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https://issues.apache.org/jira/browse/HIVE-13659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15275161#comment-15275161
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Matt McCline commented on HIVE-13659:
-------------------------------------
Committed to master.
> An empty where condition leads to vectorization exceptions instead of
> throwing a compile time error
> ---------------------------------------------------------------------------------------------------
>
> Key: HIVE-13659
> URL: https://issues.apache.org/jira/browse/HIVE-13659
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Reporter: Matt McCline
> Assignee: Matt McCline
> Priority: Critical
> Fix For: 2.1.0
>
> Attachments: HIVE-13659.01.patch, HIVE-13659.02.patch,
> HIVE-13659.03.patch
>
>
> A partial query
> select count (distinct field) from table where field;
> Note the missing 'field=value'
> resulted in the following error in task logs, instead of failing early during
> compile
> {code}
> org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:173)
> at
> org.apache.hadoop.hive.ql.exec.tez.TezProcessor.run(TezProcessor.java:139)
> at
> org.apache.tez.runtime.LogicalIOProcessorRuntimeTask.run(LogicalIOProcessorRuntimeTask.java:344)
> at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:181)
> at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:172)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:415)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
> at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.callInternal(TezTaskRunner.java:172)
> at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.callInternal(TezTaskRunner.java:168)
> at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
> at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.RuntimeException:
> org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while
> processing row
> at
> org.apache.hadoop.hive.ql.exec.tez.MapRecordSource.processRow(MapRecordSource.java:91)
> at
> org.apache.hadoop.hive.ql.exec.tez.MapRecordSource.pushRecord(MapRecordSource.java:68)
> at
> org.apache.hadoop.hive.ql.exec.tez.MapRecordProcessor.run(MapRecordProcessor.java:326)
> at
> org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:150)
> ... 14 more
> Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime
> Error while processing row
> at
> org.apache.hadoop.hive.ql.exec.vector.VectorMapOperator.process(VectorMapOperator.java:52)
> at
> org.apache.hadoop.hive.ql.exec.tez.MapRecordSource.processRow(MapRecordSource.java:83)
> ... 17 more
> Caused by: java.lang.ClassCastException:
> org.apache.hadoop.hive.ql.exec.vector.BytesColumnVector cannot be cast to
> org.apache.hadoop.hive.ql.exec.vector.LongColumnVector
> at
> org.apache.hadoop.hive.ql.exec.vector.expressions.SelectColumnIsTrue.evaluate(SelectColumnIsTrue.java:46)
> at
> org.apache.hadoop.hive.ql.exec.vector.VectorFilterOperator.process(VectorFilterOperator.java:106)
> at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:838)
> at
> org.apache.hadoop.hive.ql.exec.TableScanOperator.process(TableScanOperator.java:97)
> at
> org.apache.hadoop.hive.ql.exec.MapOperator$MapOpCtx.forward(MapOperator.java:164)
> at
> org.apache.hadoop.hive.ql.exec.vector.VectorMapOperator.process(VectorMapOperator.java:45)
> ... 18 more
> {code}
> Comment by Gunther:
> I think this works by implicitly converting the expr to boolean (if a cast is
> necessary). This query looks legal to me and probably needs to be handle in
> Vectorization
> Comment by Ashutosh:
> Oracle, postgres & sql server throws error for this if type of field is not
> boolean. However, MySQL & Hive (with vectorization off) executes the query by
> implicitly adding a cast to boolean. Hive shall be consistent in its behavior
> regardless whether vectorization is on or off.
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