diff options
Diffstat (limited to 'src/include/access/nbtree.h')
| -rw-r--r-- | src/include/access/nbtree.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/include/access/nbtree.h b/src/include/access/nbtree.h index f2817590c41..09708c01c81 100644 --- a/src/include/access/nbtree.h +++ b/src/include/access/nbtree.h @@ -342,8 +342,10 @@ typedef struct xl_btree_reuse_page * The WAL record can represent deletion of any number of index tuples on a * single index page when executed by VACUUM. * - * The correctness requirement for applying these changes during recovery is - * that we must do one of these two things for every block in the index: + * For MVCC scans, lastBlockVacuumed will be set to InvalidBlockNumber. + * For a non-MVCC index scans there is an additional correctness requirement + * for applying these changes during recovery, which is that we must do one + * of these two things for every block in the index: * * lock the block for cleanup and apply any required changes * * EnsureBlockUnpinned() * The purpose of this is to ensure that no index scans started before we |