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From "Duo Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-18747) Introduce new example and helper classes to tell CP users how to do filtering on scanners
Date Sun, 03 Sep 2017 12:10:02 GMT
Duo Zhang created HBASE-18747:
---------------------------------

             Summary: Introduce new example and helper classes to tell CP users how to do
filtering on scanners
                 Key: HBASE-18747
                 URL: https://issues.apache.org/jira/browse/HBASE-18747
             Project: HBase
          Issue Type: Sub-task
          Components: Coprocessors
            Reporter: Duo Zhang


Finally we decided that CP users should not have the ability to create {{StoreScanner}} or
{{StoreFileScanner}}, so it is impossible for them to filter out some cells when flush or
compaction by simply provide a filter when constructing {{StoreScanner}}.

But I think filtering out some cells is a very important usage for CP users, so we need to
provide the ability in another way. Theoretically it can be done with wrapping an {{InternalScanner}},
but I think we need to give an example, or even some helper classes to help CP users.



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