diff options
Diffstat (limited to 'src/backend/commands/vacuum.c')
| -rw-r--r-- | src/backend/commands/vacuum.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/backend/commands/vacuum.c b/src/backend/commands/vacuum.c index 5decc5cac67..606e782ba98 100644 --- a/src/backend/commands/vacuum.c +++ b/src/backend/commands/vacuum.c @@ -485,8 +485,10 @@ vac_estimate_reltuples(Relation relation, bool is_analyze, return scanned_tuples; /* - * If scanned_pages is zero but total_pages isn't, keep the existing - * value of reltuples. + * If scanned_pages is zero but total_pages isn't, keep the existing value + * of reltuples. (Note: callers should avoid updating the pg_class + * statistics in this situation, since no new information has been + * provided.) */ if (scanned_pages == 0) return old_rel_tuples; |