INDEX (FULL SCAN (MIN/MAX))

Description

Returns the first or last entry in the index

Versions

This operation was introduced in Oracle 8.1.5

This operation is implemented in the following versions

8.1.5
8.1.6
8.1.7
9.0.1
9.2.0
10.1.0
10.2.0

Example

In this example the indexed columns must have a NOT NULL constraint

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,c2 NUMBER);

    CREATE INDEX i1 ON t1 (c1);

The table does not need to be analysed

The statement 

    SELECT /*+ INDEX (t1 i1) */ MIN (c1)
    FROM t1;

generates the following execution plan 

0     SELECT STATEMENT Optimizer=CHOOSE
1   0   SORT (AGGREGATE)
2   1     INDEX (FULL SCAN (MIN/MAX)) OF 'I1' (NON-UNIQUE)