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Diffstat (limited to 'src/backend/commands/cluster.c')
| -rw-r--r-- | src/backend/commands/cluster.c | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/src/backend/commands/cluster.c b/src/backend/commands/cluster.c index 4519c00e223..051b806aa72 100644 --- a/src/backend/commands/cluster.c +++ b/src/backend/commands/cluster.c @@ -476,16 +476,6 @@ check_index_is_clusterable(Relation OldHeap, Oid indexOid, bool recheck, LOCKMOD * mark_index_clustered: mark the specified index as the one clustered on * * With indexOid == InvalidOid, will mark all indexes of rel not-clustered. - * - * Note: we do transactional updates of the pg_index rows, which are unsafe - * against concurrent SnapshotNow scans of pg_index. Therefore this is unsafe - * to execute with less than full exclusive lock on the parent table; - * otherwise concurrent executions of RelationGetIndexList could miss indexes. - * - * XXX: Now that we have MVCC catalog access, SnapshotNow scans of pg_index - * shouldn't be common enough to worry about. The above comment needs - * to be updated, and it may be possible to simplify the logic here in other - * ways also. */ void mark_index_clustered(Relation rel, Oid indexOid, bool is_internal) |