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-rw-r--r--mysql-test/t/order_by.test12
1 files changed, 12 insertions, 0 deletions
diff --git a/mysql-test/t/order_by.test b/mysql-test/t/order_by.test
index 2d0c134a2d9..f61a6a8be34 100644
--- a/mysql-test/t/order_by.test
+++ b/mysql-test/t/order_by.test
@@ -2091,3 +2091,15 @@ set @@optimizer_switch=@tmp_8989;
set optimizer_switch='orderby_uses_equalities=on';
+
+--echo #
+--echo # MDEV-10880: Assertions `keypart_map' or
+--echo # `prebuilt->search_tuple->n_fields > 0' fail on DISTINCT and
+--echo # GROUP BY constant
+--echo #
+
+CREATE TABLE t1 (pk INT PRIMARY KEY);
+INSERT INTO t1 VALUES (1),(2),(3);
+SELECT DISTINCT pk FROM t1 GROUP BY 'foo';
+SELECT DISTINCT pk FROM t1;
+DROP TABLE t1;