* do instructions or hints to the planner using C-style block comments
* of the SQL.
*
- * Copyright (c) 2012-2014, NIPPON TELEGRAPH AND TELEPHONE CORPORATION
+ * Copyright (c) 2012-2019, NIPPON TELEGRAPH AND TELEPHONE CORPORATION
*
*-------------------------------------------------------------------------
*/
#include "mb/pg_wchar.h"
#include "miscadmin.h"
#include "nodes/nodeFuncs.h"
+#include "nodes/params.h"
#include "optimizer/clauses.h"
#include "optimizer/cost.h"
#include "optimizer/geqo.h"
#include "optimizer/planner.h"
#include "optimizer/prep.h"
#include "optimizer/restrictinfo.h"
+#include "parser/analyze.h"
#include "parser/scansup.h"
#include "tcop/utility.h"
#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "utils/memutils.h"
#include "utils/rel.h"
+#include "utils/snapmgr.h"
#include "utils/syscache.h"
+#include "utils/resowner.h"
#include "catalog/pg_class.h"
#include "executor/spi.h"
#include "catalog/pg_type.h"
-/*
- * We have our own header file "plpgsql-9.1", which is necessary to support
- * hints for queries in PL/pgSQL blocks, in pg_hint_plan source package,
- * because PostgreSQL 9.1 doesn't provide the header file as a part of
- * installation. This header file is a copy of src/pl/plpgsql/src/plpgsql.h in
- * PostgreSQL 9.1.9 source tree,
- *
- * On the other hand, 9.2 installation provides that header file for external
- * modules, so we include the header in ordinary place.
- */
#include "plpgsql.h"
/* partially copied from pg_stat_statements */
#define HINT_INDEXONLYSCANREGEXP "IndexOnlyScanRegexp"
#define HINT_NOINDEXONLYSCAN "NoIndexOnlyScan"
#define HINT_NESTLOOP "NestLoop"
-#define HINT_NESTLOOP_NM "NestLoop_NM"
#define HINT_MERGEJOIN "MergeJoin"
#define HINT_HASHJOIN "HashJoin"
#define HINT_NONESTLOOP "NoNestLoop"
#define HINT_ARRAY_DEFAULT_INITSIZE 8
-#define hint_ereport(str, detail) \
- ereport(pg_hint_plan_parse_messages, \
- (errmsg("hint syntax error at or near \"%s\"", (str)), \
- errdetail detail))
+#define hint_ereport(str, detail) hint_parse_ereport(str, detail)
+#define hint_parse_ereport(str, detail) \
+ do { \
+ ereport(pg_hint_plan_parse_message_level, \
+ (errmsg("pg_hint_plan: hint syntax error at or near \"%s\"", (str)), \
+ errdetail detail)); \
+ } while(0)
#define skip_space(str) \
while (isspace(*str)) \
{
ENABLE_NESTLOOP = 0x01,
ENABLE_MERGEJOIN = 0x02,
- ENABLE_HASHJOIN = 0x04,
- ENABLE_MATERIALIZE = 0x08
+ ENABLE_HASHJOIN = 0x04
} JOIN_TYPE_BITS;
#define ENABLE_ALL_SCAN (ENABLE_SEQSCAN | ENABLE_INDEXSCAN | \
ENABLE_BITMAPSCAN | ENABLE_TIDSCAN | \
ENABLE_INDEXONLYSCAN)
-#define ENABLE_ALL_JOIN (ENABLE_NESTLOOP | ENABLE_MERGEJOIN | ENABLE_HASHJOIN |\
- ENABLE_MATERIALIZE)
+#define ENABLE_ALL_JOIN (ENABLE_NESTLOOP | ENABLE_MERGEJOIN | ENABLE_HASHJOIN)
#define DISABLE_ALL_SCAN 0
#define DISABLE_ALL_JOIN 0
HINT_KEYWORD_INDEXONLYSCANREGEXP,
HINT_KEYWORD_NOINDEXONLYSCAN,
HINT_KEYWORD_NESTLOOP,
- HINT_KEYWORD_NESTLOOP_NM,
HINT_KEYWORD_MERGEJOIN,
HINT_KEYWORD_HASHJOIN,
HINT_KEYWORD_NONESTLOOP,
const char *keyword,
HintKeyword hint_keyword);
typedef void (*HintDeleteFunction) (Hint *hint);
-typedef void (*HintDescFunction) (Hint *hint, StringInfo buf);
+typedef void (*HintDescFunction) (Hint *hint, StringInfo buf, bool nolf);
typedef int (*HintCmpFunction) (const Hint *a, const Hint *b);
typedef const char *(*HintParseFunction) (Hint *hint, HintState *hstate,
Query *parse, const char *str);
#define hint_state_enabled(hint) ((hint)->base.state == HINT_STATE_NOTUSED || \
(hint)->base.state == HINT_STATE_USED)
+static unsigned int qno = 0;
+static unsigned int msgqno = 0;
+static char qnostr[32];
+static const char *current_hint_str = NULL;
+
+/*
+ * However we usually take a hint stirng in post_parse_analyze_hook, we still
+ * need to do so in planner_hook when client starts query execution from the
+ * bind message on a prepared query. This variable prevent duplicate and
+ * sometimes harmful hint string retrieval.
