COUNT (STOPKEY)

Description

Indicates the limitation of the number of rows returned by using the ROWNUM pseudo-column

Versions

This operation is implemented in the following versions

7.3.4
8.0.4
8.0.5
8.0.6
8.1.5
8.1.6
8.1.7
9.0.1
9.2.0
10.1.0
10.2.0

Example

This example was developed using Oracle 9.2.0.1 on Windows 2000

This example requires the following table definition

    CREATE TABLE t1 (c1 NUMBER);

The table does not need to be analysed

The statement

    SELECT ROWNUM FROM t1
    WHERE ROWNUM < 10;

generates the following execution plan

0     SELECT STATEMENT Optimizer=CHOOSE
1   0   COUNT (STOPKEY)
2   1     TABLE ACCESS (FULL) OF 'T1'