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https://issues.apache.org/jira/browse/FLINK-8236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16289369#comment-16289369
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Xingcan Cui edited comment on FLINK-8236 at 12/13/17 3:15 PM:
--------------------------------------------------------------
Hi [~twalthr], thanks for raising this. I got a question about the
{{setParallelism()}} method. In {{ExecutionConfig.java}}, I saw this default
value
{code:java}
/**
* The flag value indicating use of the default parallelism. This value can
* be used to reset the parallelism back to the default state.
*/
public static final int PARALLELISM_DEFAULT = -1;
{code}
However, almost all the {{setParallelism()}} methods (e.g.,
SingleOutputStreamOperator.setParallelism(),
StreamTransformation.setParallelism()) require the input to be at least 1. Is
that a contradiction？
Thanks, Xingcan
was (Author: xccui):
Hi [~twalthr], thanks for raising this. I got a question about the
{{setParallelism()}} method. In {{ExecutionConfig.java}}, I saw this default
value
{code:java}
/**
* The flag value indicating use of the default parallelism. This value can
* be used to reset the parallelism back to the default state.
*/
public static final int PARALLELISM_DEFAULT = -1;
{code}
However, all the {{setParallelism()}} methods require the input to be at least
1. Is that a contradiction？
Thanks, Xingcan
> 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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