllocZero(TopTransactionContext,
3442 stack->prev = gconf->stack;
3443 stack->nest_level = GUCNestLevel;
3446 case GUC_ACTION_SET:
3447 stack->state = GUC_SET;
3449 case GUC_ACTION_LOCAL:
3450 stack->state = GUC_LOCAL;
3452 case GUC_ACTION_SAVE:
3453 stack->state = GUC_SAVE;
3456 stack->source = gconf->source;
3457 set_stack_value(gconf, &stack->prior);
3459 gconf->stack = stack;
3461 /* Ensure we remember to pop at end of xact */
3467 * Do GUC processing at main transaction start.
3473 * The nest level should be 0 between transactions; if it isn't, somebody
3474 * didn't call AtEOXact_GUC, or called it with the wrong nestLevel. We
3475 * throw a warning but make no other effort to clean up.
3477 if (GUCNestLevel != 0)
3478 elog(WARNING, "GUC nest level = %d at transaction start",
3484 * Enter a new nesting level for GUC values. This is called at subtransaction
3485 * start and when entering a function that has proconfig settings. NOTE that
3486 * we must not risk error here, else subtransaction start will be unhappy.
3489 NewGUCNestLevel(void)
3491 return ++GUCNestLevel;
3495 * Do GUC processing at transaction or subtransaction commit or abort, or
3496 * when exiting a function that has proconfig settings. (The name is thus
3497 * a bit of a misnomer; perhaps it should be ExitGUCNestLevel or some such.)
3498 * During abort, we discard all GUC settings that were applied at nesting
3499 * levels >= nestLevel. nestLevel == 1 corresponds to the main transaction.
3502 AtEOXact_GUC(bool isCommit, int nestLevel)
3507 Assert(nestLevel > 0 && nestLevel <= GUCNestLevel);
3509 /* Quick exit if nothing's changed in this transaction */
3512 GUCNestLevel = nestLevel - 1;
3516 still_dirty = false;
3517 for (i = 0; i < num_guc_variables; i++)
3519 struct config_generic *gconf = guc_variables[i];
3523 * Process and pop each stack entry within the nest level. To
3524 * simplify fmgr_security_definer(), we allow failure exit from a
3525 * function-with-SET-options to be recovered at the surrounding
3526 * transaction or subtransaction abort; so there could be more than
3527 * one stack entry to pop.
3529 while ((stack = gconf->stack) != NULL &&
3530 stack->nest_level >= nestLevel)
3532 GucStack *prev = stack->prev;
3533 bool restorePrior = false;
3534 bool restoreMasked = false;
3538 * In this next bit, if we don't set either restorePrior or
3539 * restoreMasked, we must "discard" any unwanted fields of the
3540 * stack entries to avoid leaking memory. If we do set one of
3541 * those flags, unused fields will be cleaned up after restoring.
3543 if (!isCommit) /* if abort, always restore prior value */
3544 restorePrior = true;
3545 else if (stack->state == GUC_SAVE)
3546 restorePrior = true;
3547 else if (stack->nest_level == 1)
3549 /* transaction commit */
3550 if (stack->state == GUC_SET_LOCAL)
3551 restoreMasked = true;
3552 else if (stack->state == GUC_SET)
3554 /* we keep the current active value */
3555 discard_stack_value(gconf, &stack->prior);
3557 else /* must be GUC_LOCAL */
3558 restorePrior = true;
3560 else if (prev == NULL ||
3561 prev->nest_level < stack->nest_level - 1)
3563 /* decrement entry's level and do not pop it */
3564 stack->nest_level--;
3570 * We have to merge this stack entry into prev. See README for
3571 * discussion of this bit.
3573 switch (stack->state)
3576 Assert(false); /* can't get here */
3579 /* next level always becomes SET */
3580 discard_stack_value(gconf, &stack->prior);
3581 if (prev->state == GUC_SET_LOCAL)
3582 discard_stack_value(gconf, &prev->masked);
3583 prev->state = GUC_SET;
3587 if (prev->state == GUC_SET)
3589 /* LOCAL migrates down */
3590 prev->masked = stack->prior;
3591 prev->state = GUC_SET_LOCAL;
3595 /* else just forget this stack level */
3596 discard_stack_value(gconf, &stack->prior);
3601 /* prior state at this level no longer wanted */
3602 discard_stack_value(gconf, &stack->prior);
3603 /* copy down the masked state */
3604 if (prev->state == GUC_SET_LOCAL)
3605 discard_stack_value(gconf, &prev->masked);
3606 prev->masked = stack->masked;
3607 prev->state = GUC_SET_LOCAL;
3614 if (restorePrior || restoreMasked)
3616 /* Perform appropriate restoration of the stacked value */
3617 union config_var_value newvalue;
3618 GucSource newsource;
3622 newvalue = stack->masked;
3623 newsource = PGC_S_SESSION;
3627 newvalue = stack->prior;
3628 newsource = stack->source;
3631 switch (gconf->vartype)
3635 struct config_bool *conf = (struct config_bool *) gconf;
3636 bool newval = newvalue.boolval;
3638 if (*conf->variable != newval)
3640 if (conf->assign_hook)
3641 if (!(*conf->assign_hook) (newval,
3642 true, PGC_S_OVERRIDE))
3643 elog(LOG, "failed to commit %s",
3645 *conf->variable = newval;
3652 struct config_int *conf = (struct config_int *) gconf;
3653 int newval = newvalue.intval;
3655 if (*conf->variable != newval)
3657 if (conf->assign_hook)
3658 if (!(*conf->assign_hook) (newval,
3659 true, PGC_S_OVERRIDE))
3660 elog(LOG, "failed to commit %s",
3662 *conf->variable = newval;
3669 struct config_real *conf = (struct config_real *) gconf;
3670 double newval = newvalue.realval;
3672 if (*conf->variable != newval)
3674 if (conf->assign_hook)
3675 if (!(*conf->assign_hook) (newval,
3676 true, PGC_S_OVERRIDE))
3677 elog(LOG, "failed to commit %s",
3679 *conf->variable = newval;
3686 struct config_string *conf = (struct config_string *) gconf;
3687 char *newval = newvalue.stringval;
3689 if (*conf->variable != newval)
3691 if (conf->assign_hook && newval)
3695 newstr = (*conf->assign_hook) (newval, true,
3698 elog(LOG, "failed to commit %s",
3700 else if (newstr != newval)
3703 * If newval should now be freed,
3704 * it'll be taken care of below.
3706 * See notes in set_config_option
3709 newval = (char *) newstr;
3713 set_string_field(conf, conf->variable, newval);
3718 * Release stacked values if not used anymore. We
3719 * could use discard_stack_value() here, but since
3720 * we have type-specific code anyway, might as
3723 set_string_field(conf, &stack->prior.stringval, NULL);
3724 set_string_field(conf, &stack->masked.stringval, NULL);
3729 gconf->source = newsource;
3732 /* Finish popping the state stack */
3733 gconf->stack = prev;
3736 /* Report new value if we changed it */
3737 if (changed && (gconf->flags & GUC_REPORT))
3738 ReportGUCOption(gconf);
3739 } /* end of stack-popping loop */
3745 /* If there are no remaining stack entries, we can reset guc_dirty */
3746 guc_dirty = still_dirty;
3748 /* Update nesting level */
3749 GUCNestLevel = nestLevel - 1;
3754 * Start up automatic reporting of changes to variables marked GUC_REPORT.
3755 * This is executed at completion of backend startup.
3758 BeginReportingGUCOptions(void)
3763 * Don't do anything unless talking to an interactive frontend of protocol
3766 if (whereToSendOutput != DestRemote ||
3767 PG_PROTOCOL_MAJOR(FrontendProtocol) < 3)
3770 reporting_enabled = true;
3772 /* Transmit initial values of interesting variables */
3773 for (i = 0; i < num_guc_variables; i++)
3775 struct config_generic *conf = guc_variables[i];
3777 if (conf->flags & GUC_REPORT)
3778 ReportGUCOption(conf);
3783 * ReportGUCOption: if appropriate, transmit option value to frontend
3786 ReportGUCOption(struct config_generic * record)
3788 if (reporting_enabled && (record->flags & GUC_REPORT))
3790 char *val = _ShowOption(record, false);
3791 StringInfoData msgbuf;
3793 pq_beginmessage(&msgbuf, 'S');
3794 pq_sendstring(&msgbuf, record->name);
3795 pq_sendstring(&msgbuf, val);
3796 pq_endmessage(&msgbuf);
3804 * Try to interpret value as boolean value. Valid values are: true,
3805 * false, yes, no, on, off, 1, 0; as well as unique prefixes thereof.
3806 * If the string parses okay, return true, else false.
3807 * If okay and result is not NULL, return the value in *result.
3810 parse_bool(const char *value, bool *result)
3812 size_t len = strlen(value);
3814 if (pg_strncasecmp(value, "true", len) == 0)
3819 else if (pg_strncasecmp(value, "false", len) == 0)
3825 else if (pg_strncasecmp(value, "yes", len) == 0)
3830 else if (pg_strncasecmp(value, "no", len) == 0)
3836 /* 'o' is not unique enough */
3837 else if (pg_strncasecmp(value, "on", (len > 2 ? len : 2)) == 0)
3842 else if (pg_strncasecmp(value, "off", (len > 2 ? len : 2)) == 0)
3848 else if (pg_strcasecmp(value, "1") == 0)
3853 else if (pg_strcasecmp(value, "0") == 0)
3862 *result = false; /* suppress compiler warning */
3871 * Try to parse value as an integer. The accepted formats are the
3872 * usual decimal, octal, or hexadecimal formats, optionally followed by
3873 * a unit name if "flags" indicates a unit is allowed.
3875 * If the string parses okay, return true, else false.
3876 * If okay and result is not NULL, return the value in *result.
3877 * If not okay and hintmsg is not NULL, *hintmsg is set to a suitable
3878 * HINT message, or NULL if no hint provided.
