To specify the estimated number of rows to be copies from a file to a table, use the with row_estimate option. The DBMS Server uses the specified value to allocate memory for sorting rows before inserting them into the table. An accurate estimate can enhance the performance of the copy operation.

The estimated number of rows must be no less than 0 and no greater than 2,147,483,647. If you omit this parameter, the default value is 0, in which case the DBMS Server makes its own estimates for disk and memory requirements.