Long string in SQL Stored Procedures.

I am writing Stored Procedures in the SQL language. Would prefer to write
as external service programs but company standard is to use SQL and we have
actually found it faster.

Any way, I am building dynamic SQL strings and because our database is so
un-normal we have really long SQL statements we are building. When I
attempt to compile, I am getting SQL strings too long or complex. The only
solution I have found is

If I do the following

SET String = 'Select VariableA,
VariableB
From FileA';
(Actual string a lot longer).

This will give me an error but if I do the following no error. All the
blanks are compressed out.

'Select Variablea, ' ||
' Variableb,' ||
' From FileA';

Ugly as hell.

In RPG, I can do the following

SET String = 'Select Variablea, +
VariableB +
From FileA';

As soon as RPG see the + it stops processing until it hits the next
non-blank characters.

As far as I can tell, you cannot do something like this in SQL.

Anybody else got a solution to this problem?