Perform an index unique scan
This operation is implemented in the following versions
|
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 UNIQUE INDEX i1 ON t1 (c1);
The table does not need to be analysed
The statement
SELECT /*+ INDEX (t1 i1) */ c1 FROM t1 WHERE c1 = 10;
generates the following execution plan
0 SELECT STATEMENT Optimizer=CHOOSE 1 0 INDEX (UNIQUE SCAN) OF 'I1' (UNIQUE)