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From "Miklos Gergely (JIRA)" <>
Subject [jira] [Updated] (HIVE-21896) SHOW FUNCTIONS / SHOW FUNCTIONS LIKE - clarify
Date Fri, 21 Jun 2019 11:56:00 GMT


Miklos Gergely updated HIVE-21896:
    Status: Patch Available  (was: Open)

> ----------------------------------------------
>                 Key: HIVE-21896
>                 URL:
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>    Affects Versions: 3.1.1
>            Reporter: Miklos Gergely
>            Assignee: Miklos Gergely
>            Priority: Major
>             Fix For: 4.0.0
>         Attachments: HIVE-21896.01.patch
> According to [] the
currently available functions can be listed like this:
> {code:java}
> SHOW FUNCTIONS <pattern>;{code}
> If the user executes this command, they will get the correct list of functions, but
they will also see this on the standard output:
> {code:java}
> SHOW FUNCTIONS is deprecated, please use SHOW FUNCTIONS LIKE instead.{code}
> If the user uses the
> {code:java}
> SHOW FUNCTIONS LIKE <pattern>;{code}
> command then they will receive the exact same result (though through different codes).
The only difference is that one can get all the function names with "SHOW FUNCTIONS;", while
"SHOW FUNCTIONS LIKE;" returns an exception, so in this case the pattern is mandatory.
> So there should be a decision if we still accept "SHOW FUNCTIONS" without the "LIKE".
My suggestion is to accept it only if there is no pattern. so "SHOW FUNCTIONS;" is ok, without
deprecation message, but "SHOW FUNCTIONS <pattern>" should throw an exception.
> Whatever we decide, we should document it appropriately.
> cc [~krishahn]

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