TABLE ACCESS (CLUSTER)

Description

Accesses rows in clustered tables based on index cluster key

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 is an example of the functionality replaced by TABLE ACCESS (BY USER ROWID)

This example was developed using Oracle 7.3.4

This example requires the following table definition 

    CREATE CLUSTER cl1 (c1 NUMBER);

    CREATE TABLE t1 (c1 NUMBER,c2 NUMBER)
    CLUSTER cl1 (c1);

    CREATE INDEX i1 ON CLUSTER cl1;

The cluster and table do not need to be analysed

The statement 

    SELECT c2 FROM t1
    WHERE c1 = 0;

generates the following execution plan 

0     SELECT STATEMENT Optimizer=CHOOSE
1   0   TABLE ACCESS (CLUSTER) OF 'T1'
2   1     INDEX (UNIQUE SCAN) OF 'I1' (NON-UNIQUE)