3881 parse_int(const char *value, int *result, int flags, const char **hintmsg)
3886 /* To suppress compiler warnings, always set output params */
3892 /* We assume here that int64 is at least as wide as long */
3894 val = strtol(value, &endptr, 0);
3896 if (endptr == value)
3897 return false; /* no HINT for integer syntax error */
3899 if (errno == ERANGE || val != (int64) ((int32) val))
3902 *hintmsg = gettext_noop("Value exceeds integer range.");
3906 /* allow whitespace between integer and unit */
3907 while (isspace((unsigned char) *endptr))
3910 /* Handle possible unit */
3911 if (*endptr != '\0')
3914 * Note: the multiple-switch coding technique here is a bit tedious,
3915 * but seems necessary to avoid intermediate-value overflows.
3917 * If INT64_IS_BUSTED (ie, it's really int32) we will fail to detect
3918 * overflow due to units conversion, but there are few enough such
3919 * machines that it does not seem worth trying to be smarter.
3921 if (flags & GUC_UNIT_MEMORY)
3923 /* Set hint for use if no match or trailing garbage */
3925 *hintmsg = gettext_noop("Valid units for this parameter are \"kB\", \"MB\", and \"GB\".");
3927 #if BLCKSZ < 1024 || BLCKSZ > (1024*1024)
3928 #error BLCKSZ must be between 1KB and 1MB
3930 #if XLOG_BLCKSZ < 1024 || XLOG_BLCKSZ > (1024*1024)
3931 #error XLOG_BLCKSZ must be between 1KB and 1MB
3934 if (strncmp(endptr, "kB", 2) == 0)
3937 switch (flags & GUC_UNIT_MEMORY)
3939 case GUC_UNIT_BLOCKS:
3940 val /= (BLCKSZ / 1024);
3942 case GUC_UNIT_XBLOCKS:
3943 val /= (XLOG_BLCKSZ / 1024);
3947 else if (strncmp(endptr, "MB", 2) == 0)
3950 switch (flags & GUC_UNIT_MEMORY)
3955 case GUC_UNIT_BLOCKS:
3956 val *= KB_PER_MB / (BLCKSZ / 1024);
3958 case GUC_UNIT_XBLOCKS:
3959 val *= KB_PER_MB / (XLOG_BLCKSZ / 1024);
3963 else if (strncmp(endptr, "GB", 2) == 0)
3966 switch (flags & GUC_UNIT_MEMORY)
3971 case GUC_UNIT_BLOCKS:
3972 val *= KB_PER_GB / (BLCKSZ / 1024);
3974 case GUC_UNIT_XBLOCKS:
3975 val *= KB_PER_GB / (XLOG_BLCKSZ / 1024);
3980 else if (flags & GUC_UNIT_TIME)
3982 /* Set hint for use if no match or trailing garbage */
3984 *hintmsg = gettext_noop("Valid units for this parameter are \"ms\", \"s\", \"min\", \"h\", and \"d\".");
3986 if (strncmp(endptr, "ms", 2) == 0)
3989 switch (flags & GUC_UNIT_TIME)
3999 else if (strncmp(endptr, "s", 1) == 0)
4002 switch (flags & GUC_UNIT_TIME)
4012 else if (strncmp(endptr, "min", 3) == 0)
4015 switch (flags & GUC_UNIT_TIME)
4025 else if (strncmp(endptr, "h", 1) == 0)
4028 switch (flags & GUC_UNIT_TIME)
4041 else if (strncmp(endptr, "d", 1) == 0)
4044 switch (flags & GUC_UNIT_TIME)
4059 /* allow whitespace after unit */
4060 while (isspace((unsigned char) *endptr))
4063 if (*endptr != '\0')
4064 return false; /* appropriate hint, if any, already set */
4066 /* Check for overflow due to units conversion */
4067 if (val != (int64) ((int32) val))
4070 *hintmsg = gettext_noop("Value exceeds integer range.");
4076 *result = (int) val;
4083 * Try to parse value as a floating point number in the usual format.
4084 * If the string parses okay, return true, else false.
4085 * If okay and result is not NULL, return the value in *result.
4088 parse_real(const char *value, double *result)
4094 *result = 0; /* suppress compiler warning */
4097 val = strtod(value, &endptr);
4098 if (endptr == value || errno == ERANGE)
4101 /* allow whitespace after number */
4102 while (isspace((unsigned char) *endptr))
4104 if (*endptr != '\0')
4114 * Call a GucStringAssignHook function, being careful to free the
4115 * "newval" string if the hook ereports.
4117 * This is split out of set_config_option just to avoid the "volatile"
4118 * qualifiers that would otherwise have to be plastered all over.
4121 call_string_assign_hook(GucStringAssignHook assign_hook,
4122 char *newval, bool doit, GucSource source)
4128 result = (*assign_hook) (newval, doit, source);
4142 * Sets option `name' to given value. The value should be a string
4143 * which is going to be parsed and converted to the appropriate data
4144 * type. The context and source parameters indicate in which context this
4145 * function is being called so it can apply the access restrictions
4148 * If value is NULL, set the option to its default value (normally the
4149 * reset_val, but if source == PGC_S_DEFAULT we instead use the boot_val).
4151 * action indicates whether to set the value globally in the session, locally
4152 * to the current top transaction, or just for the duration of a function call.
4154 * If changeVal is false then don't really set the option but do all
4155 * the checks to see if it would work.
4157 * If there is an error (non-existing option, invalid value) then an
4158 * ereport(ERROR) is thrown *unless* this is called in a context where we
4159 * don't want to ereport (currently, startup or SIGHUP config file reread).
4160 * In that case we write a suitable error message via ereport(LOG) and
4161 * return false. This is working around the deficiencies in the ereport
4162 * mechanism, so don't blame me. In all other cases, the function
4163 * returns true, including cases where the input is valid but we chose
4164 * not to apply it because of context or source-priority considerations.
4166 * See also SetConfigOption for an external interface.
4169 set_config_option(const char *name, const char *value,
4170 GucContext context, GucSource source,
4171 GucAction action, bool changeVal)
4173 struct config_generic *record;
4177 if (context == PGC_SIGHUP || source == PGC_S_DEFAULT)
4180 * To avoid cluttering the log, only the postmaster bleats loudly
4181 * about problems with the config file.
4183 elevel = IsUnderPostmaster ? DEBUG3 : LOG;
4185 else if (source == PGC_S_DATABASE || source == PGC_S_USER)
4190 record = find_option(name, true, elevel);
4194 (errcode(ERRCODE_UNDEFINED_OBJECT),
4195 errmsg("unrecognized configuration parameter \"%s\"", name)));
4200 * If source is postgresql.conf, mark the found record with
4201 * GUC_IS_IN_FILE. This is for the convenience of ProcessConfigFile. Note
4202 * that we do it even if changeVal is false, since ProcessConfigFile wants
4203 * the marking to occur during its testing pass.
4205 if (source == PGC_S_FILE)
4206 record->status |= GUC_IS_IN_FILE;
4209 * Check if the option can be set at this time. See guc.h for the precise
4210 * rules. Note that we don't want to throw errors if we're in the SIGHUP
4211 * context. In that case we just ignore the attempt and return true.
4213 switch (record->context)
4216 if (context == PGC_SIGHUP)
4218 if (context != PGC_INTERNAL)
4221 (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
4222 errmsg("parameter \"%s\" cannot be changed",
4227 case PGC_POSTMASTER:
4228 if (context == PGC_SIGHUP)
4231 * We are reading a PGC_POSTMASTER var from postgresql.conf.
4232 * We can't change the setting, so give a warning if the DBA
4233 * tries to change it. (Throwing an error would be more
4234 * consistent, but seems overly rigid.)
4236 if (changeVal && !is_newvalue_equal(record, value))
4238 (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
4239 errmsg("parameter \"%s\" cannot be changed after server start; configuration file change ignored",
4243 if (context != PGC_POSTMASTER)
4246 (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
4247 errmsg("parameter \"%s\" cannot be changed after server start",
4253 if (context != PGC_SIGHUP && context != PGC_POSTMASTER)
4256 (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
4257 errmsg("parameter \"%s\" cannot be changed now",
4263 * Hmm, the idea of the SIGHUP context is "ought to be global, but
4264 * can be changed after postmaster start". But there's nothing
4265 * that prevents a crafty administrator from sending SIGHUP
4266 * signals to individual backends only.
4270 if (context == PGC_SIGHUP)
4273 * If a PGC_BACKEND parameter is changed in the config file,
4274 * we want to accept the new value in the postmaster (whence
4275 * it will propagate to subsequently-started backends), but
4276 * ignore it in existing backends. This is a tad klugy, but
4277 * necessary because we don't re-read the config file during
4280 if (IsUnderPostmaster)
4283 else if (context != PGC_BACKEND && context != PGC_POSTMASTER)
4286 (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
4287 errmsg("parameter \"%s\" cannot be set after connection start",
4293 if (context == PGC_USERSET || context == PGC_BACKEND)
4296 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
4297 errmsg("permission denied to set parameter \"%s\"",
4308 * Should we set reset/stacked values? (If so, the behavior is not
4309 * transactional.) This is done either when we get a default value from
4310 * the database's/user's/client's default settings or when we reset a
4311 * value to its default.
4313 makeDefault = changeVal && (source <= PGC_S_OVERRIDE) &&
4314 ((value != NULL) || source == PGC_S_DEFAULT);
4317 * Ignore attempted set if overridden by previously processed setting.
4318 * However, if changeVal is false then plow ahead anyway since we are
4319 * trying to find out if the value is potentially good, not actually use
4320 * it. Also keep going if makeDefault is true, since we may want to set
4321 * the reset/stacked values even if we can't set the variable itself.
4323 if (record->source > source)
4325 if (changeVal && !makeDefault)
4327 elog(DEBUG3, "\"%s\": setting ignored because previous source is higher priority",
4335 * Evaluate value and set variable.
