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https://issues.apache.org/jira/browse/HIVE-17040?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16605030#comment-16605030
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Hive QA commented on HIVE-17040:
--------------------------------
Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12938538/HIVE-17040.04.patch
{color:red}ERROR:{color} -1 due to build exiting with an error
Test results:
https://builds.apache.org/job/PreCommit-HIVE-Build/13611/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/13611/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-13611/
Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
Tests exited with: Exception: Patch URL
https://issues.apache.org/jira/secure/attachment/12938538/HIVE-17040.04.patch
was found in seen patch url's cache and a test was probably run already on it.
Aborting...
{noformat}
This message is automatically generated.
ATTACHMENT ID: 12938538 - PreCommit-HIVE-Build
> Join elimination in the presence of FK relationship
> ---------------------------------------------------
>
> Key: HIVE-17040
> URL: https://issues.apache.org/jira/browse/HIVE-17040
> Project: Hive
> Issue Type: Sub-task
> Components: Logical Optimizer
> Affects Versions: 3.0.0
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Priority: Major
> Attachments: HIVE-17040.01.patch, HIVE-17040.02.patch,
> HIVE-17040.04.patch, HIVE-17040.patch
>
>
> If the PK/UK table is not filtered, we can safely remove the join.
> A simple example:
> {code:sql}
> SELECT c_current_cdemo_sk
> FROM customer, customer_address
> ON c_current_addr_sk = ca_address_sk;
> {code}
> As a Calcite rule, we could implement this rewriting by 1) matching a Project
> on top of a Join operator, 2) checking that only columns from the FK are used
> in the Project, 3) checking that the join condition matches the FK - PK/UK
> relationship, 4) pulling all the predicates from the PK/UK side and checking
> that the input is not filtered, and 5) removing the join, possibly adding a
> IS NOT NULL condition on the join column from the FK side.
> If the PK/UK table is filtered, we should still transform the Join into a
> SemiJoin operator.
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