FAQ
Hi,

Can you please help me out in solving this weird problem of funcation-based index not being used when I query the table.
This is the comand I fired and the result it returned me.

SQL> create table employees (last_name varchar2(20));
Table created.

SQL> CREATE INDEX upper_ix ON employees (UPPER(last_name));
Index created.

Made the autotrace on and than:-

3. SELECT last_name FROM employees WHERE UPPER(last_name) IS NOT NULL ORDER BY UPPER(last_name);

no rows selected.

Execution Plan

0 SELECT STATEMENT Optimizer=CHOOSE
1 0 SORT (ORDER BY)

2 1 TABLE ACCESS (FULL) OF 'EMPLOYEES'

I fired without order by clause also but no use.


Now can any body please let tell me why this Oracle is having a full scan of the employee table.

TIA,

Marul.



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postedAug 31, '02 at 8:48a
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