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