add common table expression in MySQL (#314)
This commit is contained in:
Aristoeu
2787
test/mysql_test/test_suite/with_clause/r/mysql/basic_mysql.result
Normal file
2787
test/mysql_test/test_suite/with_clause/r/mysql/basic_mysql.result
Normal file
File diff suppressed because it is too large
Load Diff
@ -0,0 +1,72 @@
|
||||
with cte(a,b) as (select 1 from dual) select * from cte;
|
||||
ERROR 5740 (HY000): number of WITH clause column names does not match number of elements in select list
|
||||
|
||||
with cte(a,b) as (with cte2(a,b) as (select 1,1 from dual) select a,b from cte) select * from cte;
|
||||
ERROR 5742 (HY000): recursive WITH clause must use a UNION ALL operation
|
||||
|
||||
with cte(a,a) as (select 1 from dual) select * from cte;
|
||||
ERROR 5751 (HY000): duplicate name found in column alias list for WITH clause
|
||||
|
||||
with cte as (select 1,1 from dual union all select a+1,b+1 from cte where cte.a < 10) select * from cte;
|
||||
ERROR 1054 (42S22): Unknown column 'cte.a' in 'where clause'
|
||||
|
||||
# MySQL不支持search depth关键字
|
||||
with cte(a,b,c) as
|
||||
(
|
||||
select 1,2,3 from dual
|
||||
union all
|
||||
select a+1,b+1,c+1 from cte where cte.c < 10
|
||||
) search depth first by d set pcol select * from cte;
|
||||
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your OceanBase version for the right syntax to use near 'search depth first by d set pcol select * from cte' at line 6
|
||||
|
||||
# MySQL不支持cycle关键字
|
||||
with cte(n, x) as (select /*+ materialize */ 1,2 from dual) cycle n,n set iscyc to 'aaaaay' default 'n' select * from cte;
|
||||
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your OceanBase version for the right syntax to use near 'cycle n,n set iscyc to 'aaaaay' default 'n' select * from cte' at line 1
|
||||
|
||||
with cte(a,b,c) as
|
||||
(
|
||||
select 1,2,3 from dual
|
||||
union
|
||||
select a+1,b+1,c+1 from cte, cte b where cte.c < 10 and b.c = cte.c
|
||||
) select * from cte;
|
||||
ERROR 5742 (HY000): recursive WITH clause must use a UNION ALL operation
|
||||
|
||||
with cte(a,b,c) as
|
||||
(
|
||||
select 1,2,3 from dual
|
||||
union all
|
||||
select 1,2,3 from dual
|
||||
union all
|
||||
select a+1,b+1,c+1 from cte, cte b where cte.c < 10 and b.c = cte.c
|
||||
) select * from cte;
|
||||
ERROR 5762 (HY000): recursive query name referenced more than once in recursive branch of recursive WITH clause element
|
||||
|
||||
with t1 as (select c1 from t1) select * from t1;
|
||||
ERROR 5741 (HY000): recursive WITH clause must have column alias list
|
||||
|
||||
## success
|
||||
with cte1(a,b) as (select 'a','b' from dual), cte2 as (select * from cte1 where b > 'c'), cte3 as (select * from cte2 where a > 1 union select * from cte2 where a > 1) select * from cte3;
|
||||
Empty set
|
||||
|
||||
with cte(a) as (select 1,1 from dual union all select a+1, a+1 from cte where a+1 < 10) select * from cte;
|
||||
ERROR 5740 (HY000): number of WITH clause column names does not match number of elements in select list
|
||||
|
||||
with cte(n) AS (select 1 from dual UNION ALL select n+1 from cte where n < 3 UNION ALL select 2 from dual) select * from cte;
|
||||
ERROR 5743 (HY000): UNION ALL operation in recursive WITH clause must have only two branches
|
||||
|
||||
with cte(n) AS ( select 1 from dual UNION ALL select sum(n+1) from cte) select * from cte;
|
||||
ERROR 5758 (HY000): unsupported operation in recursive branch of recursive WITH clause
|
||||
|
||||
with cte(n) AS ( select 1 from dual UNION ALL select (select 1 from dual) from cte where cte.n < 2) select * from cte;
|
||||
ERROR 5746 (HY000): cycle detected while executing recursive WITH query
|
||||
|
||||
with cte (c1, c2, c3) as ( select * from ( select c1, c2, c3 from t1 union select c1, c2, c3 from t1) where c1 = 1 union all select * from t1 join cte c on t1.c1 = c.c1 where c.c1 < 10 ) select * from cte;
|
||||
ERROR 1222 (21000): The used SELECT statements have a different number of columns
|
||||
|
||||
with cte(n) AS ( select 1 from cte) select * from cte;
|
||||
ERROR 5742 (HY000): recursive WITH clause must use a UNION ALL operation
|
||||
|
||||
with cte(n) AS (select 1 from dual UNION ALL select n+1 from cte where n < 3 order by n ) select * from cte;
|
||||
ERROR 1054 (42S22): Unknown column 'n' in 'order clause'
|
||||
|
||||
|
||||
@ -0,0 +1,796 @@
|
||||
WITH RECURSIVE cte (n) AS
|
||||
(
|
||||
SELECT 1
|
||||
UNION ALL
|
||||
SELECT n + 1 FROM cte WHERE n < 5
|
||||
)
|
||||
SELECT * FROM cte;
|
||||
+------+
|
||||
| n |
|
||||
+------+
|
||||
| 1 |
|
||||
| 2 |
|
||||
| 3 |
|
||||
| 4 |
|
||||
| 5 |
|
||||
+------+
|
||||
|
||||
WITH RECURSIVE cte AS
|
||||
(
|
||||
SELECT 1 AS n, CAST('abc' AS CHAR(20)) AS str
|
||||
UNION ALL
|
||||
SELECT n + 1, CONCAT(str, str) FROM cte WHERE n < 3
|
||||
)
|
||||
SELECT * FROM cte;
|
||||
+------+--------------+
|
||||
| n | str |
|
||||
+------+--------------+
|
||||
| 1 | abc |
|
||||
| 2 | abcabc |
|
||||
| 3 | abcabcabcabc |
|
||||
+------+--------------+
|
||||
|
||||
WITH RECURSIVE cte AS
|
||||
(
|
||||
SELECT 1 AS n, 1 AS p, -1 AS q
|
||||
UNION ALL
|
||||
SELECT n + 1, q * 2, p * 2 FROM cte WHERE n < 5
|
||||
)
|
||||
SELECT * FROM cte;
|
||||
+------+------+------+
|
||||
| n | p | q |
|
||||
+------+------+------+
|
||||
| 1 | 1 | -1 |
|
||||
| 2 | -2 | 2 |
|
||||
| 3 | 4 | -4 |
|
||||
| 4 | -8 | 8 |
|
||||
| 5 | 16 | -16 |
|
||||
+------+------+------+
|
||||
|
||||
WITH RECURSIVE fibonacci (n, fib_n, next_fib_n) AS
|
||||
(
|
||||
SELECT 1, 0, 1
|
||||
UNION ALL
|
||||
SELECT n + 1, next_fib_n, fib_n + next_fib_n
|
||||
FROM fibonacci WHERE n < 10
|
||||
)
|
||||
SELECT * FROM fibonacci;
|
||||
+------+-------+------------+
|
||||
| n | fib_n | next_fib_n |
|
||||
+------+-------+------------+
|
||||
| 1 | 0 | 1 |
|
||||
| 2 | 1 | 1 |
|
||||
| 3 | 1 | 2 |
|
||||
| 4 | 2 | 3 |
|
||||
| 5 | 3 | 5 |
|
||||
| 6 | 5 | 8 |
|
||||
| 7 | 8 | 13 |
|
||||
| 8 | 13 | 21 |
|
||||
| 9 | 21 | 34 |
|
||||
| 10 | 34 | 55 |
|
||||
+------+-------+------------+
|
||||
|
||||
WITH RECURSIVE fibonacci (n, fib_n, next_fib_n) AS
|
||||
(
|
||||
SELECT 1, 0, 1
|
||||
UNION ALL
|
||||
SELECT n + 1, next_fib_n, fib_n + next_fib_n
|
||||
FROM fibonacci WHERE n < 10
|
||||
)
|
||||
SELECT fib_n FROM fibonacci WHERE n = 8;
|
||||
+-------+
|
||||
| fib_n |
|
||||
+-------+
|
||||
| 13 |
|
||||
+-------+
|
||||
|
||||
create table sales(date DATE,price NUMBER(7,2));
|
||||
insert into sales values(str_to_date('2017-01-03', '%Y-%m-%d'),100);
|
||||
insert into sales values(str_to_date('2017-01-03', '%Y-%m-%d'),200);
|
||||
insert into sales values(str_to_date('2017-01-06', '%Y-%m-%d'),50);
|
||||
insert into sales values(str_to_date('2017-01-08', '%Y-%m-%d'),10);
|
||||
insert into sales values(str_to_date('2017-01-08', '%Y-%m-%d'),20);
|
||||
insert into sales values(str_to_date('2017-01-08', '%Y-%m-%d'),150);
|
||||
insert into sales values(str_to_date('2017-01-10', '%Y-%m-%d'),5);
|
||||
|
||||
SELECT * FROM sales ORDER BY date, price;
|
||||
+------------+--------+
|
||||
| date | price |
|
||||
+------------+--------+
|
||||
| 2017-01-03 | 100.00 |
|
||||
| 2017-01-03 | 200.00 |
|
||||
| 2017-01-06 | 50.00 |
|
||||
| 2017-01-08 | 10.00 |
|
||||
| 2017-01-08 | 20.00 |
|
||||
| 2017-01-08 | 150.00 |
|
||||
| 2017-01-10 | 5.00 |
|
||||
+------------+--------+
|
||||
|
||||
SELECT date, SUM(price) AS sum_price
|
||||
FROM sales
|
||||
GROUP BY date
|
||||
ORDER BY date;
|
||||
+------------+-----------+
|
||||
| date | sum_price |
|
||||
+------------+-----------+
|
||||
| 2017-01-03 | 300.00 |
|
||||
| 2017-01-06 | 50.00 |
|
||||
| 2017-01-08 | 180.00 |
|
||||
| 2017-01-10 | 5.00 |
|
||||
+------------+-----------+
|
||||
|
||||
WITH RECURSIVE dates (date) AS
|
||||
(
|
||||
SELECT MIN(date) FROM sales
|
||||
UNION ALL
|
||||
SELECT date + INTERVAL 1 DAY FROM dates
|
||||
WHERE date + INTERVAL 1 DAY <= (SELECT MAX(date) FROM sales)
|
||||
)
|
||||
SELECT * FROM dates;
|
||||
+------------+
|
||||
| date |
|
||||
+------------+
|
||||
| 2017-01-03 |
|
||||
| 2017-01-04 |
|
||||
| 2017-01-05 |
|
||||
| 2017-01-06 |
|
||||
| 2017-01-07 |
|
||||
| 2017-01-08 |
|
||||
| 2017-01-09 |
|
||||
| 2017-01-10 |
|
||||
+------------+
|
||||
|
||||
WITH RECURSIVE dates (date) AS
|
||||
(
|
||||
SELECT MIN(date) FROM sales
|
||||
UNION ALL
|
||||
SELECT date + INTERVAL 1 DAY FROM dates
|
||||
WHERE date + INTERVAL 1 DAY <= (SELECT MAX(date) FROM sales)
|
||||
)
|
||||
SELECT dates.date, COALESCE(SUM(price), 0) AS sum_price
|
||||
FROM dates LEFT JOIN sales ON dates.date = sales.date
|
||||
GROUP BY dates.date
|
||||
ORDER BY dates.date;
|
||||
+------------+-----------+
|
||||
| date | sum_price |
|
||||
+------------+-----------+
|
||||
| 2017-01-03 | 300.00 |
|
||||
| 2017-01-04 | 0.00 |
|
||||
| 2017-01-05 | 0.00 |
|
||||
| 2017-01-06 | 50.00 |
|
||||
| 2017-01-07 | 0.00 |
|
||||
| 2017-01-08 | 180.00 |
|
||||
| 2017-01-09 | 0.00 |
|
||||
| 2017-01-10 | 5.00 |
|
||||
+------------+-----------+
|
||||
|
||||
################################################################################################
