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From "Mamta A. Satoor (JIRA)" <j...@apache.org>
Subject [jira] Closed: (DERBY-2866) Improve error message when comparing user table and system table columns if collation doesn't match
Date Tue, 26 Jun 2007 19:55:26 GMT

     [ https://issues.apache.org/jira/browse/DERBY-2866?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mamta A. Satoor closed DERBY-2866.
----------------------------------


> Improve error message when comparing user table and system table columns if collation
doesn't match
> ---------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-2866
>                 URL: https://issues.apache.org/jira/browse/DERBY-2866
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 10.3.1.0
>            Reporter: Kathey Marsden
>            Priority: Minor
>
> If I create a database with TERRITORY_BASED collation and try to do a comparison between
a user table column and a system table column, I get the following message.  If I create it
with UCS_BASIC collation there is no problem with the query.  It makes sense to me that I
can't compare these columns but I think it  would be worthwhile to make a more informative
error message since in fact normally comparisons between VARCHAR and VARCHAR are supported,
just not comparisons between TERRITORY_BASED and UCS_BASIC.
> Kathey
> ij> connect 'jdbc:derby:enusdb;create=true;territory=en_US;collation=TERRITORY_BASED';
> ij(CONNECTION1)> create table t (vc varchar(30));
> 0 rows inserted/updated/deleted
> ij(CONNECTION1)> insert into t values('t');
> 1 row inserted/updated/deleted
> ij(CONNECTION1)> select tableName, vc from sys.systables, t  where vc = tableName;
> ERROR 42818: Comparisons between 'VARCHAR' and 'VARCHAR' are not supported.
> Bryan suggests ...
> Can we make it say something like:
> ERROR 42818: Comparisons between 'VARCHAR(en_US)' and 'VARCHAR(UCS_BASIC)' are not supported.
> That is, sort of pack the collation information into the datatype
> name somehow?

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