<!--
Documentation of the system catalogs, directed toward PostgreSQL developers
- $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.115 2005/11/04 23:13:59 petere Exp $
+ $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.116 2006/01/08 07:00:24 neilc Exp $
-->
<chapter id="catalogs">
</row>
<row>
+ <entry><link linkend="view-pg-prepared-statements"><structname>pg_prepared_statements</structname></link></entry>
+ <entry>current prepared statements</entry>
+ </row>
+
+ <row>
<entry><link linkend="view-pg-prepared-xacts"><structname>pg_prepared_xacts</structname></link></entry>
<entry>currently prepared transactions</entry>
</row>
</sect1>
+ <sect1 id="view-pg-prepared-statements">
+ <title><structname>pg_prepared_statements</structname></title>
+
+ <indexterm zone="view-pg-prepared-statements">
+ <primary>pg_prepared_statements</primary>
+ </indexterm>
+
+ <para>
+ The <structname>pg_prepared_statements</structname> view displays
+ all the prepared statements that are available in the current
+ session. See <xref linkend="sql-prepare"
+ endterm="sql-prepare-title"> for more information about prepared
+ statements.
+ </para>
+
+ <para>
+ <structname>pg_prepared_statements</structname> contains one row
+ for each prepared statement. Rows are added to the view when a new
+ prepared statement is created, and removed when a prepared
+ statement is released (for example, via the <xref
+ linkend="sql-deallocate" endterm="sql-deallocate-title">
+ command).
+ </para>
+
+ <table>
+ <title><structname>pg_prepared_statements</> Columns</title>
+
+ <tgroup cols=4>
+ <thead>
+ <row>
+ <entry>Name</entry>
+ <entry>Type</entry>
+ <entry>References</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+ <tbody>
+ <row>
+ <entry><structfield>name</structfield></entry>
+ <entry><type>text</type></entry>
+ <entry></entry>
+ <entry>
+ The identifier of the prepared statement.
+ </entry>
+ </row>
+ <row>
+ <entry><structfield>statement</structfield></entry>
+ <entry><type>text</type></entry>
+ <entry></entry>
+ <entry>
+ The query string submitted by the client to create this
+ prepared statement. For prepared statements created via SQL,
+ this is the <command>PREPARE</command> statement submitted by
+ the client. For prepared statements created via the
+ frontend/backend protocol, this is the text of the prepared
+ statement itself.
+ </entry>
+ </row>
+ <row>
+ <entry><structfield>prepare_time</structfield></entry>
+ <entry><type>timestamptz</type></entry>
+ <entry></entry>
+ <entry>
+ The time at which the prepared statement was created.
+ </entry>
+ </row>
+ <row>
+ <entry><structfield>parameter_types</structfield></entry>
+ <entry><type>oid[]</type></entry>
+ <entry></entry>
+ <entry>
+ The expected parameter types for the prepared statement in the form of
+ an array of type OIDs.
+ </entry>
+ </row>
+ <row>
+ <entry><structfield>from_sql</structfield></entry>
+ <entry><type>boolean</type></entry>
+ <entry></entry>
+ <entry>
+ <literal>true</literal> if the prepared statement was created
+ via the <command>PREPARE</command> SQL statement;
+ <literal>false</literal> if the statement was prepared via the
+ frontend/backend protocol.
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <para>
+ The <structname>pg_prepared_statements</structname> view is read only.
+ </para>
+ </sect1>
+
<sect1 id="view-pg-prepared-xacts">
<title><structname>pg_prepared_xacts</structname></title>
<!--
-$PostgreSQL: pgsql/doc/src/sgml/ref/prepare.sgml,v 1.16 2005/10/15 01:47:12 neilc Exp $
+$PostgreSQL: pgsql/doc/src/sgml/ref/prepare.sgml,v 1.17 2006/01/08 07:00:25 neilc Exp $
PostgreSQL documentation
-->
the <xref linkend="sql-analyze" endterm="sql-analyze-title">
documentation.
</para>
+
+ <para>
+ You can see all available prepared statements of a session by querying the
+ <structname>pg_prepared_statements</> system view.
