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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-5352) cast('1.0' as int) returns null
Date Fri, 27 Sep 2013 18:58:09 GMT

    [ https://issues.apache.org/jira/browse/HIVE-5352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13780251#comment-13780251
] 

Hudson commented on HIVE-5352:
------------------------------

FAILURE: Integrated in Hive-trunk-hadoop2-ptest #117 (See [https://builds.apache.org/job/Hive-trunk-hadoop2-ptest/117/])
HIVE-5352: cast(1.0 as int) returns null (Gunther Hagleitner via Thejas Nair) (thejas: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1526797)
* /hive/trunk/ql/src/test/org/apache/hadoop/hive/ql/udf/TestToInteger.java
* /hive/trunk/ql/src/test/queries/clientpositive/cast_to_int.q
* /hive/trunk/ql/src/test/results/clientpositive/cast_to_int.q.out
* /hive/trunk/serde/src/java/org/apache/hadoop/hive/serde2/lazy/LazyInteger.java
* /hive/trunk/serde/src/java/org/apache/hadoop/hive/serde2/lazy/LazyLong.java
* /hive/trunk/serde/src/test/org/apache/hadoop/hive/serde2/lazy/TestLazySimpleSerDe.java

                
> 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
>             Fix For: 0.12.0
>
>         Attachments: HIVE-5352.1.patch, HIVE-5352.2.patch, HIVE-5352.3.patch, HIVE-5352.4.patch,
HIVE-5352.5.patch
>
>
> Casting strings to int/smallint/bigint/tinyint yields null if the string isn't a 'pure'
integer. '1.0', '2.4' 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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