[jira] [Commented] (KUDU-981) Validate table and column names

["Will Berkeley (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KUDU-981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15277089#comment-15277089 ] 

Will Berkeley commented on KUDU-981:
------------------------------------

I'd like to work on this. I have a small patch with rules based on the [Impala identifiers rules|http://www.cloudera.com/documentation/enterprise/latest/topics/impala_identifiers.html]. Specifically I (hope) it enforces the rules

- The minimum length of a table name is 1 character.
- The maximum length of a table name is 128 characters.
- An identifier must start with an alphabetic character. The remainder can contain any combination of alphanumeric characters and underscores.
- An identifier can contain only ASCII characters.

It doesn't enforce case-insensitivity.

If you think it's worth it, I'll push it to Gerrit and it can be a basis for discussion and improvement.

Not going to lie though, I'll miss dangerous, dangerous freedom:

!naming-freedom.png!

> Validate table and column names
> -------------------------------
>
>                 Key: KUDU-981
>                 URL: https://issues.apache.org/jira/browse/KUDU-981
>             Project: Kudu
>          Issue Type: Bug
>          Components: master
>    Affects Versions: Private Beta
>            Reporter: Todd Lipcon
>            Priority: Critical
>         Attachments: naming-freedom.png
>
>
> Currently I believe we allow table names such as "", " ", etc. We should probably figure out a reasonable subset of characters and validate names.



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