function that returns dynamicly created table

Hi everybody

I am pretty new to postgre and dunno if something like this is possible
in PL/pgSQL

I would like to create function create_table(integer[]) that returns
dynamically created table. Table is composed of several tables which
are left joined together. How many tables are joined is said by function
argument - integer field..

example :

field[] = {1,1,1} means function should return table1 left join
(table 2 leftjoin table 3);

field[]= {1,0,0} means function should return table 1;

if it is possible then pls let mi now how.....

thanx a lot
miso