+ </para>
</refsect1>
<refsect1 id="sql-prepare-examples">
*
* Copyright (c) 1996-2005, PostgreSQL Global Development Group
*
- * $PostgreSQL: pgsql/src/backend/catalog/system_views.sql,v 1.22 2005/10/06 02:29:15 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/catalog/system_views.sql,v 1.23 2006/01/08 07:00:25 neilc Exp $
*/
CREATE VIEW pg_roles AS
LEFT JOIN pg_authid U ON P.ownerid = U.oid
LEFT JOIN pg_database D ON P.dbid = D.oid;
+CREATE VIEW pg_prepared_statements AS
+ SELECT P.name, P.statement, P.prepare_time, P.parameter_types, P.from_sql
+ FROM pg_prepared_statement() AS P
+ (name text, statement text, prepare_time timestamptz,
+ parameter_types oid[], from_sql boolean);
+
CREATE VIEW pg_settings AS
SELECT *
FROM pg_show_all_settings() AS A
* Copyright (c) 2002-2005, PostgreSQL Global Development Group
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/commands/prepare.c,v 1.44 2005/12/14 17:06:27 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/commands/prepare.c,v 1.45 2006/01/08 07:00:25 neilc Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
+#include "access/heapam.h"
+#include "catalog/pg_type.h"
#include "commands/explain.h"
#include "commands/prepare.h"
#include "executor/executor.h"
-#include "utils/guc.h"
+#include "funcapi.h"
+#include "parser/parsetree.h"
#include "optimizer/planner.h"
#include "rewrite/rewriteHandler.h"
#include "tcop/pquery.h"
#include "tcop/tcopprot.h"
#include "tcop/utility.h"
+#include "utils/builtins.h"
+#include "utils/guc.h"
#include "utils/hsearch.h"
#include "utils/memutils.h"
static void InitQueryHashTable(void);
static ParamListInfo EvaluateParams(EState *estate,
List *params, List *argtypes);
+static Datum build_oid_array(List *oid_list);
/*
* Implements the 'PREPARE' utility statement.
commandTag,
query_list,
plan_list,
- stmt->argtype_oids);
+ stmt->argtype_oids,
+ true);
}
/*
const char *commandTag,
List *query_list,
List *plan_list,
- List *argtype_list)
+ List *argtype_list,
+ bool from_sql)
{
PreparedStatement *entry;
MemoryContext oldcxt,
entry->plan_list = plan_list;
entry->argtype_list = argtype_list;
entry->context = entrycxt;
+ entry->prepare_time = GetCurrentTimestamp();
+ entry->from_sql = from_sql;
MemoryContextSwitchTo(oldcxt);
}
{
/*
* We can't just use the statement name as supplied by the user: the
- * hash package is picky enough that it needs to be NULL-padded out to
+ * hash package is picky enough that it needs to be NUL-padded out to
* the appropriate length to work correctly.
*/
StrNCpy(key, stmt_name, sizeof(key));
if (estate)
FreeExecutorState(estate);
}
+
+/*
+ * This set returning function reads all the prepared statements and
+ * returns a set of (name, statement, prepare_time, param_types).
+ */
+Datum
+pg_prepared_statement(PG_FUNCTION_ARGS)
+{
+ FuncCallContext *funcctx;
+ HASH_SEQ_STATUS *hash_seq;
+ PreparedStatement *prep_stmt;
+
+ /* stuff done only on the first call of the function */
+ if (SRF_IS_FIRSTCALL())
+ {
+ TupleDesc tupdesc;
+ MemoryContext oldcontext;
+
+ /* create a function context for cross-call persistence */
+ funcctx = SRF_FIRSTCALL_INIT();
+
+ /*
+ * switch to memory context appropriate for multiple function
+ * calls
+ */
+ oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
+
+ /* allocate memory for user context */
+ if (prepared_queries)
+ {
+ hash_seq = (HASH_SEQ_STATUS *) palloc(sizeof(HASH_SEQ_STATUS));
+ hash_seq_init(hash_seq, prepared_queries);
+ funcctx->user_fctx = (void *) hash_seq;
+ }
+ else
+ funcctx->user_fctx = NULL;
+
+ /*
+ * build tupdesc for result tuples. This must match the
+ * definition of the pg_prepared_statements view in
+ * system_views.sql
+ */
+ tupdesc = CreateTemplateTupleDesc(5, false);
