On Tue, 2006-01-03 at 18:00 -0500, Neil Conway wrote:
> Anyway, if there was a reasonably cheap way to present the query strings
> of protocol-level and SQL prepared statements in the same manner, I
> think we should definitely do so. Since there doesn't appear to be one,
> I'm content to just use the query string as sent by the user. I'll post
> a revised patch that does that soon.
Attached is the patch I applied to HEAD that uses the query string
supplied by the client, without any rewriting.
-Neil
============================================================
*** doc/src/sgml/catalogs.sgml 29fbade056e00ee4a48ba6a3f686627f62a103cf
--- doc/src/sgml/catalogs.sgml f265188b9a381a6c2e67f94290b56f9dc993f5d1
***************
*** 4373,4378 ****
--- 4373,4383 ----
</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>
***************
*** 4778,4783 ****
--- 4783,4883 ----
</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>
============================================================
*** doc/src/sgml/ref/prepare.sgml 17fce269c43549b6ffa7bf3d5770da9fbdf18896
--- doc/src/sgml/ref/prepare.sgml 98824b3ad9ac4ffa50677f3b8ac821f8a1c84e16
***************
*** 145,150 ****
--- 145,155 ----
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">
============================================================
*** src/backend/catalog/system_views.sql 307260ff7bc30a48c0c60a40d4130f70310ebff2
--- src/backend/catalog/system_views.sql 7b92550bbcaf9d0ee99c12527f7785385cfeefe7
***************
*** 156,161 ****
--- 156,167 ----
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
============================================================
*** src/backend/commands/prepare.c 3c1a8b677a84566407472a0b7b85b4cb86587956
--- src/backend/commands/prepare.c dc237de8d42ca2cd72d75e3b9bf64b8786702e5a
***************
*** 16,30 ****
*/
#include "postgres.h"
#include "commands/explain.h"
#include "commands/prepare.h"
#include "executor/executor.h"
! #include "utils/guc.h"
#include "optimizer/planner.h"
#include "rewrite/rewriteHandler.h"
#include "tcop/pquery.h"
#include "tcop/tcopprot.h"
#include "tcop/utility.h"
#include "utils/hsearch.h"
#include "utils/memutils.h"
--- 16,35 ----
*/
#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 "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"
***************
*** 40,45 ****
--- 45,51 ----
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.
***************
*** 114,120 ****
commandTag,
query_list,
plan_list,
! stmt->argtype_oids);
}
/*
--- 120,127 ----
commandTag,
query_list,
plan_list,
! stmt->argtype_oids,
! true);
}
/*
***************
*** 298,304 ****
const char *commandTag,
List *query_list,
List *plan_list,
! List *argtype_list)
{
PreparedStatement *entry;
MemoryContext oldcxt,
--- 305,312 ----
const char *commandTag,
List *query_list,
List *plan_list,
! List *argtype_list,
! bool from_sql)
{
PreparedStatement *entry;
MemoryContext oldcxt,
***************
*** 361,366 ****
--- 369,376 ----
entry->plan_list = plan_list;
entry->argtype_list = argtype_list;
entry->context = entrycxt;
+ entry->prepare_time = GetCurrentTimestamp();
+ entry->from_sql = from_sql;
MemoryContextSwitchTo(oldcxt);
}
***************
*** 383,389 ****
{
/*
* 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
* the appropriate length to work correctly.
