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Status Future consideration
Workspace IBM i
Categories Db2 for i
Created by Guest
Created on Feb 12, 2021

RELATED IDEAS

Implement TO_UTC_TIMESTAMP in Db2 for i

Other IBM database products have a method TO_UTC_TIMESTAMP that can be used to convert a timestamp from the local time zone to UTC, with awareness of the DST rules in effect on the date in question.

Example Knowledge Center page from IBM Big SQL 5.0.0:
https://www.ibm.com/support/knowledgecenter/SSCRJT_5.0.0/com.ibm.swg.im.infosphere.biginsights.commsql.doc/doc/r0061917.html


Use Case:

We store data on our i7.3 server that we use with tools requiring the data in Unix Epoch format. We can convert the timestamp to Unix Epoch using EXTRACT( EPOCH FROM timestamp) but that doesn't adjust for time zones. We would like to be able to use EXTRACT( EPOCH FROM TO_UTC_TIMESTAMP( timestamp, 'America/Detroit' )) to process this all in SQL instead of having to look up and adjust for the time zone externally.


Idea priority Low
  • Guest
    Reply
    |     May 22, 2023

    nice to have.

    At the moment one have to create a custom user defined SQL function using the system QWCCVTDT API.

    QWCCVTDT is complete, but a bit verbose.

    A native SQL way should be nice to have.

    Additionally, there should exists a way to have native zone aware timestamp values in business logic like RPG

    %timestamp(*UTC) returns current utc time

    %timestamp(*ZONE 'CET') return central european timestamp

    %timestamp(mytimestamp, *UTC, *ZONE 'CET') convert mytimestamp between zones (i.e. using the API under the hood).

    The above a is a step forward, for the long term ideally one should have a native timestamp type that carries also timezone information, to ease arithmetics between different sources.

    thanks



  • Guest
    Reply
    |     Mar 31, 2021

    IBM will use this request as input to planning but no commitment is made or implied. This request will be updated in the future if IBM implements it.

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