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-rw-r--r--src/backend/access/nbtree/nbtutils.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/backend/access/nbtree/nbtutils.c b/src/backend/access/nbtree/nbtutils.c
index 81589b9056d..2f5f14e527d 100644
--- a/src/backend/access/nbtree/nbtutils.c
+++ b/src/backend/access/nbtree/nbtutils.c
@@ -1877,7 +1877,8 @@ _bt_killitems(IndexScanDesc scan)
* Since this can be redone later if needed, mark as dirty hint.
*
* Whenever we mark anything LP_DEAD, we also set the page's
- * BTP_HAS_GARBAGE flag, which is likewise just a hint.
+ * BTP_HAS_GARBAGE flag, which is likewise just a hint. (Note that we
+ * only rely on the page-level flag in !heapkeyspace indexes.)
*/
if (killedsomething)
{