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DBMS_SCHEDULER or DBMS_JOB And DST / Timezones Explained (Doc ID 467722.1)

Last updated on DECEMBER 18, 2023

Applies to:

Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Cloud Service - Version N/A and later
Oracle Database - Standard Edition - Version and later
Oracle Database - Enterprise Edition - Version and later
Oracle Database Cloud Schema Service - Version N/A and later
Information in this document applies to any platform.


This note gives an overview of how DBMS_SCHEDULER / DBMS_JOB reacts on Daylight Saving Time( DST ) transitions and what to know when using timezone information with jobs.


To be used when DBMS_SCHEDULER / DBMS_JOB jobs run at a wrong time after a DST change or you have output from jobs selecting from TIMESTAMP WITH LOCAL TIMEZONE columns that is not correct.
If things about timezones are not clear please have first a look at <Note 340512.1> Timestamps & time zones - Frequently Asked Questions.


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In this Document
 When running trough DBMS_SCHEDULER or DBMS_JOB a job output using TIMESTAMP WITH LOCAL TIMEZONE gives the wrong time.
 Job runtime time after DST has changed.
 When using DBMS_JOB:
 How to check the sysdate or systimestamp seen by jobs?

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