4337 switch (record->vartype)
4341 struct config_bool *conf = (struct config_bool *) record;
4346 if (!parse_bool(value, &newval))
4349 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4350 errmsg("parameter \"%s\" requires a Boolean value",
4355 else if (source == PGC_S_DEFAULT)
4356 newval = conf->boot_val;
4359 newval = conf->reset_val;
4360 source = conf->gen.reset_source;
4363 if (conf->assign_hook)
4364 if (!(*conf->assign_hook) (newval, changeVal, source))
4367 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4368 errmsg("invalid value for parameter \"%s\": %d",
4369 name, (int) newval)));
4373 if (changeVal || makeDefault)
4375 /* Save old value to support transaction abort */
4377 push_old_value(&conf->gen, action);
4380 *conf->variable = newval;
4381 conf->gen.source = source;
4387 if (conf->gen.reset_source <= source)
4389 conf->reset_val = newval;
4390 conf->gen.reset_source = source;
4392 for (stack = conf->gen.stack; stack; stack = stack->prev)
4394 if (stack->source <= source)
4396 stack->prior.boolval = newval;
4397 stack->source = source;
4407 struct config_int *conf = (struct config_int *) record;
4412 const char *hintmsg;
4414 if (!parse_int(value, &newval, conf->gen.flags, &hintmsg))
4417 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4418 errmsg("invalid value for parameter \"%s\": \"%s\"",
4420 hintmsg ? errhint(hintmsg) : 0));
4423 if (newval < conf->min || newval > conf->max)
4426 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4427 errmsg("%d is outside the valid range for parameter \"%s\" (%d .. %d)",
4428 newval, name, conf->min, conf->max)));
4432 else if (source == PGC_S_DEFAULT)
4433 newval = conf->boot_val;
4436 newval = conf->reset_val;
4437 source = conf->gen.reset_source;
4440 if (conf->assign_hook)
4441 if (!(*conf->assign_hook) (newval, changeVal, source))
4444 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4445 errmsg("invalid value for parameter \"%s\": %d",
4450 if (changeVal || makeDefault)
4452 /* Save old value to support transaction abort */
4454 push_old_value(&conf->gen, action);
4457 *conf->variable = newval;
4458 conf->gen.source = source;
4464 if (conf->gen.reset_source <= source)
4466 conf->reset_val = newval;
4467 conf->gen.reset_source = source;
4469 for (stack = conf->gen.stack; stack; stack = stack->prev)
4471 if (stack->source <= source)
4473 stack->prior.intval = newval;
4474 stack->source = source;
4484 struct config_real *conf = (struct config_real *) record;
4489 if (!parse_real(value, &newval))
4492 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4493 errmsg("parameter \"%s\" requires a numeric value",
4497 if (newval < conf->min || newval > conf->max)
4500 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4501 errmsg("%g is outside the valid range for parameter \"%s\" (%g .. %g)",
4502 newval, name, conf->min, conf->max)));
4506 else if (source == PGC_S_DEFAULT)
4507 newval = conf->boot_val;
4510 newval = conf->reset_val;
4511 source = conf->gen.reset_source;
4514 if (conf->assign_hook)
4515 if (!(*conf->assign_hook) (newval, changeVal, source))
4518 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4519 errmsg("invalid value for parameter \"%s\": %g",
4524 if (changeVal || makeDefault)
4526 /* Save old value to support transaction abort */
4528 push_old_value(&conf->gen, action);
4531 *conf->variable = newval;
4532 conf->gen.source = source;
4538 if (conf->gen.reset_source <= source)
4540 conf->reset_val = newval;
4541 conf->gen.reset_source = source;
4543 for (stack = conf->gen.stack; stack; stack = stack->prev)
4545 if (stack->source <= source)
4547 stack->prior.realval = newval;
4548 stack->source = source;
4558 struct config_string *conf = (struct config_string *) record;
4563 newval = guc_strdup(elevel, value);
4568 * The only sort of "parsing" check we need to do is apply
4569 * truncation if GUC_IS_NAME.
4571 if (conf->gen.flags & GUC_IS_NAME)
4572 truncate_identifier(newval, strlen(newval), true);
4574 else if (source == PGC_S_DEFAULT)
4576 if (conf->boot_val == NULL)
4580 newval = guc_strdup(elevel, conf->boot_val);
4588 * We could possibly avoid strdup here, but easier to make
4589 * this case work the same as the normal assignment case;
4590 * note the possible free of newval below.
4592 if (conf->reset_val == NULL)
4596 newval = guc_strdup(elevel, conf->reset_val);
4600 source = conf->gen.reset_source;
4603 if (conf->assign_hook && newval)
4605 const char *hookresult;
4608 * If the hook ereports, we have to make sure we free
4609 * newval, else it will be a permanent memory leak.
4611 hookresult = call_string_assign_hook(conf->assign_hook,
4615 if (hookresult == NULL)
4619 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4620 errmsg("invalid value for parameter \"%s\": \"%s\"",
4621 name, value ? value : "")));
4624 else if (hookresult != newval)
4629 * Having to cast away const here is annoying, but the
4630 * alternative is to declare assign_hooks as returning
4631 * char*, which would mean they'd have to cast away
4632 * const, or as both taking and returning char*, which
4633 * doesn't seem attractive either --- we don't want
4634 * them to scribble on the passed str.
4636 newval = (char *) hookresult;
4640 if (changeVal || makeDefault)
4642 /* Save old value to support transaction abort */
4644 push_old_value(&conf->gen, action);
4647 set_string_field(conf, conf->variable, newval);
4648 conf->gen.source = source;
4654 if (conf->gen.reset_source <= source)
4656 set_string_field(conf, &conf->reset_val, newval);
4657 conf->gen.reset_source = source;
4659 for (stack = conf->gen.stack; stack; stack = stack->prev)
4661 if (stack->source <= source)
4663 set_string_field(conf, &stack->prior.stringval,
4665 stack->source = source;
4668 /* Perhaps we didn't install newval anywhere */
4669 if (newval && !string_field_used(conf, newval))
4679 if (changeVal && (record->flags & GUC_REPORT))
4680 ReportGUCOption(record);
4687 * Set a config option to the given value. See also set_config_option,
4688 * this is just the wrapper to be called from outside GUC. NB: this
4689 * is used only for non-transactional operations.
4692 SetConfigOption(const char *name, const char *value,
4693 GucContext context, GucSource source)
4695 (void) set_config_option(name, value, context, source,
4696 GUC_ACTION_SET, true);
4702 * Fetch the current value of the option `name'. If the option doesn't exist,
4703 * throw an ereport and don't return.
4705 * The string is *not* allocated for modification and is really only
4706 * valid until the next call to configuration related functions.
4709 GetConfigOption(const char *name)
4711 struct config_generic *record;
4712 static char buffer[256];
4714 record = find_option(name, false, ERROR);
4717 (errcode(ERRCODE_UNDEFINED_OBJECT),
4718 errmsg("unrecognized configuration parameter \"%s\"", name)));
4719 if ((record->flags & GUC_SUPERUSER_ONLY) && !superuser())
4721 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
4722 errmsg("must be superuser to examine \"%s\"", name)));
4724 switch (record->vartype)
4727 return *((struct config_bool *) record)->variable ? "on" : "off";
4730 snprintf(buffer, sizeof(buffer), "%d",
4731 *((struct config_int *) record)->variable);
4735 snprintf(buffer, sizeof(buffer), "%g",
4736 *((struct config_real *) record)->variable);
4740 return *((struct config_string *) record)->variable;
4746 * Get the RESET value associated with the given option.
4748 * Note: this is not re-entrant, due to use of static result buffer;
4749 * not to mention that a string variable could have its reset_val changed.
4750 * Beware of assuming the result value is good for very long.
4753 GetConfigOptionResetString(const char *name)
4755 struct config_generic *record;
4756 static char buffer[256];
4758 record = find_option(name, false, ERROR);
4761 (errcode(ERRCODE_UNDEFINED_OBJECT),
4762 errmsg("unrecognized configuration parameter \"%s\"", name)));
4763 if ((record->flags & GUC_SUPERUSER_ONLY) && !superuser())
4765 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
4766 errmsg("must be superuser to examine \"%s\"", name)));
4768 switch (record->vartype)
4771 return ((struct config_bool *) record)->reset_val ? "on" : "off";
4774 snprintf(buffer, sizeof(buffer), "%d",
4775 ((struct config_int *) record)->reset_val);
4779 snprintf(buffer, sizeof(buffer), "%g",
4780 ((struct config_real *) record)->reset_val);
4784 return ((struct config_string *) record)->reset_val;
4790 * Detect whether the given configuration option can only be set by
4794 IsSuperuserConfigOption(const char *name)
4796 struct config_generic *record;
4798 record = find_option(name, false, ERROR);
4799 /* On an unrecognized name, don't error, just return false. */
4802 return (record->context == PGC_SUSET);
4807 * GUC_complaint_elevel
4808 * Get the ereport error level to use in an assign_hook's error report.
4810 * This should be used by assign hooks that want to emit a custom error
4811 * report (in addition to the generic "invalid value for option FOO" that
4812 * guc.c will provide). Note that the result might be ERROR or a lower
4813 * level, so the caller must be prepared for control to return from ereport,
4814 * or not. If control does return, return false/NULL from the hook function.
4816 * At some point it'd be nice to replace this with a mechanism that allows
4817 * the custom message to become the DETAIL line of guc.c's generic message.
4820 GUC_complaint_elevel(GucSource source)
4824 if (source == PGC_S_FILE)
4827 * To avoid cluttering the log, only the postmaster bleats loudly
4828 * about problems with the config file.
4830 elevel = IsUnderPostmaster ? DEBUG3 : LOG;
4832 else if (source == PGC_S_OVERRIDE)
4835 * If we're a postmaster child, this is probably "undo" during
4836 * transaction abort, so we don't want to clutter the log. There's
4837 * a small chance of a real problem with an OVERRIDE setting,
4838 * though, so suppressing the message entirely wouldn't be desirable.
4840 elevel = IsUnderPostmaster ? DEBUG5 : LOG;
4842 else if (source < PGC_S_INTERACTIVE)
4852 * flatten_set_variable_args
4853 * Given a parsenode List as emitted by the grammar for SET,
4854 * convert to the flat string representation used by GUC.
