Updates columns names in where clause to be fully qualified ex: SELECT * FROM users WHERE name = 'John' becomes SELECT * FROM users WHERE "users"."name" = 'John' To view query tree use tree.ToStringTree(parser.RuleNames, parser) Example query tree for SELECT * FROM users WHERE name = 'John' (tsql_file (batch (sql_clauses (dml_clause (select_statement_standalone (select_statement (query_expression (query_specification SELECT (select_list (select_list_elem (asterisk *))) FROM (table_sources (table_source (table_source_item (full_table_name (id_ users))))) WHERE (search_condition (predicate (expression (full_column_name (id_ (keyword name)))) (comparison_operator =) (expression (primitive_expression (primitive_constant 'John')))))))))))) <EOF>) */.