|
||||
### PART 1 SQL syntax
|
||||
################################################################################################
|
||||
|
||||
WITH cte1(txt) AS (SELECT "This "),
|
||||
cte2(txt) AS (SELECT CONCAT(cte1.txt,"is a ") FROM cte1),
|
||||
cte3(txt) AS (SELECT "nice query" UNION
|
||||
SELECT "query that rocks" UNION
|
||||
SELECT "query"),
|
||||
cte4(txt) AS (SELECT concat(cte2.txt, cte3.txt) FROM cte2, cte3)
|
||||
SELECT MAX(txt), MIN(txt) FROM cte4;
|
||||
+----------------------------+----------------------+
|
||||
| MAX(txt) | MIN(txt) |
|
||||
+----------------------------+----------------------+
|
||||
| This is a query that rocks | This is a nice query |
|
||||
+----------------------------+----------------------+
|
||||
|
||||
WITH RECURSIVE my_cte AS
|
||||
(
|
||||
SELECT 1 AS n
|
||||
UNION ALL
|
||||
SELECT 1+n FROM my_cte WHERE n<10
|
||||
)
|
||||
SELECT * FROM my_cte;
|
||||
+------+
|
||||
| n |
|
||||
+------+
|
||||
| 1 |
|
||||
| 2 |
|
||||
| 3 |
|
||||
| 4 |
|
||||
| 5 |
|
||||
| 6 |
|
||||
| 7 |
|
||||
| 8 |
|
||||
| 9 |
|
||||
| 10 |
|
||||
+------+
|
||||
|
||||
CREATE TABLE numbers
|
||||
WITH RECURSIVE my_cte(n) AS
|
||||
(
|
||||
SELECT 1
|
||||
UNION ALL
|
||||
SELECT 1+n FROM my_cte WHERE n<6
|
||||
)
|
||||
SELECT * FROM my_cte;
|
||||
SELECT * FROM numbers;
|
||||
+------+
|
||||
| n |
|
||||
+------+
|
||||
| 1 |
|
||||
| 2 |
|
||||
| 3 |
|
||||
| 4 |
|
||||
| 5 |
|
||||
| 6 |
|
||||
+------+
|
||||
|
||||
INSERT INTO numbers
|
||||
WITH RECURSIVE my_cte(n) AS
|
||||
(
|
||||
SELECT 1
|
||||
UNION ALL
|
||||
SELECT 1+n FROM my_cte WHERE n<6
|
||||
)
|
||||
SELECT * FROM my_cte;
|
||||
|
||||
SELECT * FROM numbers;
|
||||
+------+
|
||||
| n |
|
||||
+------+
|
||||
| 1 |
|
||||
| 2 |
|
||||
| 3 |
|
||||
| 4 |
|
||||
| 5 |
|
||||
| 6 |
|
||||
| 1 |
|
||||
| 2 |
|
||||
| 3 |
|
||||
| 4 |
|
||||
| 5 |
|
||||
| 6 |
|
||||
+------+
|
||||
|
||||
DELETE FROM numbers
|
||||
WHERE numbers.n >
|
||||
(
|
||||
WITH RECURSIVE my_cte(n) AS
|
||||
(
|
||||
SELECT 1
|
||||
UNION ALL
|
||||
SELECT 1+n FROM my_cte WHERE n<6
|
||||
)
|
||||
SELECT AVG(n)/2 FROM my_cte
|
||||
);
|
||||
SELECT * FROM numbers;
|
||||
+------+
|
||||
| n |
|
||||
+------+
|
||||
| 1 |
|
||||
| 1 |
|
||||
+------+
|
||||
|
||||
################################################################################################
|
||||
### PART 2 generating series
|
||||
################################################################################################
|
||||
WITH RECURSIVE my_cte AS
|
||||
(
|
||||
SELECT 1 as f, 1 as next_f
|
||||
UNION ALL
|
||||
SELECT next_f, f+next_f FROM my_cte WHERE f < 500
|
||||
)
|
||||
SELECT * FROM my_cte;
|
||||
+------+--------+
|
||||
| f | next_f |
|
||||
+------+--------+
|
||||
| 1 | 1 |
|
||||
| 1 | 2 |
|
||||
| 2 | 3 |
|
||||
| 3 | 5 |
|
||||
| 5 | 8 |
|
||||
| 8 | 13 |
|
||||
| 13 | 21 |
|
||||
| 21 | 34 |
|
||||
| 34 | 55 |
|
||||
| 55 | 89 |
|
||||
| 89 | 144 |
|
||||
| 144 | 233 |
|
||||
| 233 | 377 |
|
||||
| 377 | 610 |
|
||||
| 610 | 987 |
|
||||
+------+--------+
|
||||
|
||||
WITH RECURSIVE
|
||||
digits AS
|
||||
(
|
||||
SELECT '0' AS d UNION ALL SELECT '1'
|
||||
),
|
||||
strings AS
|
||||
(
|
||||
SELECT CAST('' AS CHAR(4)) AS s
|
||||
UNION ALL
|
||||
SELECT CONCAT(strings.s, digits.d)
|
||||
FROM strings, digits
|
||||
WHERE LENGTH(strings.s) < 4
|
||||
)
|
||||
SELECT * FROM strings WHERE LENGTH(s)=4;
|
||||
+------+
|
||||
| s |
|
||||
+------+
|
||||
| 0000 |
|
||||
| 0001 |
|
||||
| 0010 |
|
||||
| 0011 |
|
||||
| 0100 |
|
||||
| 0101 |
|
||||
| 0110 |
|
||||
| 0111 |
|
||||
| 1000 |
|
||||
| 1001 |
|
||||
| 1010 |
|
||||
| 1011 |
|
||||
| 1100 |
|
||||
| 1101 |
|
||||
| 1110 |
|
||||
| 1111 |
|
||||
+------+
|
||||
|
||||
################################################################################################
|
||||
### PART 3 hierarchies
|
||||
################################################################################################
|
||||
CREATE TABLE category(
|
||||
category_id INT AUTO_INCREMENT PRIMARY KEY,
|
||||
name VARCHAR(20) NOT NULL,
|
||||
parent INT DEFAULT NULL
|
||||
);
|
||||
|
||||
INSERT INTO category VALUES(1,'ELECTRONICS',NULL),(2,'TELEVISIONS',1),(3,'TUBE',2),
|
||||
(4,'LCD',2),(5,'PLASMA',2),(6,'PORTABLE ELECTRONICS',1),(7,'MP3 PLAYERS',6),(8,'FLASH',7),
|
||||
(9,'CD PLAYERS',6),(10,'2 WAY RADIOS',6);
|
||||
|
||||
SELECT * FROM category ORDER BY category_id;
|
||||
+-------------+----------------------+--------+
|
||||
| category_id | name | parent |
|
||||
+-------------+----------------------+--------+
|
||||
| 1 | ELECTRONICS | NULL |
|
||||
| 2 | TELEVISIONS | 1 |
|
||||
| 3 | TUBE | 2 |
|
||||
| 4 | LCD | 2 |
|
||||
| 5 | PLASMA | 2 |
|
||||
| 6 | PORTABLE ELECTRONICS | 1 |
|
||||
| 7 | MP3 PLAYERS | 6 |
|
||||
| 8 | FLASH | 7 |
|
||||
| 9 | CD PLAYERS | 6 |
|
||||
| 10 | 2 WAY RADIOS | 6 |
|
||||
+-------------+----------------------+--------+
|
||||
|
||||
#Retrieving a Full Tree
|
||||
|
||||
WITH RECURSIVE cte AS
|
||||
(
|
||||
# seed SELECT
|
||||
SELECT category_id, name FROM category WHERE parent IS NULL
|
||||
UNION ALL
|
||||
# recursive SELECT
|
||||
SELECT c.category_id, c.name FROM category c JOIN cte
|
||||
ON cte.category_id=c.parent # find children
|
||||
)
|
||||
SELECT category_id, name FROM cte;
|
||||
+-------------+----------------------+
|
||||
| category_id | name |
|
||||
+-------------+----------------------+
|
||||
| 1 | ELECTRONICS |
|
||||
| 6 | PORTABLE ELECTRONICS |
|
||||
| 2 | TELEVISIONS |
|
||||
| 10 | 2 WAY RADIOS |
|
||||
| 9 | CD PLAYERS |
|
||||
| 7 | MP3 PLAYERS |
|
||||
| 5 | PLASMA |
|
||||
| 4 | LCD |
|
||||
| 3 | TUBE |
|
||||
| 8 | FLASH |
|
||||
+-------------+----------------------+
|
||||
|
||||
WITH RECURSIVE cte AS
|
||||
(
|
||||
SELECT category_id, name, 0 AS depth FROM category WHERE parent IS NULL
|
||||
UNION ALL
|
||||
SELECT c.category_id, c.name, cte.depth+1 FROM category c JOIN cte ON
|
||||
cte.category_id=c.parent
|
||||
)
|
||||
SELECT * FROM cte ORDER BY depth;
|
||||
+-------------+----------------------+-------+
|
||||
| category_id | name | depth |
|
||||
+-------------+----------------------+-------+
|
||||
| 1 | ELECTRONICS | 0 |
|
||||
| 6 | PORTABLE ELECTRONICS | 1 |
|
||||
| 2 | TELEVISIONS | 1 |
|
||||
| 10 | 2 WAY RADIOS | 2 |
|
||||
| 9 | CD PLAYERS | 2 |
|
||||
| 7 | MP3 PLAYERS | 2 |
|
||||
| 5 | PLASMA | 2 |
|
||||
| 4 | LCD | 2 |
|
||||
| 3 | TUBE | 2 |
|
||||
| 8 | FLASH | 3 |
|
||||
+-------------+----------------------+-------+
|
||||
|
||||
WITH RECURSIVE cte AS
|
||||
(
|
||||
SELECT category_id, name, CAST(category_id AS CHAR(200)) AS path
|
||||
FROM category WHERE parent IS NULL
|
||||
UNION ALL
|
||||
SELECT c.category_id, c.name, CONCAT(cte.path, ",", c.category_id)
|
||||
FROM category c JOIN cte ON cte.category_id=c.parent
|
||||
)
|
||||
SELECT * FROM cte ORDER BY path;
|
||||
+-------------+----------------------+---------+
|
||||
| category_id | name | path |
|
||||
+-------------+----------------------+---------+
|
||||
| 1 | ELECTRONICS | 1 |
|
||||
| 2 | TELEVISIONS | 1,2 |
|
||||
| 3 | TUBE | 1,2,3 |
|
||||
| 4 | LCD | 1,2,4 |
|
||||
| 5 | PLASMA | 1,2,5 |
|
||||
| 6 | PORTABLE ELECTRONICS | 1,6 |
|
||||
| 10 | 2 WAY RADIOS | 1,6,10 |
|
||||
| 7 | MP3 PLAYERS | 1,6,7 |
|
||||
| 8 | FLASH | 1,6,7,8 |
|
||||
| 9 | CD PLAYERS | 1,6,9 |
|
||||
+-------------+----------------------+---------+
|
||||
|
||||
#Finding all the leaf nodes
|
||||
|
||||
SELECT category_id, name FROM category
|
||||
WHERE category_id NOT IN
|
||||
# IDs of all parents:
|
||||
(SELECT parent FROM category WHERE parent IS NOT NULL);
|
||||
+-------------+--------------+
|
||||
| category_id | name |
|
||||
+-------------+--------------+
|
||||
| 3 | TUBE |
|
||||
| 4 | LCD |
|
||||
| 5 | PLASMA |
|
||||
| 8 | FLASH |
|
||||
| 9 | CD PLAYERS |
|
||||
| 10 | 2 WAY RADIOS |
|
||||
+-------------+--------------+
|
||||
|
||||
#Retrieving a Single Path
|
||||
|
||||
WITH RECURSIVE cte AS
|
||||
(
|
||||
SELECT name, parent FROM category WHERE name='FLASH'
|
||||
UNION ALL
|
||||
SELECT c.name, c.parent FROM category c JOIN cte
|
||||
ON c.category_id=cte.parent # find parent
|
||||
)
|
||||
SELECT * FROM cte;
|
||||
+----------------------+--------+
|
||||
| name | parent |
|
||||
+----------------------+--------+
|
||||
| FLASH | 7 |
|
||||
| MP3 PLAYERS | 6 |
|
||||
| PORTABLE ELECTRONICS | 1 |
|
||||
| ELECTRONICS | NULL |
|
||||
+----------------------+--------+
|
||||
|
||||
WITH RECURSIVE cte AS
|
||||
(
|
||||
SELECT name, parent, 0 as depth FROM category WHERE name='FLASH'
|
||||
UNION ALL
|
||||
SELECT c.name, c.parent, cte.depth-1 FROM category c JOIN cte
|
||||
ON c.category_id=cte.parent
|
||||
)
|
||||
SELECT * FROM cte ORDER BY depth;
|
||||
+----------------------+--------+-------+
|
||||
| name | parent | depth |
|
||||
+----------------------+--------+-------+
|
||||
| ELECTRONICS | NULL | -3 |
|
||||
| PORTABLE ELECTRONICS | 1 | -2 |
|
||||
| MP3 PLAYERS | 6 | -1 |
|
||||
| FLASH | 7 | 0 |
|
||||
+----------------------+--------+-------+
|
||||
|
||||
