diff --git a/doc/src/sgml/catalogs.sgml b/doc/src/sgml/catalogs.sgml
index c5473b9501b29958f25c3e24f3dfb3bec8ed63bf..2b1318b05e4f87b6832063ff1ae491e3ae200696 100644
--- a/doc/src/sgml/catalogs.sgml
+++ b/doc/src/sgml/catalogs.sgml
@@ -1,6 +1,6 @@
<!--
Documentation of the system catalogs, directed toward PostgreSQL developers
- $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.104 2005/06/17 22:32:41 tgl Exp $
+ $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.105 2005/06/18 19:33:41 tgl Exp $
-->
<chapter id="catalogs">
@@ -4090,7 +4090,7 @@
<literal>extend</>,
<literal>page</>,
<literal>tuple</>,
- <literal>transaction</>,
+ <literal>transactionid</>,
<literal>object</>, or
<literal>userlock</>
</entry>
@@ -4132,7 +4132,7 @@
</entry>
</row>
<row>
- <entry><structfield>transaction</structfield></entry>
+ <entry><structfield>transactionid</structfield></entry>
<entry><type>xid</type></entry>
<entry></entry>
<entry>
@@ -4168,13 +4168,21 @@
zero. NULL if the object is not a general database object
</entry>
</row>
+ <row>
+ <entry><structfield>transaction</structfield></entry>
+ <entry><type>xid</type></entry>
+ <entry></entry>
+ <entry>
+ ID of the transaction that is holding or awaiting this lock.
+ </entry>
+ </row>
<row>
<entry><structfield>pid</structfield></entry>
<entry><type>integer</type></entry>
<entry></entry>
<entry>
Process ID of the server process holding or awaiting this
- lock. Zero if the lock is held by a prepared transaction.
+ lock. Null if the lock is held by a prepared transaction.
</entry>
</row>
<row>
@@ -4196,12 +4204,12 @@
<para>
<structfield>granted</structfield> is true in a row representing a lock
- held by the indicated session. False indicates that this session is
+ held by the indicated transaction. False indicates that this transaction is
currently waiting to acquire this lock, which implies that some other
- session is holding a conflicting lock mode on the same lockable object.
- The waiting session will sleep until the other lock is released (or a
- deadlock situation is detected). A single session can be waiting to acquire
- at most one lock at a time.
+ transaction is holding a conflicting lock mode on the same lockable object.
+ The waiting transaction will sleep until the other lock is released (or a
+ deadlock situation is detected). A single transaction can be waiting to
+ acquire at most one lock at a time.
</para>
<para>
@@ -4253,6 +4261,13 @@
<structfield>procpid</structfield> column of the
<structname>pg_stat_activity</structname> view to get more
information on the session holding or waiting to hold the lock.
+ Also, if you are using prepared transactions, the
+ <structfield>transaction</> column can be joined to the
+ <structfield>transaction</structfield> column of the
+ <structname>pg_prepared_xacts</structname> view to get more
+ information on prepared transactions that hold locks.
+ (A prepared transaction can never be waiting for a lock,
+ but it continues to hold the locks it acquired while running.)
</para>
</sect1>
@@ -4306,6 +4321,14 @@
Global transaction identifier that was assigned to the transaction
</entry>
</row>
+ <row>
+ <entry><structfield>prepared</structfield></entry>
+ <entry><type>timestamp with time zone</type></entry>
+ <entry></entry>
+ <entry>
+ Time at which the transaction was prepared for commit
+ </entry>
+ </row>
<row>
<entry><structfield>owner</structfield></entry>
<entry><type>name</type></entry>
diff --git a/src/backend/access/transam/twophase.c b/src/backend/access/transam/twophase.c
index 388d9352ce962b9ff26e030ecc4ea051a0d77bc1..30bc21b5244971a417f8543ec0643db176183f73 100644
--- a/src/backend/access/transam/twophase.c
+++ b/src/backend/access/transam/twophase.c
@@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/access/transam/twophase.c,v 1.2 2005/06/18 05:21:09 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/access/transam/twophase.c,v 1.3 2005/06/18 19:33:41 tgl Exp $
*
* NOTES
* Each global transaction is associated with a global transaction
@@ -104,6 +104,7 @@ int max_prepared_xacts = 50;
typedef struct GlobalTransactionData
{
PGPROC proc; /* dummy proc */
+ TimestampTz prepared_at; /* time of preparation */
AclId owner; /* ID of user that executed the xact */
TransactionId locking_xid; /* top-level XID of backend working on xact */
bool valid; /* TRUE if fully prepared */
@@ -202,7 +203,8 @@ TwoPhaseShmemInit(void)
* assuming that we can use very much backend context.
