17.10 - SysSampleOption - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - Database Utilities

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Configuration
Publication ID
B035-1102-171K
Language
English (United States)

Specifies whether Vantage should determine the appropriate amount of table data to sample for statistics collection. If not, the sample size will be 100%.

This field is used only when a COLLECT STATISTICS SQL statement does not specify the USING SAMPLE option.

Field Group

Optimizer Statistics

Valid Settings

Setting Description
0 Use Teradata default, currently equivalent to setting 1.
1 Enables system-determined sample percentage up to 100%.
2 Sample percentage is 100% (full statistics).

Default

0

Changes Take Effect

After the DBS Control Record has been written.

Usage Notes

Statistics are used by the optimizer to improve query performance.

Related Information

For more information on… See…
Optimizer statistics fields