[jira] [Updated] (CASSANDRA-12443) Remove alter type support

["Carl Yeksigian (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-12443?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Carl Yeksigian updated CASSANDRA-12443:
---------------------------------------
    Status: Open  (was: Patch Available)

Going to cancel this patch since there are some errors after a cleaner test run, and I want to look to ensure they aren't related to this.

> Remove alter type support
> -------------------------
>
>                 Key: CASSANDRA-12443
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12443
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Carl Yeksigian
>            Assignee: Carl Yeksigian
>             Fix For: 3.0.x
>
>
> Currently, we allow altering of types. However, because we no longer store the length for all types anymore, switching from a fixed-width to variable-width type causes issues. commitlog playback breaking startup, queries currently in flight getting back bad results, and special casing required to handle the changes. In addition, this would solve CASSANDRA-10309, as there is no possibility of the types changing while an SSTableReader is open.
> For fixed-length, compatible types, the alter also doesn't add much over a cast, so users could use that in order to retrieve the altered type.



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