public SQLFunction findSQLFunction(String functionName) {
		// TODO: lower casing done here. Was done "at random" before; maybe not needed at all ?
		String name = functionName.toLowerCase();
		SQLFunction userFunction = userFunctions.get( name );
		return userFunction != null
				? userFunction
				: (SQLFunction) dialect.getFunctions().get( name );
	}

public SQLFunction findSQLFunction(String functionName) {
		return sfi.getSqlFunctionRegistry().findSQLFunction( functionName.toLowerCase() );
	}

public class SybaseSqlAnywhereDialect extends SybaseAnywhereDialect {

    public SybaseSqlAnywhereDialect() {
        super();
        registerFunction("dayofweek", new SQLFunctionTemplate(StandardBasicTypes.INTEGER, "datepart(weekday, ?1)")); //Will work 
        registerFunction("dayOfWeek", new SQLFunctionTemplate(StandardBasicTypes.INTEGER, "datepart(weekday, ?1)")); // NPE Exception
    }
}