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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4960) lastAlias in CommonJoinOperator is not used
Date Wed, 31 Jul 2013 01:30:48 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4960?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13724726#comment-13724726
] 

Hive QA commented on HIVE-4960:
-------------------------------



{color:red}Overall{color}: -1 at least one tests failed

Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12595045/HIVE-4960.D11895.1.patch

{color:red}ERROR:{color} -1 due to 1 failed/errored test(s), 2748 tests executed
*Failed tests:*
{noformat}
org.apache.hadoop.hive.cli.TestNegativeCliDriver.testNegativeCliDriver_script_broken_pipe1
{noformat}

Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/250/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/250/console

Messages:
{noformat}
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
Tests failed with: TestsFailedException: 1 tests failed
{noformat}

This message is automatically generated.
                
> lastAlias in CommonJoinOperator is not used
> -------------------------------------------
>
>                 Key: HIVE-4960
>                 URL: https://issues.apache.org/jira/browse/HIVE-4960
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Yin Huai
>            Assignee: Yin Huai
>            Priority: Minor
>         Attachments: HIVE-4960.D11895.1.patch
>
>
> In CommonJoinOperator, there is object called lastAlias. The initial value of this object
is 'null'. After tracing the usage of this object, I found that there is no place to change
the value of this object. Also, it is only used in processOp in JoinOperator and MapJoinOperator
as
> {code}
> if ((lastAlias == null) || (!lastAlias.equals(alias))) {
>   nextSz = joinEmitInterval;
> }
> {\code}
> Since lastAlias will always be null, we will assign joinEmitInterval to nextSz every
time we get a row. Later in processOp, we have 
> {code}
> nextSz = getNextSize(nextSz);
> {\code}
> Because we reset the value of nextSz to joinEmitInterval every time we get a row, seems
that getNextSize will not be used as expected.

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