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Posted to derby-dev@db.apache.org by "Kathey Marsden (JIRA)" <ji...@apache.org> on 2012/09/11 20:24:09 UTC
[jira] [Resolved] (DERBY-129) Derby should throw a truncation error
or warning when CASTing a parameter/constant to char or char for bit
datatypes and the data is too large for the datatype.
[ https://issues.apache.org/jira/browse/DERBY-129?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Kathey Marsden resolved DERBY-129.
----------------------------------
Resolution: Fixed
> Derby should throw a truncation error or warning when CASTing a parameter/constant to char or char for bit datatypes and the data is too large for the datatype.
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: DERBY-129
> URL: https://issues.apache.org/jira/browse/DERBY-129
> Project: Derby
> Issue Type: Bug
> Components: JDBC
> Affects Versions: 10.0.2.1
> Reporter: Mamta A. Satoor
> Assignee: Knut Anders Hatlen
> Labels: derby_backport_reject_10_8, derby_triage10_8
> Fix For: 10.9.1.0
>
> Attachments: d129-1a.diff, d129-1b.diff, delta-1a-1b.diff
>
>
> Derby doesn't throw a truncation exception/warning when data is too large during casting of constants or parameters to character string or bit string data types.
> Following is ij example for constants which is too big for the datatype it is getting cast to
> ij> values (cast ('hello' as char(3)));
> 1
> ----
> hel
> 1 row selected
> ij> values (cast (X'0102' as char(1) for bit data));
> 1
> ----
> 01
> 1 row selected
> Following code snippet is when using parameters through a JDBC program
> s.executeUpdate("create table ct (c CLOB(100K))");
> //the following Formatters just loads cData with 32700 'c' characters
> String cData = org.apache.derbyTesting.functionTests.util.Formatters.repeatChar("c",32700);
> //notice that ? in the preared statement below is bound to length 32672
> pSt = con.prepareStatement("insert into ct values (cast (? as varchar(32672)))");
> pSt.setString(1, cData);
> //Derby doesn't throw an exception at ps.execute time for 32700 characters into 32672 parameter. It silently
> truncates it to 32672
> pSt.execute();
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