WIP partial replication patch

diff -dcrpN pgsql/src/backend/access/heap/heapam.c pgsql-partial/src/backend/access/heap/heapam.c
*** pgsql/src/backend/access/heap/heapam.c	2010-07-29 21:08:05.000000000 +0200
--- pgsql-partial/src/backend/access/heap/heapam.c	2010-08-12 20:12:45.000000000 +0200
***************
*** 51,57 ****
--- 51,61 ----
  #include "access/xact.h"
  #include "access/xlogutils.h"
  #include "catalog/catalog.h"
+ #include "catalog/indexing.h"
  #include "catalog/namespace.h"
+ #include "catalog/pg_replica.h"
+ #include "catalog/pg_replicaitem.h"
+ #include "catalog/pg_replica_fn.h"
  #include "miscadmin.h"
  #include "pgstat.h"
  #include "storage/bufmgr.h"
*************** heap_xlog_newpage(XLogRecPtr lsn, XLogRe
*** 4264,4269 ****
--- 4268,4284 ----
  	 * Note: the NEWPAGE log record is used for both heaps and indexes, so do
  	 * not do anything that assumes we are touching a heap.
  	 */
+ 	if (OidIsValid(standby_replica_classoid))
+ 	{
+ 		bool    exists;
+ 
+ 		exists = replica_item_exists(standby_replica_classoid,
+ 									xlrec->node.dbNode,
+ 									xlrec->node.relNode);
+ 		if (exists)
+ 			return;
+ 	}
+ 
  	buffer = XLogReadBufferExtended(xlrec->node, xlrec->forknum, xlrec->blkno,
  									RBM_ZERO);
  	Assert(BufferIsValid(buffer));
*************** heap_xlog_delete(XLogRecPtr lsn, XLogRec
*** 4298,4303 ****
--- 4313,4337 ----
  	HeapTupleHeader htup;
  	BlockNumber blkno;
  
+ 	if (OidIsValid(standby_replica_classoid))
+ 	{
+ 		bool    exists;
+ 
+ 		/* Don't allow deleting from pg_replica or pg_replicaitem or their indexes */
+ 		if (xlrec->target.node.relNode == ReplicaRelationId ||
+ 			xlrec->target.node.relNode == ReplicaOidIndexId ||
+ 			xlrec->target.node.relNode == ReplicaClassnameIndexId ||
+ 			xlrec->target.node.relNode == ReplicaItemRelationId ||
+ 			xlrec->target.node.relNode == ReplicaItemIndexId)
+ 			return;
+ 
+ 		exists = replica_item_exists(standby_replica_classoid,
+ 									xlrec->target.node.dbNode,
+ 									xlrec->target.node.relNode);
+ 		if (exists)
+ 			return;
+ 	}
+ 
  	blkno = ItemPointerGetBlockNumber(&(xlrec->target.tid));
  
  	/*
*************** heap_xlog_insert(XLogRecPtr lsn, XLogRec
*** 4376,4381 ****
--- 4410,4426 ----
  	Size		freespace;
  	BlockNumber blkno;
  
+ 	if (OidIsValid(standby_replica_classoid))
+ 	{
+ 		bool    exists;
+ 
+ 		exists = replica_item_exists(standby_replica_classoid,
+ 									xlrec->target.node.dbNode,
+ 									xlrec->target.node.relNode);
+ 		if (exists)
+ 			return;
+ 	}
+ 
  	blkno = ItemPointerGetBlockNumber(&(xlrec->target.tid));
  
  	/*
*************** heap_xlog_update(XLogRecPtr lsn, XLogRec
*** 4490,4495 ****
--- 4535,4551 ----
  	uint32		newlen;
  	Size		freespace;
  
+ 	if (OidIsValid(standby_replica_classoid))
+ 	{
+ 		bool    exists;
+ 
+ 		exists = replica_item_exists(standby_replica_classoid,
+ 									xlrec->target.node.dbNode,
+ 									xlrec->target.node.relNode);
+ 		if (exists)
+ 			return;
+ 	}
+ 
  	/*
  	 * The visibility map may need to be fixed even if the heap page is
  	 * already up-to-date.
*************** heap_xlog_lock(XLogRecPtr lsn, XLogRecor
*** 4685,4690 ****
--- 4741,4757 ----
  	ItemId		lp = NULL;
  	HeapTupleHeader htup;
  
+ 	if (OidIsValid(standby_replica_classoid))
+ 	{
+ 		bool    exists;
+ 
+ 		exists = replica_item_exists(standby_replica_classoid,
+ 									xlrec->target.node.dbNode,
+ 									xlrec->target.node.relNode);
+ 		if (exists)
+ 			return;
+ 	}
+ 
  	if (record->xl_info & XLR_BKP_BLOCK_1)
  		return;
  
*************** heap_xlog_inplace(XLogRecPtr lsn, XLogRe
*** 4744,4749 ****
--- 4811,4827 ----
  	uint32		oldlen;
  	uint32		newlen;
  
+ 	if (OidIsValid(standby_replica_classoid))
+ 	{
+ 		bool    exists;
+ 
+ 		exists = replica_item_exists(standby_replica_classoid,
+ 									xlrec->target.node.dbNode,
+ 									xlrec->target.node.relNode);
+ 		if (exists)
+ 			return;
+ 	}
+ 
  	if (record->xl_info & XLR_BKP_BLOCK_1)
  		return;
  
diff -dcrpN pgsql/src/backend/access/transam/xact.c pgsql-partial/src/backend/access/transam/xact.c
*** pgsql/src/backend/access/transam/xact.c	2010-08-11 07:21:54.000000000 +0200
--- pgsql-partial/src/backend/access/transam/xact.c	2010-08-12 19:54:52.000000000 +0200
***************
*** 28,33 ****
--- 28,34 ----
  #include "access/xlogutils.h"
  #include "catalog/catalog.h"
  #include "catalog/namespace.h"
+ #include "catalog/pg_replica_fn.h"
  #include "catalog/storage.h"
  #include "commands/async.h"
  #include "commands/tablecmds.h"
*************** xact_redo_commit(xl_xact_commit *xlrec, 
*** 4498,4503 ****
--- 4499,4515 ----
  
  		for (fork = 0; fork <= MAX_FORKNUM; fork++)
  		{
+ 			if (OidIsValid(standby_replica_classoid))
+ 			{
+ 				bool	exists;
+ 
+ 				exists = replica_item_exists(standby_replica_classoid,
+ 									xlrec->xnodes[i].dbNode,
+ 									xlrec->xnodes[i].relNode);
+ 				if (exists)
+ 					continue;
+ 			}
+ 
  			if (smgrexists(srel, fork))
  			{
  				XLogDropRelation(xlrec->xnodes[i], fork);
*************** xact_redo_abort(xl_xact_abort *xlrec, Tr
*** 4603,4608 ****
--- 4615,4631 ----
  
  		for (fork = 0; fork <= MAX_FORKNUM; fork++)
  		{
+ 			if (OidIsValid(standby_replica_classoid))
+ 			{
+ 				bool	exists;
+ 
+ 				exists = replica_item_exists(standby_replica_classoid,
+ 									xlrec->xnodes[i].dbNode,
+ 									xlrec->xnodes[i].relNode);
+ 				if (exists)
+ 					continue;
+ 			}
+ 
  			if (smgrexists(srel, fork))
  			{
  				XLogDropRelation(xlrec->xnodes[i], fork);
diff -dcrpN pgsql/src/backend/access/transam/xlog.c pgsql-partial/src/backend/access/transam/xlog.c
*** pgsql/src/backend/access/transam/xlog.c	2010-08-11 07:19:26.000000000 +0200
--- pgsql-partial/src/backend/access/transam/xlog.c	2010-08-12 19:30:58.000000000 +0200
***************
*** 35,40 ****
--- 35,41 ----
  #include "catalog/catversion.h"
  #include "catalog/pg_control.h"
  #include "catalog/pg_database.h"
+ #include "catalog/pg_replica_fn.h"
  #include "catalog/pg_type.h"
  #include "funcapi.h"
  #include "libpq/pqsignal.h"
***************
*** 53,59 ****
--- 54,62 ----
  #include "utils/builtins.h"
  #include "utils/guc.h"
  #include "utils/ps_status.h"
+ #include "utils/relcache.h"
  #include "utils/relmapper.h"
+ #include "utils/snapmgr.h"
  #include "pg_trace.h"
  
  
*************** TimeLineID	ThisTimeLineID = 0;
*** 147,152 ****
--- 150,161 ----
   */
  bool		InRecovery = false;
  
+ /*
+  * Replication filtering class set in recovery.conf
+  */
+ char	   *standby_replica_classname = NULL;
+ Oid		standby_replica_classoid = InvalidOid;
+ 
  /* Are we in Hot Standby mode? Only valid in startup process, see xlog.h */
  HotStandbyState standbyState = STANDBY_DISABLED;
  
*************** readRecoveryCommandFile(void)
*** 5286,5291 ****
--- 5295,5307 ----
  			ereport(DEBUG2,
  					(errmsg("replication_mode = '%s'", tok2)));
  		}
+ 		else if (strcmp(tok1, "filtering_class") == 0)
+ 		{
+ 			standby_replica_classname = pstrdup(tok2);
+ 			ereport(DEBUG2,
+ 					(errmsg("filtering_class name = '%s'",
+ 							standby_replica_classname)));
+ 		}
  		else
  			ereport(FATAL,
  					(errmsg("unrecognized recovery parameter \"%s\"",
*************** StartupXLOG(void)
*** 6145,6150 ****
--- 6161,6185 ----
  			SetForwardFsyncRequests();
  			SendPostmasterSignal(PMSIGNAL_RECOVERY_STARTED);
  			bgwriterLaunched = true;
+ 
+ 			/*
+ 			 * If we have a filtering class name then set up the connection
+ 			 * to the replication database and read the Oid of the class from
+ 			 * pg_replica. Later, in the rm_redo() calls, the pg_replicaitem rows
+ 			 * will be checked.
+ 			 */
+ 			if (standby_replica_classname)
+ 			{
+ 				ereport(LOG, (errmsg("activating partial replication")));
+ 
+ 				/* Set up the connection to our private hardcoded database */
+ 				InitPostgresForPartialReplication();
+ 
+ 				StartTransactionCommand();
+ 				(void) GetTransactionSnapshot();
+ 				standby_replica_classoid = get_replica_class_oid(standby_replica_classname);
+ 				CommitTransactionCommand();
+ 			}
  		}
  