#Finding the Depth of the Nodes
|
||||
|
||||
WITH RECURSIVE cte AS
|
||||
(
|
||||
SELECT category_id, CAST(name AS CHAR(200)) AS name,
|
||||
CAST(category_id AS CHAR(200)) AS path,
|
||||
0 as depth
|
||||
FROM category WHERE parent IS NULL
|
||||
UNION ALL
|
||||
SELECT c.category_id,
|
||||
CONCAT(REPEAT(' ', cte.depth+1), c.name), # indentation
|
||||
CONCAT(cte.path, ",", c.category_id),
|
||||
cte.depth+1
|
||||
FROM category c JOIN cte ON
|
||||
cte.category_id=c.parent
|
||||
)
|
||||
SELECT * FROM cte ORDER BY path;
|
||||
+-------------+-----------------------+---------+-------+
|
||||
| category_id | name | path | depth |
|
||||
+-------------+-----------------------+---------+-------+
|
||||
| 1 | ELECTRONICS | 1 | 0 |
|
||||
| 2 | TELEVISIONS | 1,2 | 1 |
|
||||
| 3 | TUBE | 1,2,3 | 2 |
|
||||
| 4 | LCD | 1,2,4 | 2 |
|
||||
| 5 | PLASMA | 1,2,5 | 2 |
|
||||
| 6 | PORTABLE ELECTRONICS | 1,6 | 1 |
|
||||
| 10 | 2 WAY RADIOS | 1,6,10 | 2 |
|
||||
| 7 | MP3 PLAYERS | 1,6,7 | 2 |
|
||||
| 8 | FLASH | 1,6,7,8 | 3 |
|
||||
| 9 | CD PLAYERS | 1,6,9 | 2 |
|
||||
+-------------+-----------------------+---------+-------+
|
||||
|
||||
#Depth of a sub-tree
|
||||
|
||||
WITH RECURSIVE cte AS
|
||||
(
|
||||
SELECT category_id, name,
|
||||
CAST(category_id AS CHAR(200)) AS path,
|
||||
0 as depth
|
||||
FROM category WHERE name='PORTABLE ELECTRONICS' # sub-tree root
|
||||
UNION ALL
|
||||
SELECT c.category_id,
|
||||
c.name,
|
||||
CONCAT(cte.path, ",", c.category_id),
|
||||
cte.depth+1
|
||||
FROM category c JOIN cte
|
||||
ON cte.category_id=c.parent
|
||||
)
|
||||
SELECT * FROM cte ORDER BY path;
|
||||
+-------------+----------------------+-------+-------+
|
||||
| category_id | name | path | depth |
|
||||
+-------------+----------------------+-------+-------+
|
||||
| 6 | PORTABLE ELECTRONICS | 6 | 0 |
|
||||
| 10 | 2 WAY RADIOS | 6,10 | 1 |
|
||||
| 7 | MP3 PLAYERS | 6,7 | 1 |
|
||||
| 8 | FLASH | 6,7,8 | 2 |
|
||||
| 9 | CD PLAYERS | 6,9 | 1 |
|
||||
+-------------+----------------------+-------+-------+
|
||||
|
||||
#Find the immediate subordinates of a node
|
||||
|
||||
WITH RECURSIVE cte AS
|
||||
(
|
||||
SELECT category_id, name, 0 as depth
|
||||
FROM category WHERE name='PORTABLE ELECTRONICS'
|
||||
UNION ALL
|
||||
SELECT c.category_id, c.name, cte.depth+1
|
||||
FROM category c JOIN cte
|
||||
ON cte.category_id=c.parent
|
||||
WHERE cte.depth=0
|
||||
)
|
||||
SELECT * FROM cte;
|
||||
+-------------+----------------------+-------+
|
||||
| category_id | name | depth |
|
||||
+-------------+----------------------+-------+
|
||||
| 6 | PORTABLE ELECTRONICS | 0 |
|
||||
| 10 | 2 WAY RADIOS | 1 |
|
||||
| 9 | CD PLAYERS | 1 |
|
||||
| 7 | MP3 PLAYERS | 1 |
|
||||
+-------------+----------------------+-------+
|
||||
|
||||
#Aggregate functions in a nested set
|
||||
|
||||
CREATE TABLE product(
|
||||
category_id INT AUTO_INCREMENT PRIMARY KEY,
|
||||
name VARCHAR(20) NOT NULL,
|
||||
parent INT DEFAULT NULL
|
||||
);
|
||||
|
||||
INSERT INTO product VALUES(1,'ELECTRONICS',NULL),(2,'TELEVISIONS',1),(3,'TUBE',2),
|
||||
(4,'LCD',2),(5,'PLASMA',2),(6,'PORTABLE ELECTRONICS',1),(7,'MP3 PLAYERS',6),(8,'FLASH',7),
|
||||
(9,'CD PLAYERS',6),(10,'2 WAY RADIOS',6);
|
||||
|
||||
|
||||
WITH RECURSIVE cte AS
|
||||
(
|
||||
SELECT c.category_id, c.name AS cat_name, c.parent, p.name AS prod_name
|
||||
FROM category c JOIN product p ON c.category_id=p.category_id
|
||||
UNION ALL
|
||||
SELECT c.category_id, c.name, c.parent, cte.prod_name
|
||||
FROM cte JOIN category c ON c.category_id=cte.parent
|
||||
)
|
||||
SELECT cat_name, COUNT(*) AS prod_in_cat FROM cte
|
||||
GROUP BY cat_name;
|
||||
+----------------------+-------------+
|
||||
| cat_name | prod_in_cat |
|
||||
+----------------------+-------------+
|
||||
| ELECTRONICS | 10 |
|
||||
| TELEVISIONS | 4 |
|
||||
| TUBE | 1 |
|
||||
| LCD | 1 |
|
||||
| PLASMA | 1 |
|
||||
| PORTABLE ELECTRONICS | 5 |
|
||||
| MP3 PLAYERS | 2 |
|
||||
| FLASH | 1 |
|
||||
| CD PLAYERS | 1 |
|
||||
| 2 WAY RADIOS | 1 |
|
||||
+----------------------+-------------+
|
||||
|
||||
|
||||
################################################################################################
|
||||
### PART 4 depth-first or breadth-first traversal, transitive closure, cycle avoidance
|
||||
################################################################################################
|
||||
|
||||
#Depth-first or breadth-first
|
||||
|
||||
CREATE TABLE tree (person CHAR(20), parent CHAR(20));
|
||||
INSERT INTO tree VALUES
|
||||
('Robert I', NULL),
|
||||
('Thurimbert', 'Robert I'),
|
||||
('Robert II', 'Thurimbert'),
|
||||
('Cancor', 'Thurimbert'),
|
||||
('Landrade', 'Thurimbert'),
|
||||
('Ingramm', 'Thurimbert'),
|
||||
('Robert III', 'Robert II'),
|
||||
('Chaudegrand', 'Landrade'),
|
||||
('Ermengarde', 'Ingramm');
|
||||
|
||||
WITH RECURSIVE descendants AS
|
||||
(
|
||||
SELECT person
|
||||
FROM tree
|
||||
WHERE person='Thurimbert'
|
||||
UNION ALL
|
||||
SELECT t.person
|
||||
FROM descendants d, tree t
|
||||
WHERE t.parent=d.person
|
||||
)
|
||||
SELECT * FROM descendants;
|
||||
+-------------+
|
||||
| person |
|
||||
+-------------+
|
||||
| Thurimbert |
|
||||
| Ingramm |
|
||||
| Landrade |
|
||||
| Cancor |
|
||||
| Robert II |
|
||||
| Ermengarde |
|
||||
| Chaudegrand |
|
||||
| Robert III |
|
||||
+-------------+
|
||||
|
||||
WITH RECURSIVE descendants AS
|
||||
(
|
||||
SELECT person, 1 as level
|
||||
FROM tree
|
||||
WHERE person='Thurimbert'
|
||||
UNION ALL
|
||||
SELECT t.person, d.level+1
|
||||
FROM descendants d, tree t
|
||||
WHERE t.parent=d.person
|
||||
)
|
||||
SELECT * FROM descendants ORDER BY level;
|
||||
+-------------+-------+
|
||||
| person | level |
|
||||
+-------------+-------+
|
||||
| Thurimbert | 1 |
|
||||
| Ingramm | 2 |
|
||||
| Landrade | 2 |
|
||||
| Cancor | 2 |
|
||||
| Robert II | 2 |
|
||||
| Ermengarde | 3 |
|
||||
| Chaudegrand | 3 |
|
||||
| Robert III | 3 |
|
||||
+-------------+-------+
|
||||
|
||||
WITH RECURSIVE descendants AS
|
||||
(
|
||||
SELECT person, CAST(person AS CHAR(500)) AS path
|
||||
FROM tree
|
||||
WHERE person='Thurimbert'
|
||||
UNION ALL
|
||||
SELECT t.person, CONCAT(d.path, ',', t.person)
|
||||
FROM descendants d, tree t
|
||||
WHERE t.parent=d.person
|
||||
)
|
||||
SELECT * FROM descendants ORDER BY path;
|
||||
+-------------+---------------------------------+
|
||||
| person | path |
|
||||
+-------------+---------------------------------+
|
||||
| Thurimbert | Thurimbert |
|
||||
| Cancor | Thurimbert,Cancor |
|
||||
| Ingramm | Thurimbert,Ingramm |
|
||||
| Ermengarde | Thurimbert,Ingramm,Ermengarde |
|
||||
| Landrade | Thurimbert,Landrade |
|
||||
| Chaudegrand | Thurimbert,Landrade,Chaudegrand |
|
||||
| Robert II | Thurimbert,Robert II |
|
||||
| Robert III | Thurimbert,Robert II,Robert III |
|
||||
+-------------+---------------------------------+
|
||||
|
||||
#Computing transitive closures with simple cycle avoidance
|
||||
|
||||
CREATE TABLE rockets
|
||||
(origin CHAR(20), destination CHAR(20), trip_time INT);
|
||||
INSERT INTO rockets VALUES
|
||||
('Earth', 'Mars', 2),
|
||||
('Mars', 'Jupiter', 3),
|
||||
('Jupiter', 'Saturn', 4);
|
||||
|
||||
WITH RECURSIVE all_destinations AS
|
||||
(
|
||||
SELECT destination AS planet
|
||||
FROM rockets
|
||||
WHERE origin='Earth'
|
||||
UNION ALL
|
||||
SELECT r.destination
|
||||
FROM rockets r, all_destinations d
|
||||
WHERE r.origin=d.planet
|
||||
)
|
||||
SELECT * FROM all_destinations;
|
||||
+---------+
|
||||
| planet |
|
||||
+---------+
|
||||
| Mars |
|
||||
| Jupiter |
|
||||
| Saturn |
|
||||
+---------+
|
||||
|
||||
INSERT INTO rockets VALUES ('Saturn', 'Earth', 9);
|
||||
|
||||
WITH RECURSIVE all_destinations AS
|
||||
(
|
||||
SELECT destination AS planet
|
||||
FROM rockets
|
||||
WHERE origin='Earth'
|
||||
UNION ALL
|
||||
SELECT r.destination
|
||||
FROM rockets r, all_destinations d
|
||||
WHERE r.origin=d.planet
|
||||
)
|
||||
SELECT * FROM all_destinations;
|
||||
ERROR 5746 (HY000): cycle detected while executing recursive WITH query
|
||||
|
||||
#More complex cycle avoidance
|
||||
|
||||
WITH RECURSIVE all_destinations AS
|
||||
(
|
||||
SELECT destination AS planet, trip_time AS total_time,
|
||||
CAST(destination AS CHAR(500)) AS path
|
||||
FROM rockets
|
||||
WHERE origin='Earth'
|
||||
UNION ALL
|
||||
SELECT r.destination, d.total_time+r.trip_time,
|
||||
CONCAT(d.path, ',', r.destination)
|
||||
FROM rockets r, all_destinations d
|
||||
WHERE r.origin=d.planet
|
||||
AND FIND_IN_SET(r.destination, d.path)=0
|
||||
)
|
||||
SELECT * FROM all_destinations;
|
||||
|
||||
+---------+------------+---------------------------+
|
||||
| planet | total_time | path |
|
||||
+---------+------------+---------------------------+
|
||||
| Mars | 2 | Mars |
|
||||
| Jupiter | 5 | Mars,Jupiter |
|
||||
| Saturn | 9 | Mars,Jupiter,Saturn |
|
||||
| Earth | 18 | Mars,Jupiter,Saturn,Earth |
|
||||
+---------+------------+---------------------------+
|
||||
|
||||
WITH RECURSIVE all_destinations AS
|
||||
(
|
||||
SELECT destination AS planet, trip_time AS total_time,
