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Status Future consideration
Workspace IBM i
Categories Db2 for i
Created by Guest
Created on Jun 30, 2023

In SQL JSON_TABLE, add an option on timestamp columns to take into account or not the timezone offset

In the SQL function JSON_TABLE, when a timestamp value indicated with a time zone offset (e.g.: "yyyy-mm-ddThh:mm:ss.nnnnnn<+/-Offset>") is retrieved to produce a timestamp column, the resulting value is always an UTC value (by adding or subtracting the indicated time zone offset), not a local value (without taking the offset into account).

However, it's often the case that you don't want to transform the local value of a timestamp into a UTC value. For example, web services implemented in LWI automatically convert the value of a timestamp parameter into a value with the time zone offset. So if you expose a web service in LWI and consume it in a SQLRPGLE, the value retrieved will be different from the one in the database if you're not in the UTC time zone.

As with other databases, it would be interesting to have an option on the timestamp column to indicate whether the time zone offset should be taken into account or not:

select * from json_table('{"root" : {"ts1" : "2023-05-31T12:21:57.123456+02:00"}}', 'lax $.root[*]' columns(ts1 timestamp TIMEZONE|NOTIMEZONE PATH 'lax $.ts1'));

Another solution would be to have another type of timestamp column to indicate whether the resulting timestamp should be produced taking into account the time zone offset or not:

select * from json_table('{"root" : {"ts1" : "2023-05-31T12:21:57.123456+02:00"}}', 'lax $.root[*]' columns(ts1 timestamp|timestamp_notimezone PATH 'lax $.ts1'));

Idea priority Medium
  • Guest
    Reply
    |
    Oct 18, 2023

    The CEAC has reviewed this requirement and recommends that IBM view this as a MEDIUM priority requirement that is important to address.

    Background: The COMMON Europe Advisory Council (CEAC) members have a broad range of experience in working with small and medium-sized IBM i customers. CEAC has a crucial role in working with IBM i development to help assess the value and impact of individual RFEs on the broader IBM i community and has therefore reviewed your RFE.

    To find out how CEAC help to shape the future of IBM i, see CEAC @ ibm.biz/BdYSYj and the article "The Five Hottest IBM i RFEs Of The Quarter" at ibm.biz/BdYSZT

    Sabine Jordan + Sara Andres – CEAC Program Manager, IBM

  • Guest
    Reply
    |
    Jul 24, 2023
    IBM will use this Idea as input to planning, but no commitment is made or implied. This Idea will be updated in the future if IBM implements it.

    Is your request to ignore the timezone offset completely? Or something else. There are several interpretations of what this timezone portion might mean.

    Db2 for i development
    IBM Power Systems Development
    1 reply