DROP HASH INDEX Statement | Teradata Vantage - 17.10 - Restrictions on Dropping a Hash Index on a Table Concurrent With Dynamic AMP Sample Emulation on That Table - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Definition Language Detailed Topics

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1184-171K
Language
English (United States)

You cannot drop a hash index for a table while that table is subject to dynamic AMP sample emulation. To disable dynamic AMP sampling, contact the Teradata Support Center.

To use dynamic AMP sampling on the table from which you dropped the hash index, use the following general procedure:

  1. Drop the hash index from the table on the target system.
  2. Extract a fresh dynamic AMP sample from the target system.
  3. Apply the fresh sample to the source system.