Remove subquery support

Author: passren

pymongosql/sql/handler.py

@@ -956,22 +956,9 @@ def can_handle(self, ctx: Any) -> bool:
         """Check if this is a from context"""
         return hasattr(ctx, "tableReference")
 
-    # Subquery alias parsing and filter-key rewriting has been delegated to SubqueryResolver.
-    # See `pymongosql/sql/subquery.py` for the implementation.
-    pass
-
     def handle_visitor(self, ctx: PartiQLParser.FromClauseContext, parse_result: "ParseResult") -> Any:
         if hasattr(ctx, "tableReference") and ctx.tableReference():
             table_text = ctx.tableReference().getText()
-
-            # Detect wrapped subquery pattern: (SELECT ...) alias
-            from .subquery import SubqueryResolver
-
-            if SubqueryResolver.is_wrapped_subquery_text(table_text):
-                resolver = SubqueryResolver()
-                return resolver.resolve_and_apply(table_text, parse_result)
-
-            # Default: simple table reference
             collection_name = table_text
             parse_result.collection = collection_name
             return collection_name

pymongosql/sql/subquery.py

@@ -300,21 +300,6 @@ def test_parser_error_handling(self):
             parser = SQLParser("INVALID SQL SYNTAX")
             parser.get_execution_plan()
 
-    def test_superset_wrapped_subquery(self):
-        """Support Superset wrapping subquery with alias 'virtual'"""
-        sql = "SELECT virtual.a, virtual.b FROM (SELECT a, b FROM users WHERE c = 1) virtual"
-        parser = SQLParser(sql)
-
-        assert not parser.has_errors, f"Parser errors: {parser.errors}"
-
-        execution_plan = parser.get_execution_plan()
-        # After unwrapping, collection should be inner collection
-        assert execution_plan.collection == "users"
-        # Projections should be remapped to inner fields
-        assert execution_plan.projection_stage == {"a": 1, "b": 1}
-        # Inner filter should be preserved
-        assert execution_plan.filter_stage == {"c": 1}
-
     def test_different_collection_names(self):
         """Test parsing with different collection names"""
         test_cases = [