diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/commands/statscmds.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/backend/commands/statscmds.c b/src/backend/commands/statscmds.c index 8d483dbb3a7..46abadcc811 100644 --- a/src/backend/commands/statscmds.c +++ b/src/backend/commands/statscmds.c @@ -96,7 +96,13 @@ CreateStatistics(CreateStatsStmt *stmt) errmsg("statistics \"%s\" already exist", namestr))); } - rel = heap_openrv(stmt->relation, AccessExclusiveLock); + /* + * CREATE STATISTICS will influence future execution plans but does + * not interfere with currently executing plans so it is safe to + * take only ShareUpdateExclusiveLock on relation, conflicting with + * ANALYZE and other DDL that sets statistical information. + */ + rel = heap_openrv(stmt->relation, ShareUpdateExclusiveLock); relid = RelationGetRelid(rel); if (rel->rd_rel->relkind != RELKIND_RELATION && |