17.10 - UncompressReservedSpace - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - Database Utilities

Advanced SQL Engine
Teradata Database
Release Number
Release Date
July 2021
Content Type
Publication ID
English (United States)

Specifies the minimum percentage of storage space that must remain available while DBs are uncompressed using the Ferret UNCOMPRESS command. The uncompress operation is terminated at the point where this threshold would be exceeded.

Field Group


Valid Range

1 through 90%



Changes Take Effect

After the DBS Control Record has been written.

Usage Notes

The table undergoing decompression at the time this field value is exceeded may remain in a partially compressed state. This will not affect the functioning of the table or database. To make the table DBs consistent with respect to compression, either issue the Ferret COMPRESS command, or free some storage space, then reissue the UNCOMPRESS command.

Set this field to represent the expected peak amount of required spool space.

Related Information

For more information on... See...
COMPRESS and UNCOMPRESS commands Ferret Utility (ferret).