  		/*
diff -dcrpN pgsql/src/backend/catalog/catalog.c pgsql-partial/src/backend/catalog/catalog.c
*** pgsql/src/backend/catalog/catalog.c	2010-04-21 08:43:41.000000000 +0200
--- pgsql-partial/src/backend/catalog/catalog.c	2010-08-11 07:39:21.000000000 +0200
***************
*** 32,37 ****
--- 32,39 ----
  #include "catalog/pg_namespace.h"
  #include "catalog/pg_pltemplate.h"
  #include "catalog/pg_db_role_setting.h"
+ #include "catalog/pg_replica.h"
+ #include "catalog/pg_replicaitem.h"
  #include "catalog/pg_shdepend.h"
  #include "catalog/pg_shdescription.h"
  #include "catalog/pg_tablespace.h"
*************** IsSharedRelation(Oid relationId)
*** 309,315 ****
  		relationId == SharedDescriptionRelationId ||
  		relationId == SharedDependRelationId ||
  		relationId == TableSpaceRelationId ||
! 		relationId == DbRoleSettingRelationId)
  		return true;
  	/* These are their indexes (see indexing.h) */
  	if (relationId == AuthIdRolnameIndexId ||
--- 311,319 ----
  		relationId == SharedDescriptionRelationId ||
  		relationId == SharedDependRelationId ||
  		relationId == TableSpaceRelationId ||
! 		relationId == DbRoleSettingRelationId ||
! 		relationId == ReplicaRelationId ||
! 		relationId == ReplicaItemRelationId)
  		return true;
  	/* These are their indexes (see indexing.h) */
  	if (relationId == AuthIdRolnameIndexId ||
*************** IsSharedRelation(Oid relationId)
*** 324,330 ****
  		relationId == SharedDependReferenceIndexId ||
  		relationId == TablespaceOidIndexId ||
  		relationId == TablespaceNameIndexId ||
! 		relationId == DbRoleSettingDatidRolidIndexId)
  		return true;
  	/* These are their toast tables and toast indexes (see toasting.h) */
  	if (relationId == PgDatabaseToastTable ||
--- 328,337 ----
  		relationId == SharedDependReferenceIndexId ||
  		relationId == TablespaceOidIndexId ||
  		relationId == TablespaceNameIndexId ||
! 		relationId == DbRoleSettingDatidRolidIndexId ||
! 		relationId == ReplicaOidIndexId ||
! 		relationId == ReplicaClassnameIndexId ||
! 		relationId == ReplicaItemIndexId)
  		return true;
  	/* These are their toast tables and toast indexes (see toasting.h) */
  	if (relationId == PgDatabaseToastTable ||
diff -dcrpN pgsql/src/backend/catalog/Makefile pgsql-partial/src/backend/catalog/Makefile
*** pgsql/src/backend/catalog/Makefile	2010-05-14 11:05:06.000000000 +0200
--- pgsql-partial/src/backend/catalog/Makefile	2010-08-11 07:39:21.000000000 +0200
*************** include $(top_builddir)/src/Makefile.glo
*** 13,19 ****
  OBJS = catalog.o dependency.o heap.o index.o indexing.o namespace.o aclchk.o \
         pg_aggregate.o pg_constraint.o pg_conversion.o pg_depend.o pg_enum.o \
         pg_inherits.o pg_largeobject.o pg_namespace.o pg_operator.o pg_proc.o \
!        pg_db_role_setting.o pg_shdepend.o pg_type.o storage.o toasting.o
  
  BKIFILES = postgres.bki postgres.description postgres.shdescription
  
--- 13,19 ----
  OBJS = catalog.o dependency.o heap.o index.o indexing.o namespace.o aclchk.o \
         pg_aggregate.o pg_constraint.o pg_conversion.o pg_depend.o pg_enum.o \
         pg_inherits.o pg_largeobject.o pg_namespace.o pg_operator.o pg_proc.o \
!        pg_replica.o pg_db_role_setting.o pg_shdepend.o pg_type.o storage.o toasting.o
  
  BKIFILES = postgres.bki postgres.description postgres.shdescription
  
*************** POSTGRES_BKI_SRCS = $(addprefix $(top_sr
*** 34,39 ****
--- 34,40 ----
  	pg_cast.h pg_enum.h pg_namespace.h pg_conversion.h pg_depend.h \
  	pg_database.h pg_db_role_setting.h pg_tablespace.h pg_pltemplate.h \
  	pg_authid.h pg_auth_members.h pg_shdepend.h pg_shdescription.h \
+ 	pg_replica.h pg_replicaitem.h \
  	pg_ts_config.h pg_ts_config_map.h pg_ts_dict.h \
  	pg_ts_parser.h pg_ts_template.h \
  	pg_foreign_data_wrapper.h pg_foreign_server.h pg_user_mapping.h \
diff -dcrpN pgsql/src/backend/catalog/pg_replica.c pgsql-partial/src/backend/catalog/pg_replica.c
*** pgsql/src/backend/catalog/pg_replica.c	1970-01-01 01:00:00.000000000 +0100
--- pgsql-partial/src/backend/catalog/pg_replica.c	2010-08-12 20:14:11.000000000 +0200
***************
*** 0 ****
--- 1,141 ----
+ /*-------------------------------------------------------------------------
+  *
+  * replica.c
+  *	  Common functions for replication classes
+  *
+  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
+  * Portions Copyright (c) 1994, Regents of the University of California
+  *
+  *-------------------------------------------------------------------------
+  */
+ #include "postgres.h"
+ 
+ #include "access/genam.h"
+ #include "access/heapam.h"
+ #include "access/skey.h"
+ #include "access/xact.h"
+ #include "catalog/indexing.h"
+ #include "catalog/pg_replica.h"
+ #include "catalog/pg_replica_fn.h"
+ #include "catalog/pg_replicaitem.h"   
+ #include "catalog/pg_type.h"
+ #include "executor/spi.h"
+ #include "utils/fmgroids.h"
+ #include "utils/rel.h"
+ #include "utils/snapmgr.h"
+ #include "utils/syscache.h"
+ #include "utils/tqual.h"
+ 
+ /*
+  * get_replica_class_oid - given a replication class name, look up the OID
+  *
+  * Returns InvalidOid if replication class name not found.
+  */
+ Oid
+ get_replica_class_oid(const char *classname)
+ {
+ 	Relation	pg_replica;
+ 	ScanKeyData entry[1];
+ 	SysScanDesc scan;
+ 	HeapTuple	rpltuple;
+ 	Oid		oid;
+ 
+ 	pg_replica = heap_open(ReplicaRelationId, AccessShareLock);
+ 	ScanKeyInit(&entry[0],
+ 					Anum_pg_replica_classname,
+ 					BTEqualStrategyNumber, F_NAMEEQ,
+ 					CStringGetDatum(classname));
+ 	scan = systable_beginscan(pg_replica, ReplicaClassnameIndexId, true,
+ 					SnapshotNow, 1, entry);
+ 	rpltuple = systable_getnext(scan);
+ 	/* We assume that there can be at most one matching tuple */
+ 	if (HeapTupleIsValid(rpltuple))
+ 		oid = HeapTupleGetOid(rpltuple);
+ 	else
+ 		oid = InvalidOid;
+ 
+ 	systable_endscan(scan);
+ 	heap_close(pg_replica, AccessShareLock);
+ 
+ 	elog(LOG, "get_replica_class_oid was called. class name '%s' oid '%d'", classname, oid);
+ 
+ 	return oid;
+ }
+ 
+ bool
+ replica_item_exists(Oid classoid, Oid dboid, Oid reloid)
+ {
+ 	bool	result;
+ 
+ 	StartTransactionCommand();
+ 	(void) GetTransactionSnapshot();
+ 
+ 	result = SearchSysCacheExists(REPLICAITEMTRIPLET,
+ 					ObjectIdGetDatum(classoid),
+ 					ObjectIdGetDatum(dboid),
+ 					ObjectIdGetDatum(reloid),
+ 					0);
+ 
+ 	CommitTransactionCommand();
+ 
+ 	elog(LOG, "replica_item_exists was called (%d,%d,%d)=%d", classoid, dboid, reloid, result);
+ 
+ 	return result;
+ 
+ #if 0
+ 	Relation	pg_replicaitem;
+ 	bool		result;
+ 
+ 	StartTransactionCommand();
+ 	(void) GetTransactionSnapshot();
+ 
+ 	pg_replicaitem = heap_open(ReplicaItemRelationId, RowShareLock);
+ 	result = replica_item_exists2(pg_replicaitem, classoid, dboid, InvalidOid);
+ 	heap_close(pg_replicaitem, RowShareLock);
+ 
+ 	CommitTransactionCommand();
+ 
+ 	elog(LOG, "replica_item_exists was called (%d,%d,%d)=%d", classoid, dboid, reloid, result);
+ 
+ 	return result;
+ #endif
+ }
+ 
+ bool
+ replica_item_exists2(Relation pg_replicaitem,
+ 				Oid classoid, Oid dboid, Oid reloid)
+ {
+ 	ScanKeyData entry[3];
+ 	SysScanDesc scan;
+ 	HeapTuple	itemtuple;
+ 	bool		result;
+ 
+ 	if (!OidIsValid(classoid))
+ 		return false;
+ 	if (!OidIsValid(dboid))
+ 		return false;
+ 
+ 	ScanKeyInit(&entry[0],
+ 					Anum_pg_replicaitem_classoid,
+ 					BTEqualStrategyNumber, F_OIDEQ,
+ 					ObjectIdGetDatum(classoid));
+ 	ScanKeyInit(&entry[1],
+ 					Anum_pg_replicaitem_dboid,
+ 					BTEqualStrategyNumber, F_OIDEQ,
+ 					ObjectIdGetDatum(dboid));
+ 	ScanKeyInit(&entry[2],
+ 					Anum_pg_replicaitem_reloid,
+ 					BTEqualStrategyNumber, F_OIDEQ,
+ 					ObjectIdGetDatum(reloid));
+ 
+ 	scan = systable_beginscan(pg_replicaitem, ReplicaItemIndexId, true,
+ 					SnapshotNow, 3, entry);
+ 
+ 	itemtuple = systable_getnext(scan);
+ 
+ 	result = HeapTupleIsValid(itemtuple);
+ 
+ 	systable_endscan(scan);
+ 
+ 	return result;
+ }
diff -dcrpN pgsql/src/backend/catalog/storage.c pgsql-partial/src/backend/catalog/storage.c
*** pgsql/src/backend/catalog/storage.c	2010-02-09 22:43:30.000000000 +0100
--- pgsql-partial/src/backend/catalog/storage.c	2010-08-12 19:55:18.000000000 +0200
***************
*** 23,28 ****
--- 23,29 ----
  #include "access/xact.h"
  #include "access/xlogutils.h"
  #include "catalog/catalog.h"
+ #include "catalog/pg_replica_fn.h"
  #include "catalog/storage.h"
  #include "storage/freespace.h"
  #include "storage/smgr.h"
*************** smgr_redo(XLogRecPtr lsn, XLogRecord *re
*** 456,461 ****
--- 457,473 ----
  		xl_smgr_create *xlrec = (xl_smgr_create *) XLogRecGetData(record);
  		SMgrRelation reln;
  
+ 		if (OidIsValid(standby_replica_classoid))
+ 		{
+ 			bool exists;
+ 
+ 			exists = replica_item_exists(standby_replica_classoid,
+ 								xlrec->rnode.dbNode,
+ 								xlrec->rnode.relNode);
+ 			if (exists)
+ 				return;
+ 		}
+ 
  		reln = smgropen(xlrec->rnode);
  		smgrcreate(reln, MAIN_FORKNUM, true);
  	}
*************** smgr_redo(XLogRecPtr lsn, XLogRecord *re
*** 465,470 ****
--- 477,493 ----
  		SMgrRelation reln;
  		Relation	rel;
  
+ 		if (OidIsValid(standby_replica_classoid))
+ 		{
+ 			bool exists;
+ 
+ 			exists = replica_item_exists(standby_replica_classoid,
+ 								xlrec->rnode.dbNode,
+ 								xlrec->rnode.relNode);
+ 			if (exists)
+ 				return;
+ 		}
+ 
  		reln = smgropen(xlrec->rnode);
  
