15.10 - Dynamic Row Partition Elimination - Teradata Database

Teradata Database SQL Request and Transaction Processing

Teradata Database
Programming Reference
User Guide

Dynamic row partition elimination (DPE) is a form of partition elimination that cannot occur until data values in the tables are known in order to eliminate partitions: Teradata 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 or product join, DPE that occurs with a rowkey-based merge join, and others. See “Product Joins With Dynamic Row Partition Elimination” on page 400 and “Product Join With Dynamic Row Partition Elimination for Character Partitioning” on page 403 for some applications of dynamic row partition elimination.