[jira] [Commented] (DRILL-3971) to_date(timestamp) is supported

["Kristine Hahn (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-3971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15002891#comment-15002891 ] 

Kristine Hahn commented on DRILL-3971:
--------------------------------------

This timestamp info was added a while ago. Please review: http://drill.apache.org/docs/data-type-conversion/#to_date

> to_date(timestamp) is supported 
> --------------------------------
>
>                 Key: DRILL-3971
>                 URL: https://issues.apache.org/jira/browse/DRILL-3971
>             Project: Apache Drill
>          Issue Type: Task
>          Components: Documentation
>            Reporter: Sean Hsuan-Yi Chu
>            Assignee: Kristine Hahn
>
> Do a search for "to_date" in this link:
> https://drill.apache.org/docs/data-type-conversion/
> We would find that it says these two are supported:
> 1. expression is a character string enclosed... (rest is omitted)
> 2. 'format' is a format specifier enclosed... (rest is omitted)
> Due to DRILL-3769, let's add one more supported case: expression can be timp_stamp type. 
> A example would be:
> {code}
> 0: jdbc:drill:zk=local> select to_date(to_timestamp(1000000000)) from (VALUES(1));
> +-------------+
> |   EXPR$0    |
> +-------------+
> | 2001-09-09  |
> +-------------+
> {code}
> Note that to_timestamp(1000000000) would generate a timestamp with value 2001-09-08 18:46:40.0 (on MAC, which can be different on Linux )



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