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From "Jark Wu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-11039) LogicalExchange and HashPartitioner realization
Date Sun, 02 Dec 2018 04:06:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-11039?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16706089#comment-16706089
] 

Jark Wu commented on FLINK-11039:
---------------------------------

Hi [~ambition], could you explain more about why we need to introduce LogicalExchange node
and what the benefit from this? 

> LogicalExchange and HashPartitioner realization
> -----------------------------------------------
>
>                 Key: FLINK-11039
>                 URL: https://issues.apache.org/jira/browse/FLINK-11039
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table API &amp; SQL
>    Affects Versions: 1.6.2, 1.7.0
>            Reporter: ambition
>            Priority: Minor
>             Fix For: 1.7.0
>
>
> FlinkLogicalExchange realizationĀ org.apache.calcite.rel.logical.LogicalExchange.
> HashPartitioner is Partitioner that implements hash-based partitioning using Java's `Object.hashCode`.
supportĀ org.apache.calcite.rel.RelDistribution.Type HASH_DISTRIBUTED



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