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Posted to derby-dev@db.apache.org by "Larry Melvin Lemons (Jira)" <ji...@apache.org> on 2020/12/01 00:12:00 UTC
[jira] [Comment Edited] (DERBY-7091) Times Inserted Incorrectly
Around Daylight Savings Time Change in Spring
[ https://issues.apache.org/jira/browse/DERBY-7091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17241150#comment-17241150 ]
Larry Melvin Lemons edited comment on DERBY-7091 at 12/1/20, 12:11 AM:
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Well I found a work around. Shut down the database. Set the timezone on the computer to UTC time. Start up the database. Do the inserts. Shutting down the database and setting the server time back to the local timezone and querying the database will show the correct times. However, if you insert any more, then the times will be off again, until the database is shut back down and the server time is reset back to UTC time.
I shouldn't need to do that, but at least there is a work around.
was (Author: llemons):
Well I found a work around. Shut down the database. Set the timezone on the computer to UTC time. Start up the database. Do the inserts. Shutting down the database and setting the server time back to the local timezone and querying the database will show the correct times. However, if you insert any more, then the times will be off again, until the database is shut back down and the server time is reset back to UTC time.
> Times Inserted Incorrectly Around Daylight Savings Time Change in Spring
> ------------------------------------------------------------------------
>
> Key: DERBY-7091
> URL: https://issues.apache.org/jira/browse/DERBY-7091
> Project: Derby
> Issue Type: Bug
> Affects Versions: 10.14.2.0
> Environment: Java 14.0.1
> Reporter: Larry Melvin Lemons
> Priority: Critical
> Attachments: Test.java, Timezone_Data_Inconsistencies.odt
>
>
> When inserting date/times into the timestamp field around the daylight savings time change in the Spring, the times are inconsistent. I am in/use the New York EST/EDT timezone, but the data I am inserting is Standard time and not Daylight Savings Time
> All the times are correct up to 1:48AM, then when it inserts 2:00 AM the data in the database is 3:00AM. That could be alright if it kept switching the time to Daylight Savings Time, however going from inserting 2:48AM and getting 3:48AM in the database, when it inserts 3:00AM it shows 3:00AM in the database, not the expected 4:00AM. Then in the fall whatever is inserted in the database is what shows in the database around the daylight savings time switch to standard time. See the attached Open Document Text file for examples of what is actually inserted and what is showing in the database.
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