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From "Giampaolo (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-11114) Document which type conversions are allowed
Date Mon, 16 May 2016 20:56:12 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-11114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15285274#comment-15285274
] 

Giampaolo commented on CASSANDRA-11114:
---------------------------------------

These are allowed conversions for clustering columns. 

||Data type may be altered to:||Data type||
|_ascii_, _text_, _varchar_|_blob_|
|_ascii_, varchar|text|
|_ascii_, text|varchar|

Respect to https://docs.datastax.com/en/cql/3.3/cql/cql_reference/cql_data_types_c.html, {{int}}
-> {{varint}} case is not present anymore.

> Document which type conversions are allowed
> -------------------------------------------
>
>                 Key: CASSANDRA-11114
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11114
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: CQL, Documentation and Website
>            Reporter: Sylvain Lebresne
>            Assignee: Giampaolo
>            Priority: Minor
>              Labels: doc-impacting, lhf
>         Attachments: cassandra-11114-trunk.patch
>
>
> We allow only some type conversion through {{ALTER TABLE}} and type casts, the ones that
don't break stuff, but we don't currently document which ones those are. We should add it
to http://cassandra.apache.org/doc/cql3/CQL-3.0.html.



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