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https://issues.apache.org/jira/browse/PHOENIX-852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14118280#comment-14118280
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Hudson commented on PHOENIX-852:
--------------------------------
SUCCESS: Integrated in Phoenix | 4.0 | Hadoop2 #88 (See
[https://builds.apache.org/job/Phoenix-4.0-hadoop2/88/])
PHOENIX-852 Optimize child/parent foreign key joins (maryannxue: rev
c39a05e289f915725d2b439e819ccd3a07dec56b)
* phoenix-core/src/test/java/org/apache/phoenix/schema/PDataTypeTest.java
* phoenix-core/src/main/java/org/apache/phoenix/schema/PArrayDataType.java
* phoenix-core/src/it/java/org/apache/phoenix/end2end/HashJoinIT.java
* phoenix-core/src/main/java/org/apache/phoenix/parse/HintNode.java
* phoenix-core/src/main/java/org/apache/phoenix/compile/WhereOptimizer.java
* phoenix-core/src/main/java/org/apache/phoenix/compile/QueryCompiler.java
* phoenix-core/src/main/java/org/apache/phoenix/compile/JoinCompiler.java
* phoenix-core/src/main/java/org/apache/phoenix/compile/WhereCompiler.java
* phoenix-core/src/main/java/org/apache/phoenix/compile/ScanRanges.java
* phoenix-core/src/main/java/org/apache/phoenix/join/HashCacheClient.java
* phoenix-core/src/main/java/org/apache/phoenix/execute/HashJoinPlan.java
* phoenix-core/src/main/java/org/apache/phoenix/schema/PDataType.java
> Optimize child/parent foreign key joins
> ---------------------------------------
>
> Key: PHOENIX-852
> URL: https://issues.apache.org/jira/browse/PHOENIX-852
> Project: Phoenix
> Issue Type: Improvement
> Reporter: James Taylor
> Assignee: Maryann Xue
> Attachments: 852-2.patch, 852-3.patch, 852-4.patch, 852.patch,
> PHOENIX-852.patch
>
>
> Often times a join will occur from a child to a parent. Our current algorithm
> would do a full scan of one side or the other. We can do much better than
> that if the HashCache contains the PK (or even part of the PK) from the table
> being joined to. In these cases, we should drive the second scan through a
> skip scan on the server side.
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