*/
GlobalTransaction
-MarkAsPreparing(TransactionId xid, Oid databaseid, char *gid, AclId owner)
+MarkAsPreparing(TransactionId xid, const char *gid,
+ TimestampTz prepared_at, AclId owner, Oid databaseid)
{
GlobalTransaction gxact;
int i;
@@ -278,6 +280,7 @@ MarkAsPreparing(TransactionId xid, Oid databaseid, char *gid, AclId owner)
gxact->proc.subxids.overflowed = false;
gxact->proc.subxids.nxids = 0;
+ gxact->prepared_at = prepared_at;
gxact->owner = owner;
gxact->locking_xid = xid;
gxact->valid = false;
@@ -342,7 +345,7 @@ MarkAsPrepared(GlobalTransaction gxact)
* Locate the prepared transaction and mark it busy for COMMIT or PREPARE.
*/
static GlobalTransaction
-LockGXact(char *gid, AclId user)
+LockGXact(const char *gid, AclId user)
{
int i;
@@ -509,14 +512,16 @@ pg_prepared_xact(PG_FUNCTION_ARGS)
/* build tupdesc for result tuples */
/* this had better match pg_prepared_xacts view in system_views.sql */
- tupdesc = CreateTemplateTupleDesc(4, false);
+ tupdesc = CreateTemplateTupleDesc(5, false);
TupleDescInitEntry(tupdesc, (AttrNumber) 1, "transaction",
XIDOID, -1, 0);
TupleDescInitEntry(tupdesc, (AttrNumber) 2, "gid",
TEXTOID, -1, 0);
- TupleDescInitEntry(tupdesc, (AttrNumber) 3, "ownerid",
+ TupleDescInitEntry(tupdesc, (AttrNumber) 3, "prepared",
+ TIMESTAMPTZOID, -1, 0);
+ TupleDescInitEntry(tupdesc, (AttrNumber) 4, "ownerid",
INT4OID, -1, 0);
- TupleDescInitEntry(tupdesc, (AttrNumber) 4, "dbid",
+ TupleDescInitEntry(tupdesc, (AttrNumber) 5, "dbid",
OIDOID, -1, 0);
funcctx->tuple_desc = BlessTupleDesc(tupdesc);
@@ -540,8 +545,8 @@ pg_prepared_xact(PG_FUNCTION_ARGS)
while (status->array != NULL && status->currIdx < status->ngxacts)
{
GlobalTransaction gxact = &status->array[status->currIdx++];
- Datum values[4];
- bool nulls[4];
+ Datum values[5];
+ bool nulls[5];
HeapTuple tuple;
Datum result;
@@ -556,8 +561,9 @@ pg_prepared_xact(PG_FUNCTION_ARGS)
values[0] = TransactionIdGetDatum(gxact->proc.xid);
values[1] = DirectFunctionCall1(textin, CStringGetDatum(gxact->gid));
- values[2] = Int32GetDatum(gxact->owner);
- values[3] = ObjectIdGetDatum(gxact->proc.databaseId);
+ values[2] = TimestampTzGetDatum(gxact->prepared_at);
+ values[3] = Int32GetDatum(gxact->owner);
+ values[4] = ObjectIdGetDatum(gxact->proc.databaseId);
tuple = heap_form_tuple(funcctx->tuple_desc, values, nulls);
result = HeapTupleGetDatum(tuple);
@@ -636,7 +642,7 @@ TwoPhaseGetDummyProc(TransactionId xid)
/*
* Header for a 2PC state file
*/
-#define TWOPHASE_MAGIC 0x57F94530 /* format identifier */
+#define TWOPHASE_MAGIC 0x57F94531 /* format identifier */
typedef struct TwoPhaseFileHeader
{
@@ -644,6 +650,7 @@ typedef struct TwoPhaseFileHeader
uint32 total_len; /* actual file length */
TransactionId xid; /* original transaction XID */
Oid database; /* OID of database it was in */
+ TimestampTz prepared_at; /* time of preparation */
AclId owner; /* user running the transaction */
int32 nsubxacts; /* number of following subxact XIDs */
