[jira] [Updated] (TAJO-729) PreLogicalPlanVerifier verifies distinct aggregation functions incorrectly.

["Hyunsik Choi (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TAJO-729?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyunsik Choi updated TAJO-729:
------------------------------

    Attachment: TAJO-729.patch

> PreLogicalPlanVerifier verifies distinct aggregation functions incorrectly.
> ---------------------------------------------------------------------------
>
>                 Key: TAJO-729
>                 URL: https://issues.apache.org/jira/browse/TAJO-729
>             Project: Tajo
>          Issue Type: Bug
>          Components: planner/optimizer
>            Reporter: Hyunsik Choi
>            Assignee: Hyunsik Choi
>             Fix For: 0.8-incubating, 1.0-incubating
>
>         Attachments: TAJO-729.patch
>
>
> Since the current Tajo cannot process distinct aggregation functions for multiple columns, PreLogicalPlanVerifier prevents such a case. But, PreLogicalPlanVerifier checks it incorrectly. As a result, it causes a verification error even though a query can be actually executed in Tajo.
> See the below example. This query can be actually executed in Tajo. 
> {code:sql}
> select
>   count(distinct l_orderkey) as v0,
>   sum(l_orderkey) as v1,
>   sum(l_linenumber) as v2,
>   count(*) as v4
> from
>   lineitem
> group by
>   l_orderkey;
> {code}
> But, it causes the following verification error.
> {noformat}
> org.apache.tajo.engine.planner.PlanningException: different DISTINCT columns are not supported yet: l_orderkey, l_linenumber
>   at org.apache.tajo.engine.planner.PreLogicalPlanVerifier.visitProjection(PreLogicalPlanVerifier.java:89)
>   at org.apache.tajo.engine.planner.PreLogicalPlanVerifier.visitProjection(PreLogicalPlanVerifier.java:33)
>   at org.apache.tajo.engine.planner.BaseAlgebraVisitor.visit(BaseAlgebraVisitor.java:55)
>   at org.apache.tajo.engine.planner.PreLogicalPlanVerifier.verify(PreLogicalPlanVerifier.java:52)
>   at org.apache.tajo.master.GlobalEngine.createLogicalPlan(GlobalEngine.java:247)
>   at org.apache.tajo.master.GlobalEngine.executeQuery(GlobalEngine.java:138)
>   at org.apache.tajo.master.TajoMasterClientService$TajoMasterClientProtocolServiceHandler.submitQuery(TajoMasterClientService.java:286)
>   at org.apache.tajo.ipc.TajoMasterClientProtocol$TajoMasterClientProtocolService$2.callBlockingMethod(TajoMasterClientProtocol.java:513)
>   at org.apache.tajo.rpc.BlockingRpcServer$ServerHandler.messageReceived(BlockingRpcServer.java:103)
>   at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
>   at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
>   at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
>   at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296)
>   at org.jboss.netty.handler.codec.oneone.OneToOneDecoder.handleUpstream(OneToOneDecoder.java:70)
>   at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
>   at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
>   at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296)
>   at org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:462)
>   at org.jboss.netty.handler.codec.frame.FrameDecoder.callDecode(FrameDecoder.java:443)
>   at org.jboss.netty.handler.codec.frame.FrameDecoder.messageReceived(FrameDecoder.java:303)
>   at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
>   at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
>   at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
>   at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268)
>   at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255)
>   at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88)
>   at org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:109)
>   at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:312)
>   at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:90)
>   at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
>   at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
>   at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
>   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>   at java.lang.Thread.run(Thread.java:744)
> {noformat}



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