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-rw-r--r--src/backend/optimizer/path/costsize.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/backend/optimizer/path/costsize.c b/src/backend/optimizer/path/costsize.c
index fb28e6411aa..7292d68dbcf 100644
--- a/src/backend/optimizer/path/costsize.c
+++ b/src/backend/optimizer/path/costsize.c
@@ -1957,7 +1957,7 @@ compute_cpu_sort_cost(PlannerInfo *root, List *pathkeys, int nPresortedKeys,
List *cache_varinfos = NIL;
/* fallback if pathkeys is unknown */
- if (list_length(pathkeys) == 0)
+ if (pathkeys == NIL)
{
/*
* If we'll use a bounded heap-sort keeping just K tuples in memory,