  		/*
diff -dcrpN pgsql/src/backend/commands/dbcommands.c pgsql-partial/src/backend/commands/dbcommands.c
*** pgsql/src/backend/commands/dbcommands.c	2010-08-07 10:40:10.000000000 +0200
--- pgsql-partial/src/backend/commands/dbcommands.c	2010-08-12 17:08:10.000000000 +0200
***************
*** 35,40 ****
--- 35,41 ----
  #include "catalog/pg_authid.h"
  #include "catalog/pg_database.h"
  #include "catalog/pg_db_role_setting.h"
+ #include "catalog/pg_replica_fn.h"
  #include "catalog/pg_tablespace.h"
  #include "commands/comment.h"
  #include "commands/dbcommands.h"
*************** dbase_redo(XLogRecPtr lsn, XLogRecord *r
*** 1925,1930 ****
--- 1926,1944 ----
  		xl_dbase_drop_rec *xlrec = (xl_dbase_drop_rec *) XLogRecGetData(record);
  		char	   *dst_path;
  
+ 		if (OidIsValid(standby_replica_classoid))
+ 		{
+ 			bool	exists;
+ 
+ 			StartTransactionCommand();
+ 			exists = replica_item_exists(standby_replica_classoid,
+ 									xlrec->db_id,
+ 									InvalidOid);
+ 			CommitTransactionCommand();
+ 			if (exists)
+ 				return;
+ 		}
+ 
  		dst_path = GetDatabasePath(xlrec->db_id, xlrec->tablespace_id);
  
