diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/access/heap/heapam_handler.c | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/src/backend/access/heap/heapam_handler.c b/src/backend/access/heap/heapam_handler.c index 9f17baea5d6..53f572f384b 100644 --- a/src/backend/access/heap/heapam_handler.c +++ b/src/backend/access/heap/heapam_handler.c @@ -2574,11 +2574,8 @@ SampleHeapTupleVisible(TableScanDesc scan, Buffer buffer, if (scan->rs_flags & SO_ALLOW_PAGEMODE) { - uint32 start, - end; - - if (hscan->rs_ntuples == 0) - return false; + uint32 start = 0, + end = hscan->rs_ntuples; /* * In pageatatime mode, heap_prepare_pagescan() already did visibility @@ -2589,18 +2586,15 @@ SampleHeapTupleVisible(TableScanDesc scan, Buffer buffer, * in increasing order, but it's not clear that there would be enough * gain to justify the restriction. */ - start = 0; - end = hscan->rs_ntuples - 1; - - while (start <= end) + while (start < end) { - uint32 mid = (start + end) / 2; + uint32 mid = start + (end - start) / 2; OffsetNumber curoffset = hscan->rs_vistuples[mid]; if (tupoffset == curoffset) return true; else if (tupoffset < curoffset) - end = mid - 1; + end = mid; else start = mid + 1; } |