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Posted to issues@flink.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2019/11/15 06:09:00 UTC
[jira] [Updated] (FLINK-11935) Remove DateTimeUtils pull-in and fix
datetime casting problem
[ https://issues.apache.org/jira/browse/FLINK-11935?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated FLINK-11935:
-----------------------------------
Labels: pull-request-available (was: )
> Remove DateTimeUtils pull-in and fix datetime casting problem
> -------------------------------------------------------------
>
> Key: FLINK-11935
> URL: https://issues.apache.org/jira/browse/FLINK-11935
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / API
> Reporter: Rong Rong
> Assignee: Zhenghua Gao
> Priority: Major
> Labels: pull-request-available
>
> This {{DateTimeUtils}} was pulled in in FLINK-7235.
> Originally the time operation was not correctly done via the {{ymdToJulian}} function before the date {{1970-01-01}} thus we need the fix. similar to addressing this problem:
> {code:java}
> Optimized :1017-12-05 22:58:58.998
> Expected :1017-11-29 22:58:58.998
> Actual :1017-12-05 22:58:58.998
> {code}
>
> However, after pulling in avatica 1.13, I found out that the optimized plans of the time operations are actually correct. it is in fact the casting part that creates problem:
> For example, the following:
> *{{(plus(-12000.months, cast('2017-11-29 22:58:58.998', TIMESTAMP))}}*
> result in a StringTestExpression of:
> *{{CAST(1017-11-29 22:58:58.998):VARCHAR(65536) CHARACTER SET "UTF-16LE" COLLATE "ISO-8859-1$en_US$primary" NOT NULL}}*
> but the testing results are:
> {code:java}
> Optimized :1017-11-29 22:58:58.998
> Expected :1017-11-29 22:58:58.998
> Actual :1017-11-23 22:58:58.998
> {code}
>
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