Oracle CloudWorld Tokyo 2015 / 10-Apr-2015 JPOUG Meetup!

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select count(1) from foober;

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select count(1) from foober;

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select count(1) from foober;

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select count(1) from foober;

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select count(1) from foober;

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select count(1) from foober;

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select count(1) from foober;

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select count(1) from foober;

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select count(1) from foober;

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select count(1) from foober;

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select count(1) from foober;
・
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・

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・
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・
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7 AND status = '00'
8* AND ROWNUM <= 101
COUNT(1)
----------
101
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7* AND status = '00'
COUNT(1)
----------
10000
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7 AND status = '00'
8* AND ROWNUM <= 1
COUNT(1)
----------
1
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7* AND status = '01'
COUNT(1)
----------
0

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・
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・
・
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7* AND status = '00'
COUNT(1)
----------
10000
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN :1 AND :2
7 AND status = :3
8* AND ROWNUM <= :4
COUNT(1)
----------
1
COUNT(1)
----------
101
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7* AND status = ’01'
COUNT(1)
----------
0

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・
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・
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7* AND status = '00'
COUNT(1)
----------
10000
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN :1 AND :2
7 AND status = :3
8* AND ROWNUM <= :4
COUNT(1)
----------
1
COUNT(1)
----------
101
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7* AND status = ’01'
AND ROWNUM <= 1
COUNT(1)
----------
0

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・
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・
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN :1 AND :2
7* AND status = :3
COUNT(1)
----------
10000
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN :1 AND :2
7 AND status = :3
8* AND ROWNUM <= :4
COUNT(1) — タイプ２
----------
101
COUNT(1) — タイプ３
----------
1
COUNT(1) — タイプ４
----------
0

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★表
SQL> desc count4emptyset
名前 NULL? 型
----------------------------------------- -------- ----------------------------
ID NOT NULL NUMBER
BRANCH# NOT NULL NUMBER
STATUS NOT NULL CHAR(2)
DATA CHAR(500)
★索引
INDEX_NAME COLUMN_NAME DESC
------------------------------ ------------------------------ ----
PK_COUNT4EMPTYSET ID ASC
BRANCH# ASC
★列統計
COLUMN_NAME NUM_DISTINCT NUM_NULLS HISTOGRAM
------------------------------ ------------ ---------- ---------------
ID 1000 0 NONE
BRANCH# 1999 0 NONE
STATUS 1 0 FREQUENCY
DATA 1000 0 NONE
★索引統計
INDEX_NAME DISTINCT_KEYS NUM_ROWS CLUSTERING_FACTOR
------------------------------ ------------- ---------- -----------------
PK_COUNT4EMPTYSET 1000000 1000000 987729

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SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7* AND status = '00'
COUNT(1)
----------
10000
---------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows |..| Cost (%CPU)|..|
---------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 |..| 9931 (1)|..|
| 1 | SORT AGGREGATE | | 1 |..| |..|
|* 2 | TABLE ACCESS BY INDEX ROWID BATCHED| COUNT4EMPTYSET | 10008 |..| 9931 (1)|..|
|* 3 | INDEX RANGE SCAN | PK_COUNT4EMPTYSET | 10009 |..| 42 (0)|..|
---------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - filter("STATUS"='00')
3 - access("ID">=1 AND "ID"<=10)

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SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7* AND status = '00'
COUNT(1)
----------
10000
---------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows |..| Cost (%CPU)|..|
---------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 |..| 9931 (1)|..|
| 1 | SORT AGGREGATE | | 1 |..| |..|
|* 2 | TABLE ACCESS BY INDEX ROWID BATCHED| COUNT4EMPTYSET | 10008 |..| 9931 (1)|..|
|* 3 | INDEX RANGE SCAN | PK_COUNT4EMPTYSET | 10009 |..| 42 (0)|..|
---------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - filter("STATUS"='00')
3 - access("ID">=1 AND "ID"<=10)

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SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7* AND status = '00'
COUNT(1)
----------
10000
---------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows |..| Cost (%CPU)|..|
---------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 |..| 9931 (1)|..|
| 1 | SORT AGGREGATE | | 1 |..| |..|
|* 2 | TABLE ACCESS BY INDEX ROWID BATCHED| COUNT4EMPTYSET | 10008 |..| 9931 (1)|..|
|* 3 | INDEX RANGE SCAN | PK_COUNT4EMPTYSET | 10009 |..| 42 (0)|..|
---------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - filter("STATUS"='00')
3 - access("ID">=1 AND "ID"<=10)