+ */
+static bool current_hint_retrieved = false;
+
/* common data for all hints. */
struct Hint
{
unsigned char enforce_mask;
Relids joinrelids;
Relids inner_joinrelids;
- bool inhibit_materialize;
} JoinMethodHint;
/* join order hints */
/* for scan method hints */
ScanMethodHint **scan_hints; /* parsed scan hints */
int init_scan_mask; /* initial value scan parameter */
+ PlannerInfo *current_root; /* PlannerInfo for the followings */
Index parent_relid; /* inherit parent table relid */
ScanMethodHint *parent_hint; /* inherit parent table scan hint */
List *parent_index_infos; /* information of inherit parent table's
static void push_hint(HintState *hstate);
static void pop_hint(void);
+static void pg_hint_plan_post_parse_analyze(ParseState *pstate, Query *query);
static void pg_hint_plan_ProcessUtility(Node *parsetree,
- const char *queryString,
- ProcessUtilityContext context,
- ParamListInfo params,
- DestReceiver *dest, char *completionTag);
+ const char *queryString,
+ ProcessUtilityContext context, ParamListInfo params,
+ DestReceiver *dest, char *completionTag);
static PlannedStmt *pg_hint_plan_planner(Query *parse, int cursorOptions,
ParamListInfo boundParams);
static void pg_hint_plan_get_relation_info(PlannerInfo *root,
static Hint *ScanMethodHintCreate(const char *hint_str, const char *keyword,
HintKeyword hint_keyword);
static void ScanMethodHintDelete(ScanMethodHint *hint);
-static void ScanMethodHintDesc(ScanMethodHint *hint, StringInfo buf);
+static void ScanMethodHintDesc(ScanMethodHint *hint, StringInfo buf, bool nolf);
static int ScanMethodHintCmp(const ScanMethodHint *a, const ScanMethodHint *b);
static const char *ScanMethodHintParse(ScanMethodHint *hint, HintState *hstate,
Query *parse, const char *str);
static Hint *JoinMethodHintCreate(const char *hint_str, const char *keyword,
HintKeyword hint_keyword);
static void JoinMethodHintDelete(JoinMethodHint *hint);
-static void JoinMethodHintDesc(JoinMethodHint *hint, StringInfo buf);
+static void JoinMethodHintDesc(JoinMethodHint *hint, StringInfo buf, bool nolf);
static int JoinMethodHintCmp(const JoinMethodHint *a, const JoinMethodHint *b);
static const char *JoinMethodHintParse(JoinMethodHint *hint, HintState *hstate,
Query *parse, const char *str);
static Hint *LeadingHintCreate(const char *hint_str, const char *keyword,
HintKeyword hint_keyword);
static void LeadingHintDelete(LeadingHint *hint);
-static void LeadingHintDesc(LeadingHint *hint, StringInfo buf);
+static void LeadingHintDesc(LeadingHint *hint, StringInfo buf, bool nolf);
static int LeadingHintCmp(const LeadingHint *a, const LeadingHint *b);
static const char *LeadingHintParse(LeadingHint *hint, HintState *hstate,
Query *parse, const char *str);
static Hint *SetHintCreate(const char *hint_str, const char *keyword,
HintKeyword hint_keyword);
static void SetHintDelete(SetHint *hint);
-static void SetHintDesc(SetHint *hint, StringInfo buf);
+static void SetHintDesc(SetHint *hint, StringInfo buf, bool nolf);
static int SetHintCmp(const SetHint *a, const SetHint *b);
static const char *SetHintParse(SetHint *hint, HintState *hstate, Query *parse,
const char *str);
static Hint *RowsHintCreate(const char *hint_str, const char *keyword,
HintKeyword hint_keyword);
static void RowsHintDelete(RowsHint *hint);
-static void RowsHintDesc(RowsHint *hint, StringInfo buf);
+static void RowsHintDesc(RowsHint *hint, StringInfo buf, bool nolf);
static int RowsHintCmp(const RowsHint *a, const RowsHint *b);
static const char *RowsHintParse(RowsHint *hint, HintState *hstate,
Query *parse, const char *str);
PLpgSQL_stmt *stmt);
static void pg_hint_plan_plpgsql_stmt_end(PLpgSQL_execstate *estate,
PLpgSQL_stmt *stmt);
+static void plpgsql_query_erase_callback(ResourceReleasePhase phase,
+ bool isCommit,
+ bool isTopLevel,
+ void *arg);
/* GUC variables */
static bool pg_hint_plan_enable_hint = true;
-static bool pg_hint_plan_debug_print = false;
-static int pg_hint_plan_parse_messages = INFO;
+static int debug_level = 0;
+static int pg_hint_plan_parse_message_level = INFO;
+static int pg_hint_plan_debug_message_level = LOG;
/* Default is off, to keep backward compatibility. */
static bool pg_hint_plan_enable_hint_table = false;
+static int plpgsql_recurse_level = 0; /* PLpgSQL recursion level */
+static int recurse_level = 0; /* recursion level incl. direct SPI calls */
+static int hint_inhibit_level = 0; /* Inhibit hinting if this is above 0 */
+ /* (This could not be above 1) */
+
static const struct config_enum_entry parse_messages_level_options[] = {
{"debug", DEBUG2, true},
{"debug5", DEBUG5, false},
{NULL, 0, false}
};
+static const struct config_enum_entry parse_debug_level_options[] = {
+ {"off", 0, false},
+ {"on", 1, false},
+ {"detailed", 2, false},
+ {"verbose", 3, false},
+ {"0", 0, true},
+ {"1", 1, true},
+ {"2", 2, true},
+ {"3", 3, true},
+ {"no", 0, true},
+ {"yes", 1, true},
+ {"false", 0, true},
+ {"true", 1, true},
+ {NULL, 0, false}
+};
+
/* Saved hook values in case of unload */
-static ProcessUtility_hook_type prev_ProcessUtility = NULL;
+static post_parse_analyze_hook_type prev_post_parse_analyze_hook = NULL;
static planner_hook_type prev_planner = NULL;
static get_relation_info_hook_type prev_get_relation_info = NULL;
static join_search_hook_type prev_join_search = NULL;
+static ProcessUtility_hook_type prev_ProcessUtility_hook = NULL;
/* Hold reference to currently active hint */
static HintState *current_hint = NULL;
*/
static List *HintStateStack = NIL;
-/*
- * Holds statement name during executing EXECUTE command. NULL for other
- * statements.
- */
-static char *stmt_name = NULL;
-
static const HintParser parsers[] = {
{HINT_SEQSCAN, ScanMethodHintCreate, HINT_KEYWORD_SEQSCAN},
{HINT_INDEXSCAN, ScanMethodHintCreate, HINT_KEYWORD_INDEXSCAN},
HINT_KEYWORD_INDEXONLYSCANREGEXP},
{HINT_NOINDEXONLYSCAN, ScanMethodHintCreate, HINT_KEYWORD_NOINDEXONLYSCAN},
{HINT_NESTLOOP, JoinMethodHintCreate, HINT_KEYWORD_NESTLOOP},
- {HINT_NESTLOOP_NM, JoinMethodHintCreate, HINT_KEYWORD_NESTLOOP_NM},
{HINT_MERGEJOIN, JoinMethodHintCreate, HINT_KEYWORD_MERGEJOIN},
{HINT_HASHJOIN, JoinMethodHintCreate, HINT_KEYWORD_HASHJOIN},
{HINT_NONESTLOOP, JoinMethodHintCreate, HINT_KEYWORD_NONESTLOOP},
{NULL, NULL, HINT_KEYWORD_UNRECOGNIZED}
};
-/*
- * PL/pgSQL plugin for retrieving string representation of each query during
- * function execution.