  		if (InHotStandby)
diff -dcrpN pgsql/src/backend/commands/Makefile pgsql-partial/src/backend/commands/Makefile
*** pgsql/src/backend/commands/Makefile	2009-07-29 22:56:18.000000000 +0200
--- pgsql-partial/src/backend/commands/Makefile	2010-08-11 07:39:21.000000000 +0200
*************** OBJS = aggregatecmds.o alter.o analyze.o
*** 16,22 ****
  	constraint.o conversioncmds.o copy.o \
  	dbcommands.o define.o discard.o explain.o foreigncmds.o functioncmds.o \
  	indexcmds.o lockcmds.o operatorcmds.o opclasscmds.o \
! 	portalcmds.o prepare.o proclang.o \
  	schemacmds.o sequence.o tablecmds.o tablespace.o trigger.o \
  	tsearchcmds.o typecmds.o user.o vacuum.o vacuumlazy.o \
  	variable.o view.o
--- 16,22 ----
  	constraint.o conversioncmds.o copy.o \
  	dbcommands.o define.o discard.o explain.o foreigncmds.o functioncmds.o \
  	indexcmds.o lockcmds.o operatorcmds.o opclasscmds.o \
! 	portalcmds.o prepare.o proclang.o replica.o \
  	schemacmds.o sequence.o tablecmds.o tablespace.o trigger.o \
  	tsearchcmds.o typecmds.o user.o vacuum.o vacuumlazy.o \
  	variable.o view.o
diff -dcrpN pgsql/src/backend/commands/replica.c pgsql-partial/src/backend/commands/replica.c
*** pgsql/src/backend/commands/replica.c	1970-01-01 01:00:00.000000000 +0100
--- pgsql-partial/src/backend/commands/replica.c	2010-08-11 07:44:52.000000000 +0200
***************
*** 0 ****
--- 1,549 ----
+ /*-------------------------------------------------------------------------
+  *
+  * replica.c
+  *	  Commands to manipulate replication classes
+  *
+  * Replication classes are filters for replication slaves indicating
+  * what NOT to replicate. This is for saving space on slaves where
+  * certain data is not needed. Possible exluded objects are
+  * whole databases and relations (tables, indexes, sequences) inside
+  * databases.
+  *
+  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
+  * Portions Copyright (c) 1994, Regents of the University of California
+  *
+  *-------------------------------------------------------------------------
+  */
+ #include "postgres.h"
+ 
+ #include "access/genam.h"
+ #include "access/heapam.h"
+ #include "access/skey.h"
+ #include "catalog/catalog.h"
+ #include "catalog/dependency.h"
+ #include "catalog/indexing.h"
+ #include "catalog/namespace.h"
+ #include "catalog/pg_database.h"
+ #include "catalog/pg_replica.h"
+ #include "catalog/pg_replica_fn.h"
+ #include "catalog/pg_replicaitem.h"
+ #include "commands/dbcommands.h"
+ #include "commands/replica.h"
+ #include "miscadmin.h"
+ #include "nodes/parsenodes.h"
+ #include "postmaster/bgwriter.h"
+ #include "utils/builtins.h"
+ #include "utils/fmgroids.h"
+ #include "utils/lsyscache.h"
+ #include "utils/rel.h"
+ #include "utils/syscache.h"
+ #include "utils/tqual.h"
+ 
+ typedef struct replica_item {
+ 	Oid		dboid;
+ 	Oid		reloid;
+ 	ReplicaElem	   *elem;
+ 	bool		warned;
+ 	struct replica_item *next;
+ } replica_item;
+ 
+ static Oid
+ get_lastsysoid(Oid dboid)
+ {
+ 	HeapTuple	tuple;
+ 	Oid		result = InvalidOid;;
+ 
+ 	tuple = SearchSysCache1(DATABASEOID, ObjectIdGetDatum(dboid));
+ 
+ 	if (HeapTupleIsValid(tuple))
+ 	{
+ 		Form_pg_database dbform = (Form_pg_database) GETSTRUCT(tuple);
+ 
+ 		result = dbform->datlastsysoid;
+ 	}
+ 
+ 	ReleaseSysCache(tuple);
+ 
+ 	return result;
+ }
+ 
+ static HeapTuple
+ get_replica_item(Relation pg_replicaitem, Oid classoid, Oid dboid, Oid reloid)
+ {
+ 	ScanKeyData entry[3];
+ 	SysScanDesc scan;
+ 	HeapTuple	itemtuple;
+ 
+ 	ScanKeyInit(&entry[0],
+ 					Anum_pg_replicaitem_classoid,
+ 					BTEqualStrategyNumber, F_OIDEQ,
+ 					ObjectIdGetDatum(classoid));
+ 	ScanKeyInit(&entry[1],
+ 					Anum_pg_replicaitem_dboid,
+ 					BTEqualStrategyNumber, F_OIDEQ,
+ 					ObjectIdGetDatum(dboid));
+ 	ScanKeyInit(&entry[2],
+ 					Anum_pg_replicaitem_reloid,
+ 					BTEqualStrategyNumber, F_OIDEQ,
+ 					ObjectIdGetDatum(reloid));
+ 
+ 	scan = systable_beginscan(pg_replicaitem, ReplicaItemIndexId, true,
+ 					SnapshotNow, 3, entry);
+ 
+ 	itemtuple = systable_getnext(scan);
+ 
+ 	systable_endscan(scan);
+ 
+ 	return itemtuple;
+ }
+ 
+ static void
+ add_excluded_objects(Oid classoid, replica_item *objs)
+ {
+ 	Relation	pg_replicaitem_rel;
+ 	Datum		new_item[Natts_pg_replicaitem];
+ 	bool		new_item_nulls[Natts_pg_replicaitem];
+ 	HeapTuple	tuple;
+ 
+ 	pg_replicaitem_rel = heap_open(ReplicaItemRelationId, RowExclusiveLock);
+ 
+ 	while (objs)
+ 	{
+ 		if (replica_item_exists2(pg_replicaitem_rel, classoid, objs->dboid, objs->reloid))
+ 		{
+ 			if (objs->elem->kind == 'd')
+ 			{
+ 				ereport(WARNING,
+ 						(errcode(ERRCODE_DUPLICATE_DATABASE),
+ 						 errmsg("database \"%s\" already excluded in the replication class",
+ 						 objs->elem->dbname)));
+ 			}
+ 			else
+ 			{
+ 				if (objs->elem->range->catalogname)
+ 					ereport(WARNING,
+ 							(errcode(ERRCODE_DUPLICATE_OBJECT),
+ 							 errmsg("relation \"%s.%s.%s\" already excluded in the replication class",
+ 							 objs->elem->range->catalogname, objs->elem->range->schemaname, objs->elem->range->relname)));
+ 				else if (objs->elem->range->schemaname)
+ 					ereport(WARNING,
+ 							(errcode(ERRCODE_DUPLICATE_OBJECT),
+ 							 errmsg("relation \"%s.%s\" already excluded in the replication class",
+ 							 objs->elem->range->schemaname, objs->elem->range->relname)));
+ 				else
+ 					ereport(WARNING,
+ 							(errcode(ERRCODE_DUPLICATE_OBJECT),
+ 							 errmsg("relation \"%s\" already excluded in the replication class",
+ 							 objs->elem->range->relname)));
+ 			}
+ 
+ 			objs = objs->next;
+ 			continue;
+ 		}
+ 
+ 		/* Form tuple */
+ 		MemSet(new_item, 0, sizeof(new_item));
+ 		MemSet(new_item_nulls, false, sizeof(new_item_nulls));
+ 
+ 		new_item[Anum_pg_replicaitem_classoid - 1] = ObjectIdGetDatum(classoid);
+ 		new_item[Anum_pg_replicaitem_dboid - 1] = ObjectIdGetDatum(objs->dboid);
+ 		new_item[Anum_pg_replicaitem_reloid - 1] = ObjectIdGetDatum(objs->reloid);
+ 
+ 		tuple = heap_form_tuple(RelationGetDescr(pg_replicaitem_rel),
+ 								new_item, new_item_nulls);
+ 
+ 		simple_heap_insert(pg_replicaitem_rel, tuple);
+ 
+ 		/* Update indexes */
+ 		CatalogUpdateIndexes(pg_replicaitem_rel, tuple);
+ 
+ 		objs = objs->next;
+ 	}
+ 
+ 	heap_close(pg_replicaitem_rel, NoLock);
+ }
+ 
+ static void
+ del_excluded_objects(Oid classoid, replica_item *objs)
+ {
+ 	Relation	pg_replicaitem_rel;
+ 	HeapTuple	tuple;
+ 
+ 	pg_replicaitem_rel = heap_open(ReplicaItemRelationId, RowExclusiveLock);
+ 
+ 	while (objs)
+ 	{
+ 		tuple = get_replica_item(pg_replicaitem_rel, classoid, objs->dboid, objs->reloid);
+ 		if (!HeapTupleIsValid(tuple))
+ 		{
+ 			if (objs->elem->kind == 'd')
+ 			{
+ 				ereport(WARNING,
+ 						(errcode(ERRCODE_DUPLICATE_DATABASE),
+ 						 errmsg("database \"%s\" not excluded in the replication class",
+ 						 objs->elem->dbname)));
+ 			}
+ 			else
+ 			{
+ 				if (objs->elem->range->catalogname)
+ 					ereport(WARNING,
+ 							(errcode(ERRCODE_DUPLICATE_OBJECT),
+ 							 errmsg("relation \"%s.%s.%s\" not excluded in the replication class",
+ 							 objs->elem->range->catalogname, objs->elem->range->schemaname, objs->elem->range->relname)));
+ 				else if (objs->elem->range->schemaname)
+ 					ereport(WARNING,
+ 							(errcode(ERRCODE_DUPLICATE_OBJECT),
+ 							 errmsg("relation \"%s.%s\" not excluded in the replication class",
+ 							 objs->elem->range->schemaname, objs->elem->range->relname)));
+ 				else
+ 					ereport(WARNING,
+ 							(errcode(ERRCODE_DUPLICATE_OBJECT),
+ 							 errmsg("relation \"%s\" not excluded in the replication class",
+ 							 objs->elem->range->relname)));
+ 			}
+ 
+ 			objs = objs->next;
+ 			continue;
+ 		}
+ 
+ 		simple_heap_delete(pg_replicaitem_rel, &tuple->t_self);
+ 
+ 		objs = objs->next;
+ 	}
+ 
+ 	heap_close(pg_replicaitem_rel, NoLock);
+ }
+ 
+ static void
+ insert_item(replica_item **objs, replica_item *item)
+ {
+ 	replica_item	*cur, *prev = NULL;
+ 
+ 	cur = *objs;
+ 
+ 	while (cur)
+ 	{
+ 		if (item->dboid < cur->dboid)
+ 			break;
+ 		if (item->dboid == cur->dboid && item->reloid <= cur->reloid)
+ 			break;
+ 
+ 		prev = cur;
+ 		cur = cur->next;
+ 	}
+ 
+ 
+ 	if (cur && cur->dboid == item->dboid && cur->reloid == item->reloid)
+ 	{
+ 		if (!cur->warned)
+ 		{
+ 			cur->warned = true;
+ 			if (cur->elem->kind == 'd')
+ 				ereport(WARNING,
+ 						(errcode(ERRCODE_DUPLICATE_DATABASE),
+ 						 errmsg("database \"%s\" specified more than once", cur->elem->dbname)));
+ 			else
+ 			{
+ 				if (cur->elem->range->catalogname)
+ 					ereport(WARNING,
+ 						(errcode(ERRCODE_DUPLICATE_OBJECT),
+ 						 errmsg("relation \"%s.%s.%s\" specified more than once",
+ 						 cur->elem->range->catalogname, cur->elem->range->schemaname, cur->elem->range->relname)));
+ 				else if (cur->elem->range->schemaname)
+ 					ereport(WARNING,
+ 						(errcode(ERRCODE_DUPLICATE_OBJECT),
+ 						 errmsg("relation \"%s.%s\" specified more than once",
+ 						 cur->elem->range->schemaname, cur->elem->range->relname)));
+ 				else
+ 					ereport(WARNING,
+ 						(errcode(ERRCODE_DUPLICATE_OBJECT),
+ 						 errmsg("relation \"%s\" specified more than once",
+ 						 cur->elem->range->relname)));
+ 			}
+ 		}
+ 		return;
+ 	}
+ 
+ 	if (prev)
+ 		prev->next = item;
+ 
+ 	item->next = cur;
+ 
+ 	if (cur == *objs)
+ 		*objs = item;
+ }
+ 
+ static void
+ sort_objects(List *objects, replica_item **add_objs, replica_item **del_objs)
+ {
+ 	ListCell	   *cell;
+ 	char		   *current_db;
+ 	Oid		   *search_path_oids;
+ 	int		n_search_path;
+ 
+ 	if (add_objs)
+ 		*add_objs = NULL;
+ 	if (del_objs)
+ 		*del_objs = NULL;
+ 
+ 	current_db = get_database_name(MyDatabaseId);
+ 
+ 	/*
+ 	 * Try to fetch the search path elements into an array.
+ 	 */
+ 	search_path_oids = (Oid *)palloc(256 * sizeof(Oid));
+ 	n_search_path = fetch_search_path_array(search_path_oids, 256);
+ 	if (n_search_path > 256)
+ 	{
+ 		search_path_oids = repalloc(search_path_oids, n_search_path * sizeof(Oid));
+ 		n_search_path = fetch_search_path_array(search_path_oids, n_search_path);
+ 	}
+ 
+ 	foreach(cell, objects)
+ 	{
+ 		
+ 		ReplicaElem	*elem = (ReplicaElem *)lfirst(cell);
+ 		replica_item	*item = (replica_item *)palloc0(sizeof(replica_item));
+ 
+ 		switch (elem->kind)
+ 		{
+ 			case 'd':
+ 			{
+ 				Oid	dbid = get_database_oid(elem->dbname, true);
+ 				Oid	lastsysoid = get_lastsysoid(dbid);
+ 
+ 				if (!OidIsValid(dbid))
+ 					ereport(ERROR,
+ 							(errcode(ERRCODE_INVALID_DATABASE_DEFINITION),
+ 							 errmsg("database \"%s\" doesn't exist", elem->dbname)));
+ 
+ 				if (dbid < lastsysoid)
+ 					ereport(ERROR,
+ 							(errcode(ERRCODE_INVALID_DATABASE_DEFINITION),
+ 							 errmsg("system database \"%s\" cannot be excluded from replication",
+ 							 elem->dbname)));
+ 
+ 				item->dboid = dbid;
+ 				item->reloid = InvalidOid;
+ 				item->elem = elem;
+ 				break;
+ 			}
+ 			case 'r':
+ 			{
+ 				Oid	nspid;
+ 				Oid	relid = InvalidOid;
+ 				Oid	lastsysoid = get_lastsysoid(MyDatabaseId);
+ 
+ 				if (MyDatabaseId < lastsysoid)
+ 					ereport(ERROR,
+ 							(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
+ 							 errmsg("relation in system database cannot be excluded from replication")));
+ 
+ 				if (elem->range->catalogname && strcmp(elem->range->catalogname, current_db))
+ 					ereport(ERROR,
+ 							(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
+ 							 errmsg("cross-database relation checking for \"%s.%s.%s\" is not possible",
+ 								elem->range->catalogname, elem->range->schemaname, elem->range->relname)));
+ 
+ 				if (elem->range->schemaname)
+ 				{
+ 					nspid = GetSysCacheOid1(NAMESPACENAME, PointerGetDatum(elem->range->schemaname));
+ 					if (!OidIsValid(nspid))
+ 					{
+ 						if (elem->range->catalogname)
+ 							ereport(ERROR,
+ 									(errcode(ERRCODE_INVALID_SCHEMA_DEFINITION),
+ 									 errmsg("invalid schema \"%s\" for relation \"%s.%s.%s\"",
+ 									 elem->range->schemaname,
+ 									 elem->range->catalogname, elem->range->schemaname, elem->range->relname)));
+ 						else
+ 							ereport(ERROR,
+ 									(errcode(ERRCODE_INVALID_SCHEMA_DEFINITION),
+ 									 errmsg("invalid schema \"%s\" for relation \"%s.%s\"",
+ 									 elem->range->schemaname,
+ 									 elem->range->schemaname, elem->range->relname)));
+ 					}
+ 
+ 					relid = get_relname_relid(elem->range->relname, nspid);
+ 					if (!OidIsValid(relid))
+ 					{
+ 						if (elem->range->catalogname)
+ 							ereport(ERROR,
+ 									(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
+ 									 errmsg("invalid relation \"%s.%s.%s\"",
+ 									 elem->range->catalogname, elem->range->schemaname, elem->range->relname)));
+ 						else
+ 							ereport(ERROR,
+ 									(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
+ 									 errmsg("invalid relation \"%s.%s\"",
+ 									 elem->range->schemaname, elem->range->relname)));
+ 					}
+ 				}
+ 				else
+ 				{
+ 					int	i;
+ 					bool	found = false;
+ 
+ 					for (i = 0; i < n_search_path; i++)
+ 					{
+ 						relid = get_relname_relid(elem->range->relname, search_path_oids[i]);
+ 						if (OidIsValid(relid))
+ 						{
+ 							found = true;
+ 							break;
+ 						}
+ 					}
+ 					if (!found)
+ 						ereport(ERROR,
+ 								(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
+ 								 errmsg("invalid relation \"%s",
+ 								 elem->range->relname)));
+ 				}
+ 
+ 				if (relid < lastsysoid)
+ 				{
+ 					if (elem->range->catalogname)
+ 						ereport(ERROR,
+ 								(errcode(ERRCODE_DUPLICATE_OBJECT),
+ 								 errmsg("system relation \"%s.%s.%s\" cannot be excluded from replication",
+ 								 elem->range->catalogname, elem->range->schemaname, elem->range->relname)));
+ 					else if (elem->range->schemaname)
+ 						ereport(ERROR,
+ 								(errcode(ERRCODE_DUPLICATE_OBJECT),
+ 								 errmsg("system relation \"%s.%s\" cannot be excluded from replication",
+ 								 elem->range->schemaname, elem->range->relname)));
+ 					else
+ 						ereport(ERROR,
+ 								(errcode(ERRCODE_DUPLICATE_OBJECT),
+ 								 errmsg("system relation \"%s\" cannot be excluded from replication",
+ 								 elem->range->relname)));
+ 				}
+ 
+ 				item->dboid = MyDatabaseId;
+ 				item->reloid = relid;
+ 				item->elem = elem;
+ 				break;
+ 			}
+ 			default:
+ 				ereport(ERROR,
+ 						(errcode(ERRCODE_INTERNAL_ERROR),
+ 						 errmsg("invalid object kind \"%c\"", elem->kind)));
+ 				break;
+ 		}
+ 
+ 		if (elem->excluded)
+ 		{
+ 			if (!add_objs)
+ 				ereport(ERROR,
+ 						(errcode(ERRCODE_INTERNAL_ERROR),
+ 						 errmsg("objects were specified for exclusion but no pointer to store it")));
+ 
+ 			insert_item(add_objs, item);
+ 		}
+ 		else
+ 		{
+ 			if (!del_objs)
+ 				ereport(ERROR,
+ 						(errcode(ERRCODE_INTERNAL_ERROR),
+ 						 errmsg("objects were specified for re-inclusion but no pointer to store it")));
+ 
+ 			insert_item(del_objs, item);
+ 		}
+ 	}
+ }
+ 
+ void
+ CreateReplicaClass(CreateReplicaStmt *stmt)
+ {
+ 	Relation	pg_replica_rel;
+ 	Oid		classoid;
+ 	Oid		datdba;
+ 	HeapTuple	tuple;
+ 	Datum		new_class[Natts_pg_replica];
+ 	bool		new_class_nulls[Natts_pg_replica];
+ 	replica_item	   *add_objs;
+ 
+ 	if (!superuser())
+ 		ereport(ERROR,
+ 				(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+ 				 errmsg("permission denied to create a replication class")));
+ 
+ 	datdba = GetUserId();
+ 
+ 	sort_objects(stmt->excluded_objects, &add_objs, NULL);
+ 
+ 	/*
+ 	 * Check for replication class name conflict.
+ 	 * This is just to give a more friendly error message than
+ 	 * "unique index violation".  There's a race condition but
+ 	 * we're willing to accept the less friendly message in that case.
+ 	 */
+ 	if (OidIsValid(get_replica_class_oid(stmt->name)))
+ 		ereport(ERROR,
+ 				(errcode(ERRCODE_DUPLICATE_OBJECT),
+ 				 errmsg("replication class \"%s\" already exists", stmt->name)));
+ 
+ 	/*
+ 	 * Select an OID for the new class.
+ 	 */
+ 	pg_replica_rel = heap_open(ReplicaRelationId, RowExclusiveLock);
+ 
+ 	classoid = GetNewOid(pg_replica_rel);
+ 
+ 	/* Form tuple */
+ 	MemSet(new_class, 0, sizeof(new_class));
+ 	MemSet(new_class_nulls, false, sizeof(new_class_nulls));
+ 
+ 	new_class[Anum_pg_replica_classname - 1] =
+ 							DirectFunctionCall1(namein, CStringGetDatum(stmt->name));
+ 
+ 	tuple = heap_form_tuple(RelationGetDescr(pg_replica_rel),
+ 								new_class, new_class_nulls);
+ 
+ 	HeapTupleSetOid(tuple, classoid);
+ 
+ 	simple_heap_insert(pg_replica_rel, tuple);
+ 
+ 	/* Update indexes */
+ 	CatalogUpdateIndexes(pg_replica_rel, tuple);
+ 
+ 	/* Register owner dependency */
+ 	recordDependencyOnOwner(ReplicaRelationId, classoid, datdba);
+ 
+ 	add_excluded_objects(classoid, add_objs);
+ 
+ 	/*
+ 	 * Force a checkpoint.
+ 	 */
+ 	RequestCheckpoint(CHECKPOINT_IMMEDIATE | CHECKPOINT_FORCE | CHECKPOINT_WAIT);
+ 
+ 	heap_close(pg_replica_rel, NoLock);
+ }
+ 
+ void
+ AlterReplicaClass(AlterReplicaStmt *stmt)
+ {
+ 	Oid	classoid;
+ 	Oid	datdba;
+ 	replica_item	   *add_objs;
+ 	replica_item	   *del_objs;
+ 
+ 	if (!superuser())
+ 		ereport(ERROR,
+ 				(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+ 				 errmsg("permission denied to create a replication class")));
+ 
+ 	datdba = GetUserId();
+ 
+ 	classoid = get_replica_class_oid(stmt->name);
+ 	if (!OidIsValid(classoid))
+ 		ereport(ERROR,
+ 				(errcode(ERRCODE_UNDEFINED_OBJECT),
+ 				 errmsg("replication class \"%s\" doesn't exist", stmt->name)));
+ 
+ 	sort_objects(stmt->modified_objects, &add_objs, &del_objs);
+ 
+ 	add_excluded_objects(classoid, add_objs);
+ 
+ 	del_excluded_objects(classoid, del_objs);
+ }
diff -dcrpN pgsql/src/backend/parser/gram.y pgsql-partial/src/backend/parser/gram.y
*** pgsql/src/backend/parser/gram.y	2010-08-07 10:40:11.000000000 +0200
--- pgsql-partial/src/backend/parser/gram.y	2010-08-11 07:40:35.000000000 +0200
*************** static TypeName *TableFuncTypeName(List 
*** 185,196 ****
  		AlterForeignServerStmt AlterGroupStmt
  		AlterObjectSchemaStmt AlterOwnerStmt AlterSeqStmt AlterTableStmt
  		AlterUserStmt AlterUserMappingStmt AlterUserSetStmt
! 		AlterRoleStmt AlterRoleSetStmt
  		AlterDefaultPrivilegesStmt DefACLAction
  		AnalyzeStmt ClosePortalStmt ClusterStmt CommentStmt
  		ConstraintsSetStmt CopyStmt CreateAsStmt CreateCastStmt
  		CreateDomainStmt CreateGroupStmt CreateOpClassStmt
! 		CreateOpFamilyStmt AlterOpFamilyStmt CreatePLangStmt
  		CreateSchemaStmt CreateSeqStmt CreateStmt CreateTableSpaceStmt
  		CreateFdwStmt CreateForeignServerStmt CreateAssertStmt CreateTrigStmt
  		CreateUserStmt CreateUserMappingStmt CreateRoleStmt
--- 185,196 ----
  		AlterForeignServerStmt AlterGroupStmt
  		AlterObjectSchemaStmt AlterOwnerStmt AlterSeqStmt AlterTableStmt
  		AlterUserStmt AlterUserMappingStmt AlterUserSetStmt
! 		AlterRoleStmt AlterRoleSetStmt AlterReplicaStmt
  		AlterDefaultPrivilegesStmt DefACLAction
  		AnalyzeStmt ClosePortalStmt ClusterStmt CommentStmt
  		ConstraintsSetStmt CopyStmt CreateAsStmt CreateCastStmt
  		CreateDomainStmt CreateGroupStmt CreateOpClassStmt
! 		CreateOpFamilyStmt AlterOpFamilyStmt CreatePLangStmt CreateReplicaStmt
  		CreateSchemaStmt CreateSeqStmt CreateStmt CreateTableSpaceStmt
  		CreateFdwStmt CreateForeignServerStmt CreateAssertStmt CreateTrigStmt
  		CreateUserStmt CreateUserMappingStmt CreateRoleStmt
*************** static TypeName *TableFuncTypeName(List 
*** 438,443 ****
--- 438,446 ----
  				opt_frame_clause frame_extent frame_bound
  %type <str>		opt_existing_window_name
  