int32 ncommitrels; /* number of delete-on-commit rels */
@@ -741,8 +748,9 @@ StartPrepare(GlobalTransaction gxact)
hdr.magic = TWOPHASE_MAGIC;
hdr.total_len = 0; /* EndPrepare will fill this in */
hdr.xid = xid;
- hdr.database = MyDatabaseId;
- hdr.owner = GetUserId();
+ hdr.database = gxact->proc.databaseId;
+ hdr.prepared_at = gxact->prepared_at;
+ hdr.owner = gxact->owner;
hdr.nsubxacts = xactGetCommittedChildren(&children);
hdr.ncommitrels = smgrGetPendingDeletes(true, &commitrels);
hdr.nabortrels = smgrGetPendingDeletes(false, &abortrels);
@@ -1046,7 +1054,7 @@ ReadTwoPhaseFile(TransactionId xid)
* FinishPreparedTransaction: execute COMMIT PREPARED or ROLLBACK PREPARED
*/
void
-FinishPreparedTransaction(char *gid, bool isCommit)
+FinishPreparedTransaction(const char *gid, bool isCommit)
{
GlobalTransaction gxact;
TransactionId xid;
@@ -1474,7 +1482,10 @@ RecoverPreparedTransactions(void)
/*
* Reconstruct subtrans state for the transaction --- needed
- * because pg_subtrans is not preserved over a restart
+ * because pg_subtrans is not preserved over a restart. Note
+ * that we are linking all the subtransactions directly to the
+ * top-level XID; there may originally have been a more complex
+ * hierarchy, but there's no need to restore that exactly.
*/
for (i = 0; i < hdr->nsubxacts; i++)
SubTransSetParent(subxids[i], xid);
@@ -1482,7 +1493,9 @@ RecoverPreparedTransactions(void)
/*
* Recreate its GXACT and dummy PGPROC
*/
- gxact = MarkAsPreparing(xid, hdr->database, hdr->gid, hdr->owner);
+ gxact = MarkAsPreparing(xid, hdr->gid,
+ hdr->prepared_at,
+ hdr->owner, hdr->database);
GXactLoadSubxactData(gxact, hdr->nsubxacts, subxids);
MarkAsPrepared(gxact);
diff --git a/src/backend/access/transam/xact.c b/src/backend/access/transam/xact.c
index 74163b7f576f4bda6f2589a9305c89b6a267efa5..2f73ee10c063f60c35c7776765a04a003b0ba7af 100644
--- a/src/backend/access/transam/xact.c
+++ b/src/backend/access/transam/xact.c
@@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/access/transam/xact.c,v 1.205 2005/06/17 22:32:42 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/access/transam/xact.c,v 1.206 2005/06/18 19:33:41 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -1630,6 +1630,9 @@ PrepareTransaction(void)
TransactionState s = CurrentTransactionState;
TransactionId xid = GetCurrentTransactionId();
GlobalTransaction gxact;
+ TimestampTz prepared_at;
+ AbsoluteTime PreparedSec; /* integer part */
+ int PreparedUSec; /* microsecond part */
ShowTransactionState("PrepareTransaction");
@@ -1692,6 +1695,9 @@ PrepareTransaction(void)
*/
s->state = TRANS_PREPARE;
+ PreparedSec = GetCurrentAbsoluteTimeUsec(&PreparedUSec);
+ prepared_at = AbsoluteTimeUsecToTimestampTz(PreparedSec, PreparedUSec);
+
/* Tell bufmgr and smgr to prepare for commit */
BufmgrCommit();
@@ -1699,7 +1705,8 @@ PrepareTransaction(void)
* Reserve the GID for this transaction. This could fail if the
* requested GID is invalid or already in use.
