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From "Jianing hu (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CASSANDRA-1591) get_range_slices always returns super columns that's been removed/restored, regardless of count value in slicerange
Date Thu, 07 Oct 2010 00:12:31 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-1591?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jianing hu updated CASSANDRA-1591:
----------------------------------

    Attachment: test.pl

> get_range_slices always returns super columns that's been removed/restored, regardless
of count value in slicerange
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-1591
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1591
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 0.6.4
>         Environment: CentOS 5.4, single Cassandra node 
>            Reporter: Jianing hu
>         Attachments: test.pl
>
>
> I'm seeing cases where the count in slicerange predicate is not respected. This is only
happening for super columns. I'm running Cassandra 0.6.4 in a single node.
> Steps to reproduce, using the Keyspace1.Super1 CF:
> * insert three super columns, bar1 bar 2, and bar3, under the same key
> * delete bar1
> * insert bar1 again
> * run a get_range_slices on Super1, with start=bar1, finish=bar3, and count=1
> * I expected only bar1 to be returned, but both both bar1 and bar2 are returned. bar3
isn't, though. so count is somewhat respected.
> perl code to reproduce follows:
> #!/usr/bin/perl
> use strict;
> use Data::Dumper;
> use Net::Cassandra;
> my $key = 10;
> my $cs = new Net::Cassandra( hostname => 'localhost' )->client;
> my $ts = time;
> $cs->batch_mutate(
>     'Keyspace1',
>     {
>         $key => {
>             Super1 => [
>                 new Net::Cassandra::Backend::Mutation({
>                     column_or_supercolumn => new Net::Cassandra::Backend::ColumnOrSuperColumn({
>                         super_column => new Net::Cassandra::Backend::SuperColumn({
>                             name => 'bar1',
>                             columns => [
>                                 new Net::Cassandra::Backend::Column({
>                                     name => 'foo1',
>                                     value => 'foo1',
>                                     timestamp => $ts++
>                                 })
>                             ]
>                         })
>                     })
>                 }),
>                 new Net::Cassandra::Backend::Mutation({
>                     column_or_supercolumn => new Net::Cassandra::Backend::ColumnOrSuperColumn({
>                         super_column => new Net::Cassandra::Backend::SuperColumn({
>                             name => 'bar2',
>                             columns => [
>                                 new Net::Cassandra::Backend::Column({
>                                     name => 'foo1',
>                                     value => 'foo1',
>                                     timestamp => $ts++
>                                 })
>                             ]
>                         })
>                     })
>                 }),
>                 new Net::Cassandra::Backend::Mutation({
>                     column_or_supercolumn => new Net::Cassandra::Backend::ColumnOrSuperColumn({
>                         super_column => new Net::Cassandra::Backend::SuperColumn({
>                             name => 'bar3',
>                             columns => [
>                                 new Net::Cassandra::Backend::Column({
>                                     name => 'foo1',
>                                     value => 'foo1',
>                                     timestamp => $ts++
>                                 })
>                             ]
>                         })
>                     })
>                 })
>             ]
>         }
>     },
>     Net::Cassandra::Backend::ConsistencyLevel::ONE
>   );
> warn 'with fresh data';
> # expect bar1
> warn Dumper $cs->get_range_slices(
>     'Keyspace1',
>     new Net::Cassandra::Backend::ColumnParent({
>         column_family => 'Super1',
>     }),
>     new Net::Cassandra::Backend::SlicePredicate({
>         slice_range => new Net::Cassandra::Backend::SliceRange({
>             start => 'bar1',
>             finish => 'bar3',
>             count => 1
>         })
>     }),
>     new Net::Cassandra::Backend::KeyRange({
>         start_key => $key,
>         end_key => $key,
>         count => 1
>     }),
>     Net::Cassandra::Backend::ConsistencyLevel::ONE
>   );
> $cs->remove(
>     'Keyspace1',
>     $key,
>     new Net::Cassandra::Backend::ColumnPath({
>         column_family => 'Super1',
>         super_column => 'bar1'
>     }),
>     $ts++,
>     Net::Cassandra::Backend::ConsistencyLevel::ONE
>   );
> 'warn after delete';
> # expect bar2
> warn Dumper $cs->get_range_slices(
>     'Keyspace1',
>     new Net::Cassandra::Backend::ColumnParent({
>         column_family => 'Super1',
>     }),
>     new Net::Cassandra::Backend::SlicePredicate({
>         slice_range => new Net::Cassandra::Backend::SliceRange({
>             start => 'bar1',
>             finish => 'bar3',
>             count => 1
>         })
>     }),
>     new Net::Cassandra::Backend::KeyRange({
>         start_key => $key,
>         end_key => $key,
>         count => 1
>     }),
>     Net::Cassandra::Backend::ConsistencyLevel::ONE
>   );
> $cs->batch_mutate(
>     'Keyspace1',
>     {
>         $key => {
>             Super1 => [
>                 new Net::Cassandra::Backend::Mutation({
>                     column_or_supercolumn => new Net::Cassandra::Backend::ColumnOrSuperColumn({
>                         super_column => new Net::Cassandra::Backend::SuperColumn({
>                             name => 'bar1',
>                             columns => [
>                                 new Net::Cassandra::Backend::Column({
>                                     name => 'foo1',
>                                     value => 'foo1',
>                                     timestamp => $ts++
>                                 })
>                             ]
>                         })
>                     })
>                 }),
>             ]
>         }
>     },
>     Net::Cassandra::Backend::ConsistencyLevel::ONE
>   );
> warn 'after restore data';
> # expect bar1, but get both bar1 and bar2, not bar3, though. so count is somewhat respected.
> warn Dumper $cs->get_range_slices(
>     'Keyspace1',
>     new Net::Cassandra::Backend::ColumnParent({
>         column_family => 'Super1',
>     }),
>     new Net::Cassandra::Backend::SlicePredicate({
>         slice_range => new Net::Cassandra::Backend::SliceRange({
>             start => 'bar1',
>             finish => 'bar3',
>             count => 1
>         })
>     }),
>     new Net::Cassandra::Backend::KeyRange({
>         start_key => $key,
>         end_key => $key,
>         count => 1
>     }),
>     Net::Cassandra::Backend::ConsistencyLevel::ONE
>   );

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