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COMPRESSION clause SSL
176 U929-J-Z125-9-76
5.6 Storing the records of a record type in compressed form
COMPRESSION FOR ALL ITEMS
A record type containing an item of variable length may not be compressed.
Under CALL DML, records can be compressed by storing only part of the items belonging
to the record type (see the "Application Programming" manual, STORE 2).
The COMPRESSION clause is used if UDS/SQL is not to fill the omitted items with standard
values, but is to store records in the compressed form in which they exist at the CALL
interface.
For record types defined with LOCATION MODE IS CALC in the schema DDL compression
generates indirect CALC pages.
If this clause is specified, no records of the record type can be updated with SQL.