[jira] [Commented] (KUDU-982) nullable columns should support DEFAULT NULL

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

    [ https://issues.apache.org/jira/browse/KUDU-982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15306180#comment-15306180 ] 

Will Berkeley commented on KUDU-982:
------------------------------------

[~tlipcon]: Took a look at this one because it seemed like fruit hanging low enough for me to reach. This functionality already exists, because creating a nullable column means that the column does not have to be specified in an insert as it will auto-null. Clearing the default on a nullable column will restore this behavior.

A column can't be made nullable after table creation, so a column can't be made default null if it was created as non-nullable. That seems ok, especially because it's a bigger task to allow a non-nullable column to become nullable.

So maybe this can just be resolved? I think the current behavior is what most users would expect.

> nullable columns should support DEFAULT NULL
> --------------------------------------------
>
>                 Key: KUDU-982
>                 URL: https://issues.apache.org/jira/browse/KUDU-982
>             Project: Kudu
>          Issue Type: Improvement
>          Components: api, client, master
>    Affects Versions: Private Beta
>            Reporter: Todd Lipcon
>
> I don't think we have APIs which work for setting the default to NULL in Alter/Create.



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