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---------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows |..| Cost (%CPU)|..|
---------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 |..| 9931 (1)|..|
| 1 | SORT AGGREGATE | | 1 |..| |..|
|* 2 | TABLE ACCESS BY INDEX ROWID BATCHED| COUNT4EMPTYSET | 10008 |..| 9931 (1)|..|
|* 3 | INDEX RANGE SCAN | PK_COUNT4EMPTYSET | 10009 |..| 42 (0)|..|
---------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - filter("STATUS"='00')
3 - access("ID">=1 AND "ID"<=10)
統計
----------------------------------------------------------
0 recursive calls
0 db block gets
9893 consistent gets
0 physical reads
0 redo size
・・・・・ 略 ・・・・・・・
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows processed

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SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7* AND status = '00'
COUNT(1)
----------
10000
統計
-----------------------------
・・・・略・・・・
9893 consistent gets
0 physical reads
・・・・略・・・・
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7* AND status = '01'
COUNT(1)
----------
0
統計
-----------------------------
・・・・略・・・・
9893 consistent gets
0 physical reads
・・・・略・・・・

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---------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows |..| Cost (%CPU)|..|
---------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 |..| 9931 (1)|..|
| 1 | SORT AGGREGATE | | 1 |..| |..|
|* 2 | TABLE ACCESS BY INDEX ROWID BATCHED| COUNT4EMPTYSET | 10008 |..| 9931 (1)|..|
|* 3 | INDEX RANGE SCAN | PK_COUNT4EMPTYSET | 10009 |..| 42 (0)|..|
---------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - filter("STATUS"='00')
3 - access("ID">=1 AND "ID"<=10)
統計
----------------------------------------------------------
・・・・・ 略 ・・・・・・・
9893 consistent gets
・・・・・ 略 ・・・・・・・

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----------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
----------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 7 | 27 (0)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | 7 | | |
|* 2 | INDEX RANGE SCAN| IX1_COUNT4EMPTYSET | 10008 | 70056 | 27 (0)| 00:00:01 |
----------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - access("ID">=1 AND "STATUS"='00' AND "ID"<=10)
filter("STATUS"='00')
統計
----------------------------------------------------------
・・・・略・・・・
26 consistent gets
・・・・略・・・
治療済！

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SQL> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7 AND status = '00'
8* AND ROWNUM <= 101
COUNT(1)
----------
101
----------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows |..| Cost (%CPU)|..|
----------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 |..| 104 (0)|..|
| 1 | SORT AGGREGATE | | 1 |..| |..|
|* 2 | COUNT STOPKEY | | |..| |..|
|* 3 | TABLE ACCESS BY INDEX ROWID BATCHED| COUNT4EMPTYSET | 102 |..| 104 (0)|..|
|* 4 | INDEX RANGE SCAN | PK_COUNT4EMPTYSET | 10009 |..| 3 (0)|..|
----------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - filter(ROWNUM<=101)
3 - filter("STATUS"='00')
4 - access("ID">=1 AND "ID"<=10)

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SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7 AND status = '00'
8* AND ROWNUM <= 101
COUNT(1)
----------
101
統計
----------------------------
・・・・略・・・・
103 consistent gets
・・・・略・・・・
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7 AND status = '01'
8* AND ROWNUM <= 101
COUNT(1)
----------
0
統計
----------------------------
・・・・略・・・・
9893 consistent gets
・・・・略・・・・

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SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7 AND status = '00'
8* AND ROWNUM <= 1
COUNT(1)
----------
1
統計
----------------------------
・・・・略・・・・
4 consistent gets
・・・・略・・・・
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7 AND status = '01'
8* AND ROWNUM <= 1
COUNT(1)
----------
0
統計
----------------------------
・・・・略・・・・
9893 consistent gets
・・・・略・・・・

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SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7 AND status = '01'
8* AND ROWNUM <= 1
COUNT(1)
----------
0
統計
----------------------------
・・・・略・・・・
9893 consistent gets
・・・・略・・・・
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN 1 AND 10
7 AND status = ’00'
8* AND ROWNUM <= 1
COUNT(1)
----------
1
統計
----------------------------
・・・・略・・・・
4 consistent gets
・・・・略・・・・

