# File lib/dm-core/migrations.rb, line 861
      def field_exists?(storage_name, field_name)
        statement = "SELECT COUNT(*)\nFROM all_tab_columns\nWHERE owner = ?\nAND table_name = ?\nAND column_name = ?\n".compress_lines

        query(statement, schema_name, oracle_upcase(storage_name), oracle_upcase(field_name)).first > 0
      end