A little further progress on schemas: push down RangeVars into

addRangeTableEntry calls.  Remove relname field from RTEs, since
it will no longer be a useful unique identifier of relations;
we want to encourage people to rely on the relation OID instead.
Further work on dumping qual expressions in EXPLAIN, too.

src/backend/nodes/copyfuncs.c

@@ -15,7 +15,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.172 2002/03/21 16:00:39 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.173 2002/03/22 02:56:31 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1476,8 +1476,6 @@ _copyRangeTblEntry(RangeTblEntry *from)
 	RangeTblEntry *newnode = makeNode(RangeTblEntry);
 
 	newnode->rtekind = from->rtekind;
-	if (from->relname)
-		newnode->relname = pstrdup(from->relname);
 	newnode->relid = from->relid;
 	Node_Copy(from, newnode, subquery);
 	newnode->jointype = from->jointype;
@@ -2004,19 +2002,6 @@ _copyCreateStmt(CreateStmt *from)
 	return newnode;
 }
 
-static VersionStmt *
-_copyVersionStmt(VersionStmt *from)
-{
-	VersionStmt *newnode = makeNode(VersionStmt);
-
-	newnode->relname = pstrdup(from->relname);
-	newnode->direction = from->direction;
-	newnode->fromRelname = pstrdup(from->fromRelname);
-	newnode->date = pstrdup(from->date);
-
-	return newnode;
-}
-
 static DefineStmt *
 _copyDefineStmt(DefineStmt *from)
 {
@@ -2847,9 +2832,6 @@ copyObject(void *from)
 		case T_CreateStmt:
 			retval = _copyCreateStmt(from);
 			break;
-		case T_VersionStmt:
-			retval = _copyVersionStmt(from);
-			break;
 		case T_DefineStmt:
 			retval = _copyDefineStmt(from);
 			break;

src/backend/nodes/equalfuncs.c

@@ -20,7 +20,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.120 2002/03/21 16:00:39 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/equalfuncs.c,v 1.121 2002/03/22 02:56:31 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -831,21 +831,6 @@ _equalCreateStmt(CreateStmt *a, CreateStmt *b)
 	return true;
 }
 
-static bool
-_equalVersionStmt(VersionStmt *a, VersionStmt *b)
-{
-	if (!equalstr(a->relname, b->relname))
-		return false;
-	if (a->direction != b->direction)
-		return false;
-	if (!equalstr(a->fromRelname, b->fromRelname))
-		return false;
-	if (!equalstr(a->date, b->date))
-		return false;
-
-	return true;
-}
-
 static bool
 _equalDefineStmt(DefineStmt *a, DefineStmt *b)
 {
@@ -1679,8 +1664,6 @@ _equalRangeTblEntry(RangeTblEntry *a, RangeTblEntry *b)
 {
 	if (a->rtekind != b->rtekind)
 		return false;
-	if (!equalstr(a->relname, b->relname))
-		return false;
 	if (a->relid != b->relid)
 		return false;
 	if (!equal(a->subquery, b->subquery))
@@ -2004,9 +1987,6 @@ equal(void *a, void *b)
 		case T_CreateStmt:
 			retval = _equalCreateStmt(a, b);
 			break;
-		case T_VersionStmt:
-			retval = _equalVersionStmt(a, b);
-			break;
 		case T_DefineStmt:
 			retval = _equalDefineStmt(a, b);
 			break;

src/backend/nodes/makefuncs.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/makefuncs.c,v 1.28 2002/03/21 16:00:40 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/makefuncs.c,v 1.29 2002/03/22 02:56:32 tgl Exp $
  */
 #include "postgres.h"
 
@@ -190,3 +190,22 @@ makeRelabelType(Node *arg, Oid rtype, int32 rtypmod)
 
 	return r;
 }
+
+/*
+ * makeRangeVar -
+ *	  creates a RangeVar node (rather oversimplified case)
+ */
+RangeVar *
+makeRangeVar(char *schemaname, char *relname)
+{
+	RangeVar *r = makeNode(RangeVar);
+
+	r->catalogname = NULL;
+	r->schemaname = schemaname;
+	r->relname = relname;
+	r->inhOpt = INH_DEFAULT;
+	r->istemp = false;
+	r->alias = NULL;
+
+	return r;
+}

