Mega Code Archive

Alter session set OPTIMIZER_MODE = RULE

SQL> SQL> CREATE TABLE EMP (EMPNO NUMBER(4) NOT NULL, 2 ENAME VARCHAR2(10), 3 JOB VARCHAR2(9), 4 MGR NUMBER(4), 5 HIREDATE DATE, 6 SAL NUMBER(7, 2), 7 COMM NUMBER(7, 2), 8 DEPTNO NUMBER(2)); Table created. SQL> SQL> INSERT INTO EMP VALUES (7369, 'SMITH', 'CLERK', 7902, TO_DATE('17-DEC-1980', 'DD-MON-YYYY'), 800, NULL, 20); 1 row created. SQL> INSERT INTO EMP VALUES (7499, 'ALLEN', 'SALESMAN', 7698, TO_DATE('20-FEB-1981', 'DD-MON-YYYY'), 1600, 300, 30); 1 row created. SQL> INSERT INTO EMP VALUES (7521, 'WARD', 'SALESMAN', 7698, TO_DATE('22-FEB-1981', 'DD-MON-YYYY'), 1250, 500, 30); 1 row created. SQL> INSERT INTO EMP VALUES (7566, 'JONES', 'MANAGER', 7839, TO_DATE('2-APR-1981', 'DD-MON-YYYY'), 2975, NULL, 20); 1 row created. SQL> INSERT INTO EMP VALUES (7654, 'MARTIN', 'SALESMAN', 7698,TO_DATE('28-SEP-1981', 'DD-MON-YYYY'), 1250, 1400, 30); 1 row created. SQL> INSERT INTO EMP VALUES (7698, 'BLAKE', 'MANAGER', 7839,TO_DATE('1-MAY-1981', 'DD-MON-YYYY'), 2850, NULL, 30); 1 row created. SQL> INSERT INTO EMP VALUES (7782, 'CLARK', 'MANAGER', 7839,TO_DATE('9-JUN-1981', 'DD-MON-YYYY'), 2450, NULL, 10); 1 row created. SQL> INSERT INTO EMP VALUES (7788, 'SCOTT', 'ANALYST', 7566,TO_DATE('09-DEC-1982', 'DD-MON-YYYY'), 3000, NULL, 20); 1 row created. SQL> INSERT INTO EMP VALUES (7839, 'KING', 'PRESIDENT', NULL,TO_DATE('17-NOV-1981', 'DD-MON-YYYY'), 5000, NULL, 10); 1 row created. SQL> INSERT INTO EMP VALUES (7844, 'TURNER', 'SALESMAN', 7698,TO_DATE('8-SEP-1981', 'DD-MON-YYYY'), 1500, 0, 30); 1 row created. SQL> INSERT INTO EMP VALUES (7876, 'ADAMS', 'CLERK', 7788,TO_DATE('12-JAN-1983', 'DD-MON-YYYY'), 1100, NULL, 20); 1 row created. SQL> INSERT INTO EMP VALUES (7900, 'JAMES', 'CLERK', 7698,TO_DATE('3-DEC-1981', 'DD-MON-YYYY'), 950, NULL, 30); 1 row created. SQL> INSERT INTO EMP VALUES (7902, 'FORD', 'ANALYST', 7566,TO_DATE('3-DEC-1981', 'DD-MON-YYYY'), 3000, NULL, 20); 1 row created. SQL> INSERT INTO EMP VALUES (7934, 'MILLER', 'CLERK', 7782,TO_DATE('23-JAN-1982', 'DD-MON-YYYY'), 1300, NULL, 10); 1 row created. SQL> SQL> CREATE TABLE DEPT (DEPTNO NUMBER(2),DNAME VARCHAR2(14),LOC VARCHAR2(13) ); Table created. SQL> SQL> INSERT INTO DEPT VALUES (10, 'ACCOUNTING', 'NEW YORK'); 1 row created. SQL> INSERT INTO DEPT VALUES (20, 'RESEARCH', 'DALLAS'); 1 row created. SQL> INSERT INTO DEPT VALUES (30, 'SALES', 'CHICAGO'); 1 row created. SQL> INSERT INTO DEPT VALUES (40, 'OPERATIONS', 'BOSTON'); 1 row created. SQL> SQL> SQL> begin 2 dbms_stats.set_table_stats 3 ( user, 'EMP', numrows => 10000000, numblks => 1000000 ); 4 dbms_stats.set_table_stats 5 ( user, 'DEPT', numrows => 1000000, numblks => 100000 ); 6 end; 7 / PL/SQL procedure successfully completed. SQL> SQL> select * from emp, dept where emp.deptno = dept.deptno; EMPNO Employee Name JOB MGR HIREDATE Salary COMM DEPTNO DEPTNO DNAME LOC ---------- ------------- --------- ---------- --------- ---------- ---------- ---------- ---------- -------------- ------------- 7369 SMITH CLERK 7902 17-DEC-80 $800.00 20 20 RESEARCH DALLAS 7499 ALLEN SALESMAN 7698 20-FEB-81 $1,600.00 300 30 30 SALES CHICAGO 7521 WARD SALESMAN 7698 22-FEB-81 $1,250.00 500 30 30 SALES CHICAGO 7566 JONES MANAGER 7839 02-APR-81 $2,975.00 20 20 RESEARCH DALLAS 7654 MARTIN SALESMAN 7698 28-SEP-81 $1,250.00 1400 30 30 SALES CHICAGO 7698 BLAKE MANAGER 7839 01-MAY-81 $2,850.00 30 30 SALES CHICAGO 7782 CLARK MANAGER 7839 09-JUN-81 $2,450.00 10 10 ACCOUNTING NEW YORK EMPNO Employee Name JOB MGR HIREDATE Salary COMM DEPTNO DEPTNO DNAME LOC ---------- ------------- --------- ---------- --------- ---------- ---------- ---------- ---------- -------------- ------------- 7788 SCOTT ANALYST 7566 09-DEC-82 $3,000.00 20 20 RESEARCH DALLAS 7839 KING PRESIDENT 17-NOV-81 $5,000.00 10 10 ACCOUNTING NEW YORK 7844 TURNER SALESMAN 7698 08-SEP-81 $1,500.00 0 30 30 SALES CHICAGO 7876 ADAMS CLERK 7788 12-JAN-83 $1,100.00 20 20 RESEARCH DALLAS 7900 JAMES CLERK 7698 03-DEC-81 $950.00 30 30 SALES CHICAGO 7902 FORD ANALYST 7566 03-DEC-81 $3,000.00 20 20 RESEARCH DALLAS 7934 MILLER CLERK 7782 23-JAN-82 $1,300.00 10 10 ACCOUNTING NEW YORK 14 rows selected. SQL> SQL> alter session set OPTIMIZER_MODE = RULE; Session altered. SQL> SQL> select * from emp, dept where emp.deptno = dept.deptno; EMPNO Employee Name JOB MGR HIREDATE Salary COMM DEPTNO DEPTNO DNAME LOC ---------- ------------- --------- ---------- --------- ---------- ---------- ---------- ---------- -------------- ------------- 7782 CLARK MANAGER 7839 09-JUN-81 $2,450.00 10 10 ACCOUNTING NEW YORK 7839 KING PRESIDENT 17-NOV-81 $5,000.00 10 10 ACCOUNTING NEW YORK 7934 MILLER CLERK 7782 23-JAN-82 $1,300.00 10 10 ACCOUNTING NEW YORK 7566 JONES MANAGER 7839 02-APR-81 $2,975.00 20 20 RESEARCH DALLAS 7902 FORD ANALYST 7566 03-DEC-81 $3,000.00 20 20 RESEARCH DALLAS 7876 ADAMS CLERK 7788 12-JAN-83 $1,100.00 20 20 RESEARCH DALLAS 7369 SMITH CLERK 7902 17-DEC-80 $800.00 20 20 RESEARCH DALLAS EMPNO Employee Name JOB MGR HIREDATE Salary COMM DEPTNO DEPTNO DNAME LOC ---------- ------------- --------- ---------- --------- ---------- ---------- ---------- ---------- -------------- ------------- 7788 SCOTT ANALYST 7566 09-DEC-82 $3,000.00 20 20 RESEARCH DALLAS 7521 WARD SALESMAN 7698 22-FEB-81 $1,250.00 500 30 30 SALES CHICAGO 7844 TURNER SALESMAN 7698 08-SEP-81 $1,500.00 0 30 30 SALES CHICAGO 7499 ALLEN SALESMAN 7698 20-FEB-81 $1,600.00 300 30 30 SALES CHICAGO 7900 JAMES CLERK 7698 03-DEC-81 $950.00 30 30 SALES CHICAGO 7698 BLAKE MANAGER 7839 01-MAY-81 $2,850.00 30 30 SALES CHICAGO 7654 MARTIN SALESMAN 7698 28-SEP-81 $1,250.00 1400 30 30 SALES CHICAGO 14 rows selected. SQL> SQL> drop table emp cascade constraints; Table dropped. SQL> SQL> drop table dept cascade constraints; Table dropped. SQL> SQL> SQL>