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https://issues.apache.org/jira/browse/HBASE-8555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13663740#comment-13663740
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Liang Xie commented on HBASE-8555:
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And the 8555-trunk-v1.txt should be OK without any change.
> FilterList correctness was dominated by sub-filter(list) ordering randomly
> --------------------------------------------------------------------------
>
> Key: HBASE-8555
> URL: https://issues.apache.org/jira/browse/HBASE-8555
> Project: HBase
> Issue Type: Bug
> Components: Filters
> Affects Versions: 0.94.3
> Reporter: Liang Xie
> Assignee: Liang Xie
> Priority: Critical
> Attachments: 8555-trunk-v1.txt, HBASE-8555-0.94.txt,
> HBASE-8555-0.94-v2.txt, HBASE-8555-0.94-v3.txt
>
>
> say, ther're 10 rows, column value is i%2:
> row0 0
> row1 1
> row2 0
> row3 1
> row4 0
> row5 1
> row6 0
> row7 1
> row8 0
> row9 1
> 1: filter : row filter > row4 ===> row5 row6 row7 row8 row9
> 2: subFilterList: row filter <= row4 && column==0 ===> row0 row2 row4
> 3.1 filterlist[expected] filter || subFilterList ===> row0 row2 row4 row5
> row6 row7 row8 row9
> 3.2 filterlist[BUGON!] subFilterList || filter ===> row0 row1 row2 row3 row4
> row5 row6 row7 row8 row9
> (Please refer to the new testNestedFilterListWithSCVF case)
> It was found when i managed to transform the following SQL into HBase scan
> statement:
> select xxx from xxx where (pk <= xxx and column1 = xxx) or pk > xxx
> My finding is that we had an assumption for filter methods call sequence:
> e.g. filterRowKey() should be called before filterKeyValue().
> and the orignial filterList.filterRowKey impl broke it due to fast
> short-circuit returning.
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