palnner: add unit test for ifnull args with signed and unsigned (#17652)

pingcap · Nov 16, 2020 · ab1fafe · ab1fafe
1 parent efc9e9f
commit ab1fafe
Showing 1 changed file with 18 additions and 0 deletions.
diff --git a/planner/core/expression_rewriter_test.go b/planner/core/expression_rewriter_test.go
@@ -325,3 +325,21 @@ func (s *testExpressionRewriterSuite) TestIssue9869(c *C) {
 	tk.MustQuery("select (case t1.a when 0 then 0 else t1.b end), cast(t1.b as signed)  from t1;").Check(
 		testkit.Rows("4572794622775114594 4572794622775114594", "18196094287899841997 -250649785809709619", "11120436154190595086 -7326307919518956530"))
 }
+
+func (s *testExpressionRewriterSuite) TestIssue17652(c *C) {
+	defer testleak.AfterTest(c)()
+	store, dom, err := newStoreWithBootstrap()
+	c.Assert(err, IsNil)
+	tk := testkit.NewTestKit(c, store)
+	defer func() {
+		dom.Close()
+		store.Close()
+	}()
+
+	tk.MustExec("use test;")
+	tk.MustExec("drop table if exists t;")
+	tk.MustExec("create table t(x bigint unsigned);")
+	tk.MustExec("insert into t values( 9999999703771440633);")
+	tk.MustQuery("select ifnull(max(x), 0) from t").Check(
+		testkit.Rows("9999999703771440633"))
+}