v20221124-1-0005-DISCARD-VARIABLES-command.patch
text/x-patch
Filename: v20221124-1-0005-DISCARD-VARIABLES-command.patch
Type: text/x-patch
Part: 6
Patch
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Format: format-patch
Series: patch v20221124-0005
Subject: DISCARD VARIABLES command
| File | + | − |
|---|---|---|
| src/backend/commands/discard.c | 6 | 0 |
| src/backend/parser/gram.y | 6 | 1 |
| src/backend/tcop/utility.c | 3 | 0 |
| src/include/nodes/parsenodes.h | 2 | 1 |
| src/include/tcop/cmdtaglist.h | 1 | 0 |
From d9276eb30a248fbaf935e2558286b467fa0fd89a Mon Sep 17 00:00:00 2001
From: "okbob@github.com" <okbob@github.com>
Date: Tue, 5 Apr 2022 00:13:58 +0200
Subject: [PATCH 05/10] DISCARD VARIABLES command
---
src/backend/commands/discard.c | 6 ++++++
src/backend/parser/gram.y | 7 ++++++-
src/backend/tcop/utility.c | 3 +++
src/include/nodes/parsenodes.h | 3 ++-
src/include/tcop/cmdtaglist.h | 1 +
5 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/src/backend/commands/discard.c b/src/backend/commands/discard.c
index c583539e0c..68fe550a71 100644
--- a/src/backend/commands/discard.c
+++ b/src/backend/commands/discard.c
@@ -19,6 +19,7 @@
#include "commands/discard.h"
#include "commands/prepare.h"
#include "commands/sequence.h"
+#include "commands/session_variable.h"
#include "utils/guc.h"
#include "utils/portal.h"
@@ -48,6 +49,10 @@ DiscardCommand(DiscardStmt *stmt, bool isTopLevel)
ResetTempTableNamespace();
break;
+ case DISCARD_VARIABLES:
+ ResetSessionVariables();
+ break;
+
default:
elog(ERROR, "unrecognized DISCARD target: %d", stmt->target);
}
@@ -75,4 +80,5 @@ DiscardAll(bool isTopLevel)
ResetPlanCache();
ResetTempTableNamespace();
ResetSequenceCaches();
+ ResetSessionVariables();
}
diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y
index 7ff97640a1..4f70048741 100644
--- a/src/backend/parser/gram.y
+++ b/src/backend/parser/gram.y
@@ -2024,7 +2024,12 @@ DiscardStmt:
n->target = DISCARD_SEQUENCES;
$$ = (Node *) n;
}
-
+ | DISCARD VARIABLES
+ {
+ DiscardStmt *n = makeNode(DiscardStmt);
+ n->target = DISCARD_VARIABLES;
+ $$ = (Node *) n;
+ }
;
diff --git a/src/backend/tcop/utility.c b/src/backend/tcop/utility.c
index d77fead276..d442a0dffa 100644
--- a/src/backend/tcop/utility.c
+++ b/src/backend/tcop/utility.c
@@ -2952,6 +2952,9 @@ CreateCommandTag(Node *parsetree)
case DISCARD_SEQUENCES:
tag = CMDTAG_DISCARD_SEQUENCES;
break;
+ case DISCARD_VARIABLES:
+ tag = CMDTAG_DISCARD_VARIABLES;
+ break;
default:
tag = CMDTAG_UNKNOWN;
}
diff --git a/src/include/nodes/parsenodes.h b/src/include/nodes/parsenodes.h
index 6175f0ca2f..d6f8e06170 100644
--- a/src/include/nodes/parsenodes.h
+++ b/src/include/nodes/parsenodes.h
@@ -3570,7 +3570,8 @@ typedef enum DiscardMode
DISCARD_ALL,
DISCARD_PLANS,
DISCARD_SEQUENCES,
- DISCARD_TEMP
+ DISCARD_TEMP,
+ DISCARD_VARIABLES
} DiscardMode;
typedef struct DiscardStmt
diff --git a/src/include/tcop/cmdtaglist.h b/src/include/tcop/cmdtaglist.h
index 357989b52f..09bd4d467f 100644
--- a/src/include/tcop/cmdtaglist.h
+++ b/src/include/tcop/cmdtaglist.h
@@ -135,6 +135,7 @@ PG_CMDTAG(CMDTAG_DISCARD_ALL, "DISCARD ALL", false, false, false)
PG_CMDTAG(CMDTAG_DISCARD_PLANS, "DISCARD PLANS", false, false, false)
PG_CMDTAG(CMDTAG_DISCARD_SEQUENCES, "DISCARD SEQUENCES", false, false, false)
PG_CMDTAG(CMDTAG_DISCARD_TEMP, "DISCARD TEMP", false, false, false)
+PG_CMDTAG(CMDTAG_DISCARD_VARIABLES, "DISCARD VARIABLES", false, false, false)
PG_CMDTAG(CMDTAG_DO, "DO", false, false, false)
PG_CMDTAG(CMDTAG_DROP_ACCESS_METHOD, "DROP ACCESS METHOD", true, false, false)
PG_CMDTAG(CMDTAG_DROP_AGGREGATE, "DROP AGGREGATE", true, false, false)
--
2.38.1