- */
-const char *plpgsql_query_string = NULL;
PLpgSQL_plugin plugin_funcs = {
NULL,
NULL,
NULL,
};
-/* Current nesting depth of SPI calls, used to prevent recursive calls */
-static int nested_level = 0;
-
/*
* Module load callbacks
*/
NULL,
&pg_hint_plan_enable_hint,
true,
- PGC_USERSET,
+ PGC_USERSET,
0,
NULL,
NULL,
NULL);
- DefineCustomBoolVariable("pg_hint_plan.debug_print",
+ DefineCustomEnumVariable("pg_hint_plan.debug_print",
"Logs results of hint parsing.",
NULL,
- &pg_hint_plan_debug_print,
+ &debug_level,
false,
+ parse_debug_level_options,
PGC_USERSET,
0,
NULL,
DefineCustomEnumVariable("pg_hint_plan.parse_messages",
"Message level of parse errors.",
NULL,
- &pg_hint_plan_parse_messages,
+ &pg_hint_plan_parse_message_level,
INFO,
parse_messages_level_options,
PGC_USERSET,
NULL,
NULL);
+ DefineCustomEnumVariable("pg_hint_plan.message_level",
+ "Message level of debug messages.",
+ NULL,
+ &pg_hint_plan_debug_message_level,
+ LOG,
+ parse_messages_level_options,
+ PGC_USERSET,
+ 0,
+ NULL,
+ NULL,
+ NULL);
+
DefineCustomBoolVariable("pg_hint_plan.enable_hint_table",
"Force planner to not get hint by using table lookups.",
NULL,
NULL);
/* Install hooks. */
- prev_ProcessUtility = ProcessUtility_hook;
- ProcessUtility_hook = pg_hint_plan_ProcessUtility;
+ prev_post_parse_analyze_hook = post_parse_analyze_hook;
+ post_parse_analyze_hook = pg_hint_plan_post_parse_analyze;
prev_planner = planner_hook;
planner_hook = pg_hint_plan_planner;
prev_get_relation_info = get_relation_info_hook;
get_relation_info_hook = pg_hint_plan_get_relation_info;
prev_join_search = join_search_hook;
join_search_hook = pg_hint_plan_join_search;
+ prev_ProcessUtility_hook = ProcessUtility_hook;
+ ProcessUtility_hook = pg_hint_plan_ProcessUtility;
/* setup PL/pgSQL plugin hook */
var_ptr = (PLpgSQL_plugin **) find_rendezvous_variable("PLpgSQL_plugin");
*var_ptr = &plugin_funcs;
+
+ RegisterResourceReleaseCallback(plpgsql_query_erase_callback, NULL);
}
/*
PLpgSQL_plugin **var_ptr;
/* Uninstall hooks. */
- ProcessUtility_hook = prev_ProcessUtility;
+ post_parse_analyze_hook = prev_post_parse_analyze_hook;
planner_hook = prev_planner;
get_relation_info_hook = prev_get_relation_info;
join_search_hook = prev_join_search;
+ ProcessUtility_hook = prev_ProcessUtility_hook;
/* uninstall PL/pgSQL plugin hook */
var_ptr = (PLpgSQL_plugin **) find_rendezvous_variable("PLpgSQL_plugin");
hint->enforce_mask = 0;
hint->joinrelids = NULL;
hint->inner_joinrelids = NULL;
- hint->inhibit_materialize = false;
return (Hint *) hint;
}
memset(hstate->num_hints, 0, sizeof(hstate->num_hints));
hstate->scan_hints = NULL;
hstate->init_scan_mask = 0;
+ hstate->current_root = NULL;
hstate->parent_relid = 0;
hstate->parent_hint = NULL;
hstate->parent_index_infos = NIL;
}
static void
-ScanMethodHintDesc(ScanMethodHint *hint, StringInfo buf)
+ScanMethodHintDesc(ScanMethodHint *hint, StringInfo buf, bool nolf)
{
ListCell *l;
quote_value(buf, (char *) lfirst(l));
}
}
- appendStringInfoString(buf, ")\n");
+ appendStringInfoString(buf, ")");
+ if (!nolf)
+ appendStringInfoChar(buf, '\n');
}
static void
-JoinMethodHintDesc(JoinMethodHint *hint, StringInfo buf)
+JoinMethodHintDesc(JoinMethodHint *hint, StringInfo buf, bool nolf)
{
int i;
quote_value(buf, hint->relnames[i]);
}
}
- appendStringInfoString(buf, ")\n");
-
+ appendStringInfoString(buf, ")");
+ if (!nolf)
+ appendStringInfoChar(buf, '\n');
}
static void
}
static void
-LeadingHintDesc(LeadingHint *hint, StringInfo buf)
+LeadingHintDesc(LeadingHint *hint, StringInfo buf, bool nolf)
{
appendStringInfo(buf, "%s(", HINT_LEADING);
if (hint->outer_inner == NULL)
else
OuterInnerDesc(hint->outer_inner, buf);
- appendStringInfoString(buf, ")\n");
+ appendStringInfoString(buf, ")");
+ if (!nolf)
+ appendStringInfoChar(buf, '\n');
}
static void
-SetHintDesc(SetHint *hint, StringInfo buf)
+SetHintDesc(SetHint *hint, StringInfo buf, bool nolf)
{
bool is_first = true;
ListCell *l;
quote_value(buf, (char *) lfirst(l));
}
- appendStringInfo(buf, ")\n");
+ appendStringInfo(buf, ")");
+ if (!nolf)
+ appendStringInfoChar(buf, '\n');
}
static void
-RowsHintDesc(RowsHint *hint, StringInfo buf)
+RowsHintDesc(RowsHint *hint, StringInfo buf, bool nolf)
{
int i;
quote_value(buf, hint->relnames[i]);
}
}
- appendStringInfo(buf, " %s", hint->rows_str);
- appendStringInfoString(buf, ")\n");
-
+ if (hint->rows_str != NULL)
+ appendStringInfo(buf, " %s", hint->rows_str);
+ appendStringInfoString(buf, ")");
+ if (!nolf)
+ appendStringInfoChar(buf, '\n');
}
/*
*/
static void
desc_hint_in_state(HintState *hstate, StringInfo buf, const char *title,
- HintStatus state)
+ HintStatus state, bool nolf)
{
- int i;
+ int i, nshown;
+
+ appendStringInfo(buf, "%s:", title);
+ if (!nolf)
+ appendStringInfoChar(buf, '\n');
- appendStringInfo(buf, "%s:\n", title);
+ nshown = 0;
for (i = 0; i < hstate->nall_hints; i++)
{
if (hstate->all_hints[i]->state != state)
continue;
- hstate->all_hints[i]->desc_func(hstate->all_hints[i], buf);
+ hstate->all_hints[i]->desc_func(hstate->all_hints[i], buf, nolf);
+ nshown++;
}
+
+ if (nolf && nshown == 0)
+ appendStringInfoString(buf, "(none)");
}
/*
if (!hstate)
{
- elog(LOG, "pg_hint_plan:\nno hint");
+ elog(pg_hint_plan_debug_message_level, "pg_hint_plan:\nno hint");
return;
}
initStringInfo(&buf);
appendStringInfoString(&buf, "pg_hint_plan:\n");
- desc_hint_in_state(hstate, &buf, "used hint", HINT_STATE_USED);
- desc_hint_in_state(hstate, &buf, "not used hint", HINT_STATE_NOTUSED);
- desc_hint_in_state(hstate, &buf, "duplication hint", HINT_STATE_DUPLICATION);
- desc_hint_in_state(hstate, &buf, "error hint", HINT_STATE_ERROR);
+ desc_hint_in_state(hstate, &buf, "used hint", HINT_STATE_USED, false);
+ desc_hint_in_state(hstate, &buf, "not used hint", HINT_STATE_NOTUSED, false);
+ desc_hint_in_state(hstate, &buf, "duplication hint", HINT_STATE_DUPLICATION, false);
+ desc_hint_in_state(hstate, &buf, "error hint", HINT_STATE_ERROR, false);
+
+ ereport(pg_hint_plan_debug_message_level,
+ (errmsg ("%s", buf.data)));
+
+ pfree(buf.data);
+}
+
+static void
+HintStateDump2(HintState *hstate)
+{
+ StringInfoData buf;
+
+ if (!hstate)
+ {
+ elog(pg_hint_plan_debug_message_level,
+ "pg_hint_plan%s: HintStateDump: no hint", qnostr);
+ return;
+ }
- elog(LOG, "%s", buf.data);
+ initStringInfo(&buf);
+ appendStringInfo(&buf, "pg_hint_plan%s: HintStateDump: ", qnostr);
+ desc_hint_in_state(hstate, &buf, "{used hints", HINT_STATE_USED, true);
+ desc_hint_in_state(hstate, &buf, "}, {not used hints", HINT_STATE_NOTUSED, true);
+ desc_hint_in_state(hstate, &buf, "}, {duplicate hints", HINT_STATE_DUPLICATION, true);
+ desc_hint_in_state(hstate, &buf, "}, {error hints", HINT_STATE_ERROR, true);
+ appendStringInfoChar(&buf, '}');
+
+ ereport(pg_hint_plan_debug_message_level,
+ (errmsg("%s", buf.data),
+ errhidestmt(true),
+ errhidecontext(true)));
pfree(buf.data);
}
char *keyword = parser->keyword;
Hint *hint;
- if (strcasecmp(buf.data, keyword) != 0)
+ if (pg_strcasecmp(buf.data, keyword) != 0)
continue;
hint = parser->create_func(head, keyword, parser->hint_keyword);
PG_TRY();
{
- ++nested_level;
+ bool snapshot_set = false;
+
+ hint_inhibit_level++;
+
+ if (!ActiveSnapshotSet())
+ {
+ PushActiveSnapshot(GetTransactionSnapshot());
+ snapshot_set = true;
+ }
SPI_connect();
}
SPI_finish();
-
- --nested_level;
+
+ if (snapshot_set)
+ PopActiveSnapshot();
+
+ hint_inhibit_level--;
}
PG_CATCH();
{
- --nested_level;
+ hint_inhibit_level--;
PG_RE_THROW();
}
PG_END_TRY();
}
/*
- * Get client-supplied query string.
