use python3.9 compatible union type hint

Signed-off-by: shanhaikang.shk <shanhaikang.shk@oceanbase.com>

Author: GITHUBear

pyobvector/json_table/oceanbase_dialect.py

@@ -64,7 +64,7 @@ def _parse_alter_table_alter(self) -> t.Optional[exp.Expression]:
                 using=self._match(TokenType.USING) and self._parse_assignment(),
             )
 
-        def _parse_drop(self, exists: bool = False) -> exp.Drop | exp.Command:
+        def _parse_drop(self, exists: bool = False) -> t.Union[exp.Drop, exp.Command]:
             temporary = self._match(TokenType.TEMPORARY)
             materialized = self._match_text_seq("MATERIALIZED")
 

tests/test_json_table.py

@@ -302,7 +302,7 @@ def test_dml(self):
         )
 
         res = self.client.perform_json_table_sql(
-            "select * from t1 where CHAR_LENGTH(c2) > 10 or c4 > 50 order by c4"
+            "select * from t1 where CHAR_LENGTH(c2) > 10 or c4 > '50' order by c4"
         )
         self.assertEqual(
             get_all_rows(res),