+ TupleDescInitEntry(tupdesc, (AttrNumber) 1, "name",
+ TEXTOID, -1, 0);
+ TupleDescInitEntry(tupdesc, (AttrNumber) 2, "statement",
+ TEXTOID, -1, 0);
+ TupleDescInitEntry(tupdesc, (AttrNumber) 3, "prepare_time",
+ TIMESTAMPTZOID, -1, 0);
+ TupleDescInitEntry(tupdesc, (AttrNumber) 4, "parameter_types",
+ OIDARRAYOID, -1, 0);
+ TupleDescInitEntry(tupdesc, (AttrNumber) 5, "from_sql",
+ BOOLOID, -1, 0);
+
+ funcctx->tuple_desc = BlessTupleDesc(tupdesc);
+ MemoryContextSwitchTo(oldcontext);
+ }
+
+ /* stuff done on every call of the function */
+ funcctx = SRF_PERCALL_SETUP();
+ hash_seq = (HASH_SEQ_STATUS *) funcctx->user_fctx;
+
+ /* if the hash table is uninitialized, we're done */
+ if (hash_seq == NULL)
+ SRF_RETURN_DONE(funcctx);
+
+ prep_stmt = hash_seq_search(hash_seq);
+ if (prep_stmt)
+ {
+ Datum result;
+ HeapTuple tuple;
+ Datum values[5];
+ bool nulls[5];
+
+ MemSet(nulls, 0, sizeof(nulls));
+
+ values[0] = DirectFunctionCall1(textin,
+ CStringGetDatum(prep_stmt->stmt_name));
+
+ if (prep_stmt->query_string == NULL)
+ nulls[1] = true;
+ else
+ values[1] = DirectFunctionCall1(textin,
+ CStringGetDatum(prep_stmt->query_string));
+
+ values[2] = TimestampTzGetDatum(prep_stmt->prepare_time);
+ values[3] = build_oid_array(prep_stmt->argtype_list);
+ values[4] = BoolGetDatum(prep_stmt->from_sql);
+
+ tuple = heap_form_tuple(funcctx->tuple_desc, values, nulls);
+ result = HeapTupleGetDatum(tuple);
+ SRF_RETURN_NEXT(funcctx, result);
+ }
+
+ SRF_RETURN_DONE(funcctx);
+}
+
+/*
+ * This utility function takes a List of Oids, and returns a Datum
+ * pointing to a Postgres array containing those OIDs. The empty list
+ * is returned as a zero-element array, not NULL.
+ */
+static Datum
+build_oid_array(List *oid_list)
+{
+ ListCell *lc;
+ int len;
+ int i;
+ Datum *tmp_ary;
+ ArrayType *ary;
+
+ len = list_length(oid_list);
+ tmp_ary = (Datum *) palloc(len * sizeof(Datum));
+
+ i = 0;
+ foreach(lc, oid_list)
+ tmp_ary[i++] = ObjectIdGetDatum(lfirst_oid(lc));
+
+ /* XXX: this hardcodes assumptions about the OID type... */
+ ary = construct_array(tmp_ary, len, OIDOID, sizeof(Oid), true, 'i');
+ return PointerGetDatum(ary);
+}
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.477 2006/01/05 10:07:45 petere Exp $
+ * $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.478 2006/01/08 07:00:25 neilc Exp $
*
* NOTES
* this is the "main" module of the postgres backend and
#include "tcop/pquery.h"
#include "tcop/tcopprot.h"
#include "tcop/utility.h"
+#include "utils/builtins.h"
#include "utils/flatfiles.h"
#include "utils/guc.h"
#include "utils/lsyscache.h"
commandTag,
querytree_list,
plantree_list,
- param_list);
+ param_list,
+ false);
}
else
{
pstmt->query_list = querytree_list;
pstmt->plan_list = plantree_list;
pstmt->argtype_list = param_list;
+ pstmt->from_sql = false;
pstmt->context = unnamed_stmt_context;
/* Now the unnamed statement is complete and valid */
unnamed_stmt_pstmt = pstmt;
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.308 2005/12/28 01:30:01 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.309 2006/01/08 07:00:25 neilc Exp $
*
*-------------------------------------------------------------------------
*/
*/
/* yyyymmddN */
-#define CATALOG_VERSION_NO 200512271
+#define CATALOG_VERSION_NO 200601081
#endif
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.389 2005/11/17 22:14:54 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.390 2006/01/08 07:00:25 neilc Exp $
*
* NOTES
* The script catalog/genbki.sh reads this file and generates .bki
DESCR("constraint description with pretty-print option");
DATA(insert OID = 2509 ( pg_get_expr PGNSP PGUID 12 f f t f s 3 25 "25 26 16" _null_ _null_ _null_ pg_get_expr_ext - _null_ ));
DESCR("deparse an encoded expression with pretty-print option");