src/backend/nodes/outfuncs.c

@@ -5,7 +5,7 @@
  * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- *	$Header: /cvsroot/pgsql/src/backend/nodes/outfuncs.c,v 1.150 2002/03/21 16:00:40 tgl Exp $
+ *	$Header: /cvsroot/pgsql/src/backend/nodes/outfuncs.c,v 1.151 2002/03/22 02:56:32 tgl Exp $
  *
  * NOTES
  *	  Every (plan) node in POSTGRES has an associated "out" routine which
@@ -968,25 +968,38 @@ _outAlias(StringInfo str, Alias *node)
 static void
 _outRangeTblEntry(StringInfo str, RangeTblEntry *node)
 {
-	appendStringInfo(str, " RTE :rtekind %d :relname ",
-					 (int) node->rtekind);
-	_outToken(str, node->relname);
-	appendStringInfo(str, " :relid %u :subquery ",
-					 node->relid);
-	_outNode(str, node->subquery);
-	appendStringInfo(str, " :jointype %d :joincoltypes ",
-					 (int) node->jointype);
-	_outOidList(str, node->joincoltypes);
-	appendStringInfo(str, " :joincoltypmods ");
-	_outIntList(str, node->joincoltypmods);
-	appendStringInfo(str, " :joinleftcols ");
-	_outIntList(str, node->joinleftcols);
-	appendStringInfo(str, " :joinrightcols ");
-	_outIntList(str, node->joinrightcols);
-	appendStringInfo(str, " :alias ");
+	/* put alias + eref first to make dump more legible */
+	appendStringInfo(str, " RTE :alias ");
 	_outNode(str, node->alias);
 	appendStringInfo(str, " :eref ");
 	_outNode(str, node->eref);
+	appendStringInfo(str, " :rtekind %d ",
+					 (int) node->rtekind);
+	switch (node->rtekind)
+	{
+		case RTE_RELATION:
+		case RTE_SPECIAL:
+			appendStringInfo(str, ":relid %u ", node->relid);
+			break;
+		case RTE_SUBQUERY:
+			appendStringInfo(str, ":subquery ");
+			_outNode(str, node->subquery);
+			break;
+		case RTE_JOIN:
+			appendStringInfo(str, ":jointype %d :joincoltypes ",
+							 (int) node->jointype);
+			_outOidList(str, node->joincoltypes);
+			appendStringInfo(str, " :joincoltypmods ");
+			_outIntList(str, node->joincoltypmods);
+			appendStringInfo(str, " :joinleftcols ");
+			_outIntList(str, node->joinleftcols);
+			appendStringInfo(str, " :joinrightcols ");
+			_outIntList(str, node->joinrightcols);
+			break;
+		default:
+			elog(ERROR, "bogus rte kind %d", (int) node->rtekind);
+			break;
+	}
 	appendStringInfo(str, " :inh %s :inFromCl %s :checkForRead %s"
 					 " :checkForWrite %s :checkAsUser %u",
 					 booltostr(node->inh),

src/backend/nodes/print.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/print.c,v 1.52 2002/03/21 16:00:41 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/print.c,v 1.53 2002/03/22 02:56:32 tgl Exp $
  *
  * HISTORY
  *	  AUTHOR			DATE			MAJOR EVENT
@@ -146,17 +146,17 @@ print_rt(List *rtable)
 	List	   *l;
 	int			i = 1;
 
-	printf("resno\trelname(refname)\trelid\tinFromCl\n");
-	printf("-----\t----------------\t-----\t--------\n");
+	printf("resno\trefname  \trelid\tinFromCl\n");
+	printf("-----\t---------\t-----\t--------\n");
 	foreach(l, rtable)
 	{
 		RangeTblEntry *rte = lfirst(l);
 
-		if (rte->relname)
-			printf("%d\t%s (%s)\t%u",
-				   i, rte->relname, rte->eref->aliasname, rte->relid);
+		if (rte->rtekind == RTE_RELATION)
+			printf("%d\t%s\t%u",
+				   i, rte->eref->aliasname, rte->relid);
 		else
-			printf("%d\t[subquery] (%s)\t",
+			printf("%d\t%s\t[subquery]",
 				   i, rte->eref->aliasname);
 		printf("\t%s\t%s\n",
 			   (rte->inh ? "inh" : ""),
@@ -406,19 +406,20 @@ print_plan_recursive(Plan *p, Query *parsetree, int indentLevel, char *label)
 	printf("%s%s :c=%.2f..%.2f :r=%.0f :w=%d ", label, plannode_type(p),
 		   p->startup_cost, p->total_cost,
 		   p->plan_rows, p->plan_width);
-	if (IsA(p, Scan) ||IsA(p, SeqScan))
+	if (IsA(p, Scan) ||
+		IsA(p, SeqScan))
 	{
 		RangeTblEntry *rte;
 
