BITMAP CONVERSION (TO ROWIDS)

Description

Converts bitmaps into key values and ROWIDS

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 and index definitions 

    CREATE TABLE t1 (c1 NUMBER,c2 NUMBER);

    CREATE BITMAP INDEX i1 ON t1 (c1);

The table does not need to be analysed.

The statement 

    SELECT /*+ INDEX (t1 i1) */ ROWID FROM t1;

generates the following execution plan 

0     SELECT STATEMENT Optimizer=CHOOSE
1   0   BITMAP CONVERSION (TO ROWIDS)
2   1     BITMAP INDEX (FULL SCAN) OF 'I1'