15.00 - Teradata Database Mechanisms for Multi-Value Compression - Teradata Database

Teradata Database Design

prodname
Teradata Database
vrm_release
15.00
category
User Guide
featnum
B035-1094-015K

Teradata Database Mechanisms for Multi-Value Compression

Multi-Value Compression Algorithm

Teradata Database uses a non‑adaptive, lossless, corruption‑resistant multi-value compression algorithm called the Dictionary Index method to compress values independently on a column‑by‑column basis. The list of compressible values is stored in the table header as an array, and presence bits are allocated in the row where an index into the array can be stored.