+ %type <list>	ReplicaExclElem ReplicaInclExclElem
+ %type <list>	ExclDbList ExclRelList InclDbList InclRelList
+ %type <list>	ReplicaExclList ReplicaInclExclList
  
  /*
   * Non-keyword token types.  These are hard-wired into the "flex" lexer.
*************** static TypeName *TableFuncTypeName(List 
*** 519,525 ****
  	QUOTE
  
  	RANGE READ REAL REASSIGN RECHECK RECURSIVE REF REFERENCES REINDEX
! 	RELATIVE_P RELEASE RENAME REPEATABLE REPLACE REPLICA RESET RESTART
  	RESTRICT RETURNING RETURNS REVOKE RIGHT ROLE ROLLBACK ROW ROWS RULE
  
  	SAVEPOINT SCHEMA SCROLL SEARCH SECOND_P SECURITY SELECT SEQUENCE SEQUENCES
--- 522,528 ----
  	QUOTE
  
  	RANGE READ REAL REASSIGN RECHECK RECURSIVE REF REFERENCES REINDEX
! 	RELATIVE_P RELATION RELEASE RENAME REPEATABLE REPLACE REPLICA RESET RESTART
  	RESTRICT RETURNING RETURNS REVOKE RIGHT ROLE ROLLBACK ROW ROWS RULE
  
  	SAVEPOINT SCHEMA SCROLL SEARCH SECOND_P SECURITY SELECT SEQUENCE SEQUENCES
*************** stmt :
*** 657,662 ****
--- 660,666 ----
  			| AlterOwnerStmt
  			| AlterSeqStmt
  			| AlterTableStmt
+ 			| AlterReplicaStmt
  			| AlterRoleSetStmt
  			| AlterRoleStmt
  			| AlterTSConfigurationStmt
*************** stmt :
*** 684,689 ****
--- 688,694 ----
  			| CreateOpFamilyStmt
  			| AlterOpFamilyStmt
  			| CreatePLangStmt
+ 			| CreateReplicaStmt
  			| CreateSchemaStmt
  			| CreateSeqStmt
  			| CreateStmt
*************** copy_generic_opt_arg_list_item:
*** 2197,2202 ****
--- 2202,2335 ----
  /*****************************************************************************
   *
   *		QUERY :
+  *				CREATE REPLICA CLASS classname
+  *
+  *****************************************************************************/
+ 
+ CreateReplicaStmt:
+ 		CREATE REPLICA CLASS name ReplicaExclList
+ 				{
+ 					CreateReplicaStmt *n = makeNode(CreateReplicaStmt);
+ 					n->name = $4;
+ 					n->excluded_objects = $5;
+ 					$$ = (Node *)n;
+ 				}
+ 		;
+ 
+ ReplicaExclList:
+ 		ReplicaExclElem					{ $$ = $1; }
+ 		| ReplicaExclList ',' ReplicaExclElem		{ $$ = list_concat($1, $3); }
+ 		;
+ 
+ ReplicaExclElem:
+ 		EXCLUDING DATABASE '(' ExclDbList ')'		{ $$ = $4; }
+ 		| EXCLUDING RELATION '(' ExclRelList ')'	{ $$ = $4; }
+ 		;
+ 
+ ExclDbList:	database_name
+ 				{
+ 					ReplicaElem *n = makeNode(ReplicaElem);
+ 					n->kind = 'd';
+ 					n->excluded = true;
+ 					n->dbname = $1;
+ 					$$ = list_make1(n);
+ 				}
+ 		| ExclDbList ',' database_name
+ 				{
+ 					ReplicaElem *n = makeNode(ReplicaElem);
+ 					n->kind = 'd';
+ 					n->excluded = true;
+ 					n->dbname = $3;
+ 					$$ = lappend($1, n);
+ 				}
+ 		;
+ 
+ ExclRelList:	qualified_name
+ 				{
+ 					ReplicaElem *n = makeNode(ReplicaElem);
+ 					n->kind = 'r';
+ 					n->excluded = true;
+ 					n->range = $1;
+ 					$$ = list_make1(n);
+ 				}
+ 		| ExclRelList ',' qualified_name
+ 				{
+ 					ReplicaElem *n = makeNode(ReplicaElem);
+ 					n->kind = 'r';
+ 					n->excluded = true;
+ 					n->range = $3;
+ 					$$ = lappend($1, n);
+ 				}
+ 		;
+ 
+ /*****************************************************************************
+  *
+  *		QUERY :
+  *				ALTER REPLICA CLASS classname
+  *
+  *****************************************************************************/
+ 
+ AlterReplicaStmt:
+ 		ALTER REPLICA CLASS name ReplicaInclExclList
+ 				{
+ 					AlterReplicaStmt *n = makeNode(AlterReplicaStmt);
+ 					n->name = $4;
+ 					n->modified_objects = $5;
+ 					$$ = (Node *)n;
+ 				}
+ 		;
+ 
+ ReplicaInclExclList:
+ 		ReplicaInclExclElem				{ $$ = $1; }
+ 		| ReplicaInclExclList ',' ReplicaInclExclElem	{ $$ = list_concat($1, $3); }
+ 		;
+ 
+ ReplicaInclExclElem:
+ 		EXCLUDING DATABASE '(' ExclDbList ')'		{ $$ = $4; }
+ 		| EXCLUDING RELATION '(' ExclRelList ')'	{ $$ = $4; }
+ 		| INCLUDING DATABASE '(' InclDbList ')'		{ $$ = $4; }
+ 		| INCLUDING RELATION '(' InclRelList ')'	{ $$ = $4; }
+ 		;
+ 
+ InclDbList:	database_name
+ 				{
+ 					ReplicaElem *n = makeNode(ReplicaElem);
+ 					n->kind = 'd';
+ 					n->excluded = false;
+ 					n->dbname = $1;
+ 					$$ = list_make1(n);
+ 				}
+ 		| InclDbList ',' database_name
+ 				{
+ 					ReplicaElem *n = makeNode(ReplicaElem);
+ 					n->kind = 'd';
+ 					n->excluded = false;
+ 					n->dbname = $3;
+ 					$$ = lappend($1, n);
+ 				}
+ 		;
+ 
+ InclRelList:	qualified_name
+ 				{
+ 					ReplicaElem *n = makeNode(ReplicaElem);
+ 					n->kind = 'r';
+ 					n->excluded = false;
+ 					n->range = $1;
+ 					$$ = list_make1(n);
+ 				}
+ 		| InclRelList ',' qualified_name
+ 				{
+ 					ReplicaElem *n = makeNode(ReplicaElem);
+ 					n->kind = 'r';
+ 					n->excluded = false;
+ 					n->range = $3;
+ 					$$ = lappend($1, n);
+ 				}
+ 		;
+ 
+ /*****************************************************************************
+  *
+  *		QUERY :
   *				CREATE TABLE relname
   *
   *****************************************************************************/
*************** unreserved_keyword:
*** 11056,11061 ****
--- 11189,11195 ----
  			| REF
  			| REINDEX
  			| RELATIVE_P
+ 			| RELATION
  			| RELEASE
  			| RENAME
  			| REPEATABLE
diff -dcrpN pgsql/src/backend/tcop/utility.c pgsql-partial/src/backend/tcop/utility.c
*** pgsql/src/backend/tcop/utility.c	2010-07-26 10:05:50.000000000 +0200
--- pgsql-partial/src/backend/tcop/utility.c	2010-08-11 07:39:21.000000000 +0200
***************
*** 36,41 ****
--- 36,42 ----
  #include "commands/portalcmds.h"
  #include "commands/prepare.h"
  #include "commands/proclang.h"
+ #include "commands/replica.h"
  #include "commands/schemacmds.h"
  #include "commands/sequence.h"
  #include "commands/tablecmds.h"
*************** check_xact_readonly(Node *parsetree)
*** 218,223 ****
--- 219,226 ----
  		case T_AlterUserMappingStmt:
  		case T_DropUserMappingStmt:
  		case T_AlterTableSpaceOptionsStmt:
+ 		case T_CreateReplicaStmt:
+ 		case T_AlterReplicaStmt:
  			PreventCommandIfReadOnly(CreateCommandTag(parsetree));
  			break;
  		default:
*************** standard_ProcessUtility(Node *parsetree,
*** 568,573 ****
--- 571,583 ----
  			AlterTableSpaceOptions((AlterTableSpaceOptionsStmt *) parsetree);
  			break;
  