*/
- gxact = MarkAsPreparing(xid, MyDatabaseId, prepareGID, GetUserId());
+ gxact = MarkAsPreparing(xid, prepareGID, prepared_at,
+ GetUserId(), MyDatabaseId);
prepareGID = NULL;
/*
diff --git a/src/backend/catalog/system_views.sql b/src/backend/catalog/system_views.sql
index 2e9a3ecf7c704e16c827bd24c259eac52dd20811..f757e21039d716e0a5aaef9739355e3e754868f2 100644
--- a/src/backend/catalog/system_views.sql
+++ b/src/backend/catalog/system_views.sql
@@ -3,7 +3,7 @@
*
* Copyright (c) 1996-2005, PostgreSQL Global Development Group
*
- * $PostgreSQL: pgsql/src/backend/catalog/system_views.sql,v 1.14 2005/06/17 22:32:43 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/catalog/system_views.sql,v 1.15 2005/06/18 19:33:42 tgl Exp $
*/
CREATE VIEW pg_user AS
@@ -106,15 +106,16 @@ CREATE VIEW pg_locks AS
SELECT *
FROM pg_lock_status() AS L
(locktype text, database oid, relation oid, page int4, tuple int2,
- transaction xid, classid oid, objid oid, objsubid int2,
- pid int4, mode text, granted boolean);
+ transactionid xid, classid oid, objid oid, objsubid int2,
+ transaction xid, pid int4, mode text, granted boolean);
CREATE VIEW pg_prepared_xacts AS
- SELECT P.transaction, P.gid, U.usename AS owner, D.datname AS database
+ SELECT P.transaction, P.gid, P.prepared,
+ U.usename AS owner, D.datname AS database
FROM pg_prepared_xact() AS P
- (transaction xid, gid text, ownerid int4, dbid oid)
- LEFT JOIN pg_database D ON P.dbid = D.oid
- LEFT JOIN pg_shadow U ON P.ownerid = U.usesysid;
+ (transaction xid, gid text, prepared timestamptz, ownerid int4, dbid oid)
+ LEFT JOIN pg_shadow U ON P.ownerid = U.usesysid
+ LEFT JOIN pg_database D ON P.dbid = D.oid;
CREATE VIEW pg_settings AS
SELECT *
diff --git a/src/backend/utils/adt/lockfuncs.c b/src/backend/utils/adt/lockfuncs.c
index e941ec2d3d86fba99b664687c7c11794039e95d3..0bdf918e475f330520a8db4a9cca46fba156afd0 100644
--- a/src/backend/utils/adt/lockfuncs.c
+++ b/src/backend/utils/adt/lockfuncs.c
@@ -6,7 +6,7 @@
* Copyright (c) 2002-2005, PostgreSQL Global Development Group
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/utils/adt/lockfuncs.c,v 1.18 2005/05/17 21:46:10 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/adt/lockfuncs.c,v 1.19 2005/06/18 19:33:42 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -26,7 +26,7 @@ static const char * const LockTagTypeNames[] = {
"extend",
"page",
"tuple",
- "transaction",
+ "transactionid",
"object",
"userlock"
};
@@ -64,7 +64,7 @@ pg_lock_status(PG_FUNCTION_ARGS)
/* build tupdesc for result tuples */
/* this had better match pg_locks view in system_views.sql */
- tupdesc = CreateTemplateTupleDesc(12, false);
+ tupdesc = CreateTemplateTupleDesc(13, false);
TupleDescInitEntry(tupdesc, (AttrNumber) 1, "locktype",
TEXTOID, -1, 0);
TupleDescInitEntry(tupdesc, (AttrNumber) 2, "database",
@@ -75,7 +75,7 @@ pg_lock_status(PG_FUNCTION_ARGS)
INT4OID, -1, 0);
TupleDescInitEntry(tupdesc, (AttrNumber) 5, "tuple",
INT2OID, -1, 0);
- TupleDescInitEntry(tupdesc, (AttrNumber) 6, "transaction",
+ TupleDescInitEntry(tupdesc, (AttrNumber) 6, "transactionid",
