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From: "Robert Stupp (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (CASSANDRA-7744) Dropping the last collection
 column turns CompoundSparseCellNameType$WithCollection into
 CompoundDenseCellNameType
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    [ https://issues.apache.org/jira/browse/CASSANDRA-7744?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14095242#comment-14095242 ] 

Robert Stupp commented on CASSANDRA-7744:
-----------------------------------------

[~iamaleksey] thanks for the explanation. IMO since it seems that it never worked before, I'd prefer the first option (reject such updates).

> Dropping the last collection column turns CompoundSparseCellNameType$WithCollection into CompoundDenseCellNameType
> ------------------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-7744
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7744
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Aleksey Yeschenko
>            Assignee: Sylvain Lebresne
>             Fix For: 2.0.10, 2.1.0
>
>         Attachments: 7744.txt
>
>
> Dropping the last collection column turns CompoundSparseCellNameType$WithCollection into CompoundDenseCellNameType
> To reproduce
> {code}
> cqlsh:test> create table test (id int primary key, col map<int,int>);
> cqlsh:test> alter table test drop col;
> cqlsh:test> alter table test add col list<int>;
> code=2200 [Invalid query] message="Cannot add new column to a COMPACT STORAGE table"
> {code}



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