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Date: Wed, 31 Aug 2016 10:11:20 +0000 (UTC)
From: "Serge Harnyk (JIRA)" <jira@apache.org>
To: issues@drill.apache.org
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Subject: [jira] [Updated] (DRILL-4864) Add ANSI format for date/time
 functions
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archived-at: Wed, 31 Aug 2016 10:11:22 -0000


     [ https://issues.apache.org/jira/browse/DRILL-4864?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Serge Harnyk updated DRILL-4864:
--------------------------------
    Description: 
The TO_DATE() is exposing the Joda string formatting conventions into the SQL layer. This is not following SQL conventions used by ANSI and many other database engines on the market.

Add new UDF "ansi_to_joda(string1, string2)", that takes string that represents ANSI datetime format and returns string that represents equal Joda format.
Add new session option "drill.exec.fn.to_date_format" that can be one of two values - "JODA"(default) and "ANSI".
If option is set to "JODA" queries with to_date() function would work in usual way.
If option is set to "ANSI" second argument would be wrapped with ansi_to_joda() function, that allows user to use ANSI datetime format
Wrapping is used in to_date(), to_time() and to_timestamp() functions.


  was:
The TO_DATE() is exposing the Joda string formatting conventions into the SQL layer. This is not following SQL conventions used by ANSI and many other database engines on the market.

Add new UDF "ansi_to_joda(string1, string2)", that takes string that represents ANSI datetime format and returns string that represents equal Joda format.
Add new session option "drill.exec.fn.to_date_format" that can be one of two values - "JODA"(default) and "ANSI".
If option is set to "JODA" queries with to_date() function would work in usual way.
If option is set to "ANSI" second argument would be wrapped with ansi_to_joda() function, that allows user to use ANSI datetime format
Wrapping is used in to_date(), to_time() and to_timestamp() functions.


> Add ANSI format for date/time functions
> ---------------------------------------
>
>                 Key: DRILL-4864
>                 URL: https://issues.apache.org/jira/browse/DRILL-4864
>             Project: Apache Drill
>          Issue Type: Improvement
>    Affects Versions: 1.8.0
>            Reporter: Serge Harnyk
>            Assignee: Serge Harnyk
>             Fix For: 1.9.0
>
>         Attachments: jodatime_ansi.odt
>
>
> The TO_DATE() is exposing the Joda string formatting conventions into the SQL layer. This is not following SQL conventions used by ANSI and many other database engines on the market.
> Add new UDF "ansi_to_joda(string1, string2)", that takes string that represents ANSI datetime format and returns string that represents equal Joda format.
> Add new session option "drill.exec.fn.to_date_format" that can be one of two values - "JODA"(default) and "ANSI".
> If option is set to "JODA" queries with to_date() function would work in usual way.
> If option is set to "ANSI" second argument would be wrapped with ansi_to_joda() function, that allows user to use ANSI datetime format
> Wrapping is used in to_date(), to_time() and to_timestamp() functions.


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