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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-3341) TABLE FUNCTION returning CHAR values does not return a correct value if the Java ResultSet class returns a value less than the length of the defined CHAR.
Date Mon, 03 Mar 2008 15:42:52 GMT

    [ https://issues.apache.org/jira/browse/DERBY-3341?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12574566#action_12574566
] 

Rick Hillegas commented on DERBY-3341:
--------------------------------------

The same behavior plagues the diagnostic VTIs. You can demonstrate this by hacking AccessFactoryGlobals.USER_TRANS_NAME
to be a long string and then running the following update:

create table t2( col1 varchar(35 ) );

insert into t2( col1 )
SELECT type FROM SYSCS_DIAG.TRANSACTION_TABLE;

The declared type of TRANSACTION_TABLE.TYPE is varchar( 30 ) but there is no truncating cast
in the bind-time plan to cut the hacked value back to 30 characters.

> TABLE FUNCTION returning CHAR values does not return a correct value if the Java ResultSet
class returns a value less than the length of the defined CHAR.
> ----------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-3341
>                 URL: https://issues.apache.org/jira/browse/DERBY-3341
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>            Reporter: Daniel John Debrunner
>             Fix For: 10.4.0.0
>
>         Attachments: derby_3341_test.txt
>
>
> Defining a column in the returned type as CHAR(10) requires that the returned value be
of length 10 characters.
> Defining a table function with a return type of:
>    returns TABLE  column0 char( 10 ), column1 char( 10 ))
> seems to just return whatever the Java ResultSet implementation handed it.
> My guess this is true for all variable length types, no casting of the value occurs when
it is returned to the SQL domain.
> Java single value functions and procedure out parameters do perform any required casting
to ensure the value is of the declared type.

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