fix a small bug in sql

Author: billy-inn

asdl/lang/sql/sql_transition_system.py

@@ -130,7 +130,7 @@ def get_valid_continuation_types(self, hyp):
             return ApplyRuleAction,
 
     def get_primitive_field_actions(self, realized_field):
-        if realized_field.type.name == 'column_idx' is not None:
+        if realized_field.type.name == 'column_idx':
             return [WikiSqlSelectColumnAction(int(realized_field.value))]
         elif realized_field.type.name == 'string':
             tokens = str(realized_field.value).split(' ') + ['</primitive>']
@@ -169,4 +169,4 @@ def check():
 
 
 if __name__ == '__main__':
-    check()
+    check()