[jira] [Commented] (HIVE-2231) Column aliases

["John Sichi (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-2231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13052751#comment-13052751 ] 

John Sichi commented on HIVE-2231:
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Since views are already a standard way of addressing this, wouldn't it be better to put effort into fixing any limitations there?


> Column aliases
> --------------
>
>                 Key: HIVE-2231
>                 URL: https://issues.apache.org/jira/browse/HIVE-2231
>             Project: Hive
>          Issue Type: Wish
>          Components: Query Processor
>            Reporter: Adam Kramer
>            Priority: Trivial
>
> It would be nice in several cases to be able to alias column names.
> Say someone in your company CREATEd a TABLE called important_but_named_poorly (alvin BIGINT, theodore BIGINT, simon STRING) PARTITIONED BY (dave STRING), that indexes the relationship between an actor (alvin), a target (theodore), and the interaction between them (simon), partitioned based on the date string (dave). Renaming the columns would break a million pipelines that are important but ownerless.
> It would be awesome to define an aliasing system as such:
> ALTER TABLE important_but_named_poorly REPLACE COLUMNS (actor BIGINT AKA alvin, target BIGINT AKA theodore, ixn STRING AKA simon) PARTITIONED BY (ds STRING AKA dave);
> ...which would mean that any user could, e.g., use the term "dave" to refer to ds if they really wanted to.

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