+DATA(insert OID = 2510 ( pg_prepared_statement PGNSP PGUID 12 f f t t s 0 2249 "" _null_ _null_ _null_ pg_prepared_statement - _null_ ));
+DESCR("get the prepared statements for this session");
/* non-persistent series generator */
DATA(insert OID = 1066 ( generate_series PGNSP PGUID 12 f f t t v 3 23 "23 23 23" _null_ _null_ _null_ generate_series_step_int4 - _null_ ));
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/catalog/pg_type.h,v 1.167 2005/11/22 18:17:30 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/pg_type.h,v 1.168 2006/01/08 07:00:26 neilc Exp $
*
* NOTES
* the genbki.sh script reads this file and generates .bki
DATA(insert OID = 1008 ( _regproc PGNSP PGUID -1 f b t \054 0 24 array_in array_out array_recv array_send - i x f 0 -1 0 _null_ _null_ ));
DATA(insert OID = 1009 ( _text PGNSP PGUID -1 f b t \054 0 25 array_in array_out array_recv array_send - i x f 0 -1 0 _null_ _null_ ));
DATA(insert OID = 1028 ( _oid PGNSP PGUID -1 f b t \054 0 26 array_in array_out array_recv array_send - i x f 0 -1 0 _null_ _null_ ));
+#define OIDARRAYOID 1028
DATA(insert OID = 1010 ( _tid PGNSP PGUID -1 f b t \054 0 27 array_in array_out array_recv array_send - i x f 0 -1 0 _null_ _null_ ));
DATA(insert OID = 1011 ( _xid PGNSP PGUID -1 f b t \054 0 28 array_in array_out array_recv array_send - i x f 0 -1 0 _null_ _null_ ));
DATA(insert OID = 1012 ( _cid PGNSP PGUID -1 f b t \054 0 29 array_in array_out array_recv array_send - i x f 0 -1 0 _null_ _null_ ));
*
* Copyright (c) 2002-2005, PostgreSQL Global Development Group
*
- * $PostgreSQL: pgsql/src/include/commands/prepare.h,v 1.16 2005/12/14 17:06:28 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/commands/prepare.h,v 1.17 2006/01/08 07:00:26 neilc Exp $
*
*-------------------------------------------------------------------------
*/
typedef struct
{
/* dynahash.c requires key to be first field */
- char stmt_name[NAMEDATALEN];
- char *query_string; /* text of query, or NULL */
- const char *commandTag; /* command tag (a constant!), or NULL */
- List *query_list; /* list of queries */
- List *plan_list; /* list of plans */
- List *argtype_list; /* list of parameter type OIDs */
- MemoryContext context; /* context containing this query */
+ char stmt_name[NAMEDATALEN];
+ char *query_string; /* text of query, or NULL */
+ const char *commandTag; /* command tag (a constant!), or NULL */
+ List *query_list; /* list of queries, rewritten */
+ List *plan_list; /* list of plans */
+ List *argtype_list; /* list of parameter type OIDs */
+ TimestampTz prepare_time; /* the time when the stmt was prepared */
+ bool from_sql; /* stmt prepared via SQL, not
+ * FE/BE protocol? */
+ MemoryContext context; /* context containing this query */
} PreparedStatement;
const char *commandTag,
List *query_list,
List *plan_list,
- List *argtype_list);
+ List *argtype_list,
+ bool from_sql);
extern PreparedStatement *FetchPreparedStatement(const char *stmt_name,
bool throwError);
extern void DropPreparedStatement(const char *stmt_name, bool showError);
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.268 2005/11/22 18:17:32 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.269 2006/01/08 07:00:26 neilc Exp $
*
*-------------------------------------------------------------------------
*/
/* catalog/pg_conversion.c */
extern Datum pg_convert_using(PG_FUNCTION_ARGS);
+/* commands/prepare.c */
+extern Datum pg_prepared_statement(PG_FUNCTION_ARGS);
+
#endif /* BUILTINS_H */
--- Regression tests for prepareable statements
-PREPARE q1 AS SELECT 1;
+-- Regression tests for prepareable statements. We query the content
+-- of the pg_prepared_statements view as prepared statements are
+-- created and removed.
