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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-7337) SingleColumnValueFilter seems to get unavailble data
Date Tue, 26 Feb 2013 04:30:15 GMT

     [ https://issues.apache.org/jira/browse/HBASE-7337?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lars Hofhansl resolved HBASE-7337.
----------------------------------

    Resolution: Won't Fix

Closing as "Won't fix".
Please reopen if you do not think that is the right way to handle this.
                
> SingleColumnValueFilter seems to get unavailble data
> ----------------------------------------------------
>
>                 Key: HBASE-7337
>                 URL: https://issues.apache.org/jira/browse/HBASE-7337
>             Project: HBase
>          Issue Type: Bug
>          Components: Filters
>    Affects Versions: 0.94.3, 0.96.0
>         Environment: 0.94
>            Reporter: Zhou wenjian
>            Assignee: Zhou wenjian
>             Fix For: 0.96.0, 0.94.6
>
>
> put multi versions of a row.
> r1 cf:q  version:1 value:1
> r1 cf:q  version:2 value:3
> r1 cf:q  version:3 value:2
> the filter in scan is set as below:
> SingleColumnValueFilter valueF = new SingleColumnValueFilter(
>         family,qualifier,CompareOp.EQUAL,new BinaryComparator(Bytes
> .toBytes("2")));
> then i found all of the three versions will be emmitted, then i set latestVersionOnly
to false, the result does no change.
> {code}
>   public ReturnCode filterKeyValue(KeyValue keyValue) {
>     // System.out.println("REMOVE KEY=" + keyValue.toString() + ", value=" + Bytes.toString(keyValue.getValue()));
>     if (this.matchedColumn) {
>       // We already found and matched the single column, all keys now pass
>       return ReturnCode.INCLUDE;
>     } else if (this.latestVersionOnly && this.foundColumn) {
>       // We found but did not match the single column, skip to next row
>       return ReturnCode.NEXT_ROW;
>     }
>     if (!keyValue.matchingColumn(this.columnFamily, this.columnQualifier)) {
>       return ReturnCode.INCLUDE;
>     }
>     foundColumn = true;
>     if (filterColumnValue(keyValue.getBuffer(),
>         keyValue.getValueOffset(), keyValue.getValueLength())) {
>       return this.latestVersionOnly? ReturnCode.NEXT_ROW: ReturnCode.INCLUDE;
>     }
>     this.matchedColumn = true;
>     return ReturnCode.INCLUDE;
>   }
> {code}
> From the code above, it seeems that version 3 will be first emmited, and set matchedColumn
to true, which leads the following version 2 and 1 emmited too.

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