Cleanup of outnodes.

src/backend/lib/stringinfo.c

@@ -9,7 +9,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/lib/stringinfo.c,v 1.7 1998/01/06 18:52:09 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/lib/stringinfo.c,v 1.8 1998/01/07 15:32:19 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -78,7 +78,7 @@ appendStringInfo(StringInfo str, char *buffer)
 
 	Assert(str != NULL);
 	if (buffer == NULL)
-		buffer = "\"\"";
+		buffer = "<>";
 
 	/*
 	 * do we have enough space to append the new string? (don't forget to

src/backend/nodes/outfuncs.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/outfuncs.c,v 1.19 1998/01/07 05:54:11 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/outfuncs.c,v 1.20 1998/01/07 15:32:25 momjian Exp $
  *
  * NOTES
  *	  Every (plan) node in POSTGRES has an associated "out" routine which
@@ -282,7 +282,7 @@ _outPlanInfo(StringInfo str, Plan *node)
 	sprintf(buf, " :width %d ", node->plan_width);
 	appendStringInfo(str, buf);
 	appendStringInfo(str, " :state ");
-	appendStringInfo(str,  node->state ? "not-NULL" : "\"\"");
+	appendStringInfo(str,  node->state ? "not-NULL" : "<>");
 	appendStringInfo(str, " :qptargetlist ");
 	_outNode(str, node->targetlist);
 	appendStringInfo(str, " :qpqual ");
@@ -727,7 +727,7 @@ _outConst(StringInfo str, Const *node)
 	appendStringInfo(str, " :constvalue ");
 	if (node->constisnull)
 	{
-		appendStringInfo(str, "\"\"");
+		appendStringInfo(str, "<>");
 	}
 	else
 	{
@@ -1538,7 +1538,7 @@ _outNode(StringInfo str, void *obj)
 {
 	if (obj == NULL)
 	{
-		appendStringInfo(str, "\"\"");
+		appendStringInfo(str, "<>");
 		return;
 	}
 

src/backend/nodes/print.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/print.c,v 1.12 1997/12/18 12:53:56 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/print.c,v 1.13 1998/01/07 15:32:29 momjian Exp $
  *
  * HISTORY
  *	  AUTHOR			DATE			MAJOR EVENT
@@ -164,7 +164,7 @@ print_expr(Node *expr, List *rtable)
 {
 	if (expr == NULL)
 	{
-		printf("nil");
+		printf("<>");
 		return;
 	}
 

src/backend/nodes/read.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/read.c,v 1.8 1998/01/07 08:07:58 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/read.c,v 1.9 1998/01/07 15:32:31 momjian Exp $
  *
  * HISTORY
  *	  AUTHOR			DATE			MAJOR EVENT
@@ -94,9 +94,8 @@ nodeTokenType(char *token, int length)
 
 		retval = (*token != '.') ? T_Integer : T_Float;
 	}
-		/* make "" == NULL, not T_String.  Is this a problem? 1998/1/7 bjm */
 	else if (isalpha(*token) || *token == '_' || 
-			 (token[0] == '\"' && token[1] == '\"'))
+			 (token[0] == '<' && token[1] == '>'))
 		retval = ATOM_TOKEN;
 	else if (*token == '(')
 		retval = LEFT_PAREN;
@@ -145,15 +144,18 @@ lsptok(char *string, int *length)
 		return (NULL);
 	*length = 1;
 
-	if (*local_str == '\"')
+	if (*local_str == '"')
 	{
-		for (local_str++; *local_str != '\"'; (*length)++, local_str++)
+		for (local_str++; *local_str != '"'; (*length)++, local_str++)
 			;
-		if (*length == 1)
-			*length = 0;	/* if "", return zero length */
-		else
 		(*length)++;
 		local_str++;
+	}
+			/* NULL */
+	else if (local_str[0] == '<' && local_str[1] == '>' )
+	{
+		*length = 0;
+		local_str += 2;
 	}
 	else if (*local_str == ')' || *local_str == '(' ||
 			 *local_str == '}' || *local_str == '{')
@@ -231,7 +233,7 @@ nodeRead(bool read_car_only)
 		case AT_SYMBOL:
 			break;
 		case ATOM_TOKEN:
-			if (!strncmp(token, "\"\"", 2))
+			if (!strncmp(token, "<>", 2))
 			{
 				this_value = NULL;
 

src/backend/rewrite/rewriteDefine.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteDefine.c,v 1.11 1998/01/07 08:08:08 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteDefine.c,v 1.12 1998/01/07 15:32:37 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -115,7 +115,7 @@ InsertRule(char *rulname,
 		is_instead = "t";
 
 	if (evqual == NULL)
-		evqual = "\"\"";
+		evqual = "<>";
 
 	if (IsDefinedRewriteRule(rulname))
 		elog(ABORT, "Attempt to insert rule '%s' failed: already exists",
@@ -245,7 +245,7 @@ DefineQueryRewrite(RuleStmt *stmt)
 							eslot_string,
 							event_qualP,
 							true,
-							"\"\"");
+							"<>");
 		prs2_addToRelation(ev_relid, ruleId, event_type, event_attno, TRUE,
 						   event_qual, NIL);
 

src/man/explain.l

 .\" This is -*-nroff-*-
 .\" XXX standard disclaimer belongs here....
-.\" $Header: /cvsroot/pgsql/src/man/Attic/explain.l,v 1.5 1997/06/12 23:45:54 thomas Exp $
+.\" $Header: /cvsroot/pgsql/src/man/Attic/explain.l,v 1.6 1998/01/07 15:32:47 momjian Exp $
 .TH EXPLAIN SQL 06/12/97 PostgreSQL PostgreSQL
 .SH NAME
 explain \(em explains statement execution details
@@ -29,16 +29,16 @@ EXPLAIN
 tgl=> explain verbose select sum(a) from test;
 NOTICE:QUERY PLAN:
 
-{AGG :cost 0 :size 0 :width 0 :state nil :qptargetlist
+{AGG :cost 0 :size 0 :width 0 :state "" :qptargetlist
  ({TLE :resdom {RESDOM :resno 1 :restype 700 :reslen 4 :resname "sum"
    :reskey 0 :reskeyop 0 :resjunk 0}
   :expr {AGGREG :aggname "sum" :basetype 700 :aggtype 700 :aggno 0
  :target {VAR :varno 1 :varattno 1 :vartype 700 :varnoold 1 :varoattno 1}}})
- :qpqual nil :lefttree {SEQSCAN :cost 0 :size 0 :width 4 :state nil
+ :qpqual "" :lefttree {SEQSCAN :cost 0 :size 0 :width 4 :state ""
   :qptargetlist ({TLE :resdom {RESDOM :resno 1 :restype 700 :reslen 4
    :resname "null" :reskey 0 :reskeyop 0 :resjunk 0}
   :expr {VAR :varno 1 :varattno 1 :vartype 700 :varnoold 1 :varoattno 1}})
- :qpqual nil :lefttree nil :righttree nil :scanrelid 1} :righttree nil :numagg 1 }
+ :qpqual "" :lefttree "" :righttree "" :scanrelid 1} :righttree "" :numagg 1 }
 
 Aggregate  (cost=0.00 size=0 width=0)
   ->   Seq Scan on test  (cost=0.00 size=0 width=4)