|
||||
CAST(destination AS CHAR(500)) AS path, 0 AS is_cycle
|
||||
FROM rockets
|
||||
WHERE origin='Earth'
|
||||
UNION ALL
|
||||
SELECT r.destination, d.total_time+r.trip_time,
|
||||
CONCAT(d.path, ',', r.destination),
|
||||
FIND_IN_SET(r.destination, d.path)!=0
|
||||
FROM rockets r, all_destinations d
|
||||
WHERE r.origin=d.planet
|
||||
AND is_cycle=0
|
||||
)
|
||||
SELECT * FROM all_destinations;
|
||||
+---------+------------+--------------------------------+----------+
|
||||
| planet | total_time | path | is_cycle |
|
||||
+---------+------------+--------------------------------+----------+
|
||||
| Mars | 2 | Mars | 0 |
|
||||
| Jupiter | 5 | Mars,Jupiter | 0 |
|
||||
| Saturn | 9 | Mars,Jupiter,Saturn | 0 |
|
||||
| Earth | 18 | Mars,Jupiter,Saturn,Earth | 0 |
|
||||
| Mars | 20 | Mars,Jupiter,Saturn,Earth,Mars | 1 |
|
||||
+---------+------------+--------------------------------+----------+
|
||||
|
||||
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
@ -0,0 +1,14 @@
|
||||
with cte1(c1, c2) as
|
||||
(select 1, '0' from dual
|
||||
union all select 2, '1' from dual
|
||||
),
|
||||
cte2(c1, c2) as
|
||||
(select '0', 1 from dual
|
||||
union all select cte1.c2, cte1.c1 from cte2, cte1 where 10 = cte2.c1)
|
||||
select * from cte1;
|
||||
+------+------+
|
||||
| c1 | c2 |
|
||||
+------+------+
|
||||
| 1 | 0 |
|
||||
| 2 | 1 |
|
||||
+------+------+
|
||||
@ -0,0 +1,447 @@
|
||||
drop table EMP,DEPT,emp1,emp2;
|
||||
create table EMP (
|
||||
EMPno number,
|
||||
ENAME varchar(30),
|
||||
JOB varchar(30),
|
||||
MGR number(4),
|
||||
HIREDATE date,
|
||||
SAL number(7,2),
|
||||
COMM number(7,2),
|
||||
DEPTNO number(2)
|
||||
) ;
|
||||
|
||||
create table DEPT(
|
||||
DEPTNO number(2),
|
||||
DNAME(45),
|
||||
LOC varchar(39)
|
||||
) ;
|
||||
|
||||
CREATE TABLE emp1 (
|
||||
empno VARCHAR(4000) NOT NULL,
|
||||
ename VARCHAR(14),
|
||||
job VARCHAR(9),
|
||||
mgr VARCHAR(4000),
|
||||
hiredate DATE,
|
||||
sal NUMBER(7,2),
|
||||
comm NUMBER(7,2),
|
||||
deptno NUMBER(2));
|
||||
|
||||
CREATE TABLE emp2 (
|
||||
empno VARCHAR(4000) NOT NULL,
|
||||
ename VARCHAR(14),
|
||||
job VARCHAR(9),
|
||||
mgr VARCHAR(4000),
|
||||
hiredate DATE,
|
||||
sal NUMBER(7,2),
|
||||
comm NUMBER(7,2),
|
||||
deptno NUMBER(2));
|
||||
|
||||
insert into EMP values (7369,'SMITH','CLERK',7902, str_to_date('1980-12-17','%Y-%m-%d'),800,NULL, 20) ;
|
||||
INSERT INTO EMP VALUES (7499, 'ALLEN','SALESMAN',7698,str_to_date('1981-02-20','%Y-%m-%d'),1600,300,30) ;
|
||||
INSERT INTO EMP VALUES (7521,'WARD','SALESMAN',7698, str_to_date('1981-02-22','%Y-%m-%d'),1250, 500, 30) ;
|
||||
INSERT INTO EMP VALUES (7566,'JONES','MANAGER',7839, str_to_date('1981-08-02','%Y-%m-%d'), 2975, NULL, 20) ;
|
||||
INSERT INTO EMP VALUES (7654,'MARTIN','SALESMAN', 7698, str_to_date('1981-09-28','%Y-%m-%d'), 1250, 1400, 30) ;
|
||||
INSERT INTO EMP VALUES (7698, 'BLAKE','MANAGER', 7839, str_to_date('1981-05-01','%Y-%m-%d'), 2850, NULL, 30) ;
|
||||
INSERT INTO EMP VALUES (7782, 'CLARK','MANAGER', 7839, str_to_date('1981-06-09','%Y-%m-%d'), 2450, NULL, 10) ;
|
||||
insert into EMP values (7788,'SCOTT','ANALYST', 7566, str_to_date('1987-08-19','%Y-%m-%d'), 3000, null, 20) ;
|
||||
INSERT INTO EMP VALUES (7839, 'KING','PRESIDENT', NULL, str_to_date('1981-11-17','%Y-%m-%d'), 5000, NULL, 10) ;
|
||||
INSERT INTO EMP VALUES (7844, 'TURNER','SALESMAN', 7698, str_to_date('1981-09-08','%Y-%m-%d'), 1500, 0, 30) ;
|
||||
INSERT INTO EMP VALUES(7876, 'ADAMS','CLERK', 7788, str_to_date('1987-05-23','%Y-%m-%d'), 1100, NULL, 20) ;
|
||||
INSERT INTO EMP VALUES(7900, 'JAMES', 'CLEARK', 7698, str_to_date('1981-12-03','%Y-%m-%d'), 950, NULL, 30) ;
|
||||
INSERT INTO EMP VALUES(7902, 'FORD','ANALYST',7566, str_to_date('1981-12-03','%Y-%m-%d'), 3000, NULL, 20) ;
|
||||
INSERT INTO EMP VALUES(7934,'MILLER','CLERK', 7782, str_to_date('1982-06-23','%Y-%m-%d'), 1300,NULL, 10) ;
|
||||
|
||||
|
||||
INSERT INTO emp1 values (7369, 'SMITH', 'CLERK', 7902, str_to_date('1980-12-17', '%Y-%m-%d'), 800, null, 20);
|
||||
INSERT INTO emp1 values (7499, 'ALLEN', 'SALESMAN', 7698, str_to_date('1981-02-20', '%Y-%m-%d'), 1600, 300, 30);
|
||||
INSERT INTO emp1 values (7521, 'WARD', 'SALESMAN', 7698, str_to_date('1981-02-22', '%Y-%m-%d'), 1250, 500, 30);
|
||||
INSERT INTO emp1 values (7566, 'JONES', 'MANAGER', 7839, str_to_date('1981-08-02', '%Y-%m-%d'), 2975, null, 20);
|
||||
INSERT INTO emp1 values (7654, 'MARTIN', 'SALESMAN', 7698, str_to_date('1981-09-28', '%Y-%m-%d'), 1250, 1400, 30);
|
||||
INSERT INTO emp1 values (7698, 'BLAKE', 'MANAGER', 7839, str_to_date('1981-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (7782, 'CLARK', 'MANAGER', 7839, str_to_date('1981-06-09' , '%Y-%m-%d'), 2450, null, 10);
|
||||
INSERT INTO emp1 values (7788, 'SCOTT', 'ANALYST', 7566, str_to_date('1987-08-19', '%Y-%m-%d'), 3000, null, 20);
|
||||
INSERT INTO emp1 values (7839, 'KING', 'PRESIDENT', null, str_to_date('1981-11-17', '%Y-%m-%d'), 5000, null, 10);
|
||||
INSERT INTO emp1 values (7844, 'TURNER', 'SALESMAN', 7698, str_to_date('1981-09-08', '%Y-%m-%d'), 1500, 0, 30);
|
||||
INSERT INTO emp1 values (7876, 'ADAMS', 'CLERK', 7788, str_to_date('1987-05-23', '%Y-%m-%d'), 1100, null, 20);
|
||||
INSERT INTO emp1 values (7900, 'JAMES', 'CLERK', 7698, str_to_date('1981-12-03', '%Y-%m-%d'), 950, null, 30);
|
||||
INSERT INTO emp1 values (7902, 'FORD', 'ANALYST', 7566, str_to_date('1981-12-03', '%Y-%m-%d'), 3000, null, 20);
|
||||
INSERT INTO emp1 values (7934, 'MILLER', 'CLERK', 7782, str_to_date('1982-01-23', '%Y-%m-%d'), 1300, null, 10);
|
||||
INSERT INTO emp1 values (LPAD('8100',400,'5'), 'Eve', 'MANAGER', 7839, str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8101',3000,'5'), 'Eve1', 'MANAGER', LPAD('8100',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8102',3000,'5'), 'Eve2', 'MANAGER', LPAD('8101',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8103',3000,'5'), 'Eve3', 'MANAGER', LPAD('8102',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8104',3000,'5'), 'Eve4', 'MANAGER', LPAD('8103',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8105',3000,'5'), 'Eve5', 'MANAGER', LPAD('8104',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8106',3000,'5'), 'Eve6', 'MANAGER', LPAD('8105',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8107',400,'5'), 'Eve7', 'MANAGER', LPAD('8106',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8108',400,'5'), 'Eve8', 'MANAGER', LPAD('8107',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8109',400,'5'), 'Eve9', 'MANAGER', LPAD('8108',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8110',400,'5'), 'Eve10', 'MANAGER', LPAD('8109',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8111',400,'5'), 'Eve11', 'MANAGER', LPAD('8110',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8112',400,'5'), 'Eve12', 'MANAGER', LPAD('8111',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8113',400,'5'), 'Eve13', 'MANAGER', LPAD('8112',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8114',400,'5'), 'Eve14', 'MANAGER', LPAD('8113',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8115',400,'5'), 'Eve15', 'MANAGER', LPAD('8114',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8116',400,'5'), 'Eve16', 'MANAGER', LPAD('8115',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8117',400,'5'), 'Eve17', 'MANAGER', LPAD('8116',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8118',400,'5'), 'Eve18', 'MANAGER', LPAD('8117',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8119',400,'5'), 'Eve19', 'CLERK', LPAD('8118',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
|
||||
INSERT INTO emp2 values (4002, 'SMITH', 'CLERK', 5002, str_to_date('1980-12-17', '%Y-%m-%d'), 800, null, 20);
|
||||
INSERT INTO emp2 values (5003, 'ALLEN', 'SALESMAN', 6002, str_to_date('1981-02-20', '%Y-%m-%d'), 1600, 300, 30);
|
||||
INSERT INTO emp2 values (5004, 'WARD', 'SALESMAN', 6002, str_to_date('1981-02-22', '%Y-%m-%d'), 1250, 500, 30);
|
||||
INSERT INTO emp2 values (6001, 'JONES', 'MANAGER', 7839, str_to_date('1981-08-02', '%Y-%m-%d'), 2975, null, 20);
|
||||
INSERT INTO emp2 values (5005, 'MARTIN', 'SALESMAN', 6002, str_to_date('1981-09-28', '%Y-%m-%d'), 1250, 1400, 30);
|
||||
INSERT INTO emp2 values (6002, 'BLAKE', 'MANAGER', 7839, str_to_date('1981-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp2 values (6003, 'CLARK', 'MANAGER', 7839, str_to_date('1981-06-09' , '%Y-%m-%d'), 2450, null, 10);
|
||||
INSERT INTO emp2 values (5001, 'SCOTT', 'ANALYST', 6001, str_to_date('1987-08-19', '%Y-%m-%d'), 3000, null, 20);
|
||||
INSERT INTO emp2 values (7839, 'KING', 'PRESIDENT', null, str_to_date('1987-11-17', '%Y-%m-%d'), 5000, null, 10);
|
||||
INSERT INTO emp2 values (5006, 'TURNER', 'SALESMAN', 6002, str_to_date('1981-09-08', '%Y-%m-%d'), 1500, 0, 30);
|
||||
INSERT INTO emp2 values (4001, 'ADAMS', 'CLERK', 5001, str_to_date('1987-05-23', '%Y-%m-%d'), 1100, null, 20);
|
||||
INSERT INTO emp2 values (5007, 'JAMES', 'CLERK', 6002, str_to_date('1981-12-03', '%Y-%m-%d'), 950, null, 30);
|
||||
INSERT INTO emp2 values (5002, 'FORD', 'ANALYST', 6001, str_to_date('1981-12-03', '%Y-%m-%d'), 3000, null, 20);
