Hi
I am trying to find estimated size for a view using
DBMS_OLAP.ESTIMATE_SUMMARY_SIZE package.
Using the following sql (logged in as SYS). I am new
to materialized views
and DBMS_OLAP.ESTIMATE_SUMMARY_SIZE usage.
I am doing this through SQL*Plus logged in as SYS.
I also set SERVEROUTPUT ON
and VAR num_bytes NUMBER
VAR num_rows NUMBER at SQL prompt in SQL*Plus.
Can someone help me how to find the estimated
size before creating a materialized view for the
following syntax for
the following.
thanks,
Srinivas
exec DBMS_OLAP.estimate_summary_size('test_est_size',
'SELECT empno, ename, dname, loc FROM scott.emp,
scott.dept where emp.deptno=dept.deptno',
:num_rows, :num_bytes)
This is the output I got :
SQL> set SERVEROUTPUT ON
SQL> show serveroutput
serveroutput ON size 2000 format WORD_WRAPPED
SQL> VAR num_rows number
SQL> var num_bytes number
SQL> var
variable mv_size
datatype NUMBER
variable num_bytes
datatype NUMBER
variable num_rows
datatype NUMBER
SQL> exec
DBMS_OLAP.estimate_summary_size('test_est_size',
'SELECT empno, ename, dname, loc FROM scott.emp,
scott.dept where emp.deptno=dept.deptno',
:num_rows, :num_bytes)
PL/SQL procedure successfully completed.
SQL> print :num_rows
NUM_ROWS
----------
SQL> print :num_bytes
NUM_BYTES
----------
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