diff options
Diffstat (limited to 'src/backend/commands/vacuum.c')
| -rw-r--r-- | src/backend/commands/vacuum.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/src/backend/commands/vacuum.c b/src/backend/commands/vacuum.c index 41ca15c6627..c5170efea50 100644 --- a/src/backend/commands/vacuum.c +++ b/src/backend/commands/vacuum.c @@ -97,6 +97,7 @@ vacuum(VacuumStmt *vacstmt, Oid relid, bool do_toast, volatile bool in_outer_xact, use_own_xacts; List *relations; + static bool in_vacuum = false; /* sanity checks on options */ Assert(vacstmt->options & (VACOPT_VACUUM | VACOPT_ANALYZE)); @@ -123,6 +124,14 @@ vacuum(VacuumStmt *vacstmt, Oid relid, bool do_toast, in_outer_xact = IsInTransactionChain(isTopLevel); /* + * Due to static variables vac_context, anl_context and vac_strategy, + * vacuum() is not reentrant. This matters when VACUUM FULL or ANALYZE + * calls a hostile index expression that itself calls ANALYZE. + */ + if (in_vacuum) + elog(ERROR, "%s cannot be executed from VACUUM or ANALYZE", stmttype); + + /* * Send info about dead objects to the statistics collector, unless we are * in autovacuum --- autovacuum.c does this for itself. */ @@ -214,6 +223,7 @@ vacuum(VacuumStmt *vacstmt, Oid relid, bool do_toast, { ListCell *cur; + in_vacuum = true; VacuumCostActive = (VacuumCostDelay > 0); VacuumCostBalance = 0; @@ -255,13 +265,13 @@ vacuum(VacuumStmt *vacstmt, Oid relid, bool do_toast, } PG_CATCH(); { - /* Make sure cost accounting is turned off after error */ + in_vacuum = false; VacuumCostActive = false; PG_RE_THROW(); } PG_END_TRY(); - /* Turn off vacuum cost accounting */ + in_vacuum = false; VacuumCostActive = false; /* |