ASF GitHub Bot commented on FLINK-4639:

GitHub user twalthr opened a pull request:


    [FLINK-4639] [table] Make Calcite features more pluggable

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    This PR adds some means to modify Calcites behavior within the Table/SQL 
API. It introduces a `CalciteConfig` which is available through 
`tEnv.getConfig().getCalciteConfig()`. It allows to append/replace a rule set, 
append/replace SQL operators and replace the SQL parser so far. 

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/twalthr/flink FLINK-4639

Alternatively you can review and apply these changes as the patch at:


To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #2521
commit eaff44e29f09ecd0eb5e722df06bb9b2dc492d15
Author: twalthr <twal...@apache.org>
Date:   2016-09-20T09:35:25Z

    [FLINK-4639] [table] Make Calcite features more pluggable


> Make Calcite features more pluggable
> ------------------------------------
>                 Key: FLINK-4639
>                 URL: https://issues.apache.org/jira/browse/FLINK-4639
>             Project: Flink
>          Issue Type: New Feature
>          Components: Table API & SQL
>            Reporter: Timo Walther
>            Assignee: Timo Walther
> Some users might want to extend the feature set of the Table API by adding or 
> replacing Calcite optimizer rules, modifying the parser etc. It would be good 
> to have means to hook into the Table API and change Calcite behavior. We 
> should implement something like a {{CalciteConfigBuilder}}.

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