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https://issues.apache.org/jira/browse/HIVE-297?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12680675#action_12680675
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Raghotham Murthy edited comment on HIVE-297 at 3/10/09 4:07 PM:
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Duplicate of HIVE-285
was (Author: rsm):
Duplicate of HIVE-297
> Parses doesn't catch certain type errors.
> -----------------------------------------
>
> Key: HIVE-297
> URL: https://issues.apache.org/jira/browse/HIVE-297
> Project: Hadoop Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: S. Alex Smith
> Assignee: Raghotham Murthy
>
> The following query:
> FROM (
> FROM (FROM my_table
> SELECT CAST(userid AS BIGINT) AS userid a
> SELECT userid
> UNION ALL
> FROM (FROM my_table
> SELECT CAST(userid AS STRING) AS userid) b
> SELECT userid
> ) unioned
> SELECT DISTINCT userid;
> Is accepted by the parse, but throws the following at run-time:
> java.lang.RuntimeException: org.apache.hadoop.hive.serde2.SerDeException:
> java.lang.ClassCastException: java.lang.Long cannot be cast to
> java.lang.String
> (Note that this seems less silly if the inner queries are different tables
> with userid stored as a bigint and a string, respectively)
> I have interpreted this as a bug in the parser, but it could also be viewed
> as a bug about not auto-casting.
> This can be worked around by using explicit CAST statements.
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