IBM Extension
IBM Extension
Special Considerations for Device Types DISK, DATABASE, and FORMATFILE
Only a physical file is cleared when opened for OUTPUT. When the file is successfully opened, it contains no records. If an attempt is made to open a logical file for OUTPUT, the file is opened but no records are deleted. The file is treated as though the EXTEND phrase had been specified. To clear a logical file, all the members on which the logical file is based should be cleared.
End of IBM Extension