+ * Get client-supplied query string. Addtion to that the jumbled query is
+ * supplied if the caller requested. From the restriction of JumbleQuery, some
+ * kind of query needs special amendments. Reutrns NULL if this query doesn't
+ * change the current hint. This function returns NULL also when something
+ * wrong has happend and let the caller continue using the current hints.
*/
static const char *
-get_query_string(void)
+get_query_string(ParseState *pstate, Query *query, Query **jumblequery)
{
- const char *p;
+ const char *p = debug_query_string;
+
+ /*
+ * If debug_query_string is set, it is the top level statement. But in some
+ * cases we reach here with debug_query_string set NULL for example in the
+ * case of DESCRIBE message handling or EXECUTE command. We may still see a
+ * candidate top-level query in pstate in the case.
+ */
+ if (pstate && pstate->p_sourcetext)
+ p = pstate->p_sourcetext;
- if (stmt_name)
+ /* We don't see a query string, return NULL */
+ if (!p)
+ return NULL;
+
+ if (jumblequery != NULL)
+ *jumblequery = query;
+
+ /* Query for DeclareCursorStmt is CMD_SELECT and has query->utilityStmt */
+ if (query->commandType == CMD_UTILITY || query->utilityStmt)
{
- PreparedStatement *entry;
+ Query *target_query = query;
+
+ /*
+ * Some utility statements have a subquery that we can hint on. Since
+ * EXPLAIN can be placed before other kind of utility statements and
+ * EXECUTE can be contained other kind of utility statements, these
+ * conditions are not mutually exclusive and should be considered in
+ * this order.
+ */
+ if (IsA(target_query->utilityStmt, ExplainStmt))
+ {
+ ExplainStmt *stmt = (ExplainStmt *)target_query->utilityStmt;
+
+ Assert(IsA(stmt->query, Query));
+ target_query = (Query *)stmt->query;
+
+ /* strip out the top-level query for further processing */
+ if (target_query->commandType == CMD_UTILITY &&
+ target_query->utilityStmt != NULL)
+ target_query = (Query *)target_query->utilityStmt;
+ }
+
+ /*
+ * JumbleQuery does not accept a Query that has utilityStmt. On the
+ * other hand DeclareCursorStmt is in a bit strange shape that is
+ * flipped upside down.
+ */
+ if (IsA(target_query, Query) &&
+ target_query->utilityStmt &&
+ IsA(target_query->utilityStmt, DeclareCursorStmt))
+ {
+ /*
+ * The given Query cannot be modified so copy it and modify so that
+ * JumbleQuery can accept it.
+ */
+ Assert(IsA(target_query, Query) &&
+ target_query->commandType == CMD_SELECT);
+ target_query = copyObject(target_query);
+ target_query->utilityStmt = NULL;
+ }
+
+ if (IsA(target_query, CreateTableAsStmt))
+ {
+ CreateTableAsStmt *stmt = (CreateTableAsStmt *) target_query;
- entry = FetchPreparedStatement(stmt_name, true);
- p = entry->plansource->query_string;
+ Assert(IsA(stmt->query, Query));
+ target_query = (Query *) stmt->query;
+
+ /* strip out the top-level query for further processing */
+ if (target_query->commandType == CMD_UTILITY &&
+ target_query->utilityStmt != NULL)
+ target_query = (Query *)target_query->utilityStmt;
+ }
+
+ if (IsA(target_query, ExecuteStmt))
+ {
+ /*
+ * Use the prepared query for EXECUTE. The Query for jumble
+ * also replaced with the corresponding one.
+ */
+ ExecuteStmt *stmt = (ExecuteStmt *)target_query;
+ PreparedStatement *entry;
+
+ entry = FetchPreparedStatement(stmt->name, true);
+
+ if (entry->plansource->is_valid)
+ {
+ p = entry->plansource->query_string;
+ target_query = (Query *) linitial (entry->plansource->query_list);
+ }
+ else
+ {
+ /* igonre the hint for EXECUTE if invalidated */
+ p = NULL;
+ target_query = NULL;
+ }
+ }
+
+ /* JumbleQuery accespts only a non-utility Query */
+ if (target_query &&
+ (!IsA(target_query, Query) ||
+ target_query->utilityStmt != NULL))
+ target_query = NULL;
+
+ if (jumblequery)
+ *jumblequery = target_query;
}
- else if (plpgsql_query_string)
- p = plpgsql_query_string;
- else
- p = debug_query_string;
+ /*
+ * Return NULL if pstate is not of top-level query. We don't need this
+ * when jumble info is not requested or cannot do this when pstate is NULL.
+ */
+ else if (!jumblequery && pstate && pstate->p_sourcetext != p &&
+ strcmp(pstate->p_sourcetext, p) != 0)
+ p = NULL;
return p;
}
switch (hint_keyword)
{
- case HINT_KEYWORD_NESTLOOP_NM:
- hint->enforce_mask = ENABLE_NESTLOOP;
- break;
case HINT_KEYWORD_NESTLOOP:
- hint->enforce_mask |= (ENABLE_NESTLOOP | ENABLE_MATERIALIZE);
+ hint->enforce_mask = ENABLE_NESTLOOP;
break;
case HINT_KEYWORD_MERGEJOIN:
hint->enforce_mask = ENABLE_MERGEJOIN;
hint->enforce_mask = ENABLE_HASHJOIN;
break;
case HINT_KEYWORD_NONESTLOOP:
- hint->enforce_mask = (ENABLE_ALL_JOIN ^ ENABLE_NESTLOOP);
+ hint->enforce_mask = ENABLE_ALL_JOIN ^ ENABLE_NESTLOOP;
break;
case HINT_KEYWORD_NOMERGEJOIN:
- hint->enforce_mask = (ENABLE_ALL_JOIN ^ ENABLE_MERGEJOIN);
+ hint->enforce_mask = ENABLE_ALL_JOIN ^ ENABLE_MERGEJOIN;
break;
case HINT_KEYWORD_NOHASHJOIN:
- hint->enforce_mask = (ENABLE_ALL_JOIN ^ ENABLE_HASHJOIN);
+ hint->enforce_mask = ENABLE_ALL_JOIN ^ ENABLE_HASHJOIN;
break;
default:
hint_ereport(str, ("Unrecognized hint keyword \"%s\".", keyword));
List *name_list = NIL;
char *rows_str;
char *end_ptr;
+ ListCell *l;
+ int i = 0;
if ((str = parse_parentheses(str, &name_list, hint_keyword)) == NULL)
return NULL;
/* Last element must be rows specification */
hint->nrels = list_length(name_list) - 1;
- if (hint->nrels > 0)
+ if (hint->nrels < 1)
{
- ListCell *l;
- int i = 0;
+ hint_ereport(str,
+ ("%s hint needs at least one relation followed by one correction term.",
+ hint->base.keyword));
+ hint->base.state = HINT_STATE_ERROR;
- /*
- * Transform relation names from list to array to sort them with qsort
- * after.
