diff options
Diffstat (limited to 'src/backend')
| -rw-r--r-- | src/backend/nodes/bitmapset.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/backend/nodes/bitmapset.c b/src/backend/nodes/bitmapset.c index 9bf9a29d6b1..6208f4ed936 100644 --- a/src/backend/nodes/bitmapset.c +++ b/src/backend/nodes/bitmapset.c @@ -867,6 +867,10 @@ bms_add_range(Bitmapset *a, int lower, int upper) ushiftbits, wordnum; + /* do nothing if nothing is called for, without further checking */ + if (upper < lower) + return a; + if (lower < 0 || upper < 0) elog(ERROR, "negative bitmapset member not allowed"); if (lower > upper) @@ -878,13 +882,12 @@ bms_add_range(Bitmapset *a, int lower, int upper) a = (Bitmapset *) palloc0(BITMAPSET_SIZE(uwordnum + 1)); a->nwords = uwordnum + 1; } - - /* ensure we have enough words to store the upper bit */ else if (uwordnum >= a->nwords) { int oldnwords = a->nwords; int i; + /* ensure we have enough words to store the upper bit */ a = (Bitmapset *) repalloc(a, BITMAPSET_SIZE(uwordnum + 1)); a->nwords = uwordnum + 1; /* zero out the enlarged portion */ |