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https://issues.apache.org/jira/browse/GORA-119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13256412#comment-13256412
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Ferdy Galema commented on GORA-119:
-----------------------------------
This would be very useful indeed. I can think of Nutchgora that uses it for
skipping rows that do not match the (generate/fetch..) mark. There are a few
ways to implement it:
A) The quick cheap workaround by passing filter options on Configuration so
that the store instance will apply it to all queries. A way to only make it
work for HBase. Easy to implement.
B) Make it a generic Query option, but make it optional. This allows for some
stores to implement it, but it won't be necessary. Clients need to accept that
filtering *might* be done, but still have to check every row in order to skip
were necessary.
C) Like B, the generic option, but create a generic implementation that makes
sure filtering is always applied, even for a Store does not explicitely
implements it. This way it is still optional for a store to implement it (i.e.
HBaseStore that applies regionside filtering) but when they don't, the generic
implementation at the Gora client side will still skip the rows before they are
passed to the application client.
I like to adopt for C.
> implement a filter enabled scan in gora
> ---------------------------------------
>
> Key: GORA-119
> URL: https://issues.apache.org/jira/browse/GORA-119
> Project: Apache Gora
> Issue Type: Improvement
> Affects Versions: 0.2
> Environment: gora hbase gora-core gora-hbase
> Reporter: raf shin
> Labels: filter, gora-core, gora-hbase, scan
> Fix For: 0.3
>
>
> it'll be very of help to implement a filtered scan to reduce the time of scan
> in gora-core and gora-hbase components.
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