- */
- hint->relnames = palloc(sizeof(char *) * hint->nrels);
- foreach (l, name_list)
- {
- if (hint->nrels <= i)
- break;
- hint->relnames[i] = lfirst(l);
- i++;
- }
+ return str;
+ }
+
+
+ /*
+ * Transform relation names from list to array to sort them with qsort
+ * after.
+ */
+ hint->relnames = palloc(sizeof(char *) * hint->nrels);
+ foreach (l, name_list)
+ {
+ if (hint->nrels <= i)
+ break;
+ hint->relnames[i] = lfirst(l);
+ i++;
}
/* Retieve rows estimation */
PG_TRY();
{
result = set_config_option(name, value, context, source,
- action, changeVal, 0);
+ action, changeVal, 0, false);
}
PG_CATCH();
{
errdata = CopyErrorData();
FlushErrorState();
- ereport(elevel, (errcode(errdata->sqlerrcode),
- errmsg("%s", errdata->message),
- errdata->detail ? errdetail("%s", errdata->detail) : 0,
- errdata->hint ? errhint("%s", errdata->hint) : 0));
+ ereport(elevel,
+ (errcode(errdata->sqlerrcode),
+ errmsg("%s", errdata->message),
+ errdata->detail ? errdetail("%s", errdata->detail) : 0,
+ errdata->hint ? errhint("%s", errdata->hint) : 0));
+ msgqno = qno;
FreeErrorData(errdata);
}
PG_END_TRY();
result = set_config_option_wrapper(hint->name, hint->value, context,
PGC_S_SESSION, GUC_ACTION_SAVE, true,
- pg_hint_plan_parse_messages);
+ pg_hint_plan_parse_message_level);
if (result != 0)
hint->base.state = HINT_STATE_USED;
else
SET_CONFIG_OPTION("enable_nestloop", ENABLE_NESTLOOP);
SET_CONFIG_OPTION("enable_mergejoin", ENABLE_MERGEJOIN);
SET_CONFIG_OPTION("enable_hashjoin", ENABLE_HASHJOIN);
- SET_CONFIG_OPTION("enable_material", ENABLE_MATERIALIZE);
}
/*
- * pg_hint_plan hook functions
+ * Push a hint into hint stack which is implemented with List struct. Head of
+ * list is top of stack.
*/
+static void
+push_hint(HintState *hstate)
+{
+ /* Prepend new hint to the list means pushing to stack. */
+ HintStateStack = lcons(hstate, HintStateStack);
+
+ /* Pushed hint is the one which should be used hereafter. */
+ current_hint = hstate;
+}
+/* Pop a hint from hint stack. Popped hint is automatically discarded. */
static void
-pg_hint_plan_ProcessUtility(Node *parsetree, const char *queryString,
- ProcessUtilityContext context,
- ParamListInfo params,
- DestReceiver *dest, char *completionTag)
+pop_hint(void)
{
- Node *node;
+ /* Hint stack must not be empty. */
+ if(HintStateStack == NIL)
+ elog(ERROR, "hint stack is empty");
- /*
- * Use standard planner if pg_hint_plan is disabled or current nesting
- * depth is nesting depth of SPI calls.
+ /*
+ * Take a hint at the head from the list, and free it. Switch current_hint
+ * to point new head (NULL if the list is empty).
*/
- if (!pg_hint_plan_enable_hint || nested_level > 0)
- {
- if (prev_ProcessUtility)
- (*prev_ProcessUtility) (parsetree, queryString,
- context, params,
- dest, completionTag);
- else
- standard_ProcessUtility(parsetree, queryString,
- context, params,
- dest, completionTag);
- return;
- }
+ HintStateStack = list_delete_first(HintStateStack);
+ HintStateDelete(current_hint);
+ if(HintStateStack == NIL)
+ current_hint = NULL;
+ else
+ current_hint = (HintState *) lfirst(list_head(HintStateStack));
+}
- node = parsetree;
- if (IsA(node, ExplainStmt))
- {
- /*
- * Draw out parse tree of actual query from Query struct of EXPLAIN
- * statement.
- */
- ExplainStmt *stmt;
- Query *query;
+/*
+ * Retrieve and store hint string from given query or from the hint table.
+ */
+static void
+get_current_hint_string(ParseState *pstate, Query *query)
+{
+ const char *query_str;
+ MemoryContext oldcontext;
- stmt = (ExplainStmt *) node;
+ /* do nothing under hint table search */
+ if (hint_inhibit_level > 0)
+ return;
- Assert(IsA(stmt->query, Query));
- query = (Query *) stmt->query;
+ /* We alredy have one, don't parse it again. */
+ if (current_hint_retrieved)
+ return;
- if (query->commandType == CMD_UTILITY && query->utilityStmt != NULL)
- node = query->utilityStmt;
- }
+ /* Don't parse the current query hereafter */
+ current_hint_retrieved = true;
- /*
- * If the query was a EXECUTE or CREATE TABLE AS EXECUTE, get query string
- * specified to preceding PREPARE command to use it as source of hints.
- */
- if (IsA(node, ExecuteStmt))
+ if (!pg_hint_plan_enable_hint)
{
- ExecuteStmt *stmt;
-
- stmt = (ExecuteStmt *) node;
- stmt_name = stmt->name;
+ if (current_hint_str)
+ {
+ pfree((void *)current_hint_str);
+ current_hint_str = NULL;
+ }
+ return;
}
- /*
- * CREATE AS EXECUTE behavior has changed since 9.2, so we must handle it
- * specially here.
- */
- if (IsA(node, CreateTableAsStmt))
+ /* increment the query number */
+ qnostr[0] = 0;
+ if (debug_level > 1)
+ snprintf(qnostr, sizeof(qnostr), "[qno=0x%x]", qno++);
+ qno++;
+
+ /* search the hint table for a hint if requested */
+ if (pg_hint_plan_enable_hint_table)
{
- CreateTableAsStmt *stmt;
- Query *query;
+ int query_len;
+ pgssJumbleState jstate;
+ Query *jumblequery;
+ char *normalized_query = NULL;
- stmt = (CreateTableAsStmt *) node;
- Assert(IsA(stmt->query, Query));
- query = (Query *) stmt->query;
+ query_str = get_query_string(pstate, query, &jumblequery);
- if (query->commandType == CMD_UTILITY &&
- IsA(query->utilityStmt, ExecuteStmt))
- {
- ExecuteStmt *estmt = (ExecuteStmt *) query->utilityStmt;
- stmt_name = estmt->name;
- }
- }
+ /* If this query is not for hint, just return */
+ if (!query_str)
+ return;
- if (stmt_name)
- {
- PG_TRY();
+ /* clear the previous hint string */
+ if (current_hint_str)
{
- if (prev_ProcessUtility)
- (*prev_ProcessUtility) (parsetree, queryString,
- context, params,
- dest, completionTag);
- else
- standard_ProcessUtility(parsetree, queryString,
- context, params,
- dest, completionTag);
+ pfree((void *)current_hint_str);
+ current_hint_str = NULL;
}
- PG_CATCH();
+
+ if (jumblequery)
{
- stmt_name = NULL;
- PG_RE_THROW();
+ /*
+ * XXX: normalization code is copied from pg_stat_statements.c.
