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https://issues.apache.org/jira/browse/DERBY-4582?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12861689#action_12861689
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Knut Anders Hatlen commented on DERBY-4582:
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All tests passed. Committed patch 5a with revision 938796.
> 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
> Fix For: 10.7.0.0
>
> Attachments: calendar.diff, derby-4582-1a-client-send.diff,
> derby-4582-2a-server-receive.diff, derby-4582-3a-server-send.diff,
> derby-4582-4a-client-receive.diff, derby-4582-5a-bugfix.diff, DerbyTest.java,
> junit.diff, junit.diff, upd-rs-test.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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