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-rw-r--r--src/backend/utils/cache/syscache.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/backend/utils/cache/syscache.c b/src/backend/utils/cache/syscache.c
index 93f5c4b722b..a9fc4288472 100644
--- a/src/backend/utils/cache/syscache.c
+++ b/src/backend/utils/cache/syscache.c
@@ -1257,7 +1257,8 @@ SearchSysCacheLocked1(int cacheId,
/*
* If an inplace update just finished, ensure we process the syscache
- * inval.
+ * inval. XXX this is insufficient: the inplace updater may not yet
+ * have reached AtEOXact_Inval(). See test at inplace-inval.spec.
*
* If a heap_update() call just released its LOCKTAG_TUPLE, we'll
* probably find the old tuple and reach "tuple concurrently updated".