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https://issues.apache.org/jira/browse/FLINK-8236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16290676#comment-16290676
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Timo Walther commented on FLINK-8236:
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Yes, this issue is the first reason for the batch config.
> Allow to set the parallelism of table queries
> ---------------------------------------------
>
> Key: FLINK-8236
> URL: https://issues.apache.org/jira/browse/FLINK-8236
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Affects Versions: 1.4.0
> Reporter: Timo Walther
> Assignee: Xingcan Cui
>
> Right now the parallelism of a table program is determined by the parallelism
> of the stream/batch environment. E.g., by default, tumbling window operators
> use the default parallelism of the environment. Simple project and select
> operations have the same parallelism as the inputs they are applied on.
> While we cannot change forwarding operations because this would change the
> results when using retractions, it should be possible to change the
> parallelism for operators after shuffling operations.
> It should be possible to specify the default parallelism of a table program
> in the {{TableConfig}} and/or {{QueryConfig}}. The configuration per query
> has higher precedence that the configuration per table environment.
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