15.00 - Block-Level Compression and Hash Indexes - Teradata Database

Teradata Database SQL Data Definition Language Detailed Topics

Product
Teradata Database
Release Number
15.00
Content Type
Programming Reference
Publication ID
B035-1184-015K
Language
English (United States)

Block-Level Compression and Hash Indexes

Hash index rows can be compressed at the data block level or not, depending on whether they have been compressed or decompressed using the Ferret utility (see Utilities: Volume 1 (A-K) for information about the Ferret utility).

All limits on data block sizes apply to the uncompressed size of a hash index. Block compression does not raise any of these limits, nor does it enable more data to be stored in a single data block than can be stored in an uncompressed data block of the same size.