XIDOID, -1, 0);
TupleDescInitEntry(tupdesc, (AttrNumber) 7, "classid",
OIDOID, -1, 0);
@@ -83,11 +83,13 @@ pg_lock_status(PG_FUNCTION_ARGS)
OIDOID, -1, 0);
TupleDescInitEntry(tupdesc, (AttrNumber) 9, "objsubid",
INT2OID, -1, 0);
- TupleDescInitEntry(tupdesc, (AttrNumber) 10, "pid",
+ TupleDescInitEntry(tupdesc, (AttrNumber) 10, "transaction",
+ XIDOID, -1, 0);
+ TupleDescInitEntry(tupdesc, (AttrNumber) 11, "pid",
INT4OID, -1, 0);
- TupleDescInitEntry(tupdesc, (AttrNumber) 11, "mode",
+ TupleDescInitEntry(tupdesc, (AttrNumber) 12, "mode",
TEXTOID, -1, 0);
- TupleDescInitEntry(tupdesc, (AttrNumber) 12, "granted",
+ TupleDescInitEntry(tupdesc, (AttrNumber) 13, "granted",
BOOLOID, -1, 0);
funcctx->tuple_desc = BlessTupleDesc(tupdesc);
@@ -118,8 +120,8 @@ pg_lock_status(PG_FUNCTION_ARGS)
LOCKMODE mode = 0;
const char *locktypename;
char tnbuf[32];
- Datum values[12];
- char nulls[12];
+ Datum values[13];
+ char nulls[13];
HeapTuple tuple;
Datum result;
@@ -249,10 +251,14 @@ pg_lock_status(PG_FUNCTION_ARGS)
break;
}
- values[9] = Int32GetDatum(proc->pid);
- values[10] = DirectFunctionCall1(textin,
+ values[9] = TransactionIdGetDatum(proc->xid);
+ if (proc->pid != 0)
+ values[10] = Int32GetDatum(proc->pid);
+ else
+ nulls[10] = 'n';
+ values[11] = DirectFunctionCall1(textin,
CStringGetDatum(GetLockmodeName(mode)));
- values[11] = BoolGetDatum(granted);
+ values[12] = BoolGetDatum(granted);
tuple = heap_formtuple(funcctx->tuple_desc, values, nulls);
result = HeapTupleGetDatum(tuple);
diff --git a/src/include/access/twophase.h b/src/include/access/twophase.h
index ac2e05f33ce68223b2a7825c4972c3398ee3e261..d7c64f2b12edd3134612a750873c5675128d30f8 100644
--- a/src/include/access/twophase.h
+++ b/src/include/access/twophase.h
@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/access/twophase.h,v 1.1 2005/06/17 22:32:48 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/access/twophase.h,v 1.2 2005/06/18 19:33:42 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -15,6 +15,7 @@
#define TWOPHASE_H
#include "storage/lock.h"
+#include "utils/timestamp.h"
/*
@@ -31,8 +32,9 @@ extern void TwoPhaseShmemInit(void);
extern PGPROC *TwoPhaseGetDummyProc(TransactionId xid);
-extern GlobalTransaction MarkAsPreparing(TransactionId xid, Oid databaseid,
- char *gid, AclId owner);
+extern GlobalTransaction MarkAsPreparing(TransactionId xid, const char *gid,
+ TimestampTz prepared_at,
+ AclId owner, Oid databaseid);
extern void MarkAsPrepared(GlobalTransaction gxact);
extern void StartPrepare(GlobalTransaction gxact);
@@ -44,6 +46,6 @@ extern void RecoverPreparedTransactions(void);
extern void RecreateTwoPhaseFile(TransactionId xid, void *content, int len);
extern void RemoveTwoPhaseFile(TransactionId xid, bool giveWarning);
-extern void FinishPreparedTransaction(char *gid, bool isCommit);
+extern void FinishPreparedTransaction(const char *gid, bool isCommit);
#endif /* TWOPHASE_H */
diff --git a/src/include/catalog/catversion.h b/src/include/catalog/catversion.h
