17.10 - Locking and Row Partitions - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - Database Utilities

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Configuration
Publication ID
B035-1102-171K
Language
English (United States)

To allow the Lock Manager to request locks at row-partition granularities, Vantage employs a value called a rowkey, which combines a row partition identifier (the internal partition number or IPN) with a rowhash value. The rowkey allows the Lock Manager to consider row partitions in determining the type of lock to use for a given transaction. The Lock Manage can thereby limit locks, when appropriate, to rows in a single row-partition, allowing concurrent access to the non-locked partitions of the table.

Partition-aware locks are identified in the output of Lock Display by having a PLLKind descriptor.