You don’t need permission to contribute. If you wish to contribute code, submit 
a pull request to https://github.com/apache/calcite/pulls 
<https://github.com/apache/calcite/pulls>. A committer will review the change, 
perhaps ask for modifications, and commit it to the git master branch. If it’s 
a larger change, log a JIRA case first and discuss what you plan to do before 
you start doing it.

Based on merit, the PMC appoints people committers, usually after a few 
successful contributions.

Julian



> On Jun 9, 2018, at 7:39 PM, vino yang <yanghua1...@gmail.com> wrote:
> 
> My JIRA user name is : yanghua
> 
> Thanks.
> 
> 2018-06-10 10:37 GMT+08:00 vino yang <yanghua1...@gmail.com>:
> 
>> Hi guys,
>> 
>> I'd like to contribute to calcite. Request for permission.
>> 
>> ---
>> Vino yang.
>> Thanks.
>> 

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