Checkpointing and Restarting - Parallel Transporter

Teradata® Parallel Transporter Reference

Product
Parallel Transporter
Release Number
17.10
Published
February 2022
Language
English (United States)
Last Update
2023-11-29
dita:mapPath
abr1608578396711.ditamap
dita:ditavalPath
obe1474387269547.ditaval
dita:id
ogv1478610452101
Product Category
Teradata Tools and Utilities

Because SQL statements are sent to the database by group in the order in which they are specified in the Teradata PT APPLY statement, the DDL operator can take a checkpoint after each group is executed. A group can contain one or more SQL statements. A checkpoint, with respect to the DDL operator, marks the last group of DDL/DML SQL statements to execute successfully.

The DDL operator restarts at the beginning of the group of SQL statements whose execution is interrupted by an abnormal termination. If the interrupted group has only one SQL statement, the DDL operator restarts at that statement.

If the last request was successful prior to a restart, the operator can resume at the next request in line. If the last request failed prior to a restart, then the operator resumes at the failed request.