Knowledge Drop

How are Out-of-Date PDTs Managed?

  • 15 June 2021
  • 1 reply

Userlevel 5

Last tested: May 22, 2018

Persistent Derived Tables are automatically reaped by Looker based on the following rules:

If refresh is tied to a particular time (e.g. set via 'persist for'), then the PDT will be reaped from the database 1 hour after the persistence window expires.

PDTs in Dev-Mode are treated as persist-for 24 hours until they are pushed to Production.

If refresh is tied to a SQL Trigger Value, the PDT will continue to be built as long as it exists in a Production model. They will be reaped 1 hour after the associated Production model is deleted.

Datagroups behave based on the sql_trigger within them.


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1 reply

Hello, what does someone do when our PDTs get deleted overnight? And no one is responding.