[TAJO-974] Eliminate unexpected case condition in SubQuery

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.9.0
• Component/s: distributed query plan
• Assignee: Hyoungjun Kim
• Reporter: Hyunsik Choi
• Created: 23/Jul/14 13:31
• Updated: 28/Jul/14 02:32
• Resolved: 28/Jul/14 02:26

Description

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.

"SubQuery::calculateShuffleOutputNum()"

} else {
        LOG.info("============>>>>> Unexpected Case! <<<<<================");
        long volume = getInputVolume(subQuery.masterPlan, subQuery.context, subQuery.block);