add test

executor/join_test.go

@@ -851,6 +851,19 @@ func (s *testSuite) TestIndexLookupJoin(c *C) {
 		`1.01`,
 		`2.02`,
 	))
+
+	tk.MustExec(`drop table if exists t;`)
+	tk.MustExec(`create table t(a bigint, b bigint, unique key idx1(a, b));`)
+	tk.MustExec(`insert into t values(1, 1), (1, 2), (1, 3), (1, 4), (1, 5), (1, 6);`)
+	tk.MustExec(`set @@tidb_max_chunk_size = 2;`)
+	tk.MustQuery(`select /*+ TIDB_INLJ(t1) */ * from t t1 left join t t2 on t1.a = t2.a and t1.b = t2.b + 4;`).Check(testkit.Rows(
+		`1 1 <nil> <nil>`,
+		`1 2 <nil> <nil>`,
+		`1 3 <nil> <nil>`,
+		`1 4 <nil> <nil>`,
+		`1 5 1 1`,
+		`1 6 1 2`,
+	))
 }
 
 func (s *testSuite) TestMergejoinOrder(c *C) {