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Posted to dev@tajo.apache.org by "Hyunsik Choi (JIRA)" <ji...@apache.org> on 2013/12/31 17:57:50 UTC
[jira] [Commented] (TAJO-469) CTAS with no column definition will
get a NPE
[ https://issues.apache.org/jira/browse/TAJO-469?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13859567#comment-13859567 ]
Hyunsik Choi commented on TAJO-469:
-----------------------------------
+1
I totally agree with you. CTAS without a table schema should work as you mentioned.
> CTAS with no column definition will get a NPE
> ----------------------------------------------
>
> Key: TAJO-469
> URL: https://issues.apache.org/jira/browse/TAJO-469
> Project: Tajo
> Issue Type: Bug
> Components: planner/optimizer
> Affects Versions: 0.8-incubating
> Reporter: Min Zhou
>
> If you do a CTAS like this way
> {noformat}
> create table tbl partition by column(key float8) as select l_orderkey, l_partkey, l_quantity as key from lineitem;
> {noformat}
> You will get an NPE because that expr.getTableElements() returns null and this null value later be iterated.
> {noformat}
> 2013-12-30 23:28:55,582 ERROR master.GlobalEngine (GlobalEngine.java:executeQuery(177)) -
> Stack Trace:
> java.lang.NullPointerException
> at org.apache.tajo.engine.planner.LogicalPlanner.convertTableElementsSchema(LogicalPlanner.java:956)
> at org.apache.tajo.engine.planner.LogicalPlanner.convertTableElementsPartition(LogicalPlanner.java:844)
> at org.apache.tajo.engine.planner.LogicalPlanner.visitCreateTable(LogicalPlanner.java:785)
> at org.apache.tajo.engine.planner.LogicalPlanner.visitCreateTable(LogicalPlanner.java:81)
> at org.apache.tajo.engine.planner.BaseAlgebraVisitor.visit(BaseAlgebraVisitor.java:98)
> at org.apache.tajo.engine.planner.LogicalPlanner.createPlan(LogicalPlanner.java:114)
> at org.apache.tajo.master.GlobalEngine.createLogicalPlan(GlobalEngine.java:225)
> at org.apache.tajo.master.GlobalEngine.executeQuery(GlobalEngine.java:138)
> at org.apache.tajo.master.TajoMasterClientService$TajoMasterClientProtocolServiceHandler.submitQuery(TajoMasterClientService.java:134)
> at org.apache.tajo.ipc.TajoMasterClientProtocol$TajoMasterClientProtocolService$2.callBlockingMethod(TajoMasterClientProtocol.java:257)
> at org.apache.tajo.rpc.BlockingRpcServer$ServerHandler.messageReceived(BlockingRpcServer.java:91)
> 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$1.run(DeadLockProofWorker.java:42)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
> at java.lang.Thread.run(Thread.java:680)
> {noformat}
> I think this is caused by one of the different between create table DDL and CTAS. We can legally create a table by CTAS without define each columns' schema, just can use the output schema of select clause. But, create table DDL can't do it.
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