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https://issues.apache.org/jira/browse/HIVE-24639?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhihua Deng resolved HIVE-24639.
--------------------------------
Resolution: Duplicate
> Raises SemanticException other than ClassCastException when filter has
> non-boolean expressions
> ----------------------------------------------------------------------------------------------
>
> Key: HIVE-24639
> URL: https://issues.apache.org/jira/browse/HIVE-24639
> Project: Hive
> Issue Type: Improvement
> Reporter: Zhihua Deng
> Assignee: Zhihua Deng
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> Sometimes we see ClassCastException in filters when fetching some rows of a
> table or executing the query. The
> GenericUDFOPOr/GenericUDFOPAnd/FilterOperator assume that the output of their
> conditions should be a boolean, but there is no garanteed. For example:
> _select * from ccn_table where src + 1;_
> will throw ClassCastException:
> {code:java}
> Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to
> java.lang.Boolean
> at
> org.apache.hadoop.hive.ql.exec.FilterOperator.process(FilterOperator.java:125)
> at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:888)
> at
> org.apache.hadoop.hive.ql.exec.TableScanOperator.process(TableScanOperator.java:173)
> at
> org.apache.hadoop.hive.ql.exec.MapOperator$MapOpCtx.forward(MapOperator.java:153)
> at
> org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:553)
> ...{code}
> We'd better to validate the filter during analyzing instead of at runtime and
> bring more meaningful messages.
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