MAT_VIEW ACCESS (BY ROWID RANGE)

Description

Performs lookups using a range of ROWIDs directly against a materialized view

Versions

This operation is implemented in the following versions

Example

This example was developed using Oracle 10.2.0.1 on Linux

This example requires the following object definitions

    CREATE TABLE t1 (c1 NUMBER, c2 NUMBER);

    CREATE MATERIALIZED VIEW mv1
    BUILD IMMEDIATE
    ENABLE QUERY REWRITE
    AS
      SELECT c1,SUM(c2) AS sum_c2 
      FROM t1
      GROUP BY c1;

The statement

    SELECT sum_c2 FROM mv1
    WHERE ROWID > 
    (
      SELECT MIN (ROWID) FROM mv1
    );

generates the following execution plan

0     SELECT STATEMENT Optimizer=CHOOSE
1   0   MAT_VIEW ACCESS (BY ROWID RANGE) OF 'MV1'
2   1     SORT (AGGREGATE)
3   2       MAT_VIEW ACCESS (FULL) OF 'MV1'