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From "James Taylor (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-1160) Allow an index to be declared as immutable
Date Thu, 15 Feb 2018 20:46:00 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-1160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16366238#comment-16366238
] 

James Taylor commented on PHOENIX-1160:
---------------------------------------

We should also fix PHOENIX-4612 by just disallowing the immutability of a table to change.
Otherwise, we wouldn't know if an index was declared as immutable or if its data table was
declared as immutable.

> Allow an index to be declared as immutable
> ------------------------------------------
>
>                 Key: PHOENIX-1160
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-1160
>             Project: Phoenix
>          Issue Type: Improvement
>            Reporter: James Taylor
>            Priority: Major
>
> Currently, a table must be marked as immutable, through the IMMUTABLE_ROWS=true property
specified at creation time. In this case, all indexes added to the table are immutable, while
without this property, all indexes are mutable.
> Instead, we should support a mix of immutable and mutable indexes. We already have an
INDEX_TYPE field on our metadata row. We can add a new IMMUTABLE keyword and specify an index
is immutable like this:
> {code}
> CREATE IMMUTABLE INDEX foo ON bar(c2, c1);
> {code}
> It would be up to the application developer to ensure that only columns that don't mutate
are part of an immutable index (we already rely on this anyway).



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