The ILOB COMPRESSION option provides a capability to compress the data of an internal LOB item. There is only one compression algorithm per database.

You must set the ILOB COMPRESSION option with the INTERNAL LOBS option. An error occurs if this is not done. Changing the ILOB COMPRESSION option requires a database reorganization. However, changing the option to FALSE from LZW or blank, is not supported. The applications that access the internal LOB do not need to be recompiled.

Refer to the ASSIGN Statement in the ALGOL Programming Reference Manual, Volume 2, or the ASSIGN Statement in the COBOL ANSI-85 Programming Reference Manual, Volume 2 for additional information about using LOB with compression.