diff options
Diffstat (limited to 'src/backend/commands/vacuum.c')
| -rw-r--r-- | src/backend/commands/vacuum.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/src/backend/commands/vacuum.c b/src/backend/commands/vacuum.c index 215c77bc985..9d2c7234b7e 100644 --- a/src/backend/commands/vacuum.c +++ b/src/backend/commands/vacuum.c @@ -13,7 +13,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.389.2.2 2009/11/10 18:00:26 alvherre Exp $ + * $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.389.2.3 2009/12/09 21:58:04 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -48,6 +48,7 @@ #include "utils/builtins.h" #include "utils/flatfiles.h" #include "utils/fmgroids.h" +#include "utils/guc.h" #include "utils/inval.h" #include "utils/lsyscache.h" #include "utils/memutils.h" @@ -1022,7 +1023,8 @@ vacuum_rel(Oid relid, VacuumStmt *vacstmt, bool do_toast, bool for_wraparound, LockRelId onerelid; Oid toast_relid; Oid save_userid; - bool save_secdefcxt; + int save_sec_context; + int save_nestlevel; bool heldoff; if (scanned_all) @@ -1181,10 +1183,14 @@ vacuum_rel(Oid relid, VacuumStmt *vacstmt, bool do_toast, bool for_wraparound, /* * Switch to the table owner's userid, so that any index functions are run - * as that user. (This is unnecessary, but harmless, for lazy VACUUM.) + * as that user. Also lock down security-restricted operations and + * arrange to make GUC variable changes local to this command. + * (This is unnecessary, but harmless, for lazy VACUUM.) */ - GetUserIdAndContext(&save_userid, &save_secdefcxt); - SetUserIdAndContext(onerel->rd_rel->relowner, true); + GetUserIdAndSecContext(&save_userid, &save_sec_context); + SetUserIdAndSecContext(onerel->rd_rel->relowner, + save_sec_context | SECURITY_RESTRICTED_OPERATION); + save_nestlevel = NewGUCNestLevel(); /* * Do the actual work --- either FULL or "lazy" vacuum @@ -1194,8 +1200,11 @@ vacuum_rel(Oid relid, VacuumStmt *vacstmt, bool do_toast, bool for_wraparound, else heldoff = lazy_vacuum_rel(onerel, vacstmt, vac_strategy, scanned_all); - /* Restore userid */ - SetUserIdAndContext(save_userid, save_secdefcxt); + /* Roll back any GUC changes executed by index functions */ + AtEOXact_GUC(false, save_nestlevel); + + /* Restore userid and security context */ + SetUserIdAndSecContext(save_userid, save_sec_context); /* all done with this class, but hold lock until commit */ relation_close(onerel, NoLock); |