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-rw-r--r--src/backend/utils/adt/ruleutils.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/backend/utils/adt/ruleutils.c b/src/backend/utils/adt/ruleutils.c
index 855d48372a7..70d723e80ca 100644
--- a/src/backend/utils/adt/ruleutils.c
+++ b/src/backend/utils/adt/ruleutils.c
@@ -7500,7 +7500,8 @@ get_name_for_var_field(Var *var, int fieldno,
/*
* If it's a RowExpr that was expanded from a whole-row Var, use the
- * column names attached to it.
+ * column names attached to it. (We could let get_expr_result_tupdesc()
+ * handle this, but it's much cheaper to just pull out the name we need.)
*/
if (IsA(var, RowExpr))
{