|
||||
INSERT INTO emp2 values (5008, 'MILLER', 'CLERK', 6003, str_to_date('1982-01-23', '%Y-%m-%d'), 1300, null, 10);
|
||||
|
||||
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 1:
|
||||
## - recursive WITH Query: no cycle clause used in query in acyclic data
|
||||
## =======================================================================
|
||||
|
||||
|
||||
WITH rw (ename, mgr, empno) AS
|
||||
(
|
||||
SELECT ename, mgr, empno
|
||||
FROM emp e
|
||||
WHERE job = 'PRESIDENT'
|
||||
UNION ALL
|
||||
SELECT e.ename, e.mgr, e.empno
|
||||
FROM rw r, emp e
|
||||
WHERE r.empno = e.mgr
|
||||
)
|
||||
SELECT ename, empno, mgr
|
||||
FROM rw;
|
||||
+--------+-------+------+
|
||||
| ename | empno | mgr |
|
||||
+--------+-------+------+
|
||||
| KING | 7839 | NULL |
|
||||
| CLARK | 7782 | 7839 |
|
||||
| BLAKE | 7698 | 7839 |
|
||||
| JONES | 7566 | 7839 |
|
||||
| MILLER | 7934 | 7782 |
|
||||
| JAMES | 7900 | 7698 |
|
||||
| TURNER | 7844 | 7698 |
|
||||
| MARTIN | 7654 | 7698 |
|
||||
| WARD | 7521 | 7698 |
|
||||
| ALLEN | 7499 | 7698 |
|
||||
| FORD | 7902 | 7566 |
|
||||
| SCOTT | 7788 | 7566 |
|
||||
| SMITH | 7369 | 7902 |
|
||||
| ADAMS | 7876 | 7788 |
|
||||
+--------+-------+------+
|
||||
|
||||
|
||||
update emp set mgr = 7788 where ename = 'KING';
|
||||
|
||||
drop table emp1;
|
||||
drop table emp2;
|
||||
|
||||
CREATE TABLE emp1 (
|
||||
empno VARCHAR(4000) NOT NULL,
|
||||
ename VARCHAR(14),
|
||||
job VARCHAR(9),
|
||||
mgr VARCHAR(4000),
|
||||
hiredate DATE,
|
||||
sal NUMBER(7,2),
|
||||
comm NUMBER(7,2),
|
||||
deptno NUMBER(2));
|
||||
|
||||
CREATE TABLE emp2 (
|
||||
empno VARCHAR(4000) NOT NULL,
|
||||
ename VARCHAR(14),
|
||||
job VARCHAR(9),
|
||||
mgr VARCHAR(4000),
|
||||
hiredate DATE,
|
||||
sal NUMBER(7,2),
|
||||
comm NUMBER(7,2),
|
||||
deptno NUMBER(2));
|
||||
|
||||
INSERT INTO emp1 values (7369, 'SMITH', 'CLERK', 7902, str_to_date('1980-12-17', '%Y-%m-%d'), 800, null, 20);
|
||||
INSERT INTO emp1 values (7499, 'ALLEN', 'SALESMAN', 7698, str_to_date('1981-02-20', '%Y-%m-%d'), 1600, 300, 30);
|
||||
INSERT INTO emp1 values (7521, 'WARD', 'SALESMAN', 7698, str_to_date('1981-02-22', '%Y-%m-%d'), 1250, 500, 30);
|
||||
INSERT INTO emp1 values (7566, 'JONES', 'MANAGER', 7839, str_to_date('1981-08-02', '%Y-%m-%d'), 2975, null, 20);
|
||||
INSERT INTO emp1 values (7654, 'MARTIN', 'SALESMAN', 7698, str_to_date('1981-09-28', '%Y-%m-%d'), 1250, 1400, 30);
|
||||
INSERT INTO emp1 values (7698, 'BLAKE', 'MANAGER', 7839, str_to_date('1981-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (7782, 'CLARK', 'MANAGER', 7839, str_to_date('1981-06-09' , '%Y-%m-%d'), 2450, null, 10);
|
||||
INSERT INTO emp1 values (7788, 'SCOTT', 'ANALYST', 7566, str_to_date('1987-08-19', '%Y-%m-%d'), 3000, null, 20);
|
||||
INSERT INTO emp1 values (7839, 'KING', 'PRESIDENT', null, str_to_date('1981-11-17', '%Y-%m-%d'), 5000, null, 10);
|
||||
INSERT INTO emp1 values (7844, 'TURNER', 'SALESMAN', 7698, str_to_date('1981-09-08', '%Y-%m-%d'), 1500, 0, 30);
|
||||
INSERT INTO emp1 values (7876, 'ADAMS', 'CLERK', 7788, str_to_date('1987-05-23', '%Y-%m-%d'), 1100, null, 20);
|
||||
INSERT INTO emp1 values (7900, 'JAMES', 'CLERK', 7698, str_to_date('1981-12-03', '%Y-%m-%d'), 950, null, 30);
|
||||
INSERT INTO emp1 values (7902, 'FORD', 'ANALYST', 7566, str_to_date('1981-12-03', '%Y-%m-%d'), 3000, null, 20);
|
||||
INSERT INTO emp1 values (7934, 'MILLER', 'CLERK', 7782, str_to_date('1982-01-23', '%Y-%m-%d'), 1300, null, 10);
|
||||
INSERT INTO emp1 values (LPAD('8100',400,'5'), 'Eve', 'MANAGER', 7839, str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8101',3000,'5'), 'Eve1', 'MANAGER', LPAD('8100',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8102',3000,'5'), 'Eve2', 'MANAGER', LPAD('8101',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8103',3000,'5'), 'Eve3', 'MANAGER', LPAD('8102',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8104',3000,'5'), 'Eve4', 'MANAGER', LPAD('8103',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8105',3000,'5'), 'Eve5', 'MANAGER', LPAD('8104',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8106',3000,'5'), 'Eve6', 'MANAGER', LPAD('8105',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8107',400,'5'), 'Eve7', 'MANAGER', LPAD('8106',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8108',400,'5'), 'Eve8', 'MANAGER', LPAD('8107',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8109',400,'5'), 'Eve9', 'MANAGER', LPAD('8108',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8110',400,'5'), 'Eve10', 'MANAGER', LPAD('8109',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8111',400,'5'), 'Eve11', 'MANAGER', LPAD('8110',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8112',400,'5'), 'Eve12', 'MANAGER', LPAD('8111',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8113',400,'5'), 'Eve13', 'MANAGER', LPAD('8112',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8114',400,'5'), 'Eve14', 'MANAGER', LPAD('8113',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8115',400,'5'), 'Eve15', 'MANAGER', LPAD('8114',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8116',400,'5'), 'Eve16', 'MANAGER', LPAD('8115',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8117',400,'5'), 'Eve17', 'MANAGER', LPAD('8116',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8118',400,'5'), 'Eve18', 'MANAGER', LPAD('8117',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8119',400,'5'), 'Eve19', 'CLERK', LPAD('8118',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
|
||||
INSERT INTO emp2 values (4002, 'SMITH', 'CLERK', 5002, str_to_date('1980-12-17', '%Y-%m-%d'), 800, null, 20);
|
||||
INSERT INTO emp2 values (5003, 'ALLEN', 'SALESMAN', 6002, str_to_date('1981-02-20', '%Y-%m-%d'), 1600, 300, 30);
|
||||
INSERT INTO emp2 values (5004, 'WARD', 'SALESMAN', 6002, str_to_date('1981-02-22', '%Y-%m-%d'), 1250, 500, 30);
|
||||
INSERT INTO emp2 values (6001, 'JONES', 'MANAGER', 7839, str_to_date('1981-08-02', '%Y-%m-%d'), 2975, null, 20);
|
||||
INSERT INTO emp2 values (5005, 'MARTIN', 'SALESMAN', 6002, str_to_date('1981-09-28', '%Y-%m-%d'), 1250, 1400, 30);
|
||||
INSERT INTO emp2 values (6002, 'BLAKE', 'MANAGER', 7839, str_to_date('1981-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp2 values (6003, 'CLARK', 'MANAGER', 7839, str_to_date('1981-06-09' , '%Y-%m-%d'), 2450, null, 10);
|
||||
INSERT INTO emp2 values (5001, 'SCOTT', 'ANALYST', 6001, str_to_date('1987-08-19', '%Y-%m-%d'), 3000, null, 20);
|
||||
INSERT INTO emp2 values (7839, 'KING', 'PRESIDENT', null, str_to_date('1987-11-17', '%Y-%m-%d'), 5000, null, 10);
|
||||
INSERT INTO emp2 values (5006, 'TURNER', 'SALESMAN', 6002, str_to_date('1981-09-08', '%Y-%m-%d'), 1500, 0, 30);
|
||||
INSERT INTO emp2 values (4001, 'ADAMS', 'CLERK', 5001, str_to_date('1987-05-23', '%Y-%m-%d'), 1100, null, 20);
|
||||
INSERT INTO emp2 values (5007, 'JAMES', 'CLERK', 6002, str_to_date('1981-12-03', '%Y-%m-%d'), 950, null, 30);
|
||||
INSERT INTO emp2 values (5002, 'FORD', 'ANALYST', 6001, str_to_date('1981-12-03', '%Y-%m-%d'), 3000, null, 20);
|
||||
INSERT INTO emp2 values (5008, 'MILLER', 'CLERK', 6003, str_to_date('1982-01-23', '%Y-%m-%d'), 1300, null, 10);
|
||||
|
||||
--enable_warnings
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 2:
|
||||
## - recursive WITH Query(Negative): cycle clause not used in query with
|
||||
## cyclic data
|
||||
## =======================================================================
|
||||
|
||||
/* add loop from scott back to king in emp */
|
||||
update emp set mgr = 7788 where ename = 'KING';
|
||||
|
||||
WITH rw (ename, mgr, empno) AS
|
||||
(
|
||||
SELECT ename, mgr, empno
|
||||
FROM emp e
|
||||
WHERE job = 'PRESIDENT'
|
||||
UNION ALL
|
||||
SELECT e.ename, e.mgr, e.empno
|
||||
FROM rw r, emp e
|
||||
WHERE r.empno = e.mgr
|
||||
)
|
||||
SELECT ename, empno, mgr
|
||||
FROM rw;
|
||||
ERROR 5746 (HY000): cycle detected while executing recursive WITH query
|
||||
|
||||
|
||||
drop table emp1;
|
||||
drop table emp2;
|
||||
|
||||
CREATE TABLE emp1 (
|
||||
empno VARCHAR(4000) NOT NULL,
|
||||
ename VARCHAR(14),
|
||||
job VARCHAR(9),
|
||||
mgr VARCHAR(4000),
|
||||
hiredate DATE,
|
||||
sal NUMBER(7,2),
|
||||
comm NUMBER(7,2),
|
||||
deptno NUMBER(2));
|
||||
|
||||
CREATE TABLE emp2 (
|
||||
empno VARCHAR(4000) NOT NULL,
|
||||
ename VARCHAR(14),
|
||||
job VARCHAR(9),
|
||||
mgr VARCHAR(4000),
|
||||
hiredate DATE,
|
||||
sal NUMBER(7,2),
|
||||
comm NUMBER(7,2),
|
||||
deptno NUMBER(2));
|
||||
|
||||
INSERT INTO emp1 values (7369, 'SMITH', 'CLERK', 7902, str_to_date('1980-12-17', '%Y-%m-%d'), 800, null, 20);
|
||||
INSERT INTO emp1 values (7499, 'ALLEN', 'SALESMAN', 7698, str_to_date('1981-02-20', '%Y-%m-%d'), 1600, 300, 30);
|
||||
INSERT INTO emp1 values (7521, 'WARD', 'SALESMAN', 7698, str_to_date('1981-02-22', '%Y-%m-%d'), 1250, 500, 30);
|
||||
INSERT INTO emp1 values (7566, 'JONES', 'MANAGER', 7839, str_to_date('1981-08-02', '%Y-%m-%d'), 2975, null, 20);
|
||||
INSERT INTO emp1 values (7654, 'MARTIN', 'SALESMAN', 7698, str_to_date('1981-09-28', '%Y-%m-%d'), 1250, 1400, 30);
