16.20 - Block-Level Compression and Hash Indexes - Teradata Database - Teradata Vantage NewSQL Engine

Teradata Vantage™ SQL Data Definition Language Detailed Topics

Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Release Date
March 2019
Content Type
Programming Reference
Publication ID
B035-1184-162K
Language
English (United States)

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. For information about the Ferret utility, see Teradata Vantage™ - Database Utilities , B035-1102 .

All limits on data block sizes apply to the noncompressed 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 noncompressed data block of the same size.