From 8b11581a1a05af169cce9496ad0169c584c83e0c Mon Sep 17 00:00:00 2001 From: "okbob@github.com" Date: Tue, 5 Apr 2022 00:13:58 +0200 Subject: [PATCH v20220916 07/13] 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 1059a5c865..542be13a40 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 d267cea0e1..8fbccd1db6 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 323354ea16..6d0bf1eba5 100644 --- a/src/include/nodes/parsenodes.h +++ b/src/include/nodes/parsenodes.h @@ -3568,7 +3568,8 @@ 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) -- 2.37.0