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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-6895) Add STR_TO_DATE supported in SQL
Date Wed, 15 Aug 2018 09:17:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-6895?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16580873#comment-16580873
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ASF GitHub Bot commented on FLINK-6895:
---------------------------------------

buptljy commented on issue #6359: [FLINK-6895][table]Add STR_TO_DATE supported in SQL
URL: https://github.com/apache/flink/pull/6359#issuecomment-413141040
 
 
   @twalthr I add a literalValue in GeneratedExpression, because the case class cannot be
inherited. And the default value is None, so that it doesn't affect other functions.

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> Add STR_TO_DATE supported in SQL
> --------------------------------
>
>                 Key: FLINK-6895
>                 URL: https://issues.apache.org/jira/browse/FLINK-6895
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table API &amp; SQL
>    Affects Versions: 1.4.0
>            Reporter: sunjincheng
>            Assignee: buptljy
>            Priority: Major
>              Labels: pull-request-available
>
> STR_TO_DATE(str,format) This is the inverse of the DATE_FORMAT() function. It takes a
string str and a format string format. STR_TO_DATE() returns a DATETIME value if the format
string contains both date and time parts, or a DATE or TIME value if the string contains only
date or time parts. If the date, time, or datetime value extracted from str is illegal, STR_TO_DATE()
returns NULL and produces a warning.
> * Syntax:
> STR_TO_DATE(str,format) 
> * Arguments
> **str: -
> **format: -
> * Return Types
>   DATAETIME/DATE/TIME
> * Example:
>   STR_TO_DATE('01,5,2013','%d,%m,%Y') -> '2013-05-01'
>   SELECT STR_TO_DATE('a09:30:17','a%h:%i:%s') -> '09:30:17'
> * See more:
> ** [MySQL| https://dev.mysql.com/doc/refman/5.7/en/date-and-time-functions.html#function_str-to-date]



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