Gunther Hagleitner created HIVE-5352:
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Summary: cast('1.0' as int) returns null
Key: HIVE-5352
URL: https://issues.apache.org/jira/browse/HIVE-5352
Project: Hive
Issue Type: Bug
Reporter: Gunther Hagleitner
Assignee: Gunther Hagleitner
Casting strings to int/smallint/bigint/tinyint yields null if the string isn't
a 'pure' integer. '1.0', '2.4', '1e5' all return null. I think for those cases
the cast should return the truncated int (i.e.: if c is string, cast(c as int)
should be the same as cast(cast(c as float) as int).
This is in line with the standard and is the same behavior as mysql and oracle.
(postgres and sql server throw error, see first answer here:
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/af3eff9c-737b-42fe-9016-05da9203a667/oracle-does-understand-cast10-as-int-why-sql-server-does-not)
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