|
||||
INSERT INTO emp1 values (7698, 'BLAKE', 'MANAGER', 7839, str_to_date('1981-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (7782, 'CLARK', 'MANAGER', 7839, str_to_date('1981-06-09' , '%Y-%m-%d'), 2450, null, 10);
|
||||
INSERT INTO emp1 values (7788, 'SCOTT', 'ANALYST', 7566, str_to_date('1987-08-19', '%Y-%m-%d'), 3000, null, 20);
|
||||
INSERT INTO emp1 values (7839, 'KING', 'PRESIDENT', null, str_to_date('1981-11-17', '%Y-%m-%d'), 5000, null, 10);
|
||||
INSERT INTO emp1 values (7844, 'TURNER', 'SALESMAN', 7698, str_to_date('1981-09-08', '%Y-%m-%d'), 1500, 0, 30);
|
||||
INSERT INTO emp1 values (7876, 'ADAMS', 'CLERK', 7788, str_to_date('1987-05-23', '%Y-%m-%d'), 1100, null, 20);
|
||||
INSERT INTO emp1 values (7900, 'JAMES', 'CLERK', 7698, str_to_date('1981-12-03', '%Y-%m-%d'), 950, null, 30);
|
||||
INSERT INTO emp1 values (7902, 'FORD', 'ANALYST', 7566, str_to_date('1981-12-03', '%Y-%m-%d'), 3000, null, 20);
|
||||
INSERT INTO emp1 values (7934, 'MILLER', 'CLERK', 7782, str_to_date('1982-01-23', '%Y-%m-%d'), 1300, null, 10);
|
||||
INSERT INTO emp1 values (LPAD('8100',400,'5'), 'Eve', 'MANAGER', 7839, str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8101',3000,'5'), 'Eve1', 'MANAGER', LPAD('8100',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8102',3000,'5'), 'Eve2', 'MANAGER', LPAD('8101',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8103',3000,'5'), 'Eve3', 'MANAGER', LPAD('8102',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8104',3000,'5'), 'Eve4', 'MANAGER', LPAD('8103',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8105',3000,'5'), 'Eve5', 'MANAGER', LPAD('8104',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8106',3000,'5'), 'Eve6', 'MANAGER', LPAD('8105',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8107',400,'5'), 'Eve7', 'MANAGER', LPAD('8106',3000,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8108',400,'5'), 'Eve8', 'MANAGER', LPAD('8107',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8109',400,'5'), 'Eve9', 'MANAGER', LPAD('8108',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8110',400,'5'), 'Eve10', 'MANAGER', LPAD('8109',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8111',400,'5'), 'Eve11', 'MANAGER', LPAD('8110',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8112',400,'5'), 'Eve12', 'MANAGER', LPAD('8111',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8113',400,'5'), 'Eve13', 'MANAGER', LPAD('8112',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8114',400,'5'), 'Eve14', 'MANAGER', LPAD('8113',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8115',400,'5'), 'Eve15', 'MANAGER', LPAD('8114',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8116',400,'5'), 'Eve16', 'MANAGER', LPAD('8115',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8117',400,'5'), 'Eve17', 'MANAGER', LPAD('8116',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8118',400,'5'), 'Eve18', 'MANAGER', LPAD('8117',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (LPAD('8119',400,'5'), 'Eve19', 'CLERK', LPAD('8118',400,'5'), str_to_date('1984-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
|
||||
INSERT INTO emp2 values (4002, 'SMITH', 'CLERK', 5002, str_to_date('1980-12-17', '%Y-%m-%d'), 800, null, 20);
|
||||
INSERT INTO emp2 values (5003, 'ALLEN', 'SALESMAN', 6002, str_to_date('1981-02-20', '%Y-%m-%d'), 1600, 300, 30);
|
||||
INSERT INTO emp2 values (5004, 'WARD', 'SALESMAN', 6002, str_to_date('1981-02-22', '%Y-%m-%d'), 1250, 500, 30);
|
||||
INSERT INTO emp2 values (6001, 'JONES', 'MANAGER', 7839, str_to_date('1981-08-02', '%Y-%m-%d'), 2975, null, 20);
|
||||
INSERT INTO emp2 values (5005, 'MARTIN', 'SALESMAN', 6002, str_to_date('1981-09-28', '%Y-%m-%d'), 1250, 1400, 30);
|
||||
INSERT INTO emp2 values (6002, 'BLAKE', 'MANAGER', 7839, str_to_date('1981-05-01', '%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp2 values (6003, 'CLARK', 'MANAGER', 7839, str_to_date('1981-06-09' , '%Y-%m-%d'), 2450, null, 10);
|
||||
INSERT INTO emp2 values (5001, 'SCOTT', 'ANALYST', 6001, str_to_date('1987-08-19', '%Y-%m-%d'), 3000, null, 20);
|
||||
INSERT INTO emp2 values (7839, 'KING', 'PRESIDENT', null, str_to_date('1987-11-17', '%Y-%m-%d'), 5000, null, 10);
|
||||
INSERT INTO emp2 values (5006, 'TURNER', 'SALESMAN', 6002, str_to_date('1981-09-08', '%Y-%m-%d'), 1500, 0, 30);
|
||||
INSERT INTO emp2 values (4001, 'ADAMS', 'CLERK', 5001, str_to_date('1987-05-23', '%Y-%m-%d'), 1100, null, 20);
|
||||
INSERT INTO emp2 values (5007, 'JAMES', 'CLERK', 6002, str_to_date('1981-12-03', '%Y-%m-%d'), 950, null, 30);
|
||||
INSERT INTO emp2 values (5002, 'FORD', 'ANALYST', 6001, str_to_date('1981-12-03', '%Y-%m-%d'), 3000, null, 20);
|
||||
INSERT INTO emp2 values (5008, 'MILLER', 'CLERK', 6003, str_to_date('1982-01-23', '%Y-%m-%d'), 1300, null, 10);
|
||||
|
||||
|
||||
update emp2 set mgr = 5001 where ename = 'KING';
|
||||
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 3:
|
||||
## - recursive WITH Query: Cycle Pruning with Cycle clause not used in the query
|
||||
## Pruning predicate added that results in no cycles e.mgr < e.empno
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (ename, mgr, empno) AS
|
||||
(
|
||||
SELECT ename, mgr, empno
|
||||
FROM emp2 e
|
||||
WHERE job = 'PRESIDENT'
|
||||
UNION ALL
|
||||
SELECT e.ename, e.mgr, e.empno
|
||||
FROM rw r, emp2 e
|
||||
WHERE r.empno = e.mgr and e.mgr < e.empno
|
||||
)
|
||||
SELECT ename, empno, mgr
|
||||
FROM rw;
|
||||
+-------+-------+------+
|
||||
| ename | empno | mgr |
|
||||
+-------+-------+------+
|
||||
| KING | 7839 | 5001 |
|
||||
+-------+-------+------+
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 4:
|
||||
## - recursive WITH Query: Cycle Pruning with Cycle clause not used in the query
|
||||
## Pruning predicate added that results in no cycles e.mgr > e.empno
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (ename, mgr, empno) AS
|
||||
(
|
||||
SELECT ename, mgr, empno
|
||||
FROM emp2 e
|
||||
WHERE job = 'PRESIDENT'
|
||||
UNION ALL
|
||||
SELECT e.ename, e.mgr, e.empno
|
||||
FROM rw r, emp2 e
|
||||
WHERE r.empno = e.mgr and e.mgr > e.empno
|
||||
)
|
||||
SELECT ename, empno, mgr
|
||||
FROM rw;
|
||||
+--------+-------+------+
|
||||
| ename | empno | mgr |
|
||||
+--------+-------+------+
|
||||
| KING | 7839 | 5001 |
|
||||
| CLARK | 6003 | 7839 |
|
||||
| BLAKE | 6002 | 7839 |
|
||||
| JONES | 6001 | 7839 |
|
||||
| MILLER | 5008 | 6003 |
|
||||
| JAMES | 5007 | 6002 |
|
||||
| TURNER | 5006 | 6002 |
|
||||
| MARTIN | 5005 | 6002 |
|
||||
| WARD | 5004 | 6002 |
|
||||
| ALLEN | 5003 | 6002 |
|
||||
| FORD | 5002 | 6001 |
|
||||
| SCOTT | 5001 | 6001 |
|
||||
| SMITH | 4002 | 5002 |
|
||||
| ADAMS | 4001 | 5001 |
|
||||
+--------+-------+------+
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 5:
|
||||
## - recursive WITH Query: Cycle Pruning with Cycle clause not used in the query
|
||||
## Pruning predicate added that results in no cycles r.empno < e.empno
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (ename, mgr, empno) AS
|
||||
(
|
||||
SELECT ename, mgr, empno
|
||||
FROM emp2 e
|
||||
WHERE job = 'PRESIDENT'
|
||||
UNION ALL
|
||||
SELECT e.ename, e.mgr, e.empno
|
||||
FROM rw r, emp2 e
|
||||
WHERE r.empno = e.mgr and r.empno < e.empno
|
||||
)
|
||||
SELECT ename, empno, mgr
|
||||
FROM rw;
|
||||
+-------+-------+------+
|
||||
| ename | empno | mgr |
|
||||
+-------+-------+------+
|
||||
| KING | 7839 | 5001 |
|
||||
+-------+-------+------+
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 6:
|
||||
## - recursive WITH Query: Cycle Pruning with Cycle clause not used in the query
|
||||
## Pruning predicate added that results in no cycles r.empno > e.empno
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (ename, mgr, empno) AS
|
||||
(
|
||||
SELECT ename, mgr, empno
|
||||
FROM emp2 e
|
||||
WHERE job = 'PRESIDENT'
|
||||
UNION ALL
|
||||
SELECT e.ename, e.mgr, e.empno
|
||||
FROM rw r, emp2 e
|
||||
WHERE r.empno = e.mgr and r.empno > e.empno
|
||||
)
|
||||
SELECT ename, empno, mgr
|
||||
FROM rw;
|
||||
+--------+-------+------+
|
||||
| ename | empno | mgr |
|
||||
+--------+-------+------+
|
||||
| KING | 7839 | 5001 |
|
||||
| CLARK | 6003 | 7839 |
|
||||
| BLAKE | 6002 | 7839 |
|
||||
| JONES | 6001 | 7839 |
|
||||
| MILLER | 5008 | 6003 |
|
||||
| JAMES | 5007 | 6002 |
|
||||
| TURNER | 5006 | 6002 |
|
||||
| MARTIN | 5005 | 6002 |
|
||||
| WARD | 5004 | 6002 |
|
||||
| ALLEN | 5003 | 6002 |
|
||||
| FORD | 5002 | 6001 |
|
||||
| SCOTT | 5001 | 6001 |
|
||||
| SMITH | 4002 | 5002 |
|
||||
| ADAMS | 4001 | 5001 |
|
||||
+--------+-------+------+
|
||||
|
||||
|
||||
|
||||
|
||||
@ -0,0 +1,675 @@
|
||||
drop table EMP;
|
||||
create table EMP (
|
||||
EMPno number,
|
||||
ENAME VARCHAR(30),
|
||||
JOB VARCHAR(30),
|
||||
MGR number(4),
|
||||
HIREDATE date,
|
||||
SAL number(7,2),
|
||||
COMM number(7,2),
|
||||
DEPTNO number(2)
|
||||
) ;
|
||||
|
||||
INSERT INTO EMP values (7369,'SMITH','CLERK',7902, str_to_date('1980-12-17','%Y-%m-%d'),800,NULL, 20) ;
|
||||