+ 		case T_CreateReplicaStmt:
+ 			CreateReplicaClass((CreateReplicaStmt *) parsetree);
+ 			break;
+ 		case T_AlterReplicaStmt:
+ 			AlterReplicaClass((AlterReplicaStmt *) parsetree);
+ 			break;
+ 
  		case T_CreateFdwStmt:
  			CreateForeignDataWrapper((CreateFdwStmt *) parsetree);
  			break;
*************** CreateCommandTag(Node *parsetree)
*** 1503,1508 ****
--- 1513,1525 ----
  			tag = "ALTER TABLESPACE";
  			break;
  
+ 		case T_CreateReplicaStmt:
+ 			tag = "CREATE REPLICA CLASS";
+ 			break;
+ 		case T_AlterReplicaStmt:
+ 			tag = "ALTER REPLICA CLASS";
+ 			break;
+ 
  		case T_CreateFdwStmt:
  			tag = "CREATE FOREIGN DATA WRAPPER";
  			break;
diff -dcrpN pgsql/src/backend/utils/cache/relmapper.c pgsql-partial/src/backend/utils/cache/relmapper.c
*** pgsql/src/backend/utils/cache/relmapper.c	2010-02-26 03:01:12.000000000 +0100
--- pgsql-partial/src/backend/utils/cache/relmapper.c	2010-08-12 21:55:45.000000000 +0200
*************** RelationMapOidToFilenode(Oid relationId,
*** 182,187 ****
--- 182,236 ----
  }
  
  /*
+  * RelationMapFilenodeToOid
+  *
+  * Given a relation filenode, look up its OID. Reverse of RelationMapOidToFilenode
+  *
+  * Returns InvalidOid if the OID is not known (which should never happen,
+  * but the caller is in a better position to report a meaningful error).
+  */
+ Oid
+ RelationMapFilenodeToOid(Oid filenode, bool shared)
+ {
+ 	const RelMapFile *map;
+ 	int32		i;
+ 
+ 	/* If there are active updates, believe those over the main maps */
+ 	if (shared)
+ 	{
+ 		map = &active_shared_updates;
+ 		for (i = 0; i < map->num_mappings; i++)
+ 		{
+ 			if (filenode == map->mappings[i].mapfilenode)
+ 				return map->mappings[i].mapoid
+ 		}
+ 		map = &shared_map;
+ 		for (i = 0; i < map->num_mappings; i++)
+ 		{
+ 			if (filenode == map->mappings[i].mapfilenode)
+ 				return map->mappings[i].mapoid
+ 		}
+ 	}
+ 	else
+ 	{
+ 		map = &active_local_updates;
+ 		for (i = 0; i < map->num_mappings; i++)
+ 		{
+ 			if (filenode == map->mappings[i].mapfilenode)
+ 				return map->mappings[i].mapoid
+ 		}
+ 		map = &local_map;
+ 		for (i = 0; i < map->num_mappings; i++)
+ 		{
+ 			if (filenode == map->mappings[i].mapfilenode)
+ 				return map->mappings[i].mapoid
+ 		}
+ 	}
+ 
+ 	return InvalidOid;
+ }
+ 
+ /*
   * RelationMapUpdateMap
   *
   * Install a new relfilenode mapping for the specified relation.
diff -dcrpN pgsql/src/backend/utils/cache/syscache.c pgsql-partial/src/backend/utils/cache/syscache.c
*** pgsql/src/backend/utils/cache/syscache.c	2010-08-07 10:40:12.000000000 +0200
--- pgsql-partial/src/backend/utils/cache/syscache.c	2010-08-11 07:39:21.000000000 +0200
***************
*** 41,46 ****
--- 41,48 ----
  #include "catalog/pg_operator.h"
  #include "catalog/pg_opfamily.h"
  #include "catalog/pg_proc.h"
+ #include "catalog/pg_replica.h"
+ #include "catalog/pg_replicaitem.h"
  #include "catalog/pg_rewrite.h"
  #include "catalog/pg_statistic.h"
  #include "catalog/pg_tablespace.h"
*************** static const struct cachedesc cacheinfo[
*** 541,546 ****
--- 543,570 ----
  		},
  		1024
  	},
+ 	{ReplicaItemRelationId,		/* REPLICAITEMTRIPLET */
+ 		ReplicaItemIndexId,
+ 		3,
+ 		{
+ 			Anum_pg_replicaitem_classoid,
+ 			Anum_pg_replicaitem_dboid,
+ 			Anum_pg_replicaitem_reloid,
+ 			0
+ 		},
+ 		1024
+ 	},
+ 	{ReplicaRelationId,		/* REPLICANAME */
+ 		ReplicaClassnameIndexId,
+ 		1,
+ 		{
+ 			Anum_pg_replica_classname,
+ 			0,
+ 			0,
+ 			0
+ 		},
+ 		32
+ 	},
  	{RewriteRelationId,			/* RULERELNAME */
  		RewriteRelRulenameIndexId,
  		2,
diff -dcrpN pgsql/src/backend/utils/init/postinit.c pgsql-partial/src/backend/utils/init/postinit.c
*** pgsql/src/backend/utils/init/postinit.c	2010-07-11 11:14:55.000000000 +0200
--- pgsql-partial/src/backend/utils/init/postinit.c	2010-08-12 15:12:06.000000000 +0200
*************** InitPostgres(const char *in_dbname, Oid 
*** 896,901 ****
--- 896,1162 ----
  		CommitTransactionCommand();
  }
  
