Dynamic Row Partition Elimination | Optimizer Process | Teradata Vantage - 17.10 - Dynamic Row Partition Elimination - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - SQL Request and Transaction Processing

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
User Guide
Publication ID
B035-1142-171K
Language
English (United States)

Dynamic row partition elimination (DPE) is a form of partition elimination that occurs after data values in the tables are known in order to eliminate partitions: the database cannot determine the partitions to be eliminated until the plan is executed and the data is scanned. Because of this, dynamic partition elimination must be applied on the AMPs after query optimization has already taken place.

Several forms of dynamic row partition elimination exist such as DPE for merge, hash, or product joins, DPE that occurs with a rowkey-based merge join, and others. See Product Joins With Dynamic Row Partition Elimination and Product Join With Dynamic Row Partition Elimination for Character Partitioning for some applications of dynamic row partition elimination.