17.00 - Example: Collecting Statistics on a Foreign Table Column - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Definition Language Syntax and Examples

Product
Advanced SQL Engine
Teradata Database
Release Number
17.00
Release Date
September 2020
Content Type
Programming Reference
Publication ID
B035-1144-170K
Language
English (United States)

Although you cannot collect statistics on the payload JSON column, you can collect statistics on specific data in the payload column of the foreign table by using dot notation and specifying an alias for the column data.

This example collects statistics on the City data in the payload column of the foreign table s3_tbl. For the payload.City, the statement specifies the alias City.

COLLECT STATS COLUMN(payload.City) AS City ON s3_tbl;

Cast any columns referenced in this statement to reasonable data types to improve performance of COLLECT STATS.

You cannot collect statistics on a $PATH expression.