15.00 - Parent and Child Sessions - Teradata Database

Teradata Database Utilities

Product
Teradata Database
Release Number
15.00
Content Type
Configuration
Publication ID
B035-1102-015K
Language
English (United States)
Last Update
2018-09-25

Parent and Child Sessions

When a connected session is part of either a FastLoad, MultiLoad, FastExport, or Archive and Recovery operation, that session establishes subordinate sessions to accomplish the task more quickly. The originating session is then called a Parent session; the subordinate sessions are called Child sessions that belong to that Parent.

A Child session is not recognized as such, and its activity is not reported until it has transmitted at least one request to the AMPs in the current transaction.

Information about the activity of Child sessions is available to Query Session when the Parent session is in the Active state or when one of several inactive states described later in this chapter.

In FastLoad operations, Child sessions exist and are reported only while the Parent session is in the loading phase. In MultiLoad operations, Child sessions exist and are reported only while the Parent session is in the acquisition phase. Query Session reports the status of Child sessions when you request detail information.