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https://issues.apache.org/jira/browse/HBASE-2038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13221153#comment-13221153
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Lars Hofhansl commented on HBASE-2038:
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@Alex: Looks like preScannerOpen could actually change the passed Scan object
and add a filter. The API is a bit strange. Scan is marked final, but it is
perfectly OK (and possible, and final does not prevent that) to change it here.
postScannerOpen also gets the Scan object, but modifying it there is pointless.
@Anoop: Yep, for that we'd need to add INCLUDE_AND_SEEK_USING_HINT (similar to
the INCLUDE_AND_SEEK_NEXT_ROW that we already have). Shouldn't be hard to add,
I'm happy to do that, if that's the route we want to go with this.
> Coprocessors: Region level indexing
> -----------------------------------
>
> Key: HBASE-2038
> URL: https://issues.apache.org/jira/browse/HBASE-2038
> Project: HBase
> Issue Type: New Feature
> Components: coprocessors
> Reporter: Andrew Purtell
> Priority: Minor
>
> HBASE-2037 is a good candidate to be done as coprocessor. It also serve as a
> good goalpost for coprocessor environment design -- there should be enough of
> it so region level indexing can be reimplemented as a coprocessor without any
> loss of functionality.
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