Block-Level Compression and Hash Indexes - Analytics Database - Teradata Vantage

SQL Data Definition Language Detailed Topics

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
VMware
Product
Analytics Database
Teradata Vantage
Release Number
17.20
Published
June 2022
Language
English (United States)
Last Update
2023-07-11
dita:mapPath
vuk1628111288877.ditamap
dita:ditavalPath
qkf1628213546010.ditaval
dita:id
B035-1184
lifecycle
latest
Product Category
Teradata Vantage™

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.