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Install a more future-proof fix for the snapshot-unset bug just found.

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Per suggestion from Tom Lane.
This commit is contained in:
Alvaro Herrera 2005-11-28 17:23:11 +00:00
parent b79cb1eea1
commit f1713078c5
1 changed files with 7 additions and 9 deletions
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16
src/backend/postmaster/autovacuum.c
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@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/postmaster/autovacuum.c,v 1.7 2005/11/28 13:35:09 alvherre Exp $
* $PostgreSQL: pgsql/src/backend/postmaster/autovacuum.c,v 1.8 2005/11/28 17:23:11 alvherre Exp $
*
*-------------------------------------------------------------------------
*/
@ -495,6 +495,9 @@ process_whole_db(void)
/* Start a transaction so our commands have one to play into. */
StartTransactionCommand();
/* functions in indexes may want a snapshot set */
ActiveSnapshot = CopySnapshot(GetTransactionSnapshot());
dbRel = heap_open(DatabaseRelationId, AccessShareLock);
/* Must use a table scan, since there's no syscache for pg_database */
@ -556,6 +559,9 @@ do_autovacuum(PgStat_StatDBEntry *dbentry)
/* Start a transaction so our commands have one to play into. */
StartTransactionCommand();
/* functions in indexes may want a snapshot set */
ActiveSnapshot = CopySnapshot(GetTransactionSnapshot());
/*
* StartTransactionCommand and CommitTransactionCommand will automatically
* switch to other contexts. We need this one to keep the list of
@ -898,14 +904,6 @@ autovacuum_do_vac_analyze(List *relids, bool dovacuum, bool doanalyze,
vacstmt->relation = NULL; /* all tables, or not used if relids != NIL */
vacstmt->va_cols = NIL;
/*
* Functions in indexes may want a snapshot set. Note we only need
* to do this in limited cases, because it'll be done in vacuum()
* otherwise.
*/
if (doanalyze && !dovacuum && relids != NIL)
ActiveSnapshot = CopySnapshot(GetTransactionSnapshot());
vacuum(vacstmt, relids);
pfree(vacstmt);