16.20 - Usage Notes - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Operators and User-Defined Functions

Advanced SQL Engine
Teradata Database
Release Number
Release Date
April 2020
Content Type
Programming Reference
Publication ID
English (United States)

Uncompressed character data in Teradata Database requires one byte per character when storing Latin character data. CAMSET_L takes Latin character input, compresses it into partial byte or one byte values, and returns the compressed result.

CAMSET_L provides best results for short or medium Latin strings that:

  • contain mainly digits and English alphabet letters.
  • do not frequently switch between:
    • lowercase and uppercase letters.
    • digits and letters.

Although you can call the function directly, CAMSET_L is normally used with algorithmic compression (ALC) to compress table columns. If CAMSET_L is used with ALC, nulls are also compressed if those columns are nullable.