4856 * We need to be told the name of the variable the args are for, because
4857 * the flattening rules vary (ugh).
4859 * The result is NULL if args is NIL (ie, SET ... TO DEFAULT), otherwise
4860 * a palloc'd string.
4863 flatten_set_variable_args(const char *name, List *args)
4865 struct config_generic *record;
4870 /* Fast path if just DEFAULT */
4874 /* Else get flags for the variable */
4875 record = find_option(name, true, ERROR);
4878 (errcode(ERRCODE_UNDEFINED_OBJECT),
4879 errmsg("unrecognized configuration parameter \"%s\"", name)));
4881 flags = record->flags;
4883 /* Complain if list input and non-list variable */
4884 if ((flags & GUC_LIST_INPUT) == 0 &&
4885 list_length(args) != 1)
4887 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4888 errmsg("SET %s takes only one argument", name)));
4890 initStringInfo(&buf);
4894 A_Const *arg = (A_Const *) lfirst(l);
4897 if (l != list_head(args))
4898 appendStringInfo(&buf, ", ");
4900 if (!IsA(arg, A_Const))
4901 elog(ERROR, "unrecognized node type: %d", (int) nodeTag(arg));
4903 switch (nodeTag(&arg->val))
4906 appendStringInfo(&buf, "%ld", intVal(&arg->val));
4909 /* represented as a string, so just copy it */
4910 appendStringInfoString(&buf, strVal(&arg->val));
4913 val = strVal(&arg->val);
4914 if (arg->typename != NULL)
4917 * Must be a ConstInterval argument for TIME ZONE. Coerce
4918 * to interval and back to normalize the value and account
4926 typoid = typenameTypeId(NULL, arg->typename, &typmod);
4927 Assert(typoid == INTERVALOID);
4930 DirectFunctionCall3(interval_in,
4931 CStringGetDatum(val),
4932 ObjectIdGetDatum(InvalidOid),
4933 Int32GetDatum(typmod));
4936 DatumGetCString(DirectFunctionCall1(interval_out,
4938 appendStringInfo(&buf, "INTERVAL '%s'", intervalout);
4943 * Plain string literal or identifier. For quote mode,
4944 * quote it if it's not a vanilla identifier.
4946 if (flags & GUC_LIST_QUOTE)
4947 appendStringInfoString(&buf, quote_identifier(val));
4949 appendStringInfoString(&buf, val);
4953 elog(ERROR, "unrecognized node type: %d",
4954 (int) nodeTag(&arg->val));
4967 ExecSetVariableStmt(VariableSetStmt *stmt)
4969 GucAction action = stmt->is_local ? GUC_ACTION_LOCAL : GUC_ACTION_SET;
4974 case VAR_SET_CURRENT:
4975 set_config_option(stmt->name,
4976 ExtractSetVariableArgs(stmt),
4977 (superuser() ? PGC_SUSET : PGC_USERSET),
4985 * Special case for special SQL syntax that effectively sets more
4986 * than one variable per statement.
4988 if (strcmp(stmt->name, "TRANSACTION") == 0)
4992 foreach(head, stmt->args)
4994 DefElem *item = (DefElem *) lfirst(head);
4996 if (strcmp(item->defname, "transaction_isolation") == 0)
4997 SetPGVariable("transaction_isolation",
4998 list_make1(item->arg), stmt->is_local);
4999 else if (strcmp(item->defname, "transaction_read_only") == 0)
5000 SetPGVariable("transaction_read_only",
5001 list_make1(item->arg), stmt->is_local);
5003 elog(ERROR, "unexpected SET TRANSACTION element: %s",
5007 else if (strcmp(stmt->name, "SESSION CHARACTERISTICS") == 0)
5011 foreach(head, stmt->args)
5013 DefElem *item = (DefElem *) lfirst(head);
5015 if (strcmp(item->defname, "transaction_isolation") == 0)
5016 SetPGVariable("default_transaction_isolation",
5017 list_make1(item->arg), stmt->is_local);
5018 else if (strcmp(item->defname, "transaction_read_only") == 0)
5019 SetPGVariable("default_transaction_read_only",
5020 list_make1(item->arg), stmt->is_local);
5022 elog(ERROR, "unexpected SET SESSION element: %s",
5027 elog(ERROR, "unexpected SET MULTI element: %s",
5030 case VAR_SET_DEFAULT:
5032 set_config_option(stmt->name,
5034 (superuser() ? PGC_SUSET : PGC_USERSET),
5046 * Get the value to assign for a VariableSetStmt, or NULL if it's RESET.
5047 * The result is palloc'd.
5049 * This is exported for use by actions such as ALTER ROLE SET.
5052 ExtractSetVariableArgs(VariableSetStmt *stmt)
5057 return flatten_set_variable_args(stmt->name, stmt->args);
5058 case VAR_SET_CURRENT:
5059 return GetConfigOptionByName(stmt->name, NULL);
5066 * SetPGVariable - SET command exported as an easily-C-callable function.
5068 * This provides access to SET TO value, as well as SET TO DEFAULT (expressed
5069 * by passing args == NIL), but not SET FROM CURRENT functionality.
5072 SetPGVariable(const char *name, List *args, bool is_local)
5074 char *argstring = flatten_set_variable_args(name, args);
5076 /* Note SET DEFAULT (argstring == NULL) is equivalent to RESET */
5077 set_config_option(name,
5079 (superuser() ? PGC_SUSET : PGC_USERSET),
5081 is_local ? GUC_ACTION_LOCAL : GUC_ACTION_SET,
5086 * SET command wrapped as a SQL callable function.
5089 set_config_by_name(PG_FUNCTION_ARGS)
5097 if (PG_ARGISNULL(0))
5099 (errcode(ERRCODE_NULL_VALUE_NOT_ALLOWED),
5100 errmsg("SET requires parameter name")));
5102 /* Get the GUC variable name */
5103 name = DatumGetCString(DirectFunctionCall1(textout, PG_GETARG_DATUM(0)));
5105 /* Get the desired value or set to NULL for a reset request */
5106 if (PG_ARGISNULL(1))
5109 value = DatumGetCString(DirectFunctionCall1(textout, PG_GETARG_DATUM(1)));
5112 * Get the desired state of is_local. Default to false if provided value
5115 if (PG_ARGISNULL(2))
5118 is_local = PG_GETARG_BOOL(2);
5120 /* Note SET DEFAULT (argstring == NULL) is equivalent to RESET */
5121 set_config_option(name,
5123 (superuser() ? PGC_SUSET : PGC_USERSET),
5125 is_local ? GUC_ACTION_LOCAL : GUC_ACTION_SET,
5128 /* get the new current value */
5129 new_value = GetConfigOptionByName(name, NULL);
5131 /* Convert return string to text */
5132 result_text = DatumGetTextP(DirectFunctionCall1(textin, CStringGetDatum(new_value)));
5135 PG_RETURN_TEXT_P(result_text);
5140 * Common code for DefineCustomXXXVariable subroutines: allocate the
5141 * new variable's config struct and fill in generic fields.
5143 static struct config_generic *
5144 init_custom_variable(const char *name,
5145 const char *short_desc,
5146 const char *long_desc,
5148 enum config_type type,
5151 struct config_generic *gen;
5153 gen = (struct config_generic *) guc_malloc(ERROR, sz);
5156 gen->name = guc_strdup(ERROR, name);
5157 gen->context = context;
5158 gen->group = CUSTOM_OPTIONS;
5159 gen->short_desc = short_desc;
5160 gen->long_desc = long_desc;
5161 gen->vartype = type;
5167 * Common code for DefineCustomXXXVariable subroutines: insert the new
5168 * variable into the GUC variable array, replacing any placeholder.
5171 define_custom_variable(struct config_generic * variable)
5173 const char *name = variable->name;
5174 const char **nameAddr = &name;
5176 struct config_string *pHolder;
5177 struct config_generic **res;
5179 res = (struct config_generic **) bsearch((void *) &nameAddr,
5180 (void *) guc_variables,
5182 sizeof(struct config_generic *),
5186 /* No placeholder to replace, so just add it */
5187 add_guc_variable(variable, ERROR);
5192 * This better be a placeholder
5194 if (((*res)->flags & GUC_CUSTOM_PLACEHOLDER) == 0)
5196 (errcode(ERRCODE_INTERNAL_ERROR),
5197 errmsg("attempt to redefine parameter \"%s\"", name)));
5199 Assert((*res)->vartype == PGC_STRING);
5200 pHolder = (struct config_string *) (*res);
5203 * Replace the placeholder. We aren't changing the name, so no re-sorting
5209 * Assign the string value stored in the placeholder to the real variable.
5211 * XXX this is not really good enough --- it should be a nontransactional
5212 * assignment, since we don't want it to roll back if the current xact
5215 value = *pHolder->variable;
5218 set_config_option(name, value,
5219 pHolder->gen.context, pHolder->gen.source,
5220 GUC_ACTION_SET, true);
5223 * Free up as much as we conveniently can of the placeholder structure
5224 * (this neglects any stack items...)
