LOAD AS SELECT

Description

Direct load using a SELECT statement as the source

Versions

This operation was introduced in Oracle 8.0.4. It replaced the CREATE AS SELECT operation

This operation is implemented in the following versions

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 operation can only be observed by using EXPLAIN PLAN to populate plan table. It does not appear in AUTOTRACE or V$SQL_PLAN

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

    EXPLAIN PLAN FOR
    CREATE TABLE t2 AS SELECT * FROM t1;

generates the following execution plan 

0     CREATE TABLE STATEMENT Optimizer=CHOOSE
1   0   LOAD AS SELECT
2   1     TABLE ACCESS (FULL) OF 'T1'