*/
StrNCpy(key, stmt_name, sizeof(key));
--- 393,399 ----
{
/*
* We can't just use the statement name as supplied by the user: the
! * 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));
***************
*** 661,663 ****
--- 671,795 ----
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);
+ }
============================================================
*** src/backend/tcop/postgres.c f7e0f0dfaefca6014bb740974b51674d9856af52
--- src/backend/tcop/postgres.c 7e0c12bb20c7c728cb3c75a3b9fa3216cbb930c4
***************
*** 55,60 ****
--- 55,61 ----
#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"
***************
*** 1308,1314 ****
commandTag,
querytree_list,
plantree_list,
! param_list);
}
else
{
--- 1309,1316 ----
commandTag,
querytree_list,
plantree_list,
! param_list,
! false);
}
else
{
***************
*** 1322,1327 ****
--- 1324,1330 ----
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;
============================================================
*** src/include/catalog/catversion.h a927f31e147ee53ba1556ece5c1274ad51d3ac90
--- src/include/catalog/catversion.h ec1699040aae8697aac9fca28606a491e794bead
***************
*** 53,58 ****
*/
/* yyyymmddN */
! #define CATALOG_VERSION_NO 200512271
#endif
--- 53,58 ----
*/
/* yyyymmddN */
! #define CATALOG_VERSION_NO 200601081
#endif
============================================================
*** src/include/catalog/pg_proc.h cf6670bbb53ec82df8cef94c7816568e84f76649
--- src/include/catalog/pg_proc.h 30a03ca195666dbb6c2ce4c9276c59c85bf733a3
***************
*** 3617,3622 ****
--- 3617,3624 ----
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_ ));
============================================================
*** src/include/catalog/pg_type.h 8ec7dd1d4090cf8d0e42e8e942be80a242663181
--- src/include/catalog/pg_type.h b2c605634dd3fff9823efc37bffdc3df638c5e4d
***************
*** 406,411 ****
--- 406,412 ----
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_ ));
============================================================
*** src/include/commands/prepare.h 6efc9215b98662a9c339ca3c4e00565039d6d1af
--- src/include/commands/prepare.h 0edc3f720309bfdedcd06ea718a04e76a46479d0
***************
*** 30,42 ****
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 */
} PreparedStatement;
--- 30,45 ----
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, 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;
***************
*** 54,60 ****
const char *commandTag,
List *query_list,
List *plan_list,
! List *argtype_list);
extern PreparedStatement *FetchPreparedStatement(const char *stmt_name,
bool throwError);
extern void DropPreparedStatement(const char *stmt_name, bool showError);
--- 57,64 ----
const char *commandTag,
List *query_list,
List *plan_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);
============================================================
*** src/include/utils/builtins.h 59e351f3d080f64a8f9c60208697d98be3a74cc0
--- src/include/utils/builtins.h 435078a846fa3528c3f72253440c25979e4f90cc
***************
*** 861,864 ****
--- 861,867 ----
/* 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 */
============================================================
*** src/test/regress/expected/prepare.out 65183ee54b3fae638559a548c5326f0ad3f7ad17
--- src/test/regress/expected/prepare.out ac00879338b4a595a7115ff49820258b9fea4556
***************
*** 1,11 ****
! -- Regression tests for prepareable statements
! PREPARE q1 AS SELECT 1;
EXECUTE q1;
! ?column?
! ----------
! 1
(1 row)
-- should fail
PREPARE q1 AS SELECT 2;
ERROR: prepared statement "q1" already exists
--- 1,24 ----
! -- 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;
! 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
PREPARE q1 AS SELECT 2;
ERROR: prepared statement "q1" already exists
***************
*** 18,29 ****
--- 31,71 ----
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
------------+---------------+--------------
***************
*** 33,38 ****
--- 75,91 ----
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
---------+---------+-----+------+-----+--------+---------+----------+-------------+-----------+----------+-----+------+----------+----------+---------
============================================================
*** src/test/regress/expected/rules.out 50f1bbe53e81493d4e3ecd6f38ffedfdf78ba115
--- src/test/regress/expected/rules.out d2b7b350c3d01bd98ee6ceaa0e92acb34c2380f6
***************
*** 1280,1285 ****
--- 1280,1286 ----
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);
***************
*** 1320,1326 ****
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)
SELECT tablename, rulename, definition FROM pg_rules
ORDER BY tablename, rulename;
--- 1321,1327 ----
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;
! (45 rows)
SELECT tablename, rulename, definition FROM pg_rules
ORDER BY tablename, rulename;
============================================================
*** src/test/regress/sql/prepare.sql 77e19c33d5c686ea3013cefc80d4df7b997cc7b2
--- src/test/regress/sql/prepare.sql 90bc73b518b0d7ef0c1ede82d5ae088392ea3910
***************
*** 1,8 ****
! -- Regression tests for prepareable statements
! PREPARE q1 AS SELECT 1;
EXECUTE q1;
-- should fail
PREPARE q1 AS SELECT 2;
--- 1,14 ----
! -- 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;
!
! 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;
***************
*** 11,29 ****
--- 17,49 ----
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
---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
