16.10 - Locking and Row Partitions - Teradata Database

Teradata Database Utilities

Product
Teradata Database
Release Number
16.10
Published
June 2017
Language
English (United States)
Last Update
2018-04-26
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To allow the Lock Manager to request locks at row-partition granularities, Teradata Database 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.