From 16efdb5ec7f28bed9541fc773330e3e2ebe2ed9a Mon Sep 17 00:00:00 2001
From: Neil Conway
Date: Thu, 26 Apr 2007 16:13:15 +0000
Subject: Rename the newly-added commands for discarding session state. RESET
 SESSION, RESET PLANS, and RESET TEMP are now DISCARD ALL, DISCARD PLANS, and
 DISCARD TEMP, respectively. This is to avoid confusion with the pre-existing
 RESET variants: the DISCARD commands are not actually similar to RESET. Patch
 from Marko Kreen, with some minor editorialization.

---
 src/backend/parser/gram.y     | 45 +++++++++++++++++++++++++++++++++++++++----
 src/backend/parser/keywords.c |  4 +++-
 2 files changed, 44 insertions(+), 5 deletions(-)

(limited to 'src/backend/parser')

diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y
index b9728deaada..a69e6989a94 100644
--- a/src/backend/parser/gram.y
+++ b/src/backend/parser/gram.y
@@ -11,7 +11,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.589 2007/04/16 01:14:56 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.590 2007/04/26 16:13:11 neilc Exp $
  *
  * HISTORY
  *	  AUTHOR			DATE			MAJOR EVENT
@@ -158,7 +158,7 @@ static Node *makeXmlExpr(XmlExprOp op, char *name, List *named_args, List *args)
 		CreateOpFamilyStmt AlterOpFamilyStmt CreatePLangStmt
 		CreateSchemaStmt CreateSeqStmt CreateStmt CreateTableSpaceStmt
 		CreateAssertStmt CreateTrigStmt CreateUserStmt CreateRoleStmt
-		CreatedbStmt DeclareCursorStmt DefineStmt DeleteStmt
+		CreatedbStmt DeclareCursorStmt DefineStmt DeleteStmt DiscardStmt
 		DropGroupStmt DropOpClassStmt DropOpFamilyStmt DropPLangStmt DropStmt
 		DropAssertStmt DropTrigStmt DropRuleStmt DropCastStmt DropRoleStmt
 		DropUserStmt DropdbStmt DropTableSpaceStmt ExplainStmt FetchStmt
@@ -382,7 +382,7 @@ static Node *makeXmlExpr(XmlExprOp op, char *name, List *named_args, List *args)
 
 	DATABASE DAY_P DEALLOCATE DEC DECIMAL_P DECLARE DEFAULT DEFAULTS
 	DEFERRABLE DEFERRED DEFINER DELETE_P DELIMITER DELIMITERS
-	DESC DISABLE_P DISTINCT DO DOCUMENT_P DOMAIN_P DOUBLE_P DROP
+	DESC DISABLE_P DISCARD DISTINCT DO DOCUMENT_P DOMAIN_P DOUBLE_P DROP
 
 	EACH ELSE ENABLE_P ENCODING ENCRYPTED END_P ENUM_P ESCAPE EXCEPT EXCLUDING
 	EXCLUSIVE EXECUTE EXISTS EXPLAIN EXTERNAL EXTRACT
@@ -416,7 +416,7 @@ static Node *makeXmlExpr(XmlExprOp op, char *name, List *named_args, List *args)
 	OBJECT_P OF OFF OFFSET OIDS OLD ON ONLY OPERATOR OPTION OR
 	ORDER OUT_P OUTER_P OVERLAPS OVERLAY OWNED OWNER
 
-	PARTIAL PASSWORD PLACING POSITION
+	PARTIAL PASSWORD PLACING PLANS POSITION
 	PRECISION PRESERVE PREPARE PREPARED PRIMARY
 	PRIOR PRIVILEGES PROCEDURAL PROCEDURE
 
@@ -569,6 +569,7 @@ stmt :
 			| DeclareCursorStmt
 			| DefineStmt
 			| DeleteStmt
+			| DiscardStmt
 			| DropAssertStmt
 			| DropCastStmt
 			| DropGroupStmt
@@ -1328,6 +1329,40 @@ CheckPointStmt:
 		;
 
 
+/*****************************************************************************
+ *
+ * DISCARD { ALL | TEMP | PLANS }
+ *
+ *****************************************************************************/
+
+DiscardStmt:
+			DISCARD ALL
+				{
+					DiscardStmt *n = makeNode(DiscardStmt);
+					n->target = DISCARD_ALL;
+					$$ = (Node *) n;
+				}
+			| DISCARD TEMP
+				{
+					DiscardStmt *n = makeNode(DiscardStmt);
+					n->target = DISCARD_TEMP;
+					$$ = (Node *) n;
+				}
+			| DISCARD TEMPORARY
+				{
+					DiscardStmt *n = makeNode(DiscardStmt);
+					n->target = DISCARD_TEMP;
+					$$ = (Node *) n;
+				}
+			| DISCARD PLANS
+				{
+					DiscardStmt *n = makeNode(DiscardStmt);
+					n->target = DISCARD_PLANS;
+					$$ = (Node *) n;
+				}
+		;
+
+
 /*****************************************************************************
  *
  *	ALTER [ TABLE | INDEX ] variations
@@ -8796,6 +8831,7 @@ unreserved_keyword:
 			| DELIMITER
 			| DELIMITERS
 			| DISABLE_P
+			| DISCARD
 			| DOCUMENT_P
 			| DOMAIN_P
 			| DOUBLE_P
@@ -8881,6 +8917,7 @@ unreserved_keyword:
 			| OWNER
 			| PARTIAL
 			| PASSWORD
+			| PLANS
 			| PREPARE
 			| PREPARED
 			| PRESERVE
diff --git a/src/backend/parser/keywords.c b/src/backend/parser/keywords.c
index 9f6cf1e20e4..5c8ef10a214 100644
--- a/src/backend/parser/keywords.c
+++ b/src/backend/parser/keywords.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/parser/keywords.c,v 1.186 2007/04/02 03:49:38 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/parser/keywords.c,v 1.187 2007/04/26 16:13:12 neilc Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -124,6 +124,7 @@ static const ScanKeyword ScanKeywords[] = {
 	{"delimiters", DELIMITERS},
 	{"desc", DESC},
 	{"disable", DISABLE_P},
+	{"discard", DISCARD},
 	{"distinct", DISTINCT},
 	{"do", DO},
 	{"document", DOCUMENT_P},
@@ -269,6 +270,7 @@ static const ScanKeyword ScanKeywords[] = {
 	{"partial", PARTIAL},
 	{"password", PASSWORD},
 	{"placing", PLACING},
+	{"plans", PLANS},
 	{"position", POSITION},
 	{"precision", PRECISION},
 	{"prepare", PREPARE},
-- 
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