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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4364) Column family pruning incorrectly prunes CFs referred to by filters
Date Fri, 09 Sep 2011 23:10:09 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4364?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13101632#comment-13101632
] 

Todd Lipcon commented on HBASE-4364:
------------------------------------

Actually, it turns out this isn't due to column family pruning - the same behavior occurs
even with just one column family:

{noformat}

create 't2', 'f'
put 't2', 'r1', 'f:e_word', 'hello'
put 't2', 'r1', 'f:f_word', 'bonjour'
put 't2', 'r2', 'f:e_word', 'goodbye'
put 't2', 'r2', 'f:f_word', 'au revoir'
scan 't2'
# scan selecting only one column - returns 2 distinct rows
scan 't2', { COLUMNS => ['f:e_word'] }
# scan with a predicate of the french word > 'b', returns 1 row
scan 't2', { FILTER => "SingleColumnValueFilter('f', 'f_word', >, 'binary:b')"  }
# scan with a predicate of the french word > 'b', selecting only the english word
scan 't2', { COLUMNS => ['f:e_word'], FILTER => "SingleColumnValueFilter('f', 'e_word',
>, 'binary:b')"  }
{noformat}

> Column family pruning incorrectly prunes CFs referred to by filters
> -------------------------------------------------------------------
>
>                 Key: HBASE-4364
>                 URL: https://issues.apache.org/jira/browse/HBASE-4364
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.90.4, 0.92.0
>            Reporter: Todd Lipcon
>            Priority: Critical
>
> For a scan, if you select some set of columns using addColumns(), and then apply a SingleColumnValueFilter
that restricts the results based on some other columns which aren't selected, and those non-selected
columns are part of a separate column family, then those filter conditions are ignored.

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