[jira] [Resolved] (TAJO-956) CONCAT should be support multiple params and null param.

["Hyunsik Choi (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TAJO-956?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyunsik Choi resolved TAJO-956.
-------------------------------

       Resolution: Fixed
    Fix Version/s: 0.9.0

committed.

> CONCAT should be support multiple params and null param.
> --------------------------------------------------------
>
>                 Key: TAJO-956
>                 URL: https://issues.apache.org/jira/browse/TAJO-956
>             Project: Tajo
>          Issue Type: Improvement
>            Reporter: Hyoungjun Kim
>            Assignee: Hyoungjun Kim
>            Priority: Trivial
>             Fix For: 0.9.0
>
>
> Currently Tajo's CONCAT function doesn't support multiple parameters and null parameter.
> {noformat}
> default> select concat('aaa', 'bbb', 'ccc');
> ERROR: function concat(text,text,text) does not exist
> default>
> {noformat}
> CONCAT function can be defined as follows.
> {noformat}
> default> select concat(null, 'aaa', null, 'bbb', 'ccc');
>  concat
> --------
>  aaabbbccc
> {noformat}



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