diff options
| -rw-r--r-- | src/backend/access/heap/heapam.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/src/backend/access/heap/heapam.c b/src/backend/access/heap/heapam.c index 07e9d24013d..698d08d1d39 100644 --- a/src/backend/access/heap/heapam.c +++ b/src/backend/access/heap/heapam.c @@ -4217,11 +4217,10 @@ l2: { /* * Since the new tuple is going into the same page, we might be able - * to do a HOT update. Check if any of the index columns have been - * changed, or if we have projection functional indexes, check whether - * the old and the new values are the same. If the page was already - * full, we may have skipped checking for index columns. If so, HOT - * update is possible. + * to do a HOT update. A HOT update is possible if none of the index + * columns, nor columns used in projection functional indexes, have + * changed. If the page was already full, we may have skipped + * checking for index columns, and also can't do a HOT update. */ if (hot_attrs_checked && !bms_overlap(modified_attrs, hot_attrs) |