diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/access/index/genam.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/backend/access/index/genam.c b/src/backend/access/index/genam.c index ede9660c9eb..76d3edd470e 100644 --- a/src/backend/access/index/genam.c +++ b/src/backend/access/index/genam.c @@ -703,6 +703,14 @@ systable_beginscan_ordered(Relation heapRelation, index_rescan(sysscan->iscan, key, nkeys, NULL, 0); sysscan->scan = NULL; + /* + * If CheckXidAlive is set then set a flag to indicate that system table + * scan is in-progress. See detailed comments in xact.c where these + * variables are declared. + */ + if (TransactionIdIsValid(CheckXidAlive)) + bsysscan = true; + return sysscan; } @@ -747,6 +755,14 @@ systable_endscan_ordered(SysScanDesc sysscan) index_endscan(sysscan->iscan); if (sysscan->snapshot) UnregisterSnapshot(sysscan->snapshot); + + /* + * Reset the bsysscan flag at the end of the systable scan. See detailed + * comments in xact.c where these variables are declared. + */ + if (TransactionIdIsValid(CheckXidAlive)) + bsysscan = false; + pfree(sysscan); } |