SQL> set autotrace traceonly

SQL> select table_name from user_tables;

已選擇98行。

已用時間: 00: 00: 00.04

Execution Plan

----------------------------------------------------------

0 SELECT STATEMENT Optimizer=CHOOSE

1 0 NESTED LOOPS

2 1 NESTED LOOPS (OUTER)

3 2 NESTED LOOPS (OUTER)

4 3 NESTED LOOPS (OUTER)

5 4 NESTED LOOPS (OUTER)

6 5 NESTED LOOPS

7 6 TABLE ACCESS (BY INDEX ROWID) OF 'OBJ$'

8 7 INDEX (RANGE SCAN) OF 'I_OBJ2' (UNIQUE)

9 6 TABLE ACCESS (CLUSTER) OF 'TAB$'

10 9 INDEX (UNIQUE SCAN) OF 'I_OBJ#' (NON-UNIQUE)

11 5 TABLE ACCESS (BY INDEX ROWID) OF 'OBJ$'

12 11 INDEX (UNIQUE SCAN) OF 'I_OBJ1' (UNIQUE)

13 4 INDEX (UNIQUE SCAN) OF 'I_OBJ1' (UNIQUE)

14 3 TABLE ACCESS (CLUSTER) OF 'USER$'

15 14 INDEX (UNIQUE SCAN) OF 'I_USER#' (NON-UNIQUE)

16 2 TABLE ACCESS (CLUSTER) OF 'SEG$'

17 16 INDEX (UNIQUE SCAN) OF 'I_FILE#_BLOCK#' (NON-UNIQUE)

18 1 TABLE ACCESS (CLUSTER) OF 'TS$'

19 18 INDEX (UNIQUE SCAN) OF 'I_TS#' (NON-UNIQUE)

Statistics

----------------------------------------------------------

0 recursive calls

0 db block gets

1389 consistent gets

0 physical reads

0 redo size

2528 bytes sent via SQL*Net to client

569 bytes received via SQL*Net from client

8 SQL*Net roundtrips to/from client

0 sorts (memory)

0 sorts (disk)

98 rows processed

SQL>

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