5226 set_string_field(pHolder, pHolder->variable, NULL);
5227 set_string_field(pHolder, &pHolder->reset_val, NULL);
5233 DefineCustomBoolVariable(const char *name,
5234 const char *short_desc,
5235 const char *long_desc,
5238 GucBoolAssignHook assign_hook,
5239 GucShowHook show_hook)
5241 struct config_bool *var;
5243 var = (struct config_bool *)
5244 init_custom_variable(name, short_desc, long_desc, context,
5245 PGC_BOOL, sizeof(struct config_bool));
5246 var->variable = valueAddr;
5247 var->boot_val = *valueAddr;
5248 var->reset_val = *valueAddr;
5249 var->assign_hook = assign_hook;
5250 var->show_hook = show_hook;
5251 define_custom_variable(&var->gen);
5255 DefineCustomIntVariable(const char *name,
5256 const char *short_desc,
5257 const char *long_desc,
5262 GucIntAssignHook assign_hook,
5263 GucShowHook show_hook)
5265 struct config_int *var;
5267 var = (struct config_int *)
5268 init_custom_variable(name, short_desc, long_desc, context,
5269 PGC_INT, sizeof(struct config_int));
5270 var->variable = valueAddr;
5271 var->boot_val = *valueAddr;
5272 var->reset_val = *valueAddr;
5273 var->min = minValue;
5274 var->max = maxValue;
5275 var->assign_hook = assign_hook;
5276 var->show_hook = show_hook;
5277 define_custom_variable(&var->gen);
5281 DefineCustomRealVariable(const char *name,
5282 const char *short_desc,
5283 const char *long_desc,
5288 GucRealAssignHook assign_hook,
5289 GucShowHook show_hook)
5291 struct config_real *var;
5293 var = (struct config_real *)
5294 init_custom_variable(name, short_desc, long_desc, context,
5295 PGC_REAL, sizeof(struct config_real));
5296 var->variable = valueAddr;
5297 var->boot_val = *valueAddr;
5298 var->reset_val = *valueAddr;
5299 var->min = minValue;
5300 var->max = maxValue;
5301 var->assign_hook = assign_hook;
5302 var->show_hook = show_hook;
5303 define_custom_variable(&var->gen);
5307 DefineCustomStringVariable(const char *name,
5308 const char *short_desc,
5309 const char *long_desc,
5312 GucStringAssignHook assign_hook,
5313 GucShowHook show_hook)
5315 struct config_string *var;
5317 var = (struct config_string *)
5318 init_custom_variable(name, short_desc, long_desc, context,
5319 PGC_STRING, sizeof(struct config_string));
5320 var->variable = valueAddr;
5321 var->boot_val = *valueAddr;
5322 /* we could probably do without strdup, but keep it like normal case */
5324 var->reset_val = guc_strdup(ERROR, var->boot_val);
5325 var->assign_hook = assign_hook;
5326 var->show_hook = show_hook;
5327 define_custom_variable(&var->gen);
5331 EmitWarningsOnPlaceholders(const char *className)
5333 struct config_generic **vars = guc_variables;
5334 struct config_generic **last = vars + num_guc_variables;
5336 int nameLen = strlen(className);
5340 struct config_generic *var = *vars++;
5342 if ((var->flags & GUC_CUSTOM_PLACEHOLDER) != 0 &&
5343 strncmp(className, var->name, nameLen) == 0 &&
5344 var->name[nameLen] == GUC_QUALIFIER_SEPARATOR)
5347 (errcode(ERRCODE_UNDEFINED_OBJECT),
5348 errmsg("unrecognized configuration parameter \"%s\"", var->name)));
5358 GetPGVariable(const char *name, DestReceiver *dest)
5360 if (guc_name_compare(name, "all") == 0)
5361 ShowAllGUCConfig(dest);
5363 ShowGUCConfigOption(name, dest);
5367 GetPGVariableResultDesc(const char *name)
5371 if (guc_name_compare(name, "all") == 0)
5373 /* need a tuple descriptor representing three TEXT columns */
5374 tupdesc = CreateTemplateTupleDesc(3, false);
5375 TupleDescInitEntry(tupdesc, (AttrNumber) 1, "name",
5377 TupleDescInitEntry(tupdesc, (AttrNumber) 2, "setting",
5379 TupleDescInitEntry(tupdesc, (AttrNumber) 3, "description",
5385 const char *varname;
5387 /* Get the canonical spelling of name */
5388 (void) GetConfigOptionByName(name, &varname);
5390 /* need a tuple descriptor representing a single TEXT column */
5391 tupdesc = CreateTemplateTupleDesc(1, false);
5392 TupleDescInitEntry(tupdesc, (AttrNumber) 1, varname,
5403 ShowGUCConfigOption(const char *name, DestReceiver *dest)
5405 TupOutputState *tstate;
5407 const char *varname;
5410 /* Get the value and canonical spelling of name */
5411 value = GetConfigOptionByName(name, &varname);
5413 /* need a tuple descriptor representing a single TEXT column */
5414 tupdesc = CreateTemplateTupleDesc(1, false);
5415 TupleDescInitEntry(tupdesc, (AttrNumber) 1, varname,
5418 /* prepare for projection of tuples */
5419 tstate = begin_tup_output_tupdesc(dest, tupdesc);
5422 do_text_output_oneline(tstate, value);
5424 end_tup_output(tstate);
5431 ShowAllGUCConfig(DestReceiver *dest)
5433 bool am_superuser = superuser();
5435 TupOutputState *tstate;
5439 /* need a tuple descriptor representing three TEXT columns */
5440 tupdesc = CreateTemplateTupleDesc(3, false);
5441 TupleDescInitEntry(tupdesc, (AttrNumber) 1, "name",
5443 TupleDescInitEntry(tupdesc, (AttrNumber) 2, "setting",
5445 TupleDescInitEntry(tupdesc, (AttrNumber) 3, "description",
5449 /* prepare for projection of tuples */
5450 tstate = begin_tup_output_tupdesc(dest, tupdesc);
5452 for (i = 0; i < num_guc_variables; i++)
5454 struct config_generic *conf = guc_variables[i];
5456 if ((conf->flags & GUC_NO_SHOW_ALL) ||
5457 ((conf->flags & GUC_SUPERUSER_ONLY) && !am_superuser))
5460 /* assign to the values array */
5461 values[0] = (char *) conf->name;
5462 values[1] = _ShowOption(conf, true);
5463 values[2] = (char *) conf->short_desc;
5465 /* send it to dest */
5466 do_tup_output(tstate, values);
5469 if (values[1] != NULL)
5473 end_tup_output(tstate);
5477 * Return GUC variable value by name; optionally return canonical
5478 * form of name. Return value is palloc'd.
5481 GetConfigOptionByName(const char *name, const char **varname)
5483 struct config_generic *record;
5485 record = find_option(name, false, ERROR);
5488 (errcode(ERRCODE_UNDEFINED_OBJECT),
5489 errmsg("unrecognized configuration parameter \"%s\"", name)));
5490 if ((record->flags & GUC_SUPERUSER_ONLY) && !superuser())
5492 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
5493 errmsg("must be superuser to examine \"%s\"", name)));
5496 *varname = record->name;
5498 return _ShowOption(record, true);
5502 * Return GUC variable value by variable number; optionally return canonical
5503 * form of name. Return value is palloc'd.
5506 GetConfigOptionByNum(int varnum, const char **values, bool *noshow)
5509 struct config_generic *conf;
5511 /* check requested variable number valid */
5512 Assert((varnum >= 0) && (varnum < num_guc_variables));
5514 conf = guc_variables[varnum];
5518 if ((conf->flags & GUC_NO_SHOW_ALL) ||
5519 ((conf->flags & GUC_SUPERUSER_ONLY) && !superuser()))
5525 /* first get the generic attributes */
5528 values[0] = conf->name;
5530 /* setting : use _ShowOption in order to avoid duplicating the logic */
5531 values[1] = _ShowOption(conf, false);
5534 if (conf->vartype == PGC_INT)
5538 switch (conf->flags & (GUC_UNIT_MEMORY | GUC_UNIT_TIME))
5543 case GUC_UNIT_BLOCKS:
5544 snprintf(buf, sizeof(buf), "%dkB", BLCKSZ / 1024);
5547 case GUC_UNIT_XBLOCKS:
5548 snprintf(buf, sizeof(buf), "%dkB", XLOG_BLCKSZ / 1024);
5569 values[3] = config_group_names[conf->group];
5572 values[4] = conf->short_desc;
5575 values[5] = conf->long_desc;
5578 values[6] = GucContext_Names[conf->context];
5581 values[7] = config_type_names[conf->vartype];
5584 values[8] = GucSource_Names[conf->source];
5586 /* now get the type specifc attributes */
5587 switch (conf->vartype)
5601 struct config_int *lconf = (struct config_int *) conf;
5604 snprintf(buffer, sizeof(buffer), "%d", lconf->min);
5605 values[9] = pstrdup(buffer);
5608 snprintf(buffer, sizeof(buffer), "%d", lconf->max);
5609 values[10] = pstrdup(buffer);
5615 struct config_real *lconf = (struct config_real *) conf;
5618 snprintf(buffer, sizeof(buffer), "%g", lconf->min);
5619 values[9] = pstrdup(buffer);
5622 snprintf(buffer, sizeof(buffer), "%g", lconf->max);
5623 values[10] = pstrdup(buffer);
5640 * should never get here, but in case we do, set 'em to NULL
5654 * Return the total number of GUC variables
5657 GetNumConfigOptions(void)
5659 return num_guc_variables;
5663 * show_config_by_name - equiv to SHOW X command but implemented as
5667 show_config_by_name(PG_FUNCTION_ARGS)
5673 /* Get the GUC variable name */
5674 varname = DatumGetCString(DirectFunctionCall1(textout, PG_GETARG_DATUM(0)));
5677 varval = GetConfigOptionByName(varname, NULL);
5679 /* Convert to text */
5680 result_text = DatumGetTextP(DirectFunctionCall1(textin, CStringGetDatum(varval)));
5683 PG_RETURN_TEXT_P(result_text);
5687 * show_all_settings - equiv to SHOW ALL command but implemented as
5690 #define NUM_PG_SETTINGS_ATTS 11
5693 show_all_settings(PG_FUNCTION_ARGS)
5695 FuncCallContext *funcctx;
5699 AttInMetadata *attinmeta;
5700 MemoryContext oldcontext;
5702 /* stuff done only on the first call of the function */
5703 if (SRF_IS_FIRSTCALL())
