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https://issues.apache.org/jira/browse/HIVE-14138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15356710#comment-15356710
]
Peter Vary commented on HIVE-14138:
-----------------------------------
The patch of HIVE-14123 uses this select, and the error log might confuse users
> CBO failed for select current_database()
> ----------------------------------------
>
> Key: HIVE-14138
> URL: https://issues.apache.org/jira/browse/HIVE-14138
> Project: Hive
> Issue Type: Bug
> Components: CBO
> Reporter: Peter Vary
> Priority: Minor
>
> When issuing the following query, with hive.cbo.enable set to true:
> select current_database();
> The following exception is printed to the Hiveserver2 logs:
> 2016-06-30T09:58:24,146 ERROR [HiveServer2-Handler-Pool: Thread-33]
> parse.CalcitePlanner: CBO failed, skipping CBO.
> org.apache.hadoop.hive.ql.optimizer.calcite.CalciteSemanticException:
> Unsupported
> at
> org.apache.hadoop.hive.ql.parse.CalcitePlanner$CalcitePlannerAction.genLogicalPlan(CalcitePlanner.java:3136)
> at
> org.apache.hadoop.hive.ql.parse.CalcitePlanner$CalcitePlannerAction.apply(CalcitePlanner.java:940)
> at
> org.apache.hadoop.hive.ql.parse.CalcitePlanner$CalcitePlannerAction.apply(CalcitePlanner.java:894)
> at org.apache.calcite.tools.Frameworks$1.apply(Frameworks.java:113)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.perform(CalcitePrepareImpl.java:969)
> at org.apache.calcite.tools.Frameworks.withPrepare(Frameworks.java:149)
> at org.apache.calcite.tools.Frameworks.withPlanner(Frameworks.java:106)
> at
> org.apache.hadoop.hive.ql.parse.CalcitePlanner.getOptimizedAST(CalcitePlanner.java:712)
> at
> org.apache.hadoop.hive.ql.parse.CalcitePlanner.genOPTree(CalcitePlanner.java:280)
> at
> org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:10795)
> at
> org.apache.hadoop.hive.ql.parse.CalcitePlanner.analyzeInternal(CalcitePlanner.java:239)
> at
> org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:250)
> at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:438)
> at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:329)
> at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:1159)
> at org.apache.hadoop.hive.ql.Driver.compileAndRespond(Driver.java:1146)
> at
> org.apache.hive.service.cli.operation.SQLOperation.prepare(SQLOperation.java:191)
> at
> org.apache.hive.service.cli.operation.SQLOperation.runInternal(SQLOperation.java:276)
> at
> org.apache.hive.service.cli.operation.Operation.run(Operation.java:324)
> at
> org.apache.hive.service.cli.session.HiveSessionImpl.executeStatementInternal(HiveSessionImpl.java:464)
> at
> org.apache.hive.service.cli.session.HiveSessionImpl.executeStatementAsync(HiveSessionImpl.java:451)
> at
> org.apache.hive.service.cli.CLIService.executeStatementAsync(CLIService.java:295)
> at
> org.apache.hive.service.cli.thrift.ThriftCLIService.ExecuteStatement(ThriftCLIService.java:509)
> at
> org.apache.hive.service.rpc.thrift.TCLIService$Processor$ExecuteStatement.getResult(TCLIService.java:1437)
> at
> org.apache.hive.service.rpc.thrift.TCLIService$Processor$ExecuteStatement.getResult(TCLIService.java:1422)
> at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
> at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
> at
> org.apache.hive.service.auth.TSetIpAddressProcessor.process(TSetIpAddressProcessor.java:56)
> at
> org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:286)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
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