UPDATE Processing Time - Analytics Database - Teradata Vantage

SQL Data Manipulation Language

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
VMware
Product
Analytics Database
Teradata Vantage
Release Number
17.20
Published
June 2022
Language
English (United States)
Last Update
2024-04-05
dita:mapPath
pon1628111750298.ditamap
dita:ditavalPath
qkf1628213546010.ditaval
dita:id
esx1472246586715
lifecycle
latest
Product Category
Teradata Vantage™
Processing time for an UPDATE operation is longer under the following conditions:
  • When the FALLBACK option is specified for the table, because the rows in the secondary copy of the table must also be updated.
  • When a column on which one or more indexes (secondary or primary) are defined is updated.

You can shorten the processing time for an UPDATE operation by using an indexed column in the WHERE clause of the UPDATE request.

Processing time can also vary between different syntaxes used to perform the identical update operation. Use the EXPLAIN modifier to determine which syntax form produces optimal processing time.