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From "Fabien Le Gallo (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-10850) Unexpected behavior when using filter SingleColumnValueFilter
Date Thu, 27 Mar 2014 11:14:15 GMT
Fabien Le Gallo created HBASE-10850:
---------------------------------------

             Summary: Unexpected behavior when using filter SingleColumnValueFilter
                 Key: HBASE-10850
                 URL: https://issues.apache.org/jira/browse/HBASE-10850
             Project: HBase
          Issue Type: Bug
          Components: Filters
    Affects Versions: 0.96.1.1
            Reporter: Fabien Le Gallo


When using the filter SingleColumnValueFilter, and depending of the columns specified in the
scan (filtering column always specified), the results can be different.

Here is an example.
Suppose the following table:
||key||a:foo||a:bar||b:foo||b:bar||
|1|false|_flag_|_flag_|_flag_|
|2|true|_flag_|_flag_|_flag_|
|3| |_flag_|_flag_|_flag_|

With this filter:
{code}
SingleColumnValueFilter filter = new SingleColumnValueFilter(Bytes.toBytes("a"), Bytes.toBytes("foo"),
CompareOp.EQUAL, new BinaryComparator(Bytes.toBytes("false")));
filter.setFilterIfMissing(true);
{code}

Depending of how I specify the list of columns to add in the scan, the result is different.
Yet, all examples below should always return only the first row (key '1'):

OK:
{code}
scan.addFamily(Bytes.toBytes("a"));
{code}

KO (2 results returned, row '3' without 'a:foo' qualifier is returned):
{code}
scan.addFamily(Bytes.toBytes("a"));
scan.addFamily(Bytes.toBytes("b"));
{code}

KO (2 results returned, row '3' without 'a:foo' qualifier is returned):
{code}
scan.addColumn(Bytes.toBytes("a"), Bytes.toBytes("foo"));
scan.addColumn(Bytes.toBytes("a"), Bytes.toBytes("bar"));
scan.addColumn(Bytes.toBytes("b"), Bytes.toBytes("foo"));
{code}

OK:
{code}
scan.addColumn(Bytes.toBytes("a"), Bytes.toBytes("foo"));
scan.addColumn(Bytes.toBytes("b"), Bytes.toBytes("bar"));
{code}

OK:
{code}
scan.addColumn(Bytes.toBytes("a"), Bytes.toBytes("foo"));
scan.addColumn(Bytes.toBytes("a"), Bytes.toBytes("bar"));
{code}

This is a regression as it was working properly on HBase 0.92.
You will find in attachement the unit tests reproducing the issue.



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