def transform_source_rows(self):
<EOL>self._time0 = time.perf_counter()<EOL>self.pre_transform_source_rows()<EOL>with self._source_reader:<EOL><INDENT>with self._transformed_writer:<EOL><INDENT>with self._parked_writer:<EOL><INDENT>with self._ignored_writer:<EOL><INDENT>self._transform_rows()<EOL><DEDENT><DEDENT><DEDENT><DEDENT>self._time1 = time.perf_counter()<EOL>self._load_transformed_rows()<EOL>self._time2 = time.perf_counter()<EOL>self._load_ignored_rows()<EOL>self._load_parked_rows()<EOL>self._time3 = time.perf_counter()<EOL>self._log_statistics()<EOL>
Transforms the rows for the source system into (partial) dimensional data.