+ * Make sure to keep up-to-date with it.
+ */
+ jstate.jumble = (unsigned char *) palloc(JUMBLE_SIZE);
+ jstate.jumble_len = 0;
+ jstate.clocations_buf_size = 32;
+ jstate.clocations = (pgssLocationLen *)
+ palloc(jstate.clocations_buf_size * sizeof(pgssLocationLen));
+ jstate.clocations_count = 0;
+
+ JumbleQuery(&jstate, jumblequery);
+
+ /*
+ * Normalize the query string by replacing constants with '?'
+ */
+ /*
+ * Search hint string which is stored keyed by query string
+ * and application name. The query string is normalized to allow
+ * fuzzy matching.
+ *
+ * Adding 1 byte to query_len ensures that the returned string has
+ * a terminating NULL.
+ */
+ query_len = strlen(query_str) + 1;
+ normalized_query =
+ generate_normalized_query(&jstate, query_str,
+ &query_len,
+ GetDatabaseEncoding());
+
+ /*
+ * find a hint for the normalized query. the result should be in
+ * TopMemoryContext
+ */
+ oldcontext = MemoryContextSwitchTo(TopMemoryContext);
+ current_hint_str =
+ get_hints_from_table(normalized_query, application_name);
+ MemoryContextSwitchTo(oldcontext);
+
+ if (debug_level > 1)
+ {
+ if (current_hint_str)
+ ereport(pg_hint_plan_debug_message_level,
+ (errmsg("pg_hint_plan[qno=0x%x]: "
+ "post_parse_analyze_hook: "
+ "hints from table: \"%s\": "
+ "normalized_query=\"%s\", "
+ "application name =\"%s\"",
+ qno, current_hint_str,
+ normalized_query, application_name),
+ errhidestmt(msgqno != qno),
+ errhidecontext(msgqno != qno)));
+ else
+ ereport(pg_hint_plan_debug_message_level,
+ (errmsg("pg_hint_plan[qno=0x%x]: "
+ "no match found in table: "
+ "application name = \"%s\", "
+ "normalized_query=\"%s\"",
+ qno, application_name,
+ normalized_query),
+ errhidestmt(msgqno != qno),
+ errhidecontext(msgqno != qno)));
+
+ msgqno = qno;
+ }
}
- PG_END_TRY();
- stmt_name = NULL;
+ /* retrun if we have hint here */
+ if (current_hint_str)
+ return;
+ }
+ else
+ query_str = get_query_string(pstate, query, NULL);
- return;
+ if (query_str)
+ {
+ /*
+ * get hints from the comment. However we may have the same query
+ * string with the previous call, but the extra comparison seems no
+ * use..
+ */
+ if (current_hint_str)
+ pfree((void *)current_hint_str);
+
+ oldcontext = MemoryContextSwitchTo(TopMemoryContext);
+ current_hint_str = get_hints_from_comment(query_str);
+ MemoryContextSwitchTo(oldcontext);
+ }
+ else
+ {
+ /*
+ * Failed to get query. We would be in fetching invalidated
+ * plancache. Try the next chance.
+ */
+ current_hint_retrieved = false;
}
- if (prev_ProcessUtility)
- (*prev_ProcessUtility) (parsetree, queryString,
- context, params,
- dest, completionTag);
+ if (debug_level > 1)
+ {
+ if (debug_level == 1 && query_str && debug_query_string &&
+ strcmp(query_str, debug_query_string))
+ ereport(pg_hint_plan_debug_message_level,
+ (errmsg("hints in comment=\"%s\"",
+ current_hint_str ? current_hint_str : "(none)"),
+ errhidestmt(msgqno != qno),
+ errhidecontext(msgqno != qno)));
else
- standard_ProcessUtility(parsetree, queryString,
- context, params,
- dest, completionTag);
+ ereport(pg_hint_plan_debug_message_level,
+ (errmsg("hints in comment=\"%s\", query=\"%s\", debug_query_string=\"%s\"",
+ current_hint_str ? current_hint_str : "(none)",
+ query_str ? query_str : "(none)",
+ debug_query_string ? debug_query_string : "(none)"),
+ errhidestmt(msgqno != qno),
+ errhidecontext(msgqno != qno)));
+ msgqno = qno;
+ }
}
/*
- * Push a hint into hint stack which is implemented with List struct. Head of
- * list is top of stack.
+ * Retrieve hint string from the current query.
*/
static void
-push_hint(HintState *hstate)
+pg_hint_plan_post_parse_analyze(ParseState *pstate, Query *query)
{
- /* Prepend new hint to the list means pushing to stack. */
- HintStateStack = lcons(hstate, HintStateStack);
+ if (prev_post_parse_analyze_hook)
+ prev_post_parse_analyze_hook(pstate, query);
- /* Pushed hint is the one which should be used hereafter. */
- current_hint = hstate;
+ /* always retrieve hint from the top-level query string */
+ if (plpgsql_recurse_level == 0)
+ current_hint_retrieved = false;
+
+ get_current_hint_string(pstate, query);
}
-/* Pop a hint from hint stack. Popped hint is automatically discarded. */
+/*
+ * We need to reset current_hint_retrieved flag always when a command execution
+ * is finished. This is true even for a pure utility command that doesn't
+ * involve planning phase.
+ */
static void
-pop_hint(void)
+pg_hint_plan_ProcessUtility(Node *parsetree, const char *queryString,
+ ProcessUtilityContext context, ParamListInfo params,
+ DestReceiver *dest, char *completionTag)
{
- /* Hint stack must not be empty. */
- if(HintStateStack == NIL)
- elog(ERROR, "hint stack is empty");
-
- /*
- * Take a hint at the head from the list, and free it. Switch current_hint
- * to point new head (NULL if the list is empty).
- */
- HintStateStack = list_delete_first(HintStateStack);
- HintStateDelete(current_hint);
- if(HintStateStack == NIL)
- current_hint = NULL;
+ if (prev_ProcessUtility_hook)
+ prev_ProcessUtility_hook(parsetree, queryString, context, params,
+ dest, completionTag);
else
- current_hint = (HintState *) lfirst(list_head(HintStateStack));
+ standard_ProcessUtility(parsetree, queryString, context, params,
+ dest, completionTag);
+
+ if (plpgsql_recurse_level == 0)
+ current_hint_retrieved = false;
}
+/*
+ * Read and set up hint information
+ */
static PlannedStmt *
pg_hint_plan_planner(Query *parse, int cursorOptions, ParamListInfo boundParams)
{
- const char *hints = NULL;
- const char *query;
- char *norm_query;
- pgssJumbleState jstate;
- int query_len;
int save_nestlevel;
PlannedStmt *result;
HintState *hstate;
+ const char *prev_hint_str = NULL;
/*
* Use standard planner if pg_hint_plan is disabled or current nesting
* depth is nesting depth of SPI calls. Other hook functions try to change
* plan with current_hint if any, so set it to NULL.
