User defined Function in materlized view???

Question

Hi All:
can we use user defined functions in materlized views. If anybody know about it. Please help me. Thanks
Ali

Answer 1

Here we go... (see how quick it was)...
SQL> create or replace function myfunc(x in number) return number is
  2  begin
  3    return (x*2*3.14152);
  4  end;
  5  /
Function created.
SQL> create table a as select rownum x from dual connect by rownum <= 90;
Table created.
SQL> create materialized view as
  2
SQL> create materialized view mv_a as
  2  select x, myfunc(x) as x_2pi from a;
select x, myfunc(x) as x_2pi from a
ERROR at line 2:
ORA-12014: table 'A' does not contain a primary key constraint
SQL> alter table a add primary key (x);
Table altered.
SQL> create materialized view mv_a as
  2  select x, myfunc(x) as x_2pi from a;
Materialized view created.
SQL> select * from mv_a;
         X      X_2PI
         1    6.28304
         2   12.56608
         3   18.84912
         4   25.13216
         5    31.4152
         6   37.69824
         7   43.98128
         8   50.26432
         9   56.54736
        10    62.8304
        11   69.11344
        12   75.39648
        13   81.67952
etc.