5705 /* create a function context for cross-call persistence */
5706 funcctx = SRF_FIRSTCALL_INIT();
5709 * switch to memory context appropriate for multiple function calls
5711 oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
5714 * need a tuple descriptor representing NUM_PG_SETTINGS_ATTS columns
5715 * of the appropriate types
5717 tupdesc = CreateTemplateTupleDesc(NUM_PG_SETTINGS_ATTS, false);
5718 TupleDescInitEntry(tupdesc, (AttrNumber) 1, "name",
5720 TupleDescInitEntry(tupdesc, (AttrNumber) 2, "setting",
5722 TupleDescInitEntry(tupdesc, (AttrNumber) 3, "unit",
5724 TupleDescInitEntry(tupdesc, (AttrNumber) 4, "category",
5726 TupleDescInitEntry(tupdesc, (AttrNumber) 5, "short_desc",
5728 TupleDescInitEntry(tupdesc, (AttrNumber) 6, "extra_desc",
5730 TupleDescInitEntry(tupdesc, (AttrNumber) 7, "context",
5732 TupleDescInitEntry(tupdesc, (AttrNumber) 8, "vartype",
5734 TupleDescInitEntry(tupdesc, (AttrNumber) 9, "source",
5736 TupleDescInitEntry(tupdesc, (AttrNumber) 10, "min_val",
5738 TupleDescInitEntry(tupdesc, (AttrNumber) 11, "max_val",
5742 * Generate attribute metadata needed later to produce tuples from raw
5745 attinmeta = TupleDescGetAttInMetadata(tupdesc);
5746 funcctx->attinmeta = attinmeta;
5748 /* total number of tuples to be returned */
5749 funcctx->max_calls = GetNumConfigOptions();
5751 MemoryContextSwitchTo(oldcontext);
5754 /* stuff done on every call of the function */
5755 funcctx = SRF_PERCALL_SETUP();
5757 call_cntr = funcctx->call_cntr;
5758 max_calls = funcctx->max_calls;
5759 attinmeta = funcctx->attinmeta;
5761 if (call_cntr < max_calls) /* do when there is more left to send */
5763 char *values[NUM_PG_SETTINGS_ATTS];
5769 * Get the next visible GUC variable name and value
5773 GetConfigOptionByNum(call_cntr, (const char **) values, &noshow);
5776 /* bump the counter and get the next config setting */
5777 call_cntr = ++funcctx->call_cntr;
5779 /* make sure we haven't gone too far now */
5780 if (call_cntr >= max_calls)
5781 SRF_RETURN_DONE(funcctx);
5786 tuple = BuildTupleFromCStrings(attinmeta, values);
5788 /* make the tuple into a datum */
5789 result = HeapTupleGetDatum(tuple);
5791 SRF_RETURN_NEXT(funcctx, result);
5795 /* do when there is no more left */
5796 SRF_RETURN_DONE(funcctx);
5801 _ShowOption(struct config_generic * record, bool use_units)
5806 switch (record->vartype)
5810 struct config_bool *conf = (struct config_bool *) record;
5812 if (conf->show_hook)
5813 val = (*conf->show_hook) ();
5815 val = *conf->variable ? "on" : "off";
5821 struct config_int *conf = (struct config_int *) record;
5823 if (conf->show_hook)
5824 val = (*conf->show_hook) ();
5828 int result = *conf->variable;
5830 if (use_units && result > 0 && (record->flags & GUC_UNIT_MEMORY))
5832 switch (record->flags & GUC_UNIT_MEMORY)
5834 case GUC_UNIT_BLOCKS:
5835 result *= BLCKSZ / 1024;
5837 case GUC_UNIT_XBLOCKS:
5838 result *= XLOG_BLCKSZ / 1024;
5842 if (result % KB_PER_GB == 0)
5844 result /= KB_PER_GB;
5847 else if (result % KB_PER_MB == 0)
5849 result /= KB_PER_MB;
5857 else if (use_units && result > 0 && (record->flags & GUC_UNIT_TIME))
5859 switch (record->flags & GUC_UNIT_TIME)
5865 result *= MS_PER_MIN;
5869 if (result % MS_PER_D == 0)
5874 else if (result % MS_PER_H == 0)
5879 else if (result % MS_PER_MIN == 0)
5881 result /= MS_PER_MIN;
5882 strcpy(unit, "min");
5884 else if (result % MS_PER_S == 0)
5897 snprintf(buffer, sizeof(buffer), "%d%s",
5898 (int) result, unit);
5906 struct config_real *conf = (struct config_real *) record;
5908 if (conf->show_hook)
5909 val = (*conf->show_hook) ();
5912 snprintf(buffer, sizeof(buffer), "%g",
5921 struct config_string *conf = (struct config_string *) record;
5923 if (conf->show_hook)
5924 val = (*conf->show_hook) ();
5925 else if (*conf->variable && **conf->variable)
5926 val = *conf->variable;
5933 /* just to keep compiler quiet */
5938 return pstrdup(val);
5943 * Attempt (badly) to detect if a proposed new GUC setting is the same
5944 * as the current value.
5946 * XXX this does not really work because it doesn't account for the
5947 * effects of canonicalization of string values by assign_hooks.
5950 is_newvalue_equal(struct config_generic * record, const char *newvalue)
5952 /* newvalue == NULL isn't supported */
5953 Assert(newvalue != NULL);
5955 switch (record->vartype)
5959 struct config_bool *conf = (struct config_bool *) record;
5962 return parse_bool(newvalue, &newval)
5963 && *conf->variable == newval;
5967 struct config_int *conf = (struct config_int *) record;
5970 return parse_int(newvalue, &newval, record->flags, NULL)
5971 && *conf->variable == newval;
5975 struct config_real *conf = (struct config_real *) record;
5978 return parse_real(newvalue, &newval)
5979 && *conf->variable == newval;
5983 struct config_string *conf = (struct config_string *) record;
5985 return *conf->variable != NULL &&
5986 strcmp(*conf->variable, newvalue) == 0;
5997 * This routine dumps out all non-default GUC options into a binary
5998 * file that is read by all exec'ed backends. The format is:
6000 * variable name, string, null terminated
6001 * variable value, string, null terminated
6002 * variable source, integer
6005 write_nondefault_variables(GucContext context)
6011 Assert(context == PGC_POSTMASTER || context == PGC_SIGHUP);
6013 elevel = (context == PGC_SIGHUP) ? LOG : ERROR;
6018 fp = AllocateFile(CONFIG_EXEC_PARAMS_NEW, "w");
6022 (errcode_for_file_access(),
6023 errmsg("could not write to file \"%s\": %m",
6024 CONFIG_EXEC_PARAMS_NEW)));
6028 for (i = 0; i < num_guc_variables; i++)
6030 struct config_generic *gconf = guc_variables[i];
6032 if (gconf->source != PGC_S_DEFAULT)
6034 fprintf(fp, "%s", gconf->name);
6037 switch (gconf->vartype)
6041 struct config_bool *conf = (struct config_bool *) gconf;
6043 if (*conf->variable == 0)
6044 fprintf(fp, "false");
6046 fprintf(fp, "true");
6052 struct config_int *conf = (struct config_int *) gconf;
6054 fprintf(fp, "%d", *conf->variable);
6060 struct config_real *conf = (struct config_real *) gconf;
6062 /* Could lose precision here? */
6063 fprintf(fp, "%f", *conf->variable);
6069 struct config_string *conf = (struct config_string *) gconf;
6071 fprintf(fp, "%s", *conf->variable);
6078 fwrite(&gconf->source, sizeof(gconf->source), 1, fp);
6085 (errcode_for_file_access(),
6086 errmsg("could not write to file \"%s\": %m",
6087 CONFIG_EXEC_PARAMS_NEW)));
6092 * Put new file in place. This could delay on Win32, but we don't hold
6093 * any exclusive locks.
6095 rename(CONFIG_EXEC_PARAMS_NEW, CONFIG_EXEC_PARAMS);
6100 * Read string, including null byte from file
6102 * Return NULL on EOF and nothing read
6105 read_string_with_null(FILE *fp)
6114 if ((ch = fgetc(fp)) == EOF)
6119 elog(FATAL, "invalid format of exec config params file");
6122 str = guc_malloc(FATAL, maxlen);
6123 else if (i == maxlen)
6124 str = guc_realloc(FATAL, str, maxlen *= 2);
6133 * This routine loads a previous postmaster dump of its non-default
6137 read_nondefault_variables(void)
6147 fp = AllocateFile(CONFIG_EXEC_PARAMS, "r");
6150 /* File not found is fine */
6151 if (errno != ENOENT)
6153 (errcode_for_file_access(),
6154 errmsg("could not read from file \"%s\": %m",
6155 CONFIG_EXEC_PARAMS)));
6161 struct config_generic *record;
6163 if ((varname = read_string_with_null(fp)) == NULL)
6166 if ((record = find_option(varname, true, FATAL)) == NULL)
6167 elog(FATAL, "failed to locate variable %s in exec config params file", varname);
6168 if ((varvalue = read_string_with_null(fp)) == NULL)
6169 elog(FATAL, "invalid format of exec config params file");
6170 if (fread(&varsource, sizeof(varsource), 1, fp) == 0)
6171 elog(FATAL, "invalid format of exec config params file");
6173 (void) set_config_option(varname, varvalue, record->context,
6174 varsource, GUC_ACTION_SET, true);
6181 #endif /* EXEC_BACKEND */
6185 * A little "long argument" simulation, although not quite GNU
6186 * compliant. Takes a string of the form "some-option=some value" and
6187 * returns name = "some_option" and value = "some value" in malloc'ed
6188 * storage. Note that '-' is converted to '_' in the option name. If
6189 * there is no '=' in the input string then value will be NULL.
6192 ParseLongOption(const char *string, char **name, char **value)
6201 equal_pos = strcspn(string, "=");
6203 if (string[equal_pos] == '=')
6205 *name = guc_malloc(FATAL, equal_pos + 1);
6206 strlcpy(*name, string, equal_pos + 1);
6208 *value = guc_strdup(FATAL, &string[equal_pos + 1]);
6212 /* no equal sign in string */
6213 *name = guc_strdup(FATAL, string);
6217 for (cp = *name; *cp; cp++)
6224 * Handle options fetched from pg_database.datconfig, pg_authid.rolconfig,
6225 * pg_proc.proconfig, etc. Caller must specify proper context/source/action.
6227 * The array parameter must be an array of TEXT (it must not be NULL).
