add test case

pingcap · Nov 12, 2018 · 897d2be · 897d2be
1 parent a9a8b9b
commit 897d2be
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/planner/core/physical_plan_test.go b/planner/core/physical_plan_test.go
@@ -194,6 +194,10 @@ func (s *testPlanSuite) TestDAGPlanBuilderSimpleCase(c *C) {
 			sql:  "select * from ((SELECT 1 a,3 b) UNION (SELECT 2,1) ORDER BY (SELECT 2)) t order by a,b",
 			best: "UnionAll{Dual->Projection->Dual->Projection}->HashAgg->Sort",
 		},
+		{
+			sql:  "select * from ((SELECT 1 a,6 b) UNION (SELECT 2,5) UNION (SELECT 2, 4) ORDER BY 1) t order by 1, 2",
+			best: "UnionAll{Dual->Projection->Dual->Projection->Dual->Projection}->HashAgg->Sort->Sort",
+		},
 	}
 	for i, tt := range tests {
 		comment := Commentf("case:%v sql:%s", i, tt.sql)