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https://issues.apache.org/jira/browse/DERBY-2866?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mamta A. Satoor resolved DERBY-2866.
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Resolution: Duplicate
This issue is duplicate of DERBY-2668.
> 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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