INSERT INTO EMP VALUES (7499, 'ALLEN','SALESMAN',7698,str_to_date('1981-02-20','%Y-%m-%d'),1600,300,30) ;
|
||||
INSERT INTO EMP VALUES (7521,'WARD','SALESMAN',7698, str_to_date('1981-02-22','%Y-%m-%d'),1250, 500, 30) ;
|
||||
INSERT INTO EMP VALUES (7566,'JONES','MANAGER',7839, str_to_date('1981-08-02','%Y-%m-%d'), 2975, NULL, 20) ;
|
||||
INSERT INTO EMP VALUES (7654,'MARTIN','SALESMAN', 7698, str_to_date('1981-09-28','%Y-%m-%d'), 1250, 1400, 30) ;
|
||||
INSERT INTO EMP VALUES (7698, 'BLAKE','MANAGER', 7839, str_to_date('1981-05-01','%Y-%m-%d'), 2850, NULL, 30) ;
|
||||
INSERT INTO EMP VALUES (7782, 'CLARK','MANAGER', 7839, str_to_date('1981-06-09','%Y-%m-%d'), 2450, NULL, 10) ;
|
||||
insert into EMP values (7788,'SCOTT','ANALYST', 7566, str_to_date('1987-08-19','%Y-%m-%d'), 3000, null, 20) ;
|
||||
INSERT INTO EMP VALUES (7839, 'KING','PRESIDENT', NULL, str_to_date('1981-11-17','%Y-%m-%d'), 5000, NULL, 10) ;
|
||||
INSERT INTO EMP VALUES (7844, 'TURNER','SALESMAN', 7698, str_to_date('1981-09-08','%Y-%m-%d'), 1500, 0, 30) ;
|
||||
INSERT INTO EMP VALUES(7876, 'ADAMS','CLERK', 7788, str_to_date('1987-05-23','%Y-%m-%d'), 1100, NULL, 20) ;
|
||||
INSERT INTO EMP VALUES(7900, 'JAMES', 'CLEARK', 7698, str_to_date('1981-12-03','%Y-%m-%d'), 950, NULL, 30) ;
|
||||
INSERT INTO EMP VALUES(7902, 'FORD','ANALYST',7566, str_to_date('1981-12-03','%Y-%m-%d'), 3000, NULL, 20) ;
|
||||
INSERT INTO EMP VALUES(7934,'MILLER','CLERK', 7782, str_to_date('1982-01-23','%Y-%m-%d'), 1300,NULL, 10) ;
|
||||
|
||||
drop table emp1;
|
||||
CREATE TABLE emp1 (
|
||||
empno VARCHAR(4000) NOT NULL,
|
||||
ename VARCHAR(14),
|
||||
job VARCHAR(9),
|
||||
mgr VARCHAR(4000),
|
||||
hiredate DATE,
|
||||
sal NUMBER(7,2),
|
||||
comm NUMBER(7,2),
|
||||
deptno NUMBER(2));
|
||||
|
||||
INSERT INTO emp1 values (7369, 'SMITH', 'CLERK', 7902, str_to_date('1980-12-17',
|
||||
'%Y-%m-%d'), 800, null, 20);
|
||||
INSERT INTO emp1 values (7499, 'ALLEN', 'SALESMAN', 7698, str_to_date('1981-02-20', '%Y-%m-%d'), 1600, 300, 30);
|
||||
INSERT INTO emp1 values (7521, 'WARD', 'SALESMAN', 7698, str_to_date('1981-02-22',
|
||||
'%Y-%m-%d'), 1250, 500, 30);
|
||||
INSERT INTO emp1 values (7566, 'JONES', 'MANAGER', 7839, str_to_date('1981-08-02',
|
||||
'%Y-%m-%d'), 2975, null, 20);
|
||||
INSERT INTO emp1 values (7654, 'MARTIN', 'SALESMAN', 7698, str_to_date('1981-09-28', '%Y-%m-%d'), 1250, 1400, 30);
|
||||
INSERT INTO emp1 values (7698, 'BLAKE', 'MANAGER', 7839, str_to_date('1981-05-01',
|
||||
'%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (7782, 'CLARK', 'MANAGER', 7839, str_to_date('1981-06-09'
|
||||
, '%Y-%m-%d'), 2450, null, 10);
|
||||
INSERT INTO emp1 values (7788, 'SCOTT', 'ANALYST', 7566, str_to_date('1987-08-19',
|
||||
'%Y-%m-%d'), 3000, null, 20);
|
||||
INSERT INTO emp1 values (7839, 'KING', 'PRESIDENT', null, str_to_date('1981-11-17', '%Y-%m-%d'), 5000, null, 10);
|
||||
INSERT INTO emp1 values (7844, 'TURNER', 'SALESMAN', 7698, str_to_date('1981-09-08', '%Y-%m-%d'), 1500, 0, 30);
|
||||
INSERT INTO emp1 values (7876, 'ADAMS', 'CLERK', 7788, str_to_date('1987-05-23',
|
||||
'%Y-%m-%d'), 1100, null, 20);
|
||||
INSERT INTO emp1 values (7900, 'JAMES', 'CLERK', 7698, str_to_date('1981-12-03',
|
||||
'%Y-%m-%d'), 950, null, 30);
|
||||
INSERT INTO emp1 values (7902, 'FORD', 'ANALYST', 7566, str_to_date('1981-12-03',
|
||||
'%Y-%m-%d'), 3000, null, 20);
|
||||
INSERT INTO emp1 values (7934, 'MILLER', 'CLERK', 7782, str_to_date('1982-01-23',
|
||||
'%Y-%m-%d'), 1300, null, 10);
|
||||
|
||||
INSERT INTO emp1 values (8100, 'Eve', 'MANAGER', 7839, str_to_date('1984-05-01',
|
||||
'%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (8101, 'Eve1', 'MANAGER', 8100, str_to_date('1984-05-01',
|
||||
'%Y-%m-%d'), 2850, null, 30);
|
||||
INSERT INTO emp1 values (8108, 'Eve8', 'CLERK', 8101, str_to_date('1984-05-01',
|
||||
'%Y-%m-%d'), 2850, null, 30);
|
||||
|
||||
result_format: 4
|
||||
## =======================================================================
|
||||
## Test Case 1:
|
||||
## - recursive WITH Query: Nested Loop Join
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (ename, mgr, empno) AS
|
||||
(
|
||||
SELECT ename, mgr, empno
|
||||
FROM emp e
|
||||
WHERE job = 'PRESIDENT'
|
||||
UNION ALL
|
||||
SELECT /*+ USE_NL(r e) */ e.ename, e.mgr, e.empno
|
||||
FROM rw r, emp e
|
||||
WHERE r.empno = e.mgr
|
||||
)
|
||||
SELECT ename, empno, mgr
|
||||
FROM rw;
|
||||
+--------+-------+------+
|
||||
| ename | empno | mgr |
|
||||
+--------+-------+------+
|
||||
| KING | 7839 | NULL |
|
||||
| CLARK | 7782 | 7839 |
|
||||
| BLAKE | 7698 | 7839 |
|
||||
| JONES | 7566 | 7839 |
|
||||
| MILLER | 7934 | 7782 |
|
||||
| JAMES | 7900 | 7698 |
|
||||
| TURNER | 7844 | 7698 |
|
||||
| MARTIN | 7654 | 7698 |
|
||||
| WARD | 7521 | 7698 |
|
||||
| ALLEN | 7499 | 7698 |
|
||||
| FORD | 7902 | 7566 |
|
||||
| SCOTT | 7788 | 7566 |
|
||||
| SMITH | 7369 | 7902 |
|
||||
| ADAMS | 7876 | 7788 |
|
||||
+--------+-------+------+
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 2:
|
||||
## - recursive WITH Query: SORT MERGE Join
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (ename, mgr, empno) AS
|
||||
(
|
||||
SELECT ename, mgr, empno
|
||||
FROM emp e
|
||||
WHERE job = 'PRESIDENT'
|
||||
UNION ALL
|
||||
SELECT /*+ USE_MERGE(r e) */ e.ename, e.mgr, e.empno
|
||||
FROM rw r, emp e
|
||||
WHERE r.empno = e.mgr
|
||||
)
|
||||
SELECT ename, empno, mgr
|
||||
FROM rw;
|
||||
+--------+-------+------+
|
||||
| ename | empno | mgr |
|
||||
+--------+-------+------+
|
||||
| KING | 7839 | NULL |
|
||||
| CLARK | 7782 | 7839 |
|
||||
| BLAKE | 7698 | 7839 |
|
||||
| JONES | 7566 | 7839 |
|
||||
| MILLER | 7934 | 7782 |
|
||||
| JAMES | 7900 | 7698 |
|
||||
| TURNER | 7844 | 7698 |
|
||||
| MARTIN | 7654 | 7698 |
|
||||
| WARD | 7521 | 7698 |
|
||||
| ALLEN | 7499 | 7698 |
|
||||
| FORD | 7902 | 7566 |
|
||||
| SCOTT | 7788 | 7566 |
|
||||
| SMITH | 7369 | 7902 |
|
||||
| ADAMS | 7876 | 7788 |
|
||||
+--------+-------+------+
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 3:
|
||||
## - recursive WITH Query: Hash Join
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (ename, mgr, empno) AS
|
||||
(
|
||||
SELECT ename, mgr, empno
|
||||
FROM emp e
|
||||
WHERE job = 'PRESIDENT'
|
||||
UNION ALL
|
||||
SELECT /*+ USE_HASH(r e) */ e.ename, e.mgr, e.empno
|
||||
FROM rw r, emp e
|
||||
WHERE r.empno = e.mgr
|
||||
)
|
||||
SELECT ename, empno, mgr
|
||||
FROM rw;
|
||||
+--------+-------+------+
|
||||
| ename | empno | mgr |
|
||||
+--------+-------+------+
|
||||
| KING | 7839 | NULL |
|
||||
| CLARK | 7782 | 7839 |
|
||||
| BLAKE | 7698 | 7839 |
|
||||
| JONES | 7566 | 7839 |
|
||||
| MILLER | 7934 | 7782 |
|
||||
| JAMES | 7900 | 7698 |
|
||||
| TURNER | 7844 | 7698 |
|
||||
| MARTIN | 7654 | 7698 |
|
||||
| WARD | 7521 | 7698 |
|
||||
| ALLEN | 7499 | 7698 |
|
||||
| FORD | 7902 | 7566 |
|
||||
| SCOTT | 7788 | 7566 |
|
||||
| SMITH | 7369 | 7902 |
|
||||
| ADAMS | 7876 | 7788 |
|
||||
+--------+-------+------+
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 4:
|
||||
## - recursive WITH Query: Join in Initialisation Branch
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (ename, mgr, empno) AS
|
||||
(
|
||||
SELECT /*+ USE_NL(e d) */ e.ename, e.mgr, e.empno
|
||||
FROM emp e, emp d
|
||||
WHERE e.sal = d. sal
|
||||
UNION ALL
|
||||
SELECT /*+ USE_HASH(r e) */ e.ename, e.mgr, e.empno
|
||||
FROM rw r, emp e, emp d
|
||||
WHERE r.empno = e.mgr and e.sal = d.sal
|
||||
)
|
||||
SELECT ename, empno, mgr
|
||||
FROM rw;
|
||||
+--------+-------+------+
|
||||
| ename | empno | mgr |
|
||||
+--------+-------+------+
|
||||
| SMITH | 7369 | 7902 |
|
||||
| ALLEN | 7499 | 7698 |
|
||||
| WARD | 7521 | 7698 |
|
||||
| WARD | 7521 | 7698 |
|
||||
| JONES | 7566 | 7839 |
|
||||
| MARTIN | 7654 | 7698 |
|
||||
| MARTIN | 7654 | 7698 |
|
||||
| BLAKE | 7698 | 7839 |
|
||||
| CLARK | 7782 | 7839 |
|
||||
| SCOTT | 7788 | 7566 |
|
||||
| SCOTT | 7788 | 7566 |
|
||||
| KING | 7839 | NULL |
|
||||
| TURNER | 7844 | 7698 |
|
||||
| ADAMS | 7876 | 7788 |
|
||||
| JAMES | 7900 | 7698 |
|
||||
| FORD | 7902 | 7566 |
|
||||
| FORD | 7902 | 7566 |
|
||||
| MILLER | 7934 | 7782 |
|
||||
| WARD | 7521 | 7698 |
|
||||
| SMITH | 7369 | 7902 |
|
||||
| SMITH | 7369 | 7902 |
|
||||
| JONES | 7566 | 7839 |
|
||||
| BLAKE | 7698 | 7839 |
|
||||
| CLARK | 7782 | 7839 |
|
||||
| ADAMS | 7876 | 7788 |
|
||||
| ADAMS | 7876 | 7788 |
|
||||
| MILLER | 7934 | 7782 |
|
||||
| ALLEN | 7499 | 7698 |
|
||||
| FORD | 7902 | 7566 |
|
||||
| WARD | 7521 | 7698 |
|
||||
| MARTIN | 7654 | 7698 |
|
||||
| MARTIN | 7654 | 7698 |
|
||||
| TURNER | 7844 | 7698 |
|
||||
| JAMES | 7900 | 7698 |
|
||||
| SCOTT | 7788 | 7566 |
|
||||
| SCOTT | 7788 | 7566 |
|
||||
| FORD | 7902 | 7566 |
|
||||
| FORD | 7902 | 7566 |
|
||||
| FORD | 7902 | 7566 |
|
||||
| SCOTT | 7788 | 7566 |
|
||||
| SCOTT | 7788 | 7566 |
|
||||
| JAMES | 7900 | 7698 |
|
||||
| TURNER | 7844 | 7698 |
|
||||
| MARTIN | 7654 | 7698 |
|
||||
| MARTIN | 7654 | 7698 |
|
||||
| WARD | 7521 | 7698 |
|
||||
| WARD | 7521 | 7698 |
|
||||
| ALLEN | 7499 | 7698 |
|
||||
| MILLER | 7934 | 7782 |
