diff options
| -rw-r--r-- | src/backend/access/heap/visibilitymap.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/backend/access/heap/visibilitymap.c b/src/backend/access/heap/visibilitymap.c index 58bab7df102..4b83315263c 100644 --- a/src/backend/access/heap/visibilitymap.c +++ b/src/backend/access/heap/visibilitymap.c @@ -352,11 +352,15 @@ visibilitymap_truncate(Relation rel, BlockNumber nheapblocks) /* Clear out the unwanted bytes. */ MemSet(&map[truncByte + 1], 0, MAPSIZE - (truncByte + 1)); - /* + /*---- * Mask out the unwanted bits of the last remaining byte. * - * ((1 << 0) - 1) = 00000000 ((1 << 1) - 1) = 00000001 ... ((1 << 6) - - * 1) = 00111111 ((1 << 7) - 1) = 01111111 + * ((1 << 0) - 1) = 00000000 + * ((1 << 1) - 1) = 00000001 + * ... + * ((1 << 6) - 1) = 00111111 + * ((1 << 7) - 1) = 01111111 + *---- */ map[truncByte] &= (1 << truncBit) - 1; |