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https://issues.apache.org/jira/browse/HIVE-5192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13755264#comment-13755264
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Jason Dere commented on HIVE-5192:
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There's actually some differences in what arguments are allowed by the two
functions, so merging concat() and concat_ws() would mean the following changes
in behavior for each function:
concat() would allow lists of primitive types as arguments; each item of each
list would be concatenated to the result string.
concat_ws() would allow non-string types as arguments, so concat_ws('|', 1, 2)
would be valid.
> concat()/concat_ws() can use common implementation
> --------------------------------------------------
>
> Key: HIVE-5192
> URL: https://issues.apache.org/jira/browse/HIVE-5192
> Project: Hive
> Issue Type: Improvement
> Reporter: Jason Dere
>
> One of the review comments from HIVE-4844 mentioned that concat/concat_ws can
> probably share a common implementation.
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