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From "Daniel John Debrunner (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-2235) Server doesnt support timestamps with timezone
Date Mon, 17 Sep 2007 19:12:43 GMT

    [ https://issues.apache.org/jira/browse/DERBY-2235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12528119
] 

Daniel John Debrunner commented on DERBY-2235:
----------------------------------------------

If one took the string ''2007-01-03 04:13:43.006 -0800'  as equivalent to a TIMESTAMP WITH
TIME ZONE value then following the SQL Standard (section 4.6.2) then a conversion to a TIMESTAMP
WITHOUT TIME ZONE (which is what Derby supports) will always result in:

   2007-01-03 04:13:43.006

regardless of any server time zone.

TIMESTAMP WITH TIME ZONE  ->> TIMESTAMP WITHOUT TIME ZONE = SV.UTC + SV.TZ

   SV is the value to be converted, in this case the string which is broken into two logical
parts:

      SV.UTC = 2007-01-03 12:13:43.006    (universal time)
      SV.TZ = -0800  (offset from universal time)

SV.UTC + SV.TZ = 2007-01-03 04:13:43.006

> Server doesnt support timestamps with timezone
> ----------------------------------------------
>
>                 Key: DERBY-2235
>                 URL: https://issues.apache.org/jira/browse/DERBY-2235
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 10.2.2.0
>            Reporter: Ken Johanson
>            Priority: Minor
>
> DML with datetime literals having timzone offset data (ISO-8601):
> update tbl set dt1 = '2007-01-03 04:13:43.006 -0800'
> Causes:
> SQLException: The syntax of the string representation of a datetime value is incorrect.
> Error: -1 SQLSTATE: 22007
> I believe that even if the storage does not (does it?) support timezone storage, the
input of a TZ could be normalized (offset applied) to the default TZ.

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