*/
- if (!pg_hint_plan_enable_hint || nested_level > 0)
- goto standard_planner_proc;
+ if (!pg_hint_plan_enable_hint || hint_inhibit_level > 0)
+ {
+ if (debug_level > 1)
+ ereport(pg_hint_plan_debug_message_level,
+ (errmsg ("pg_hint_plan%s: planner: enable_hint=%d,"
+ " hint_inhibit_level=%d",
+ qnostr, pg_hint_plan_enable_hint,
+ hint_inhibit_level),
+ errhidestmt(msgqno != qno)));
+ msgqno = qno;
- /* Create hint struct from client-supplied query string. */
- query = get_query_string();
+ goto standard_planner_proc;
+ }
/*
- * Create hintstate from hint specified for the query, if any.
- *
- * First we lookup hint in pg_hint.hints table by normalized query string,
- * unless pg_hint_plan.enable_hint_table is OFF.
- * This parameter provides option to avoid overhead of table lookup during
- * planning.
- *
- * If no hint was found, then we try to get hint from special query comment.
+ * Support for nested plpgsql functions. This is quite ugly but this is the
+ * only point I could find where I can get the query string.
*/
- if (pg_hint_plan_enable_hint_table)
+ if (plpgsql_recurse_level > 0 &&
+ error_context_stack && error_context_stack->arg)
{
- /*
- * Search hint information which is stored for the query and the
- * application. Query string is normalized before using in condition
- * in order to allow fuzzy matching.
- *
- * XXX: normalizing code is copied from pg_stat_statements.c, so be
- * careful when supporting PostgreSQL's version up.
- */
- jstate.jumble = (unsigned char *) palloc(JUMBLE_SIZE);
- jstate.jumble_len = 0;
- jstate.clocations_buf_size = 32;
- jstate.clocations = (pgssLocationLen *)
- palloc(jstate.clocations_buf_size * sizeof(pgssLocationLen));
- jstate.clocations_count = 0;
- JumbleQuery(&jstate, parse);
- /*
- * generate_normalized_query() copies exact given query_len bytes, so we
- * add 1 byte for null-termination here. As comments on
- * generate_normalized_query says, generate_normalized_query doesn't
- * take care of null-terminate, but additional 1 byte ensures that '\0'
- * byte in the source buffer to be copied into norm_query.
- */
- query_len = strlen(query) + 1;
- norm_query = generate_normalized_query(&jstate,
- query,
- &query_len,
- GetDatabaseEncoding());
- hints = get_hints_from_table(norm_query, application_name);
- elog(DEBUG1,
- "pg_hint_plan: get_hints_from_table [%s][%s]=>[%s]",
- norm_query, application_name, hints ? hints : "(none)");
+ MemoryContext oldcontext;
+
+ if (current_hint_str)
+ pfree((void *)current_hint_str);
+
+ oldcontext = MemoryContextSwitchTo(TopMemoryContext);
+ current_hint_str =
+ get_hints_from_comment((char *)error_context_stack->arg);
+ MemoryContextSwitchTo(oldcontext);
}
- if (hints == NULL)
- hints = get_hints_from_comment(query);
- hstate = create_hintstate(parse, hints);
/*
- * Use standard planner if the statement has not valid hint. Other hook
- * functions try to change plan with current_hint if any, so set it to
- * NULL.
+ * Query execution in extended protocol can be started without the analyze
+ * phase. In the case retrieve hint string here.
*/
- if (!hstate)
+ if (!current_hint_str)
+ get_current_hint_string(NULL, parse);
+
+ /* No hint, go the normal way */
+ if (!current_hint_str)
goto standard_planner_proc;
+ /* parse the hint into hint state struct */
+ hstate = create_hintstate(parse, pstrdup(current_hint_str));
+
+ /* run standard planner if the statement has not valid hint */
+ if (!hstate)
+ goto standard_planner_proc;
+
/*
* Push new hint struct to the hint stack to disable previous hint context.
*/
current_hint->init_join_mask |= ENABLE_MERGEJOIN;
if (enable_hashjoin)
current_hint->init_join_mask |= ENABLE_HASHJOIN;
- if (enable_material)
- current_hint->init_join_mask |= ENABLE_MATERIALIZE;
+
+ if (debug_level > 1)
+ {
+ ereport(pg_hint_plan_debug_message_level,
+ (errhidestmt(msgqno != qno),
+ errmsg("pg_hint_plan%s: planner", qnostr)));
+ msgqno = qno;
+ }
/*
- * Use PG_TRY mechanism to recover GUC parameters and current_hint to the
- * state when this planner started when error occurred in planner.
+ * The planner call below may replace current_hint_str. Store and restore
+ * it so that the subsequent planning in the upper level doesn't get
+ * confused.
+ */
+ recurse_level++;
+ prev_hint_str = current_hint_str;
+ current_hint_str = NULL;
+
+ /*
+ * Use PG_TRY mechanism to recover GUC parameters and current_hint_state to
+ * the state when this planner started when error occurred in planner.
*/
PG_TRY();
{
result = (*prev_planner) (parse, cursorOptions, boundParams);
else
result = standard_planner(parse, cursorOptions, boundParams);
+
+ current_hint_str = prev_hint_str;
+ recurse_level--;
}
PG_CATCH();
{
* Rollback changes of GUC parameters, and pop current hint context
* from hint stack to rewind the state.
*/
+ current_hint_str = prev_hint_str;
+ recurse_level--;
AtEOXact_GUC(true, save_nestlevel);
pop_hint();
PG_RE_THROW();
}
PG_END_TRY();
+
+ /*
+ * current_hint_str is useless after planning of the top-level query.
+ */
+ if (plpgsql_recurse_level < 1 && current_hint_str)
+ {
+ pfree((void *)current_hint_str);
+ current_hint_str = NULL;
+ current_hint_retrieved = false;
+ }
+
/* Print hint in debug mode. */
- if (pg_hint_plan_debug_print)
+ if (debug_level == 1)
HintStateDump(current_hint);
+ else if (debug_level > 1)
+ HintStateDump2(current_hint);
/*
* Rollback changes of GUC parameters, and pop current hint context from
return result;
standard_planner_proc:
+ if (debug_level > 1)
+ {
+ ereport(pg_hint_plan_debug_message_level,
+ (errhidestmt(msgqno != qno),
+ errmsg("pg_hint_plan%s: planner: no valid hint",
+ qnostr)));
+ msgqno = qno;
+ }
current_hint = NULL;
if (prev_planner)
return (*prev_planner) (parse, cursorOptions, boundParams);
* other than it.
*/
prev = NULL;
- if (pg_hint_plan_debug_print)
+ if (debug_level > 0)
initStringInfo(&buf);
for (cell = list_head(rel->indexlist); cell; cell = next)
if (result)
{
use_index = true;
- if (pg_hint_plan_debug_print)
+ if (debug_level > 0)
{
appendStringInfoCharMacro(&buf, ' ');
quote_value(&buf, indexname);
use_index = true;
/* to log the candidate of index */
- if (pg_hint_plan_debug_print)
+ if (debug_level > 0)
{
appendStringInfoCharMacro(&buf, ' ');
quote_value(&buf, indexname);
pfree(indexname);
}
- if (pg_hint_plan_debug_print)
+ if (debug_level == 1)
{
char *relname;
StringInfoData rel_buf;
initStringInfo(&rel_buf);
quote_value(&rel_buf, relname);
- ereport(LOG,
+ ereport(pg_hint_plan_debug_message_level,
(errmsg("available indexes for %s(%s):%s",
hint->base.keyword,
rel_buf.data,
* Do nothing if we don't have a valid hint in this context or current
* nesting depth is at SPI calls.
