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-rw-r--r--sql/item_subselect.cc3
1 files changed, 2 insertions, 1 deletions
diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc
index f2d7d69e173..d5f85e7ff5d 100644
--- a/sql/item_subselect.cc
+++ b/sql/item_subselect.cc
@@ -2389,7 +2389,8 @@ Item_in_subselect::select_in_like_transformer(JOIN *join)
object, but we can't know it here, but here we need address correct
reference on left expresion.
- //psergey: he means degenerate cases like "... IN (SELECT 1)"
+ note: we won't need Item_in_optimizer when handling degenerate cases
+ like "... IN (SELECT 1)"
*/
if (!optimizer)
{