6230 ProcessGUCArray(ArrayType *array,
6231 GucContext context, GucSource source, GucAction action)
6235 Assert(array != NULL);
6236 Assert(ARR_ELEMTYPE(array) == TEXTOID);
6237 Assert(ARR_NDIM(array) == 1);
6238 Assert(ARR_LBOUND(array)[0] == 1);
6240 for (i = 1; i <= ARR_DIMS(array)[0]; i++)
6248 d = array_ref(array, 1, &i,
6249 -1 /* varlenarray */ ,
6250 -1 /* TEXT's typlen */ ,
6251 false /* TEXT's typbyval */ ,
6252 'i' /* TEXT's typalign */ ,
6258 s = DatumGetCString(DirectFunctionCall1(textout, d));
6260 ParseLongOption(s, &name, &value);
6264 (errcode(ERRCODE_SYNTAX_ERROR),
6265 errmsg("could not parse setting for parameter \"%s\"",
6271 (void) set_config_option(name, value, context, source, action, true);
6281 * Add an entry to an option array. The array parameter may be NULL
6282 * to indicate the current table entry is NULL.
6285 GUCArrayAdd(ArrayType *array, const char *name, const char *value)
6287 const char *varname;
6295 /* test if the option is valid */
6296 set_config_option(name, value,
6297 superuser() ? PGC_SUSET : PGC_USERSET,
6298 PGC_S_TEST, GUC_ACTION_SET, false);
6300 /* convert name to canonical spelling, so we can use plain strcmp */
6301 (void) GetConfigOptionByName(name, &varname);
6304 newval = palloc(strlen(name) + 1 + strlen(value) + 1);
6305 sprintf(newval, "%s=%s", name, value);
6306 datum = DirectFunctionCall1(textin, CStringGetDatum(newval));
6314 Assert(ARR_ELEMTYPE(array) == TEXTOID);
6315 Assert(ARR_NDIM(array) == 1);
6316 Assert(ARR_LBOUND(array)[0] == 1);
6318 index = ARR_DIMS(array)[0] + 1; /* add after end */
6320 for (i = 1; i <= ARR_DIMS(array)[0]; i++)
6325 d = array_ref(array, 1, &i,
6326 -1 /* varlenarray */ ,
6327 -1 /* TEXT's typlen */ ,
6328 false /* TEXT's typbyval */ ,
6329 'i' /* TEXT's typalign */ ,
6333 current = DatumGetCString(DirectFunctionCall1(textout, d));
6334 if (strncmp(current, newval, strlen(name) + 1) == 0)
6341 a = array_set(array, 1, &index,
6344 -1 /* varlena array */ ,
6345 -1 /* TEXT's typlen */ ,
6346 false /* TEXT's typbyval */ ,
6347 'i' /* TEXT's typalign */ );
6350 a = construct_array(&datum, 1,
6359 * Delete an entry from an option array. The array parameter may be NULL
6360 * to indicate the current table entry is NULL. Also, if the return value
6361 * is NULL then a null should be stored.
6364 GUCArrayDelete(ArrayType *array, const char *name)
6366 const char *varname;
6367 ArrayType *newarray;
6373 /* test if the option is valid */
6374 set_config_option(name, NULL,
6375 superuser() ? PGC_SUSET : PGC_USERSET,
6376 PGC_S_TEST, GUC_ACTION_SET, false);
6378 /* convert name to canonical spelling, so we can use plain strcmp */
6379 (void) GetConfigOptionByName(name, &varname);
6382 /* if array is currently null, then surely nothing to delete */
6389 for (i = 1; i <= ARR_DIMS(array)[0]; i++)
6395 d = array_ref(array, 1, &i,
6396 -1 /* varlenarray */ ,
6397 -1 /* TEXT's typlen */ ,
6398 false /* TEXT's typbyval */ ,
6399 'i' /* TEXT's typalign */ ,
6403 val = DatumGetCString(DirectFunctionCall1(textout, d));
6405 /* ignore entry if it's what we want to delete */
6406 if (strncmp(val, name, strlen(name)) == 0
6407 && val[strlen(name)] == '=')
6410 /* else add it to the output array */
6413 newarray = array_set(newarray, 1, &index,
6416 -1 /* varlenarray */ ,
6417 -1 /* TEXT's typlen */ ,
6418 false /* TEXT's typbyval */ ,
6419 'i' /* TEXT's typalign */ );
6422 newarray = construct_array(&d, 1,
6434 * assign_hook and show_hook subroutines
6438 assign_log_destination(const char *value, bool doit, GucSource source)
6445 /* Need a modifiable copy of string */
6446 rawstring = pstrdup(value);
6448 /* Parse string into list of identifiers */
6449 if (!SplitIdentifierString(rawstring, ',', &elemlist))
6451 /* syntax error in list */
6453 list_free(elemlist);
6454 ereport(GUC_complaint_elevel(source),
6455 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
6456 errmsg("invalid list syntax for parameter \"log_destination\"")));
6460 foreach(l, elemlist)
6462 char *tok = (char *) lfirst(l);
6464 if (pg_strcasecmp(tok, "stderr") == 0)
6465 newlogdest |= LOG_DESTINATION_STDERR;
6466 else if (pg_strcasecmp(tok, "csvlog") == 0)
6467 newlogdest |= LOG_DESTINATION_CSVLOG;
6469 else if (pg_strcasecmp(tok, "syslog") == 0)
6470 newlogdest |= LOG_DESTINATION_SYSLOG;
6473 else if (pg_strcasecmp(tok, "eventlog") == 0)
6474 newlogdest |= LOG_DESTINATION_EVENTLOG;
6478 ereport(GUC_complaint_elevel(source),
6479 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
6480 errmsg("unrecognized \"log_destination\" key word: \"%s\"",
6483 list_free(elemlist);
6489 Log_destination = newlogdest;
6492 list_free(elemlist);
6500 assign_syslog_facility(const char *facility, bool doit, GucSource source)
6504 if (pg_strcasecmp(facility, "LOCAL0") == 0)
6505 syslog_fac = LOG_LOCAL0;
6506 else if (pg_strcasecmp(facility, "LOCAL1") == 0)
6507 syslog_fac = LOG_LOCAL1;
6508 else if (pg_strcasecmp(facility, "LOCAL2") == 0)
6509 syslog_fac = LOG_LOCAL2;
6510 else if (pg_strcasecmp(facility, "LOCAL3") == 0)
6511 syslog_fac = LOG_LOCAL3;
6512 else if (pg_strcasecmp(facility, "LOCAL4") == 0)
6513 syslog_fac = LOG_LOCAL4;
6514 else if (pg_strcasecmp(facility, "LOCAL5") == 0)
6515 syslog_fac = LOG_LOCAL5;
6516 else if (pg_strcasecmp(facility, "LOCAL6") == 0)
6517 syslog_fac = LOG_LOCAL6;
6518 else if (pg_strcasecmp(facility, "LOCAL7") == 0)
6519 syslog_fac = LOG_LOCAL7;
6521 return NULL; /* reject */
6525 syslog_facility = syslog_fac;
6526 set_syslog_parameters(syslog_ident_str ? syslog_ident_str : "postgres",
6534 assign_syslog_ident(const char *ident, bool doit, GucSource source)
6537 set_syslog_parameters(ident, syslog_facility);
6541 #endif /* HAVE_SYSLOG */
6545 assign_defaultxactisolevel(const char *newval, bool doit, GucSource source)
6547 if (pg_strcasecmp(newval, "serializable") == 0)
6550 DefaultXactIsoLevel = XACT_SERIALIZABLE;
6552 else if (pg_strcasecmp(newval, "repeatable read") == 0)
6555 DefaultXactIsoLevel = XACT_REPEATABLE_READ;
6557 else if (pg_strcasecmp(newval, "read committed") == 0)
6560 DefaultXactIsoLevel = XACT_READ_COMMITTED;
6562 else if (pg_strcasecmp(newval, "read uncommitted") == 0)
6565 DefaultXactIsoLevel = XACT_READ_UNCOMMITTED;
6573 assign_session_replication_role(const char *newval, bool doit, GucSource source)
6577 if (pg_strcasecmp(newval, "origin") == 0)
6578 newrole = SESSION_REPLICATION_ROLE_ORIGIN;
6579 else if (pg_strcasecmp(newval, "replica") == 0)
6580 newrole = SESSION_REPLICATION_ROLE_REPLICA;
6581 else if (pg_strcasecmp(newval, "local") == 0)
6582 newrole = SESSION_REPLICATION_ROLE_LOCAL;
6587 * Must flush the plan cache when changing replication role; but don't
6588 * flush unnecessarily.
