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https://issues.apache.org/jira/browse/DERBY-4582?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Knut Anders Hatlen updated DERBY-4582:
--------------------------------------

    Attachment: junit.diff

Attaching an updated patch for the JUnit test case. In the new patch, we also 
test that we get the expected results when setTimestamp() is used to set a DATE 
or TIME parameter, and when getDate() or getTime() is used to fetch a TIMESTAMP 
column. The test still runs cleanly with the embedded driver and fails with the 
client driver.

I have committed the updated test case to trunk with revision 932930, but it's 
not yet enabled in any test suite.

> Timestamps inserted with GMT calendar are 1 hour later when subsequently read 
> with GMT calendar (Server Mode Only).
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-4582
>                 URL: https://issues.apache.org/jira/browse/DERBY-4582
>             Project: Derby
>          Issue Type: Bug
>          Components: Network Client
>    Affects Versions: 10.5.3.0
>         Environment: Windows XP Professional Version 2002 Service Pack 3,  
> Central Standard Time Zone (America/Chicago)
>            Reporter: Keith Kruse
>            Assignee: Knut Anders Hatlen
>         Attachments: calendar.diff, DerbyTest.java, junit.diff, junit.diff
>
>
> This issue only appears to happen in Network Server/Client mode.  Embedded 
> mode does not have the issue.
> My timezone is American/Chicago.  Saving timestamps with values for the 6 
> hours prior to DST start are being read back in as values 1 hour later than 
> written.  (I believe the issue happens on the write because values written in 
> Network Server/Client mode and read in Embedded mode are incorrect, while 
> values written and read in Embedded mode are corect.)
> Values between 3/13/2010 - 20:00 CST and 3/14/2010 - 02:00 CST will return 
> timstamps 1 hour off.  The "setTimestamp" method is being passed a GMT 
> calendar with the timestamp:
> I have a complete test class I can attach, but here is a summary:
> private final TimeZone gmtTZ = TimeZone.getTimeZone("GMT");
> private final Calendar gmtCal = Calendar.getInstance(gmtTZ);
> ...
> String sql = "INSERT INTO app.dst_test (id, gmt_timestamp, milli_time) 
> VALUES(?,?,?)";
> String sql2 = "SELECT * from app.dst_test where id=?";
> ...
> ps.setTimestamp(2, ts, gmtCal);
> ...
> Timestamp tsRead = rs.getTimestamp("gmt_timestamp", gmtCal);
> ...

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