+SELECT name, statement, parameter_types FROM pg_prepared_statements;
+ name | statement | parameter_types
+------+-----------+-----------------
+(0 rows)
+
+PREPARE q1 AS SELECT 1 AS a;
EXECUTE q1;
- ?column?
-----------
- 1
+ a
+---
+ 1
+(1 row)
+
+SELECT name, statement, parameter_types FROM pg_prepared_statements;
+ name | statement | parameter_types
+------+------------------------------+-----------------
+ q1 | PREPARE q1 AS SELECT 1 AS a; | {}
(1 row)
-- should fail
2
(1 row)
+PREPARE q2 AS SELECT 2 AS b;
+SELECT name, statement, parameter_types FROM pg_prepared_statements;
+ name | statement | parameter_types
+------+------------------------------+-----------------
+ q1 | PREPARE q1 AS SELECT 2; | {}
+ q2 | PREPARE q2 AS SELECT 2 AS b; | {}
+(2 rows)
+
-- sql92 syntax
DEALLOCATE PREPARE q1;
+SELECT name, statement, parameter_types FROM pg_prepared_statements;
+ name | statement | parameter_types
+------+------------------------------+-----------------
+ q2 | PREPARE q2 AS SELECT 2 AS b; | {}
+(1 row)
+
+DEALLOCATE PREPARE q2;
+-- the view should return the empty set again
+SELECT name, statement, parameter_types FROM pg_prepared_statements;
+ name | statement | parameter_types
+------+-----------+-----------------
+(0 rows)
+
-- parameterized queries
PREPARE q2(text) AS
SELECT datname, datistemplate, datallowconn
FROM pg_database WHERE datname = $1;
+SELECT name, statement, parameter_types FROM pg_prepared_statements;
+ name | statement | parameter_types
+------+--------------------------------------------------------------------------------------------------------+-----------------
+ q2 | PREPARE q2(text) AS
+ SELECT datname, datistemplate, datallowconn
+ FROM pg_database WHERE datname = $1; | {25}
+(1 row)
+
EXECUTE q2('regression');
datname | datistemplate | datallowconn
------------+---------------+--------------
PREPARE q3(text, int, float, boolean, oid, smallint) AS
SELECT * FROM tenk1 WHERE string4 = $1 AND (four = $2 OR
ten = $3::bigint OR true = $4 OR oid = $5 OR odd = $6::int);
+SELECT name, statement, parameter_types FROM pg_prepared_statements;
+ name | statement | parameter_types
+------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------
+ q2 | PREPARE q2(text) AS
+ SELECT datname, datistemplate, datallowconn
+ FROM pg_database WHERE datname = $1; | {25}
+ q3 | PREPARE q3(text, int, float, boolean, oid, smallint) AS
+ SELECT * FROM tenk1 WHERE string4 = $1 AND (four = $2 OR
+ ten = $3::bigint OR true = $4 OR oid = $5 OR odd = $6::int); | {25,23,701,16,26,21}
+(2 rows)
+
EXECUTE q3('AAAAxx', 5::smallint, 10.5::float, false, 500::oid, 4::bigint);
unique1 | unique2 | two | four | ten | twenty | hundred | thousand | twothousand | fivethous | tenthous | odd | even | stringu1 | stringu2 | string4
---------+---------+-----+------+-----+--------+---------+----------+-------------+-----------+----------+-----+------+----------+----------+---------
pg_group | SELECT pg_authid.rolname AS groname, pg_authid.oid AS grosysid, ARRAY(SELECT pg_auth_members.member FROM pg_auth_members WHERE (pg_auth_members.roleid = pg_authid.oid)) AS grolist FROM pg_authid WHERE (NOT pg_authid.rolcanlogin);
pg_indexes | SELECT n.nspname AS schemaname, c.relname AS tablename, i.relname AS indexname, t.spcname AS "tablespace", pg_get_indexdef(i.oid) AS indexdef FROM ((((pg_index x JOIN pg_class c ON ((c.oid = x.indrelid))) JOIN pg_class i ON ((i.oid = x.indexrelid))) LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace))) LEFT JOIN pg_tablespace t ON ((t.oid = i.reltablespace))) WHERE ((c.relkind = 'r'::"char") AND (i.relkind = 'i'::"char"));
