Conditional compilation

[Thiemo Kellner <thiemo@xxxxxxxxxxxxxxxxxxxx>]

Hi

Does PostgreSQL have something like Oracle's conditional compilation? 
This is sort of an if then statement that gets evaluated on 
compilation/installation time of PL/SQL code. If the condition is met, 
the code until the $END gets compiled. It is even possible to switch 
on/off parts of single statements. I suppose it is sort of a 
preprocessor that removes the code part from $IF until $END if the 
condition is not met.

Kind regards

Thiemo