+ /* --------------------------------
+  * InitPostgresForPartialReplication
+  *
+  * Dumbed down version of InitPostgres for a fixed database.
+  */
+ void
+ InitPostgresForPartialReplication(void)
+ {
+ 	bool		am_superuser;
+ 	GucContext	gucctx;
+ 	char	   *fullpath;
+ 	const char *dbname = "replication";
+ 	Form_pg_database dbform;
+ 	HeapTuple	tuple;
+ 
+ 	elog(DEBUG3, "InitPostgresForPartialReplication");
+ 
+ 	/*
+ 	 * Initialize my entry in the shared-invalidation manager's array of
+ 	 * per-backend data.
+ 	 *
+ 	 * Sets up MyBackendId, a unique backend identifier.
+ 	 */
+ 	MyBackendId = InvalidBackendId;
+ 
+ 	SharedInvalBackendInit(false);
+ 
+ 	if (MyBackendId > MaxBackends || MyBackendId <= 0)
+ 		elog(FATAL, "bad backend id: %d", MyBackendId);
+ 
+ 	/* Now that we have a BackendId, we can participate in ProcSignal */
+ 	ProcSignalInit(MyBackendId);
+ 
+ 	/*
+ 	 * bufmgr needs another initialization call too
+ 	 */
+ 	InitBufferPoolBackend();
+ 
+ 	/*
+ 	 * Initialize the relation cache and the system catalog caches.  Note that
+ 	 * no catalog access happens here; we only set up the hashtable structure.
+ 	 * We must do this before starting a transaction because transaction abort
+ 	 * would try to touch these hashtables.
+ 	 */
+ 	RelationCacheInitialize();
+ 	InitCatalogCache();
+ 	InitPlanCache();
+ 
+ 	/* Initialize portal manager */
+ 	EnablePortalManager();
+ 
+ 	/* Initialize stats collection --- must happen before first xact */
+ 	pgstat_initialize();
+ 
+ 	/*
+ 	 * Load relcache entries for the shared system catalogs.  This must create
+ 	 * at least entries for pg_database and catalogs used for authentication.
+ 	 */
+ 	RelationCacheInitializePhase2();
+ 
+ 	/*
+ 	 * Set up process-exit callback to do pre-shutdown cleanup.  This has to
+ 	 * be after we've initialized all the low-level modules like the buffer
+ 	 * manager, because during shutdown this has to run before the low-level
+ 	 * modules start to close down.  On the other hand, we want it in place
+ 	 * before we begin our first transaction --- if we fail during the
+ 	 * initialization transaction, as is entirely possible, we need the
+ 	 * AbortTransaction call to clean up.
+ 	 */
+ 	on_shmem_exit(ShutdownPostgres, 0);
+ 
+ 	/*
+ 	 * Start a new transaction here before first access to db, and get a
+ 	 * snapshot.  We don't have a use for the snapshot itself, but we're
+ 	 * interested in the secondary effect that it sets RecentGlobalXmin. (This
+ 	 * is critical for anything that reads heap pages, because HOT may decide
+ 	 * to prune them even if the process doesn't attempt to modify any
+ 	 * tuples.)
+ 	 */
+ 	StartTransactionCommand();
+ 	(void) GetTransactionSnapshot();
+ 
+ 	InitializeSessionUserIdStandalone();
+ 	am_superuser = true;
+ 
+ 	tuple = GetDatabaseTuple(dbname);
+ 	if (!HeapTupleIsValid(tuple))
+ 		ereport(FATAL,
+ 					(errcode(ERRCODE_UNDEFINED_DATABASE),
+ 					 errmsg("database \"%s\" does not exist", dbname)));
+ 	dbform = (Form_pg_database) GETSTRUCT(tuple);
+ 	MyDatabaseId = HeapTupleGetOid(tuple);
+ 	MyDatabaseTableSpace = dbform->dattablespace;
+ 
+ 	/* Now we can mark our PGPROC entry with the database ID */
+ 	/* (We assume this is an atomic store so no lock is needed) */
+ 	MyProc->databaseId = MyDatabaseId;
+ 
+ 	/*
+ 	 * Now, take a writer's lock on the database we are trying to connect to.
+ 	 * If there is a concurrently running DROP DATABASE on that database, this
+ 	 * will block us until it finishes (and has committed its update of
+ 	 * pg_database).
+ 	 *
+ 	 * Note that the lock is not held long, only until the end of this startup
+ 	 * transaction.  This is OK since we are already advertising our use of
+ 	 * the database in the PGPROC array; anyone trying a DROP DATABASE after
+ 	 * this point will see us there.
+ 	 *
+ 	 * Note: use of RowExclusiveLock here is reasonable because we envision
+ 	 * our session as being a concurrent writer of the database.  If we had a
+ 	 * way of declaring a session as being guaranteed-read-only, we could use
+ 	 * AccessShareLock for such sessions and thereby not conflict against
+ 	 * CREATE DATABASE.
+ 	 */
+ 	LockSharedObject(DatabaseRelationId, MyDatabaseId, 0,
+ 						 RowExclusiveLock);
+ 
+ 	/*
+ 	 * Recheck pg_database to make sure the target database hasn't gone away.
+ 	 * If there was a concurrent DROP DATABASE, this ensures we will die
+ 	 * cleanly without creating a mess.
+ 	 */
+ 	tuple = GetDatabaseTuple(dbname);
+ 	if (!HeapTupleIsValid(tuple) ||
+ 		MyDatabaseId != HeapTupleGetOid(tuple) ||
+ 		MyDatabaseTableSpace != ((Form_pg_database) GETSTRUCT(tuple))->dattablespace)
+ 		ereport(FATAL,
+ 					(errcode(ERRCODE_UNDEFINED_DATABASE),
+ 					 errmsg("database \"%s\" does not exist", dbname),
+ 			   errdetail("It seems to have just been dropped or renamed.")));
+ 
+ 	/*
+ 	 * Now we should be able to access the database directory safely. Verify
+ 	 * it's there and looks reasonable.
+ 	 */
+ 	fullpath = GetDatabasePath(MyDatabaseId, MyDatabaseTableSpace);
+ 
+ 	if (access(fullpath, F_OK) == -1)
+ 	{
+ 		if (errno == ENOENT)
+ 			ereport(FATAL,
+ 						(errcode(ERRCODE_UNDEFINED_DATABASE),
+ 						 errmsg("database \"%s\" does not exist",
+ 								dbname),
+ 					errdetail("The database subdirectory \"%s\" is missing.",
+ 							  fullpath)));
+ 		else
+ 			ereport(FATAL,
+ 						(errcode_for_file_access(),
+ 						 errmsg("could not access directory \"%s\": %m",
+ 								fullpath)));
+ 	}
+ 
+ 	ValidatePgVersion(fullpath);
+ 
+ 	SetDatabasePath(fullpath);
+ 
+ 	/*
+ 	 * It's now possible to do real access to the system catalogs.
+ 	 *
+ 	 * Load relcache entries for the system catalogs.  This must create at
+ 	 * least the minimum set of "nailed-in" cache entries.
+ 	 */
+ 	RelationCacheInitializePhase3();
+ 
+ 	/* set up ACL framework (so CheckMyDatabase can check permissions) */
+ 	initialize_acl();
+ 
+ 	/*
+ 	 * Re-read the pg_database row for our database, check permissions and set
+ 	 * up database-specific GUC settings.  We can't do this until all the
+ 	 * database-access infrastructure is up.  (Also, it wants to know if the
+ 	 * user is a superuser, so the above stuff has to happen first.)
+ 	 */
+ 	CheckMyDatabase(dbname, am_superuser);
+ 
+ 	/*
+ 	 * Now process any command-line switches that were included in the startup
+ 	 * packet, if we are in a regular backend.	We couldn't do this before
+ 	 * because we didn't know if client is a superuser.
+ 	 */
+ 	gucctx = am_superuser ? PGC_SUSET : PGC_BACKEND;
+ 
+ 	if (MyProcPort != NULL &&
+ 		MyProcPort->cmdline_options != NULL)
+ 	{
+ 		/*
+ 		 * The maximum possible number of commandline arguments that could
+ 		 * come from MyProcPort->cmdline_options is (strlen + 1) / 2; see
+ 		 * pg_split_opts().
+ 		 */
+ 		char	  **av;
+ 		int			maxac;
+ 		int			ac;
+ 
+ 		maxac = 2 + (strlen(MyProcPort->cmdline_options) + 1) / 2;
+ 
+ 		av = (char **) palloc(maxac * sizeof(char *));
+ 		ac = 0;
+ 
+ 		av[ac++] = "postgres";
+ 
+ 		/* Note this mangles MyProcPort->cmdline_options */
+ 		pg_split_opts(av, &ac, MyProcPort->cmdline_options);
+ 
+ 		av[ac] = NULL;
+ 
+ 		Assert(ac < maxac);
+ 
+ 		(void) process_postgres_switches(ac, av, gucctx);
+ 	}
+ 
+ 	/*
+ 	 * Process any additional GUC variable settings passed in startup packet.
+ 	 * These are handled exactly like command-line variables.
+ 	 */
+ 	if (MyProcPort != NULL)
+ 	{
+ 		ListCell   *gucopts = list_head(MyProcPort->guc_options);
+ 
+ 		while (gucopts)
+ 		{
+ 			char	   *name;
+ 			char	   *value;
+ 
+ 			name = lfirst(gucopts);
+ 			gucopts = lnext(gucopts);
+ 
+ 			value = lfirst(gucopts);
+ 			gucopts = lnext(gucopts);
+ 
+ 			SetConfigOption(name, value, gucctx, PGC_S_CLIENT);
+ 		}
+ 	}
+ 
+ 	/* Process pg_db_role_setting options */
+ 	process_settings(MyDatabaseId, GetSessionUserId());
+ 
+ 	/* Apply PostAuthDelay as soon as we've read all options */
+ 	if (PostAuthDelay > 0)
+ 		pg_usleep(PostAuthDelay * 1000000L);
+ 
+ 	/*
+ 	 * Initialize various default states that can't be set up until we've
+ 	 * selected the active user and gotten the right GUC settings.
+ 	 */
+ 
+ 	/* set default namespace search path */
+ 	InitializeSearchPath();
+ 
+ 	/* initialize client encoding */
+ 	InitializeClientEncoding();
+ 
+ 	/* report this backend in the PgBackendStatus array */
+ 	pgstat_bestart();
+ 
+ 	/* close the transaction we started above */
+ 	CommitTransactionCommand();
+ }
+ 
  /*
   * Load GUC settings from pg_db_role_setting.
   *
diff -dcrpN pgsql/src/bin/initdb/initdb.c pgsql-partial/src/bin/initdb/initdb.c
*** pgsql/src/bin/initdb/initdb.c	2010-02-26 03:01:15.000000000 +0100
--- pgsql-partial/src/bin/initdb/initdb.c	2010-08-12 15:12:59.000000000 +0200
*************** static void load_plpgsql(void);
*** 179,184 ****
--- 179,185 ----
  static void vacuum_db(void);
  static void make_template0(void);
  static void make_postgres(void);
+ static void make_replication(void);
  static void trapsig(int signum);
  static void check_ok(void);
  static char *escape_quotes(const char *src);
*************** make_postgres(void)
*** 1993,1998 ****
--- 1994,2030 ----
  	check_ok();
  }
  
+ /*
+  * copy template1 to replication
+  */
+ static void
+ make_replication(void)
+ {
+ 	PG_CMD_DECL;
+ 	const char **line;
+ 	static const char *template0_setup[] = {
+ 		"CREATE DATABASE replication;\n",
+ 		NULL
+ 	};
+ 
+ 	fputs(_("copying template1 to replication ... "), stdout);
+ 	fflush(stdout);
+ 
+ 	snprintf(cmd, sizeof(cmd),
+ 			 "\"%s\" %s template1 >%s",
+ 			 backend_exec, backend_options,
+ 			 DEVNULL);
+ 
+ 	PG_CMD_OPEN;
+ 
+ 	for (line = template0_setup; *line; line++)
+ 		PG_CMD_PUTS(*line);
+ 
+ 	PG_CMD_CLOSE;
+ 
+ 	check_ok();
+ }
+ 
  
  /*
   * signal handler in case we are interrupted.
*************** main(int argc, char *argv[])
*** 3125,3130 ****
--- 3157,3164 ----
  
  	make_postgres();
  
+ 	make_replication();
+ 
  	if (authwarning != NULL)
  		fprintf(stderr, "%s", authwarning);
  
diff -dcrpN pgsql/src/include/access/xlog.h pgsql-partial/src/include/access/xlog.h
*** pgsql/src/include/access/xlog.h	2010-08-11 07:19:26.000000000 +0200
--- pgsql-partial/src/include/access/xlog.h	2010-08-11 07:39:21.000000000 +0200
*************** extern PGDLLIMPORT TimeLineID ThisTimeLi
*** 145,150 ****
--- 145,158 ----
  extern bool InRecovery;
  
  /*
+  * The standby replays the replication class indicated below
+  * by the name. The OID is determined by and valid only in the
+  * startup process.
+  */
+ extern char	   *standby_replica_classname;
+ extern Oid 		standby_replica_classoid;
+ 
+ /*
   * Like InRecovery, standbyState is only valid in the startup process.
   * In all other processes it will have the value STANDBY_DISABLED (so
   * InHotStandby will read as FALSE).
diff -dcrpN pgsql/src/include/catalog/indexing.h pgsql-partial/src/include/catalog/indexing.h
*** pgsql/src/include/catalog/indexing.h	2010-02-26 03:01:21.000000000 +0100
--- pgsql-partial/src/include/catalog/indexing.h	2010-08-11 07:39:21.000000000 +0200
*************** DECLARE_UNIQUE_INDEX(pg_default_acl_oid_
*** 281,286 ****
--- 281,295 ----
  DECLARE_UNIQUE_INDEX(pg_db_role_setting_databaseid_rol_index, 2965, on pg_db_role_setting using btree(setdatabase oid_ops, setrole oid_ops));
  #define DbRoleSettingDatidRolidIndexId	2965
  
