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https://issues.apache.org/jira/browse/HBASE-11274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14039602#comment-14039602
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Lars Hofhansl commented on HBASE-11274:
---------------------------------------
A while ago I made change to the RegionServer interface to give coprocessors
access to locks and leases.
So this *could* be done by coprocessor: (1) lock row (2) check condition on row
(3) apply update (4) release lock
I like the single row transactions as well. The only concern is that we're
straying into client specific territory rather than just storing bytes.
> More general single-row Condition Mutation
> ------------------------------------------
>
> Key: HBASE-11274
> URL: https://issues.apache.org/jira/browse/HBASE-11274
> Project: HBase
> Issue Type: Improvement
> Reporter: Liu Shaohui
> Priority: Minor
> Attachments: HBASE-11274-trunk-v1.diff
>
>
> Currently, the checkAndDelete and checkAndPut interface only support atomic
> mutation with single condition. But in actual apps, we need more general
> condition-mutation that support multi conditions and logical expression with
> those conditions.
> For example, to support the following sql
> {quote}
> insert row where (column A == 'X' and column B == 'Y') or (column C == 'z')
> {quote}
> Suggestions are welcomed.
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