 		rte = rt_fetch(((Scan *) p)->scanrelid, parsetree->rtable);
-		StrNCpy(extraInfo, rte->relname, NAMEDATALEN);
+		StrNCpy(extraInfo, rte->eref->aliasname, NAMEDATALEN);
 	}
 	else if (IsA(p, IndexScan))
 	{
 		RangeTblEntry *rte;
 
 		rte = rt_fetch(((IndexScan *) p)->scan.scanrelid, parsetree->rtable);
-		StrNCpy(extraInfo, rte->relname, NAMEDATALEN);
+		StrNCpy(extraInfo, rte->eref->aliasname, NAMEDATALEN);
 	}
 	else
 		extraInfo[0] = '\0';

src/backend/nodes/readfuncs.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.117 2002/03/21 16:00:42 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.118 2002/03/22 02:56:32 tgl Exp $
  *
  * NOTES
  *	  Most of the read functions for plan nodes are tested. (In fact, they
@@ -1498,43 +1498,53 @@ _readRangeTblEntry(void)
 
 	local_node = makeNode(RangeTblEntry);
 
-	token = pg_strtok(&length); /* eat :rtekind */
-	token = pg_strtok(&length); /* get :rtekind */
-	local_node->rtekind = (RTEKind) atoi(token);
-
-	token = pg_strtok(&length); /* eat :relname */
-	token = pg_strtok(&length); /* get :relname */
-	local_node->relname = nullable_string(token, length);
-
-	token = pg_strtok(&length); /* eat :relid */
-	token = pg_strtok(&length); /* get :relid */
-	local_node->relid = atooid(token);
-
-	token = pg_strtok(&length); /* eat :subquery */
-	local_node->subquery = nodeRead(true);		/* now read it */
-
-	token = pg_strtok(&length); /* eat :jointype */
-	token = pg_strtok(&length); /* get jointype */
-	local_node->jointype = (JoinType) atoi(token);
-
-	token = pg_strtok(&length); /* eat :joincoltypes */
-	local_node->joincoltypes = toOidList(nodeRead(true));
-
-	token = pg_strtok(&length); /* eat :joincoltypmods */
-	local_node->joincoltypmods = toIntList(nodeRead(true));
-
-	token = pg_strtok(&length); /* eat :joinleftcols */
-	local_node->joinleftcols = toIntList(nodeRead(true));
-
-	token = pg_strtok(&length); /* eat :joinrightcols */
-	local_node->joinrightcols = toIntList(nodeRead(true));
-
 	token = pg_strtok(&length); /* eat :alias */
 	local_node->alias = nodeRead(true); /* now read it */
 
 	token = pg_strtok(&length); /* eat :eref */
 	local_node->eref = nodeRead(true);	/* now read it */
 
+	token = pg_strtok(&length); /* eat :rtekind */
+	token = pg_strtok(&length); /* get rtekind */
+	local_node->rtekind = (RTEKind) atoi(token);
+
+	switch (local_node->rtekind)
+	{
+		case RTE_RELATION:
+		case RTE_SPECIAL:
+			token = pg_strtok(&length); /* eat :relid */
+			token = pg_strtok(&length); /* get :relid */
+			local_node->relid = atooid(token);
+			break;
+
+		case RTE_SUBQUERY:
+			token = pg_strtok(&length); /* eat :subquery */
+			local_node->subquery = nodeRead(true);		/* now read it */
+			break;
+
+		case RTE_JOIN:
+			token = pg_strtok(&length); /* eat :jointype */
+			token = pg_strtok(&length); /* get jointype */
+			local_node->jointype = (JoinType) atoi(token);
+
+			token = pg_strtok(&length); /* eat :joincoltypes */
+			local_node->joincoltypes = toOidList(nodeRead(true));
+
+			token = pg_strtok(&length); /* eat :joincoltypmods */
+			local_node->joincoltypmods = toIntList(nodeRead(true));
+
+			token = pg_strtok(&length); /* eat :joinleftcols */
+			local_node->joinleftcols = toIntList(nodeRead(true));
+
+			token = pg_strtok(&length); /* eat :joinrightcols */
+			local_node->joinrightcols = toIntList(nodeRead(true));
+			break;
+
+		default:
+			elog(ERROR, "bogus rte kind %d", (int) local_node->rtekind);
+			break;
+	}
+
 	token = pg_strtok(&length); /* eat :inh */
 	token = pg_strtok(&length); /* get :inh */
 	local_node->inh = strtobool(token);