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https://issues.apache.org/jira/browse/HBASE-17472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15868115#comment-15868115
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Sean Busbey commented on HBASE-17472:
-------------------------------------
I'd even go so far as having the flag indicate the user wants the old behavior
so that the natural choice in HBase 2 can be what I think most folks expect
when you use grant, but I don't feel strongly about that part.
Major versions are made for this sort of change, so long as we flag it as
incompatible and write a release note it's okay to correct things in a way that
downstream folks have to pay attention to.
> Correct the semantic of permission grant
> -----------------------------------------
>
> Key: HBASE-17472
> URL: https://issues.apache.org/jira/browse/HBASE-17472
> Project: HBase
> Issue Type: Improvement
> Components: Admin
> Affects Versions: 2.0.0
> Reporter: huzheng
> Assignee: huzheng
> Fix For: 2.0.0
>
> Attachments: HBASE-17472.v1.patch, HBASE-17472.v2.patch,
> HBASE-17472.v3.patch, HBASE-17472.v4.patch, HBASE-17472.v5.patch
>
>
> Currently, HBase grant operation has following semantic:
> {code}
> hbase(main):019:0> grant 'hbase_tst', 'RW', 'ycsb'
> 0 row(s) in 0.0960 seconds
> hbase(main):020:0> user_permission 'ycsb'
> User
> Namespace,Table,Family,Qualifier:Permission
>
>
>
> hbase_tst default,ycsb,,:
> [Permission:actions=READ,WRITE]
>
>
> 1 row(s) in 0.0550 seconds
> hbase(main):021:0> grant 'hbase_tst', 'CA', 'ycsb'
> 0 row(s) in 0.0820 seconds
> hbase(main):022:0> user_permission 'ycsb'
> User
> Namespace,Table,Family,Qualifier:Permission
>
>
> hbase_tst default,ycsb,,:
> [Permission: actions=CREATE,ADMIN]
>
>
> 1 row(s) in 0.0490 seconds
> {code}
> Later permission will replace previous granted permissions, which confused
> most of HBase administrator.
> It's seems more reasonable that HBase merge multiple granted permission.
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