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https://issues.apache.org/jira/browse/DERBY-2972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12524764
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Kathey Marsden commented on DERBY-2972:
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I am having trouble finding this rule (From the wiki page) in the SQL Spec.
Can someone point me to the section where this is defined?
7)For user defined functions' that return character string type, the return
type's collation will have the same collation as of the character set of the
schema that the function is defined in. The collation derivation will be
implicit.
Thanks
Kathey
> Update or select with function in the where clause causes with
> TERRITORY_BASED collation fails with ERROR 42818: Comparisons between
> 'VARCHAR' and 'VARCHAR' are not supported.
> -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: DERBY-2972
> URL: https://issues.apache.org/jira/browse/DERBY-2972
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.4.0.0
> Reporter: Kathey Marsden
> Assignee: Kathey Marsden
> Attachments: derby-2972_diff.txt, derby-2972_stat.txt
>
>
> The following update fails with ERROR 42818
> ij> update testing set a = PADSTRING('aa',2024) where a = PADSTRING('a',2024);
> ERROR 42818: Comparisons between 'VARCHAR' and 'VARCHAR' are not supported.
> See full script below
> onnect 'jdbc:derby:nordb;territory=no_NO;collation=TERRITORY_BASED';
> CREATE FUNCTION PADSTRING (DATA VARCHAR(32000), LENGTH INTEGER) RETURNS
> VARCHAR(32000) EXTERNAL NAME
> 'org.apache.derbyTesting.functionTests.util.Formatters.padString' LANGUAGE
> JAVA PARAMETER STYLE JAVA;
> create table testing
> (a varchar(2024), b varchar(1024), c varchar(1024), d varchar(2048), e
> varchar(300)) ;
> -- insert 9 rows into the table
> insert into testing values (PADSTRING('1',2024), PADSTRING('2',1024),
> PADSTRING('3',1024), PADSTRING('4',2048), PADSTRING('5',300));
> insert into testing values (PADSTRING('10',2024),
> PADSTRING('20',1024), PADSTRING('30',1024),
> PADSTRING('40',2048), PADSTRING('50',300));
> insert into testing values (PADSTRING('100',2024),
> PADSTRING('200',1024), PADSTRING('300',1024),
> PADSTRING('400',2048), PADSTRING('500',300));
> insert into testing values (PADSTRING('1000',2024),
> PADSTRING('2000',1024), PADSTRING('3000',1024),
> PADSTRING('4000',2048), PADSTRING('5000',300));
> insert into testing values (PADSTRING('10000',2024),
> PADSTRING('20000',1024), PADSTRING('30000',1024),
> PADSTRING('40000',2048), PADSTRING('50000',300));
> insert into testing values (PADSTRING('100000',2024),
> PADSTRING('200000',1024), PADSTRING('300000',1024),
> PADSTRING('400000',2048), PADSTRING('500000',300));
> insert into testing values (PADSTRING('1000000',2024),
> PADSTRING('2000000',1024), PADSTRING('3000000',1024),
> PADSTRING('4000000',2048), PADSTRING('5000000',300));
> insert into testing values (PADSTRING('10000000',2024),
> PADSTRING('20000000',1024), PADSTRING('30000000',1024),
> PADSTRING('40000000',2048), PADSTRING('50000000',300));
> insert into testing values (PADSTRING('100000000',2024),
> PADSTRING('200000000',1024), PADSTRING('300000000',1024),
> PADSTRING('400000000',2048), PADSTRING('500000000',300));
> update testing set a = PADSTRING('aa',2024) where a = PADSTRING('a',2024);
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