*/
- if (!current_hint || nested_level > 0)
+ if (!current_hint || hint_inhibit_level > 0)
+ {
+ if (debug_level > 1)
+ ereport(pg_hint_plan_debug_message_level,
+ (errhidestmt(true),
+ errmsg ("pg_hint_plan%s: get_relation_info"
+ " no hint to apply: relation=%u(%s), inhparent=%d,"
+ " current_hint=%p, hint_inhibit_level=%d",
+ qnostr, relationObjectId,
+ get_rel_name(relationObjectId),
+ inhparent, current_hint, hint_inhibit_level)));
return;
+ }
/*
* We could register the parent relation of the following children here
* called for them.
*/
if (inhparent)
+ {
+ if (debug_level > 1)
+ ereport(pg_hint_plan_debug_message_level,
+ (errhidestmt(true),
+ errmsg ("pg_hint_plan%s: get_relation_info"
+ " skipping inh parent: relation=%u(%s), inhparent=%d,"
+ " current_hint=%p, hint_inhibit_level=%d",
+ qnostr, relationObjectId,
+ get_rel_name(relationObjectId),
+ inhparent, current_hint, hint_inhibit_level)));
return;
+ }
+
+ /* Forget about the parent of another subquery */
+ if (root != current_hint->current_root)
+ current_hint->parent_relid = 0;
- /* Find the parent for this relation */
+ /* Find the parent for this relation other than the registered parent */
foreach (l, root->append_rel_list)
{
AppendRelInfo *appinfo = (AppendRelInfo *) lfirst(l);
if (appinfo->child_relid == rel->relid)
{
if (current_hint->parent_relid != appinfo->parent_relid)
+ {
new_parent_relid = appinfo->parent_relid;
+ current_hint->current_root = root;
+ }
break;
}
}
relationObjectId);
/* Scan fixation status is the same to the parent. */
+ if (debug_level > 1)
+ ereport(pg_hint_plan_debug_message_level,
+ (errhidestmt(true),
+ errmsg("pg_hint_plan%s: get_relation_info:"
+ " index deletion by parent hint: "
+ "relation=%u(%s), inhparent=%d, current_hint=%p,"
+ " hint_inhibit_level=%d",
+ qnostr, relationObjectId,
+ get_rel_name(relationObjectId),
+ inhparent, current_hint, hint_inhibit_level)));
return;
}
hint->base.state = HINT_STATE_USED;
delete_indexes(hint, rel, InvalidOid);
+
+ if (debug_level > 1)
+ ereport(pg_hint_plan_debug_message_level,
+ (errhidestmt(true),
+ errmsg ("pg_hint_plan%s: get_relation_info"
+ " index deletion:"
+ " relation=%u(%s), inhparent=%d, current_hint=%p,"
+ " hint_inhibit_level=%d, scanmask=0x%x",
+ qnostr, relationObjectId,
+ get_rel_name(relationObjectId),
+ inhparent, current_hint, hint_inhibit_level,
+ hint->enforce_mask)));
}
else
+ {
+ if (debug_level > 1)
+ ereport(pg_hint_plan_debug_message_level,
+ (errhidestmt (true),
+ errmsg ("pg_hint_plan%s: get_relation_info"
+ " no hint applied:"
+ " relation=%u(%s), inhparent=%d, current_hint=%p,"
+ " hint_inhibit_level=%d, scanmask=0x%x",
+ qnostr, relationObjectId,
+ get_rel_name(relationObjectId),
+ inhparent, current_hint, hint_inhibit_level,
+ current_hint->init_scan_mask)));
set_scan_config_options(current_hint->init_scan_mask,
current_hint->context);
+ }
return;
}
{
set_plain_rel_pathlist(root, rel, rte);
}
+
+ set_cheapest(rel);
}
/*
* valid hint is supplied or current nesting depth is nesting depth of SPI
* calls.
*/
- if (!current_hint || nested_level > 0)
+ if (!current_hint || hint_inhibit_level > 0)
{
if (prev_join_search)
return (*prev_join_search) (root, levels_needed, initial_rels);
static void
pg_hint_plan_plpgsql_stmt_beg(PLpgSQL_execstate *estate, PLpgSQL_stmt *stmt)
{
- PLpgSQL_expr *expr = NULL;
-
- switch ((enum PLpgSQL_stmt_types) stmt->cmd_type)
- {
- case PLPGSQL_STMT_FORS:
- expr = ((PLpgSQL_stmt_fors *) stmt)->query;
- break;
- case PLPGSQL_STMT_FORC:
- expr = ((PLpgSQL_var *) (estate->datums[((PLpgSQL_stmt_forc *)stmt)->curvar]))->cursor_explicit_expr;
- break;
- case PLPGSQL_STMT_RETURN_QUERY:
- if (((PLpgSQL_stmt_return_query *) stmt)->query != NULL)
- expr = ((PLpgSQL_stmt_return_query *) stmt)->query;
- else
- expr = ((PLpgSQL_stmt_return_query *) stmt)->dynquery;
- break;
- case PLPGSQL_STMT_EXECSQL:
- expr = ((PLpgSQL_stmt_execsql *) stmt)->sqlstmt;
- break;
- case PLPGSQL_STMT_DYNEXECUTE:
- expr = ((PLpgSQL_stmt_dynexecute *) stmt)->query;
- break;
- case PLPGSQL_STMT_DYNFORS:
- expr = ((PLpgSQL_stmt_dynfors *) stmt)->query;
- break;
- case PLPGSQL_STMT_OPEN:
- if (((PLpgSQL_stmt_open *) stmt)->query != NULL)
- expr = ((PLpgSQL_stmt_open *) stmt)->query;
- else if (((PLpgSQL_stmt_open *) stmt)->dynquery != NULL)
- expr = ((PLpgSQL_stmt_open *) stmt)->dynquery;
- else
- expr = ((PLpgSQL_var *) (estate->datums[((PLpgSQL_stmt_open *)stmt)->curvar]))->cursor_explicit_expr;
- break;
- default:
- break;
- }
-
- if (expr)
- plpgsql_query_string = expr->query;
+ plpgsql_recurse_level++;
}
/*
static void
pg_hint_plan_plpgsql_stmt_end(PLpgSQL_execstate *estate, PLpgSQL_stmt *stmt)
{
- if ((enum PLpgSQL_stmt_types) stmt->cmd_type == PLPGSQL_STMT_EXECSQL)
- plpgsql_query_string = NULL;
+ plpgsql_recurse_level--;
+}
+
+void plpgsql_query_erase_callback(ResourceReleasePhase phase,
+ bool isCommit,
+ bool isTopLevel,
+ void *arg)
+{
+ if (!isTopLevel || phase != RESOURCE_RELEASE_AFTER_LOCKS)
+ return;
+ /* Cancel plpgsql nest level*/
+ plpgsql_recurse_level = 0;
}
#define standard_join_search pg_hint_plan_standard_join_search
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