pg_locks | SELECT l.locktype, l."database", l.relation, l.page, l.tuple, l.transactionid, l.classid, l.objid, l.objsubid, l."transaction", l.pid, l."mode", l."granted" FROM pg_lock_status() l(locktype text, "database" oid, relation oid, page integer, tuple smallint, transactionid xid, classid oid, objid oid, objsubid smallint, "transaction" xid, pid integer, "mode" text, "granted" boolean);
+ pg_prepared_statements | SELECT p.name, p."statement", p.prepare_time, p.parameter_types, p.from_sql FROM pg_prepared_statement() p(name text, "statement" text, prepare_time timestamp with time zone, parameter_types oid[], from_sql boolean);
pg_prepared_xacts | SELECT p."transaction", p.gid, p."prepared", u.rolname AS "owner", d.datname AS "database" FROM ((pg_prepared_xact() p("transaction" xid, gid text, "prepared" timestamp with time zone, ownerid oid, dbid oid) LEFT JOIN pg_authid u ON ((p.ownerid = u.oid))) LEFT JOIN pg_database d ON ((p.dbid = d.oid)));
pg_roles | SELECT pg_authid.rolname, pg_authid.rolsuper, pg_authid.rolinherit, pg_authid.rolcreaterole, pg_authid.rolcreatedb, pg_authid.rolcatupdate, pg_authid.rolcanlogin, pg_authid.rolconnlimit, '********'::text AS rolpassword, pg_authid.rolvaliduntil, pg_authid.rolconfig, pg_authid.oid FROM pg_authid;
pg_rules | SELECT n.nspname AS schemaname, c.relname AS tablename, r.rulename, pg_get_ruledef(r.oid) AS definition FROM ((pg_rewrite r JOIN pg_class c ON ((c.oid = r.ev_class))) LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace))) WHERE (r.rulename <> '_RETURN'::name);
shoelace_obsolete | SELECT shoelace.sl_name, shoelace.sl_avail, shoelace.sl_color, shoelace.sl_len, shoelace.sl_unit, shoelace.sl_len_cm FROM shoelace WHERE (NOT (EXISTS (SELECT shoe.shoename FROM shoe WHERE (shoe.slcolor = shoelace.sl_color))));
street | SELECT r.name, r.thepath, c.cname FROM ONLY road r, real_city c WHERE (c.outline ## r.thepath);
toyemp | SELECT emp.name, emp.age, emp."location", (12 * emp.salary) AS annualsal FROM emp;
-(44 rows)
+(45 rows)
SELECT tablename, rulename, definition FROM pg_rules
ORDER BY tablename, rulename;
--- Regression tests for prepareable statements
+-- Regression tests for prepareable statements. We query the content
+-- of the pg_prepared_statements view as prepared statements are
+-- created and removed.
-PREPARE q1 AS SELECT 1;
+SELECT name, statement, parameter_types FROM pg_prepared_statements;
+
+PREPARE q1 AS SELECT 1 AS a;
EXECUTE q1;
+SELECT name, statement, parameter_types FROM pg_prepared_statements;
+
-- should fail
PREPARE q1 AS SELECT 2;
PREPARE q1 AS SELECT 2;
EXECUTE q1;
+PREPARE q2 AS SELECT 2 AS b;
+SELECT name, statement, parameter_types FROM pg_prepared_statements;
+
-- sql92 syntax
DEALLOCATE PREPARE q1;
+SELECT name, statement, parameter_types FROM pg_prepared_statements;
+
+DEALLOCATE PREPARE q2;
+-- the view should return the empty set again
+SELECT name, statement, parameter_types FROM pg_prepared_statements;
+
-- parameterized queries
PREPARE q2(text) AS
SELECT datname, datistemplate, datallowconn
FROM pg_database WHERE datname = $1;
+
+SELECT name, statement, parameter_types FROM pg_prepared_statements;
+
EXECUTE q2('regression');
PREPARE q3(text, int, float, boolean, oid, smallint) AS
SELECT * FROM tenk1 WHERE string4 = $1 AND (four = $2 OR
ten = $3::bigint OR true = $4 OR oid = $5 OR odd = $6::int);
+SELECT name, statement, parameter_types FROM pg_prepared_statements;
+
EXECUTE q3('AAAAxx', 5::smallint, 10.5::float, false, 500::oid, 4::bigint);
-- too few params
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