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From "Aleksey Yeschenko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-14899) Cannot perform slice reads in reverse direction against tables with clustering columns in mixed order
Date Fri, 16 Nov 2018 12:21:00 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-14899?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16689343#comment-16689343
] 

Aleksey Yeschenko commented on CASSANDRA-14899:
-----------------------------------------------

Code [here|https://github.com/iamaleksey/cassandra/commits/14899-2.2], CI [here|https://circleci.com/workflow-run/b6db8bff-2aa2-49e7-8a8e-d01079c85872].

> Cannot perform slice reads in reverse direction against tables with clustering columns
in mixed order
> -----------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-14899
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14899
>             Project: Cassandra
>          Issue Type: Bug
>          Components: CQL
>            Reporter: Aleksey Yeschenko
>            Assignee: Aleksey Yeschenko
>            Priority: Major
>             Fix For: 2.2.x
>
>
> CASSANDRA-11196 accidentally broke reading from tables with mixed clustering column order
in the opposite direction.
> {{ReversedPrimaryKeyRestrictions::boundsAsComposites}} method attempts to reverse the
list returned from {{PrimaryKeyRestrictionSet::boundsAsComposites}} and fails, as Guava’s
{{Lists::transform}} method returns a {{List}} that doesn’t support {{set()}}.
> Reproduction:
> {code}
> CREATE TABLE test.test (
>     a int,
>     b int,
>     c int,
>     PRIMARY KEY (a, b, c)
> ) WITH CLUSTERING ORDER BY (b ASC, c DESC);
> SELECT * FROM test.test WHERE a = 0 AND (b, c) > (0, 0) ORDER BY b DESC, c ASC;
> > ServerError: java.lang.UnsupportedOperationException
> {code}
> {code}
> java.lang.UnsupportedOperationException: null
> 	at java.util.AbstractList.set(AbstractList.java:132) ~[na:1.8.0_181]
> 	at java.util.Collections.swap(Collections.java:497) ~[na:1.8.0_181]
> 	at java.util.Collections.reverse(Collections.java:378) ~[na:1.8.0_181]
> 	at org.apache.cassandra.cql3.restrictions.ReversedPrimaryKeyRestrictions.boundsAsComposites(ReversedPrimaryKeyRestrictions.java:63)
~[main/:na]
> 	at org.apache.cassandra.cql3.restrictions.StatementRestrictions.getClusteringColumnsBoundsAsComposites(StatementRestrictions.java:580)
~[main/:na]
> 	at org.apache.cassandra.cql3.statements.SelectStatement.makeFilter(SelectStatement.java:418)
~[main/:na]
> 	at org.apache.cassandra.cql3.statements.SelectStatement.getSliceCommands(SelectStatement.java:359)
~[main/:na]
> 	at org.apache.cassandra.cql3.statements.SelectStatement.getPageableCommand(SelectStatement.java:191)
~[main/:na]
> 	at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:172)
~[main/:na]
> {code}



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