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https://issues.apache.org/jira/browse/FLINK-2871?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15110380#comment-15110380
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ASF GitHub Bot commented on FLINK-2871:
---------------------------------------

Github user fhueske commented on a diff in the pull request:

    https://github.com/apache/flink/pull/1469#discussion_r50381597
  
    --- Diff: 
flink-runtime/src/test/java/org/apache/flink/runtime/operators/util/HashVsSortMiniBenchmark.java
 ---
    @@ -184,7 +184,7 @@ public void testBuildFirst() {
                                        new ReusingBuildFirstHashJoinIterator<>(
                                                input1, input2, 
this.serializer1.getSerializer(), this.comparator1, 
                                                        
this.serializer2.getSerializer(), this.comparator2, this.pairComparator11,
    -                                                   this.memoryManager, 
this.ioManager, this.parentTask, MEMORY_SIZE, false, true);
    +                                                   this.memoryManager, 
this.ioManager, this.parentTask, 1, false, false, true);
    --- End diff --
    
    Ah, I see :-)


> Add OuterJoin strategy with HashTable on outer side
> ---------------------------------------------------
>
>                 Key: FLINK-2871
>                 URL: https://issues.apache.org/jira/browse/FLINK-2871
>             Project: Flink
>          Issue Type: New Feature
>          Components: Local Runtime, Optimizer
>    Affects Versions: 0.10.0
>            Reporter: Fabian Hueske
>            Assignee: Chengxiang Li
>            Priority: Minor
>
> Outer joins are currently supported with two local execution strategies:
> - sort-merge join
> - hash join where the hash table is built on the inner side. Hence, this 
> strategy is only supported for left and right outer joins.
> In order to support hash-tables on the outer side, we need a special hash 
> table implementation that gives access to all records which have not been 
> accessed during the probe phase.



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