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∼
----------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows |..| Cost (%CPU)|..|
----------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 |..| 9931 (1)|..|
| 1 | SORT AGGREGATE | | 1 |..| |..|
|* 2 | COUNT STOPKEY | | |..| |..|
|* 3 | TABLE ACCESS BY INDEX ROWID BATCHED| COUNT4EMPTYSET | 1 |..| 9931 (1)|..|
|* 4 | INDEX RANGE SCAN | PK_COUNT4EMPTYSET | 10009 |..| 42 (0)|..|
----------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - filter(ROWNUM<=101)
3 - filter("STATUS"='01')
4 - access("ID">=1 AND "ID"<=10)

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----------------------------------------------------------------------------
| Id | Operation | Name | Rows |..| Cost (%CPU)|..|
----------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 |..| 3 (0)|..|
| 1 | SORT AGGREGATE | | 1 |..| |..|
|* 2 | COUNT STOPKEY | | |..| |..|
|* 3 | INDEX RANGE SCAN| IX1_COUNT4EMPTYSET | 102 |..| 3 (0)|..|
----------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
2 - filter(ROWNUM<=101)
3 - access("ID">=1 AND "STATUS"='00' AND "ID"<=10)
filter("STATUS"='00')
COUNT(1)
----------
101
統計
-----------------------------
・・・・略・・・・
3 consistent gets
・・・・略・・・・
COUNT(1)
----------
0
統計
-----------------------------
・・・・略・・・・
24 consistent gets
・・・・略・・・・
∼
COUNT(1)
----------
1
統計
-----------------------------
・・・・略・・・・
4 consistent gets
・・・・略・・・・
治療済！

39. 3939
・
・
・
・
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN :1 AND :2
7* AND status = :3
SCOTT> r
1 SELECT
2 COUNT(1)
3 FROM
4 count4emptyset
5 WHERE
6 id BETWEEN :1 AND :2
7 AND status = :3
8* AND ROWNUM <= :4
+INDEX_NAME COLUMN_NAME
------------------------------ ------------------------------
IX1_COUNT4EMPTYSET ID
STATUS
治療完！

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SELECT
/*+
LEADING(t01 t02 t03)
USE_NL(t01 t02 t03)
INDEX(t01 ix01_count4emptyset)
INDEX(t02 ix01_count4emptyset_b)
INDEX(t03 ix01_count4emptyset_c)
*/
COUNT(1)
FROM
count4emptyset t01
INNER JOIN count4emptyset_b t02
ON
t01.id = t02.id
AND t01.branch# = t02.branch#
AND t02.status = '00'
INNER JOIN count4emptyset_c t03
ON
t02.id = t03.id
AND t02.branch# = t03.branch#
AND t03.status = '01'
WHERE
t01.id BETWEEN 1 AND 10
AND t01.status = '00'
AND ROWNUM <= 1;

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--------------------------------------------------------------------
| Id | Operation | Name |..| A-Rows |..
--------------------------------------------------------------------
| 0 | SELECT STATEMENT | |..| 1 |..
| 1 | SORT AGGREGATE | |..| 1 |..
|* 2 | COUNT STOPKEY | |..| 0 |..
| 3 | NESTED LOOPS | |..| 0 |..
| 4 | NESTED LOOPS | |..| 10000 |..
|* 5 | INDEX RANGE SCAN| IX01_COUNT4EMPTYSET |..| 10000 |..
|* 6 | INDEX RANGE SCAN| IX01_COUNT4EMPTYSET_B |..| 10000 |..
|* 7 | INDEX RANGE SCAN | IX01_COUNT4EMPTYSET_C |..| 0 |..
--------------------------------------------------------------------
∼
統計
------------------------------
・・・・略・・・・
812 consistent gets
0 physical reads
・・・・略・・・・
統計
------------------------------
・・・・略・・・・
9 consistent gets
0 physical reads
・・・・略・・・・

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http://discus-hamburg.cocolog-nifty.com/mac_de_oracle/2012/04/index-inde-only.html
http://discus-hamburg.cocolog-nifty.com/mac_de_oracle/2013/06/rownum-1-a44c.html
http://discus-hamburg.cocolog-nifty.com/mac_de_oracle/2014/07/table-access-by.html

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46. http://www.jpoug.org
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