+ DECLARE_UNIQUE_INDEX(pg_replica_oid_index, 3597, on pg_replica using btree (oid oid_ops));
+ #define	ReplicaOidIndexId	3597
+ 
+ DECLARE_UNIQUE_INDEX(pg_replica_classname_index, 3598, on pg_replica using btree(rpl_classname name_ops));
+ #define ReplicaClassnameIndexId	3598
+ 
+ DECLARE_UNIQUE_INDEX(pg_replicaitem_index, 3599, on pg_replicaitem using btree(rpl_classoid oid_ops, rpl_dboid oid_ops, rpl_reloid oid_ops));
+ #define ReplicaItemIndexId	3599
+ 
  /* last step of initialization script: build the indexes declared above */
  BUILD_INDICES
  
diff -dcrpN pgsql/src/include/catalog/pg_replica_fn.h pgsql-partial/src/include/catalog/pg_replica_fn.h
*** pgsql/src/include/catalog/pg_replica_fn.h	1970-01-01 01:00:00.000000000 +0100
--- pgsql-partial/src/include/catalog/pg_replica_fn.h	2010-08-12 19:57:20.000000000 +0200
***************
*** 0 ****
--- 1,25 ----
+ /*-------------------------------------------------------------------------
+  *
+  * pg_replica_fn.h
+  *	support functions for the system replica class
+  *
+  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
+  * Portions Copyright (c) 1994, Regents of the University of California
+  *
+  * $PostgreSQL: $
+  *
+  * NOTES
+  *	the genbki.pl script reads this file and generates .bki
+  *	information from the DATA() statements.
+  *
+  *-------------------------------------------------------------------------
+  */
+ #ifndef PG_REPLICA_FN_H
+ #define PG_REPLICA_FN_H
+ 
+ extern Oid	get_replica_class_oid(const char *classname);
+ extern bool	replica_item_exists(Oid classoid, Oid dboid, Oid reloid);
+ extern bool	replica_item_exists2(Relation pg_replicaitem_rel,
+ 				    Oid classoid, Oid dboid, Oid reloid);
+ 
+ #endif   /* PG_REPLICA_FN_H */
diff -dcrpN pgsql/src/include/catalog/pg_replica.h pgsql-partial/src/include/catalog/pg_replica.h
*** pgsql/src/include/catalog/pg_replica.h	1970-01-01 01:00:00.000000000 +0100
--- pgsql-partial/src/include/catalog/pg_replica.h	2010-08-12 20:10:48.000000000 +0200
***************
*** 0 ****
--- 1,51 ----
+ /*-------------------------------------------------------------------------
+  *
+  * pg_replica.h
+  *	definition of the system "replica class" relation (pg_replica)
+  *	along with the relation's initial contents.
+  *
+  *
+  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
+  * Portions Copyright (c) 1994, Regents of the University of California
+  *
+  * $PostgreSQL: $
+  *
+  * NOTES
+  *	the genbki.pl script reads this file and generates .bki
+  *	information from the DATA() statements.
+  *
+  *-------------------------------------------------------------------------
+  */
+ #ifndef PG_REPLICA_H
+ #define PG_REPLICA_H
+ 
+ #include "catalog/genbki.h"
+ 
+ /* ----------------
+  *		pg_replica_class definition.  cpp turns this into
+  *		typedef struct FormData_pg_replica_class
+  * ----------------
+  */
+ #define ReplicaRelationId		3051
+ 
+ CATALOG(pg_replica,3051) BKI_SHARED_RELATION BKI_ROWTYPE_OID(3052) BKI_SCHEMA_MACRO
+ {
+ 	NameData	rpl_classname;		/* replica class name */
+ } FormData_pg_replica;
+ 
+ /* ----------------
+  *		Form_pg_class corresponds to a pointer to a tuple with
+  *		the format of pg_class relation.
+  * ----------------
+  */
+ typedef FormData_pg_replica *Form_pg_replica;
+ 
+ /* ----------------
+  *		compiler constants for pg_replica
+  * ----------------
+  */
+    
+ #define Natts_pg_replica				1
+ #define Anum_pg_replica_classname			1
+ 
+ #endif   /* PG_REPLICA_H */
diff -dcrpN pgsql/src/include/catalog/pg_replicaitem.h pgsql-partial/src/include/catalog/pg_replicaitem.h
*** pgsql/src/include/catalog/pg_replicaitem.h	1970-01-01 01:00:00.000000000 +0100
--- pgsql-partial/src/include/catalog/pg_replicaitem.h	2010-08-12 20:10:55.000000000 +0200
***************
*** 0 ****
--- 1,55 ----
+ /*-------------------------------------------------------------------------
+  *
+  * pg_replicaitem.h
+  *	definition of the system "replica item" relation (pg_replicaitem)
+  *	along with the relation's initial contents.
+  *
+  *
+  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
+  * Portions Copyright (c) 1994, Regents of the University of California
+  *
+  * $PostgreSQL: $
+  *
+  * NOTES
+  *	the genbki.pl script reads this file and generates .bki
+  *	information from the DATA() statements.
+  *
+  *-------------------------------------------------------------------------
+  */
+ #ifndef PG_REPLICAITEM_H
+ #define PG_REPLICAITEM_H
+ 
+ #include "catalog/genbki.h"
+ 
+ /* ----------------
+  *		pg_replica_class definition.  cpp turns this into
+  *		typedef struct FormData_pg_replica_class
+  * ----------------
+  */
+ #define ReplicaItemRelationId		3053
+ 
+ CATALOG(pg_replicaitem,3053) BKI_SHARED_RELATION BKI_ROWTYPE_OID(3054) BKI_SCHEMA_MACRO BKI_WITHOUT_OIDS
+ {
+ 	Oid	rpl_classoid;		/* replica class oid */
+ 	Oid	rpl_dboid;		/* database oid */
+ 	Oid	rpl_reloid;		/* relation oid */
+ } FormData_pg_replicaitem;
+ 
+ /* ----------------
+  *		Form_pg_class corresponds to a pointer to a tuple with
+  *		the format of pg_class relation.
+  * ----------------
+  */
+ typedef FormData_pg_replicaitem *Form_pg_replicaitem;
+ 
+ /* ----------------
+  *		compiler constants for pg_replicaitem
+  * ----------------
+  */
+    
+ #define Natts_pg_replicaitem					3
+ #define Anum_pg_replicaitem_classoid			1
+ #define Anum_pg_replicaitem_dboid			2
+ #define Anum_pg_replicaitem_reloid			3
+ 
+ #endif   /* PG_REPLICAITEM_H */
diff -dcrpN pgsql/src/include/commands/replica.h pgsql-partial/src/include/commands/replica.h
*** pgsql/src/include/commands/replica.h	1970-01-01 01:00:00.000000000 +0100
--- pgsql-partial/src/include/commands/replica.h	2010-08-11 07:39:21.000000000 +0200
***************
*** 0 ****
--- 1,21 ----
+ /*-------------------------------------------------------------------------
+  *
+  * replica.h
+  *		Partial Replication Class management commands (create/alter replica class).
+  *
+  *
+  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
+  * Portions Copyright (c) 1994, Regents of the University of California
+  *
+  *
+  *-------------------------------------------------------------------------
+  */
+ #ifndef REPLICA_H
+ #define REPLICA_H
+ 
+ #include "nodes/parsenodes.h"
+ 
+ extern void CreateReplicaClass(CreateReplicaStmt *stmt);
+ extern void AlterReplicaClass(AlterReplicaStmt *stmt);
+ 
+ #endif   /* TABLESPACE_H */
diff -dcrpN pgsql/src/include/miscadmin.h pgsql-partial/src/include/miscadmin.h
*** pgsql/src/include/miscadmin.h	2010-06-20 13:59:16.000000000 +0200
--- pgsql-partial/src/include/miscadmin.h	2010-08-12 14:22:45.000000000 +0200
*************** extern ProcessingMode Mode;
*** 340,345 ****
--- 340,346 ----
  extern void pg_split_opts(char **argv, int *argcp, char *optstr);
  extern void InitPostgres(const char *in_dbname, Oid dboid, const char *username,
  			 char *out_dbname);
+ extern void InitPostgresForPartialReplication(void);
  extern void BaseInit(void);
  
  /* in utils/init/miscinit.c */
diff -dcrpN pgsql/src/include/nodes/nodes.h pgsql-partial/src/include/nodes/nodes.h
*** pgsql/src/include/nodes/nodes.h	2010-07-13 10:51:07.000000000 +0200
--- pgsql-partial/src/include/nodes/nodes.h	2010-08-11 07:39:21.000000000 +0200
*************** typedef enum NodeTag
*** 347,352 ****
--- 347,355 ----
  	T_AlterUserMappingStmt,
  	T_DropUserMappingStmt,
  	T_AlterTableSpaceOptionsStmt,
+ 	T_ReplicaElem,
+ 	T_CreateReplicaStmt,
+ 	T_AlterReplicaStmt,
  
  	/*
  	 * TAGS FOR PARSE TREE NODES (parsenodes.h)
diff -dcrpN pgsql/src/include/nodes/parsenodes.h pgsql-partial/src/include/nodes/parsenodes.h
*** pgsql/src/include/nodes/parsenodes.h	2010-08-07 10:40:13.000000000 +0200
--- pgsql-partial/src/include/nodes/parsenodes.h	2010-08-11 07:39:21.000000000 +0200
*************** typedef struct VariableShowStmt
*** 1356,1361 ****
--- 1356,1389 ----
  } VariableShowStmt;
  
  /* ----------------------
+  *		Create Replica Class Statement
+  * ----------------------
+  */
+ 
+ typedef struct ReplicaElem
+ {
+ 	NodeTag		type;
+ 	char		kind;			/* 'd' for database, 'r' for relation */
+ 	bool		excluded;		/* included/excluded */
+ 	char	   *dbname;			/* database name */
+ 	RangeVar   *range;			/* relation */
+ } ReplicaElem;
+ 
+ typedef struct CreateReplicaStmt
+ {
+ 	NodeTag		type;
+ 	char	   *name;
+ 	List	   *excluded_objects;
+ } CreateReplicaStmt;
+ 
+ typedef struct AlterReplicaStmt
+ {
+ 	NodeTag		type;
+ 	char	   *name;
+ 	List	   *modified_objects;
+ } AlterReplicaStmt;
+ 
+ /* ----------------------
   *		Create Table Statement
   *
   * NOTE: in the raw gram.y output, ColumnDef and Constraint nodes are
diff -dcrpN pgsql/src/include/parser/kwlist.h pgsql-partial/src/include/parser/kwlist.h
*** pgsql/src/include/parser/kwlist.h	2010-08-07 10:40:13.000000000 +0200
--- pgsql-partial/src/include/parser/kwlist.h	2010-08-11 07:39:21.000000000 +0200
*************** PG_KEYWORD("recursive", RECURSIVE, UNRES
*** 305,310 ****
--- 305,311 ----
  PG_KEYWORD("ref", REF, UNRESERVED_KEYWORD)
  PG_KEYWORD("references", REFERENCES, RESERVED_KEYWORD)
  PG_KEYWORD("reindex", REINDEX, UNRESERVED_KEYWORD)
+ PG_KEYWORD("relation", RELATION, UNRESERVED_KEYWORD)
  PG_KEYWORD("relative", RELATIVE_P, UNRESERVED_KEYWORD)
  PG_KEYWORD("release", RELEASE, UNRESERVED_KEYWORD)
  PG_KEYWORD("rename", RENAME, UNRESERVED_KEYWORD)
diff -dcrpN pgsql/src/include/utils/syscache.h pgsql-partial/src/include/utils/syscache.h
*** pgsql/src/include/utils/syscache.h	2010-02-14 19:42:18.000000000 +0100
--- pgsql-partial/src/include/utils/syscache.h	2010-08-11 07:39:21.000000000 +0200
*************** enum SysCacheIdentifier
*** 69,74 ****
--- 69,76 ----
  	PROCOID,
  	RELNAMENSP,
  	RELOID,
+ 	REPLICAITEMTRIPLET,
+ 	REPLICANAME,
  	RULERELNAME,
  	STATRELATTINH,
  	TABLESPACEOID,