private Row GetOperationRow(IEnumerable<Row> batch, Fields fields) {
     var sql = SelectByKeys(batch);
     var row = new Row();
     row[_operationColumn] = new EntityDataExtract(fields, sql, _connection);
     return row;
 }
 private Row GetOperationRow(IEnumerable<Row> batch, Fields fields) {
     var sql = SelectByKeys(batch);
     var row = new Row();
     row[_operationColumn] = new EntityDataExtract(fields, sql, _connection);
     return row;
 }