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From "Bill Robertson (JIRA)" <derby-...@db.apache.org>
Subject [jira] Created: (DERBY-1306) Support more than just varchar with vertical bars on query
Date Tue, 09 May 2006 18:30:04 GMT
Support more than just varchar with vertical bars on query
----------------------------------------------------------

         Key: DERBY-1306
         URL: http://issues.apache.org/jira/browse/DERBY-1306
     Project: Derby
        Type: Improvement

    Versions: 10.1.2.1    
 Environment: Relevant for this?  Windows XP
    Reporter: Bill Robertson


I'm not sure if this is ij or derby proper, but the concat operator || should work for just
about any data type.  Derby is zero maintenance, but data rarely is, and a good sql interface
is important.  Often it's very convenient to write a query that generates other sql statements
and that's difficult w/o concatination.

e.g. create a table with a timestamp column, assume that the column name is originated.

Try the following query:

ij> select month(originated) || '-' || year(originated) from review;

get the following error:

ERROR 42846: Cannot convert types 'INTEGER' to 'VARCHAR'.

The conversion to a string should pretty much work all the time unless the operand is some
sort of blob type.

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