executor: fix wrong enum key in point get

executor/batch_point_get_test.go

@@ -156,6 +156,16 @@ func (s *testBatchPointGetSuite) TestIssue18843(c *C) {
 	tk.MustQuery("select * from t18843 where f is null").Check(testkit.Rows("2 <nil>"))
 }
 
+func (s *testBatchPointGetSuite) TestIssue24562(c *C) {
+	tk := testkit.NewTestKit(c, s.store)
+	tk.MustExec("use test")
+	tk.MustExec("drop table if exists ttt")
+	tk.MustExec("create table ttt(a enum(\"a\",\"b\",\"c\",\"d\"), primary key(a));")
+	tk.MustExec("insert into ttt values(1)")
+	tk.MustQuery("select * from ttt where ttt.a in (\"1\",\"b\")").Check(testkit.Rows())
+	tk.MustQuery("select * from ttt where ttt.a in (1,\"b\")").Check(testkit.Rows("a"))
+}
+
 func (s *testBatchPointGetSuite) TestBatchPointGetUnsignedHandleWithSort(c *C) {
 	tk := testkit.NewTestKit(c, s.store)
 	tk.MustExec("use test")

executor/point_get.go

@@ -442,6 +442,16 @@ func EncodeUniqueIndexValuesForKey(ctx sessionctx.Context, tblInfo *model.TableI
 			var str string
 			str, err = idxVals[i].ToString()
 			idxVals[i].SetString(str, colInfo.FieldType.Collate)
+		} else if colInfo.Tp == mysql.TypeEnum && (idxVals[i].Kind() == types.KindString || idxVals[i].Kind() == types.KindBytes || idxVals[i].Kind() == types.KindBinaryLiteral) {
+			var str string
+			var e types.Enum
+			str, _ = idxVals[i].ToString()
+			e, err = types.ParseEnumName(colInfo.FieldType.Elems, str, colInfo.FieldType.Collate)
+			if err != nil {
+				e = types.Enum{}
+				err = nil
+			}
+			idxVals[i].SetMysqlEnum(e, colInfo.FieldType.Collate)
 		} else {
 			// If a truncated error or an overflow error is thrown when converting the type of `idxVal[i]` to
 			// the type of `colInfo`, the `idxVal` does not exist in the `idxInfo` for sure.