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

Teradata Database SQL Data Definition Language Detailed Topics

Teradata Database
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Programming Reference
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English (United States)

Block-Level Compression and Join Indexes

Join indexes 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 join 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.