execute_and_clear

# File activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb, line 583
        def execute_and_clear(sql, name, binds)
          result = without_prepared_statement?(binds) ? exec_no_cache(sql, name, binds) :
                                                        exec_cache(sql, name, binds)
          ret = yield result
          result.clear
          ret
        end