index de422a41a9f3ddb0bac5cc53cc2dac5a704f7fdd..bdbaa83ace87e0694ef9cd951079bfb8a42f5176 100644
--- a/src/include/catalog/catversion.h
+++ b/src/include/catalog/catversion.h
@@ -37,7 +37,7 @@
* 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 1.277 2005/06/17 22:32:48 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.278 2005/06/18 19:33:42 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -53,6 +53,6 @@
*/
/* yyyymmddN */
-#define CATALOG_VERSION_NO 200506171
+#define CATALOG_VERSION_NO 200506181
#endif
diff --git a/src/test/regress/expected/rules.out b/src/test/regress/expected/rules.out
index acd2d25b35de296439accebd28eb28b9d5831baa..384ce37d9c29046d988155906723cb202daf9eda 100644
--- a/src/test/regress/expected/rules.out
+++ b/src/test/regress/expected/rules.out
@@ -1278,8 +1278,8 @@ SELECT viewname, definition FROM pg_views WHERE schemaname <> 'information_schem
--------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
iexit | SELECT ih.name, ih.thepath, interpt_pp(ih.thepath, r.thepath) AS exit FROM ihighway ih, ramp r WHERE (ih.thepath ## r.thepath);
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."transaction", l.classid, l.objid, l.objsubid, l.pid, l."mode", l.granted FROM pg_lock_status() l(locktype text, "database" oid, relation oid, page integer, tuple smallint, "transaction" xid, classid oid, objid oid, objsubid smallint, pid integer, "mode" text, granted boolean);
- pg_prepared_xacts | SELECT p."transaction", p.gid, u.usename AS "owner", d.datname AS "database" FROM ((pg_prepared_xact() p("transaction" xid, gid text, ownerid integer, dbid oid) LEFT JOIN pg_database d ON ((p.dbid = d.oid))) LEFT JOIN pg_shadow u ON ((p.ownerid = u.usesysid)));
+ 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_xacts | SELECT p."transaction", p.gid, p."prepared", u.usename AS "owner", d.datname AS "database" FROM ((pg_prepared_xact() p("transaction" xid, gid text, "prepared" timestamp with time zone, ownerid integer, dbid oid) LEFT JOIN pg_shadow u ON ((p.ownerid = u.usesysid))) LEFT JOIN pg_database d ON ((p.dbid = d.oid)));
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);
pg_settings | SELECT a.name, a.setting, a.category, a.short_desc, a.extra_desc, a.context, a.vartype, a.source, a.min_val, a.max_val FROM pg_show_all_settings() a(name text, setting text, category text, short_desc text, extra_desc text, context text, vartype text, source text, min_val text, max_val text);
pg_stat_activity | SELECT d.oid AS datid, d.datname, pg_stat_get_backend_pid(s.backendid) AS procpid, pg_stat_get_backend_userid(s.backendid) AS usesysid, u.usename, pg_stat_get_backend_activity(s.backendid) AS current_query, pg_stat_get_backend_activity_start(s.backendid) AS query_start, pg_stat_get_backend_start(s.backendid) AS backend_start, pg_stat_get_backend_client_addr(s.backendid) AS client_addr, pg_stat_get_backend_client_port(s.backendid) AS client_port FROM pg_database d, (SELECT pg_stat_get_backend_idset() AS backendid) s, pg_shadow u WHERE ((pg_stat_get_backend_dbid(s.backendid) = d.oid) AND (pg_stat_get_backend_userid(s.backendid) = u.usesysid));