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-rw-r--r--sql/sql_window.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/sql/sql_window.cc b/sql/sql_window.cc
index 1a405ec198e..e479faa73d3 100644
--- a/sql/sql_window.cc
+++ b/sql/sql_window.cc
@@ -1834,7 +1834,7 @@ bool Window_funcs_sort::setup(THD *thd, SQL_SELECT *sel,
ORDER* sort_order= concat_order_lists(thd->mem_root,
spec->partition_list->first,
spec->order_list->first);
- filesort= new (thd->mem_root) Filesort(sort_order, HA_POS_ERROR, NULL);
+ filesort= new (thd->mem_root) Filesort(sort_order, HA_POS_ERROR, true, NULL);
/* Apply the same condition that the subsequent sort has. */
filesort->select= sel;