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https://issues.apache.org/jira/browse/FLINK-2871?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15097056#comment-15097056
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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_r49655245
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/operators/DriverStrategy.java
---
@@ -73,6 +73,8 @@
LEFT_OUTER_MERGE(LeftOuterJoinDriver.class, null, MATERIALIZING,
MATERIALIZING, 2),
RIGHT_OUTER_MERGE(RightOuterJoinDriver.class, null, MATERIALIZING,
MATERIALIZING, 2),
FULL_OUTER_MERGE(FullOuterJoinDriver.class, null, MATERIALIZING,
MATERIALIZING, 2),
+ FULL_OUTER_HYBRIDHASH_BUILD_FIRST(FullOuterJoinDriver.class, null,
FULL_DAM, MATERIALIZING, 2),
--- End diff --
The strategies in this file are ordered by algorithm type, not by logical
operator type.
These hash join strategies should be put next to the other hash join
strategies.
> 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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