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https://issues.apache.org/jira/browse/CASSANDRA-8879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14347456#comment-14347456
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Aleksey Yeschenko commented on CASSANDRA-8879:
----------------------------------------------
Given that we can only do it for three types at best (blob to ascii, blob to
utf8, blob to inet), I don't think making any exceptions, even if you
pinky-promise that the types truly match, and introducing special syntax, is
the right way to go. Agree with Sylvain here, except not fine with {{FORCE}}.
> Alter table on compact storage broken
> -------------------------------------
>
> Key: CASSANDRA-8879
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8879
> Project: Cassandra
> Issue Type: Bug
> Reporter: Nick Bailey
> Assignee: Tyler Hobbs
> Fix For: 2.0.13
>
> Attachments: 8879-2.0.txt
>
>
> In 2.0 HEAD, alter table on compact storage tables seems to be broken. With
> the following table definition, altering the column breaks cqlsh and
> generates a stack trace in the log.
> {noformat}
> CREATE TABLE settings (
> key blob,
> column1 blob,
> value blob,
> PRIMARY KEY ((key), column1)
> ) WITH COMPACT STORAGE
> {noformat}
> {noformat}
> cqlsh:OpsCenter> alter table settings ALTER column1 TYPE ascii ;
> TSocket read 0 bytes
> cqlsh:OpsCenter> DESC TABLE settings;
> {noformat}
> {noformat}
> ERROR [Thrift:7] 2015-02-26 17:20:24,640 CassandraDaemon.java (line 199)
> Exception in thread Thread[Thrift:7,5,main]
> java.lang.AssertionError
> >...at
> >org.apache.cassandra.cql3.statements.AlterTableStatement.announceMigration(AlterTableStatement.java:198)
> >...at
> >org.apache.cassandra.cql3.statements.SchemaAlteringStatement.execute(SchemaAlteringStatement.java:79)
> >...at
> >org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:158)
> >...at
> >org.apache.cassandra.cql3.QueryProcessor.process(QueryProcessor.java:175)
> >...at
> >org.apache.cassandra.thrift.CassandraServer.execute_cql3_query(CassandraServer.java:1958)
> >...at
> >org.apache.cassandra.thrift.Cassandra$Processor$execute_cql3_query.getResult(Cassandra.java:4486)
> >...at
> >org.apache.cassandra.thrift.Cassandra$Processor$execute_cql3_query.getResult(Cassandra.java:4470)
> >...at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
> >...at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
> >...at
> >org.apache.cassandra.thrift.CustomTThreadPoolServer$WorkerProcess.run(CustomTThreadPoolServer.java:204)
> >...at
> >java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> >...at
> >java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> >...at java.lang.Thread.run(Thread.java:724)
> {noformat}
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