6590 if (doit && SessionReplicationRole != newrole)
6593 SessionReplicationRole = newrole;
6600 assign_log_min_messages(const char *newval, bool doit, GucSource source)
6602 return (assign_msglvl(&log_min_messages, newval, doit, source));
6606 assign_client_min_messages(const char *newval, bool doit, GucSource source)
6608 return (assign_msglvl(&client_min_messages, newval, doit, source));
6612 assign_min_error_statement(const char *newval, bool doit, GucSource source)
6614 return (assign_msglvl(&log_min_error_statement, newval, doit, source));
6618 assign_msglvl(int *var, const char *newval, bool doit, GucSource source)
6620 if (pg_strcasecmp(newval, "debug") == 0)
6625 else if (pg_strcasecmp(newval, "debug5") == 0)
6630 else if (pg_strcasecmp(newval, "debug4") == 0)
6635 else if (pg_strcasecmp(newval, "debug3") == 0)
6640 else if (pg_strcasecmp(newval, "debug2") == 0)
6645 else if (pg_strcasecmp(newval, "debug1") == 0)
6650 else if (pg_strcasecmp(newval, "log") == 0)
6657 * Client_min_messages always prints 'info', but we allow it as a value
6660 else if (pg_strcasecmp(newval, "info") == 0)
6665 else if (pg_strcasecmp(newval, "notice") == 0)
6670 else if (pg_strcasecmp(newval, "warning") == 0)
6675 else if (pg_strcasecmp(newval, "error") == 0)
6680 /* We allow FATAL/PANIC for client-side messages too. */
6681 else if (pg_strcasecmp(newval, "fatal") == 0)
6686 else if (pg_strcasecmp(newval, "panic") == 0)
6692 return NULL; /* fail */
6693 return newval; /* OK */
6697 assign_log_error_verbosity(const char *newval, bool doit, GucSource source)
6699 if (pg_strcasecmp(newval, "terse") == 0)
6702 Log_error_verbosity = PGERROR_TERSE;
6704 else if (pg_strcasecmp(newval, "default") == 0)
6707 Log_error_verbosity = PGERROR_DEFAULT;
6709 else if (pg_strcasecmp(newval, "verbose") == 0)
6712 Log_error_verbosity = PGERROR_VERBOSE;
6715 return NULL; /* fail */
6716 return newval; /* OK */
6720 assign_log_statement(const char *newval, bool doit, GucSource source)
6722 if (pg_strcasecmp(newval, "none") == 0)
6725 log_statement = LOGSTMT_NONE;
6727 else if (pg_strcasecmp(newval, "ddl") == 0)
6730 log_statement = LOGSTMT_DDL;
6732 else if (pg_strcasecmp(newval, "mod") == 0)
6735 log_statement = LOGSTMT_MOD;
6737 else if (pg_strcasecmp(newval, "all") == 0)
6740 log_statement = LOGSTMT_ALL;
6743 return NULL; /* fail */
6744 return newval; /* OK */
6748 show_num_temp_buffers(void)
6751 * We show the GUC var until local buffers have been initialized, and
6752 * NLocBuffer afterwards.
6754 static char nbuf[32];
6756 sprintf(nbuf, "%d", NLocBuffer ? NLocBuffer : num_temp_buffers);
6761 assign_phony_autocommit(bool newval, bool doit, GucSource source)
6765 ereport(GUC_complaint_elevel(source),
6766 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
6767 errmsg("SET AUTOCOMMIT TO OFF is no longer supported")));
6774 assign_custom_variable_classes(const char *newval, bool doit, GucSource source)
6777 * Check syntax. newval must be a comma separated list of identifiers.
6778 * Whitespace is allowed but removed from the result.
6780 bool hasSpaceAfterToken = false;
6781 const char *cp = newval;
6786 initStringInfo(&buf);
6787 while ((c = *cp++) != '\0')
6789 if (isspace((unsigned char) c))
6792 hasSpaceAfterToken = true;
6798 if (symLen > 0) /* terminate identifier */
6800 appendStringInfoChar(&buf, ',');
6803 hasSpaceAfterToken = false;
6807 if (hasSpaceAfterToken || !isalnum((unsigned char) c))
6810 * Syntax error due to token following space after token or non
6811 * alpha numeric character
6816 appendStringInfoChar(&buf, c);
6820 /* Remove stray ',' at end */
6821 if (symLen == 0 && buf.len > 0)
6822 buf.data[--buf.len] = '\0';
6824 /* GUC wants the result malloc'd */
6825 newval = guc_strdup(LOG, buf.data);
6832 assign_debug_assertions(bool newval, bool doit, GucSource source)
6834 #ifndef USE_ASSERT_CHECKING
6837 ereport(GUC_complaint_elevel(source),
6838 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
6839 errmsg("assertion checking is not supported by this build")));
6847 assign_ssl(bool newval, bool doit, GucSource source)
6852 ereport(GUC_complaint_elevel(source),
6853 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
6854 errmsg("SSL is not supported by this build")));
6862 assign_stage_log_stats(bool newval, bool doit, GucSource source)
6864 if (newval && log_statement_stats)
6866 ereport(GUC_complaint_elevel(source),
6867 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
6868 errmsg("cannot enable parameter when \"log_statement_stats\" is true")));
6869 /* source == PGC_S_OVERRIDE means do it anyway, eg at xact abort */
6870 if (source != PGC_S_OVERRIDE)
6877 assign_log_stats(bool newval, bool doit, GucSource source)
6880 (log_parser_stats || log_planner_stats || log_executor_stats))
6882 ereport(GUC_complaint_elevel(source),
6883 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
6884 errmsg("cannot enable \"log_statement_stats\" when "
6885 "\"log_parser_stats\", \"log_planner_stats\", "
6886 "or \"log_executor_stats\" is true")));
6887 /* source == PGC_S_OVERRIDE means do it anyway, eg at xact abort */
6888 if (source != PGC_S_OVERRIDE)
6895 assign_transaction_read_only(bool newval, bool doit, GucSource source)
6897 /* Can't go to r/w mode inside a r/o transaction */
6898 if (newval == false && XactReadOnly && IsSubTransaction())
6900 ereport(GUC_complaint_elevel(source),
6901 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
6902 errmsg("cannot set transaction read-write mode inside a read-only transaction")));
6903 /* source == PGC_S_OVERRIDE means do it anyway, eg at xact abort */
6904 if (source != PGC_S_OVERRIDE)
6911 assign_canonical_path(const char *newval, bool doit, GucSource source)
6915 char *canon_val = guc_strdup(ERROR, newval);
6917 canonicalize_path(canon_val);
6925 assign_backslash_quote(const char *newval, bool doit, GucSource source)
6927 BackslashQuoteType bq;
6931 * Although only "on", "off", and "safe_encoding" are documented, we use
6932 * parse_bool so we can accept all the likely variants of "on" and "off".
6934 if (pg_strcasecmp(newval, "safe_encoding") == 0)
6935 bq = BACKSLASH_QUOTE_SAFE_ENCODING;
6936 else if (parse_bool(newval, &bqbool))
6938 bq = bqbool ? BACKSLASH_QUOTE_ON : BACKSLASH_QUOTE_OFF;
6941 return NULL; /* reject */
6944 backslash_quote = bq;
6950 assign_timezone_abbreviations(const char *newval, bool doit, GucSource source)
6953 * The powerup value shown above for timezone_abbreviations is "UNKNOWN".
6954 * When we see this we just do nothing. If this value isn't overridden
6955 * from the config file then pg_timezone_abbrev_initialize() will
6956 * eventually replace it with "Default". This hack has two purposes: to
6957 * avoid wasting cycles loading values that might soon be overridden from
6958 * the config file, and to avoid trying to read the timezone abbrev files
6959 * during InitializeGUCOptions(). The latter doesn't work in an
6960 * EXEC_BACKEND subprocess because my_exec_path hasn't been set yet and so
6961 * we can't locate PGSHAREDIR. (Essentially the same hack is used to
6962 * delay initializing TimeZone ... if we have any more, we should try to
6963 * clean up and centralize this mechanism ...)
6965 if (strcmp(newval, "UNKNOWN") == 0)
6970 /* Loading abbrev file is expensive, so only do it when value changes */
6971 if (timezone_abbreviations_string == NULL ||
6972 strcmp(timezone_abbreviations_string, newval) != 0)
6977 * If reading config file, only the postmaster should bleat loudly
6978 * about problems. Otherwise, it's just this one process doing it,
6979 * and we use WARNING message level.
6981 if (source == PGC_S_FILE)
6982 elevel = IsUnderPostmaster ? DEBUG3 : LOG;
6985 if (!load_tzoffsets(newval, doit, elevel))
6992 * pg_timezone_abbrev_initialize --- set default value if not done already
6994 * This is called after initial loading of postgresql.conf. If no
6995 * timezone_abbreviations setting was found therein, select default.
6998 pg_timezone_abbrev_initialize(void)
7000 if (strcmp(timezone_abbreviations_string, "UNKNOWN") == 0)
7002 SetConfigOption("timezone_abbreviations", "Default",
7003 PGC_POSTMASTER, PGC_S_ARGV);
7008 assign_xmlbinary(const char *newval, bool doit, GucSource source)
7012 if (pg_strcasecmp(newval, "base64") == 0)
7013 xb = XMLBINARY_BASE64;
7014 else if (pg_strcasecmp(newval, "hex") == 0)
7017 return NULL; /* reject */
7026 assign_xmloption(const char *newval, bool doit, GucSource source)
7030 if (pg_strcasecmp(newval, "document") == 0)
7031 xo = XMLOPTION_DOCUMENT;
7032 else if (pg_strcasecmp(newval, "content") == 0)
7033 xo = XMLOPTION_CONTENT;
7035 return NULL; /* reject */
7044 show_archive_command(void)
7046 if (XLogArchiveMode)
7047 return XLogArchiveCommand;
7049 return "(disabled)";
7053 assign_tcp_keepalives_idle(int newval, bool doit, GucSource source)
7056 return (pq_setkeepalivesidle(newval, MyProcPort) == STATUS_OK);
7062 show_tcp_keepalives_idle(void)
7064 static char nbuf[16];
7066 snprintf(nbuf, sizeof(nbuf), "%d", pq_getkeepalivesidle(MyProcPort));
7071 assign_tcp_keepalives_interval(int newval, bool doit, GucSource source)
7074 return (pq_setkeepalivesinterval(newval, MyProcPort) == STATUS_OK);
7080 show_tcp_keepalives_interval(void)
7082 static char nbuf[16];
7084 snprintf(nbuf, sizeof(nbuf), "%d", pq_getkeepalivesinterval(MyProcPort));
7089 assign_tcp_keepalives_count(int newval, bool doit, GucSource source)
7092 return (pq_setkeepalivescount(newval, MyProcPort) == STATUS_OK);
7098 show_tcp_keepalives_count(void)
7100 static char nbuf[16];
7102 snprintf(nbuf, sizeof(nbuf), "%d", pq_getkeepalivescount(MyProcPort));
7107 assign_maxconnections(int newval, bool doit, GucSource source)
7109 if (newval + autovacuum_max_workers > INT_MAX / 4)
7113 MaxBackends = newval + autovacuum_max_workers;
7119 assign_autovacuum_max_workers(int newval, bool doit, GucSource source)
7121 if (newval + MaxConnections > INT_MAX / 4)
7125 MaxBackends = newval + MaxConnections;
7130 #include "guc-file.c"