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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-1579) [hbase] Add new WhileMatchRowFilter and StopRowFilter filters
Date Sat, 21 Jul 2007 05:35:06 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-1579?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HADOOP-1579:
--------------------------

    Status: Patch Available  (was: Open)

+1

Builds and passes tests locally.  Trying against hudson.

> [hbase] Add new WhileMatchRowFilter and StopRowFilter filters
> -------------------------------------------------------------
>
>                 Key: HADOOP-1579
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1579
>             Project: Hadoop
>          Issue Type: New Feature
>          Components: contrib/hbase
>            Reporter: Izaak Rubin
>            Priority: Minor
>         Attachments: HADOOP-1579-v2.patch, HADOOP-1579-v3.patch, HADOOP-1579-v4.patch,
HADOOP-1579-v5.patch, HADOOP-1579-v6.patch, HADOOP-1579.patch
>
>
> I've created two additional filters for HBase: WhileMatchRowFilter and StopRowFilter.
 WhileMatchRowFilter is an extension of RegExpRowFilter; it also filters rows based on whether
they match a specified regex.  However, unlike its parent, WhileMatchRowFilter filters everything
after it's first filtered row - once a row fails to match regex or column specifications,
filterAllRemaining() always returns true.  This type of functionality will be useful when
filtering for a set of adjacent rows that match a certain regex (as opposed to every row that
matches that regex).
> StopRowFilter filters out every row greater than or equal to a specified rowKey (the
stopRow).  The filter assumes that the rowKeys it receives are in alphabetical order, so once
a key greater than the stopRow is encountered filterAllRemaining() will return true.  StopRowFilter
will be useful for alphabetical filtering.
> Both filters come with JUnit tests, namely TestWhileMatchRowFilter and TestStopRowFilter.

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