[jira] [Assigned] (TAJO-974) Eliminate unexpected case condition in SubQuery

["Hyoungjun Kim (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TAJO-974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyoungjun Kim reassigned TAJO-974:
----------------------------------

    Assignee: Hyoungjun Kim

> Eliminate unexpected case condition in SubQuery
> -----------------------------------------------
>
>                 Key: TAJO-974
>                 URL: https://issues.apache.org/jira/browse/TAJO-974
>             Project: Tajo
>          Issue Type: Bug
>          Components: distributed query plan
>            Reporter: Hyunsik Choi
>            Assignee: Hyoungjun Kim
>             Fix For: 0.9.0
>
>
> Please take a loot at the below code. In SubQuery::calculateShuffleOutputNum() method, if-condition will be passed through the unexpected case if the plan is neither group by and join. In current implementation, distinct group-by operator can cause this case. Actually, the below code is messy. We need to directly handle distinct group by and clean up the below code.
> {code:title="SubQuery::calculateShuffleOutputNum()"}
> } else {
>         LOG.info("============>>>>> Unexpected Case! <<<<<================");
>         long volume = getInputVolume(subQuery.masterPlan, subQuery.context, subQuery.block);
> {code}



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