Now create a script in the application of its function parameters and return values can be declared using %TYPE.
However, when you save the script is stored inside the server only what is considered his body. Thus, we obtain:
1) loss of the custom formatting.
2) loss of communication parameters and return types with these types of fields to create the function.
3) multidimensional arrays are transformed into one-dimensional: [][] -> []
4) loss of data accuracy: numeric(n,m) -> numeric
Please - how to save and restore the entire text of the definition to CREATE END; unchanged.
I am afraid, it is not possible
Postgres doesn't distinguish between multidimensional and one dimensional arrays - multidimensional is just syntax suger, same is function arguments - Postgres doesn't store precision for parameters. type%TYPE is translated to target type outside plpgsql function. These informations are not saved, so you cannot to take it from PostgreSQL