database indepent implementation of Concat() function

[andreas@…]

[jira2trac import : issue created on August 1, 2007 3:17:51 PM CEST ​http://issues.cocoondev.org/browse/DSY-521 ]

Currently, the implementation of the Concat() function of daisy's query language depends on the existence of the SQL string function CONCAT(). However, this MySQL-specific SQL-function is implemented differently on other databases, e.g. on PostgreSQL, we have the

operator for string concatenation (string1

string2 ). Therefore, the Implementation of that function should be made more flexible, the current solution does not allow to easily pass the

operator via the getStringConcatFunction() of the JdbcHelper? class. Affected files: org/outerj/daisy/query/model/functions/ConcatFunction.java, org/outerj/daisy/jdbcutil/JdbcHelper.java