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https://issues.apache.org/jira/browse/HBASE-6509?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alex Baranau updated HBASE-6509:
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Attachment: HBASE-6509.patch
Attached patch. Also created review request at
https://reviews.apache.org/r/6354/. More unit-tests to come (see review).
Please let me know your thoughts about API. I feel like setting mask (0s and 1s
only currently) via byte[] is might be overkill. Not sure if we'll need more
states for values. Using byte[] just looked handy to me from the client
prospective at the time I implemented this initially (some time ago)
> Implement fast-forwarding FuzzyRowFilter to allow filter rows e.g. by
> "???alex?b"
> ---------------------------------------------------------------------------------
>
> Key: HBASE-6509
> URL: https://issues.apache.org/jira/browse/HBASE-6509
> Project: HBase
> Issue Type: New Feature
> Components: filters
> Reporter: Alex Baranau
> Assignee: Alex Baranau
> Priority: Minor
> Attachments: HBASE-6509.patch
>
>
> Implement fuzzy row key filter to allow fetching records e.g. by this
> criteria: "???alex?b".
> This seems to be very useful as an alternative to select records by row keys
> by specifying their part which is not prefix part. Due to fast-forwarding
> nature of the filter in many situations this helps to avoid heavy full-table
> scans.
> This is especially effective when you have composite row key and (some of)
> its parts has fixed length. E.g. with the key of format userId_actionId_time,
> given that userId and actionId length is fixed, one can select user actions
> of specific type using fuzzy row key by specifying mask "????_myaction".
> Given fast-forwarding nature of filter, this will usually work much faster
> than doing whole table scan with any of the existing server-side filters.
> In many cases this can work as secondary-indexing alternative.
> Many times users implement it as a custom filter and many times they just
> don' know this is possible. Let's add it to the common codebase.
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