|
||||
| SMITH | 7369 | 7902 |
|
||||
| ADAMS | 7876 | 7788 |
|
||||
| ADAMS | 7876 | 7788 |
|
||||
| SMITH | 7369 | 7902 |
|
||||
| SMITH | 7369 | 7902 |
|
||||
| SMITH | 7369 | 7902 |
|
||||
| ADAMS | 7876 | 7788 |
|
||||
| ADAMS | 7876 | 7788 |
|
||||
+--------+-------+------+
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 6:
|
||||
## - recursive WITH Query: Hash Join without using hints
|
||||
## Static input on build side and fits in memory
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (ename, mgr, empno) AS
|
||||
(
|
||||
SELECT ename, mgr, empno
|
||||
FROM emp e
|
||||
WHERE job = 'PRESIDENT'
|
||||
UNION ALL
|
||||
SELECT e.ename, e.mgr, e.empno
|
||||
FROM emp e, rw r
|
||||
WHERE e.mgr = r.empno
|
||||
)
|
||||
SELECT ename, empno, mgr
|
||||
FROM rw;
|
||||
+--------+-------+------+
|
||||
| ename | empno | mgr |
|
||||
+--------+-------+------+
|
||||
| KING | 7839 | NULL |
|
||||
| CLARK | 7782 | 7839 |
|
||||
| BLAKE | 7698 | 7839 |
|
||||
| JONES | 7566 | 7839 |
|
||||
| MILLER | 7934 | 7782 |
|
||||
| JAMES | 7900 | 7698 |
|
||||
| TURNER | 7844 | 7698 |
|
||||
| MARTIN | 7654 | 7698 |
|
||||
| WARD | 7521 | 7698 |
|
||||
| ALLEN | 7499 | 7698 |
|
||||
| FORD | 7902 | 7566 |
|
||||
| SCOTT | 7788 | 7566 |
|
||||
| SMITH | 7369 | 7902 |
|
||||
| ADAMS | 7876 | 7788 |
|
||||
+--------+-------+------+
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 7:
|
||||
## - recursive WITH Query: Hash Join without using hints
|
||||
## Static input on probe side and fits in memory
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (ename, mgr, empno) AS
|
||||
(
|
||||
SELECT ename, mgr, empno
|
||||
FROM emp e
|
||||
WHERE job = 'PRESIDENT'
|
||||
UNION ALL
|
||||
SELECT e.ename, e.mgr, e.empno
|
||||
FROM rw r, emp e
|
||||
WHERE r.empno = e.mgr
|
||||
)
|
||||
SELECT ename, empno, mgr
|
||||
FROM rw;
|
||||
+--------+-------+------+
|
||||
| ename | empno | mgr |
|
||||
+--------+-------+------+
|
||||
| KING | 7839 | NULL |
|
||||
| CLARK | 7782 | 7839 |
|
||||
| BLAKE | 7698 | 7839 |
|
||||
| JONES | 7566 | 7839 |
|
||||
| MILLER | 7934 | 7782 |
|
||||
| JAMES | 7900 | 7698 |
|
||||
| TURNER | 7844 | 7698 |
|
||||
| MARTIN | 7654 | 7698 |
|
||||
| WARD | 7521 | 7698 |
|
||||
| ALLEN | 7499 | 7698 |
|
||||
| FORD | 7902 | 7566 |
|
||||
| SCOTT | 7788 | 7566 |
|
||||
| SMITH | 7369 | 7902 |
|
||||
| ADAMS | 7876 | 7788 |
|
||||
+--------+-------+------+
|
||||
|
||||
## =======================================================================
|
||||
## 测试8-15都是在测试join的顺序或者hint的顺序
|
||||
## Test Case 8:
|
||||
## - recursive WITH Query: Join Order tests
|
||||
## pump >< emp >< emp1
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (empno, mgr, iters, sal) AS
|
||||
(
|
||||
SELECT e.empno, e.mgr, 1, e.sal
|
||||
FROM emp e, emp1 n1, emp1 n2
|
||||
WHERE e.empno = n1.empno and e.mgr = n2.empno and e.empno < e.mgr
|
||||
UNION ALL
|
||||
SELECT /*+ ORDERED USE_HASH (r e) */r.empno, e.mgr, r.iters + 1, r.sal + e.sal
|
||||
FROM rw r, emp e, emp1 n
|
||||
WHERE r.mgr = e.empno and e.mgr = n.empno and e.empno < e.mgr
|
||||
)
|
||||
SELECT *
|
||||
FROM rw
|
||||
ORDER BY 1, 3;
|
||||
+-------+------+-------+---------+
|
||||
| empno | mgr | iters | sal |
|
||||
+-------+------+-------+---------+
|
||||
| 7369 | 7902 | 1 | 800.00 |
|
||||
| 7499 | 7698 | 1 | 1600.00 |
|
||||
| 7499 | 7839 | 2 | 4450.00 |
|
||||
| 7521 | 7698 | 1 | 1250.00 |
|
||||
| 7521 | 7839 | 2 | 4100.00 |
|
||||
| 7566 | 7839 | 1 | 2975.00 |
|
||||
| 7654 | 7698 | 1 | 1250.00 |
|
||||
| 7654 | 7839 | 2 | 4100.00 |
|
||||
| 7698 | 7839 | 1 | 2850.00 |
|
||||
| 7782 | 7839 | 1 | 2450.00 |
|
||||
+-------+------+-------+---------+
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 9:
|
||||
## - recursive WITH Query: Join Order tests
|
||||
## emp >< pump >< emp1
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (empno, mgr, iters, sal) AS
|
||||
(
|
||||
SELECT e.empno, e.mgr, 1, e.sal
|
||||
FROM emp e, emp1 n1, emp1 n2
|
||||
WHERE e.empno = n1.empno and e.mgr = n2.empno and e.empno < e.mgr
|
||||
UNION ALL
|
||||
SELECT /*+ ORDERED USE_HASH (r e) */r.empno, e.mgr, r.iters + 1, r.sal + e.sal
|
||||
FROM emp e, rw r, emp1 n
|
||||
WHERE e.empno = r.mgr and e.mgr = n.empno and e.empno < e.mgr
|
||||
)
|
||||
SELECT *
|
||||
FROM rw
|
||||
ORDER BY 1, 3;
|
||||
+-------+------+-------+---------+
|
||||
| empno | mgr | iters | sal |
|
||||
+-------+------+-------+---------+
|
||||
| 7369 | 7902 | 1 | 800.00 |
|
||||
| 7499 | 7698 | 1 | 1600.00 |
|
||||
| 7499 | 7839 | 2 | 4450.00 |
|
||||
| 7521 | 7698 | 1 | 1250.00 |
|
||||
| 7521 | 7839 | 2 | 4100.00 |
|
||||
| 7566 | 7839 | 1 | 2975.00 |
|
||||
| 7654 | 7698 | 1 | 1250.00 |
|
||||
| 7654 | 7839 | 2 | 4100.00 |
|
||||
| 7698 | 7839 | 1 | 2850.00 |
|
||||
| 7782 | 7839 | 1 | 2450.00 |
|
||||
+-------+------+-------+---------+
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 10:
|
||||
## - recursive WITH Query: Join Order tests
|
||||
## emp >< emp1 >< pump
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (empno, mgr, iters, sal) AS
|
||||
(
|
||||
SELECT e.empno, e.mgr, 1, e.sal
|
||||
FROM emp e, emp1 n1, emp1 n2
|
||||
WHERE e.empno = n1.empno and e.mgr = n2.empno and e.empno < e.mgr
|
||||
UNION ALL
|
||||
SELECT /*+ ORDERED USE_HASH (r e) */r.empno, e.mgr, r.iters + 1, r.sal + e.sal
|
||||
FROM emp e, emp1 n, rw r
|
||||
WHERE e.mgr = n.empno and e.empno = r.mgr and e.empno < e.mgr
|
||||
)
|
||||
SELECT *
|
||||
FROM rw
|
||||
ORDER BY 1, 3;
|
||||
+-------+------+-------+---------+
|
||||
| empno | mgr | iters | sal |
|
||||
+-------+------+-------+---------+
|
||||
| 7369 | 7902 | 1 | 800.00 |
|
||||
| 7499 | 7698 | 1 | 1600.00 |
|
||||
| 7499 | 7839 | 2 | 4450.00 |
|
||||
| 7521 | 7698 | 1 | 1250.00 |
|
||||
| 7521 | 7839 | 2 | 4100.00 |
|
||||
| 7566 | 7839 | 1 | 2975.00 |
|
||||
| 7654 | 7698 | 1 | 1250.00 |
|
||||
| 7654 | 7839 | 2 | 4100.00 |
|
||||
| 7698 | 7839 | 1 | 2850.00 |
|
||||
| 7782 | 7839 | 1 | 2450.00 |
|
||||
+-------+------+-------+---------+
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 11:
|
||||
## - recursive WITH Query: Join Order tests
|
||||
## emp1 >< emp >< pump
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (empno, mgr, iters, sal) AS
|
||||
(
|
||||
SELECT e.empno, e.mgr, 1, e.sal
|
||||
FROM emp e, emp1 n1, emp1 n2
|
||||
WHERE e.empno = n1.empno and e.mgr = n2.empno and e.empno < e.mgr
|
||||
UNION ALL
|
||||
SELECT /*+ ORDERED USE_HASH (r e) */r.empno, e.mgr, r.iters + 1, r.sal + e.sal
|
||||
FROM emp1 n, emp e, rw r
|
||||
WHERE n.empno = e.mgr and e.empno = r.mgr and e.empno < e.mgr
|
||||
)
|
||||
SELECT *
|
||||
FROM rw
|
||||
ORDER BY 1, 3;
|
||||
+-------+------+-------+---------+
|
||||
| empno | mgr | iters | sal |
|
||||
+-------+------+-------+---------+
|
||||
| 7369 | 7902 | 1 | 800.00 |
|
||||
| 7499 | 7698 | 1 | 1600.00 |
|
||||
| 7499 | 7839 | 2 | 4450.00 |
|
||||
| 7521 | 7698 | 1 | 1250.00 |
|
||||
| 7521 | 7839 | 2 | 4100.00 |
|
||||
| 7566 | 7839 | 1 | 2975.00 |
|
||||
| 7654 | 7698 | 1 | 1250.00 |
|
||||
| 7654 | 7839 | 2 | 4100.00 |
|
||||
| 7698 | 7839 | 1 | 2850.00 |
|
||||
| 7782 | 7839 | 1 | 2450.00 |
|
||||
+-------+------+-------+---------+
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 12:
|
||||
## - recursive WITH Query: Join Order tests
|
||||
## pump >< emp
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (ename, mgr, empno) AS
|
||||
(
|
||||
SELECT ename, mgr, empno
|
||||
FROM emp e
|
||||
WHERE job = 'PRESIDENT'
|
||||
UNION ALL
|
||||
SELECT /*+ ORDERED USE_HASH (r e) */ e.ename, e.mgr, e.empno
|
||||
FROM rw r, emp e
|
||||
WHERE r.empno = e.mgr
|
||||
)
|
||||
SELECT ename, empno, mgr
|
||||
FROM rw;
|
||||
+--------+-------+------+
|
||||
| ename | empno | mgr |
|
||||
+--------+-------+------+
|
||||
| KING | 7839 | NULL |
|
||||
| CLARK | 7782 | 7839 |
|
||||
| BLAKE | 7698 | 7839 |
|
||||
| JONES | 7566 | 7839 |
|
||||
| MILLER | 7934 | 7782 |
|
||||
| JAMES | 7900 | 7698 |
|
||||
| TURNER | 7844 | 7698 |
|
||||
| MARTIN | 7654 | 7698 |
|
||||
| WARD | 7521 | 7698 |
|
||||
| ALLEN | 7499 | 7698 |
|
||||
| FORD | 7902 | 7566 |
|
||||
| SCOTT | 7788 | 7566 |
|
||||
| SMITH | 7369 | 7902 |
|
||||
| ADAMS | 7876 | 7788 |
|
||||
+--------+-------+------+
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 13:
|
||||
## - recursive WITH Query: Join Order tests
|
||||
## emp >< pump
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (ename, mgr, empno) AS
|
||||
(
|
||||
SELECT ename, mgr, empno
|
||||
FROM emp e
|
||||
WHERE job = 'PRESIDENT'
|
||||
UNION ALL
|
||||
SELECT /*+ ORDERED USE_HASH (r e) */ e.ename, e.mgr, e.empno
|
||||
FROM emp e, rw r
|
||||
WHERE e.mgr = r.empno
|
||||
)
|
||||
SELECT ename, empno, mgr
|
||||
FROM rw;
|
||||
+--------+-------+------+
|
||||
| ename | empno | mgr |
|
||||
+--------+-------+------+
|
||||
| KING | 7839 | NULL |
|
||||
| CLARK | 7782 | 7839 |
|
||||
| BLAKE | 7698 | 7839 |
|
||||
| JONES | 7566 | 7839 |
|
||||
| MILLER | 7934 | 7782 |
|
||||
| JAMES | 7900 | 7698 |
|
||||
| TURNER | 7844 | 7698 |
|
||||
| MARTIN | 7654 | 7698 |
|
||||
| WARD | 7521 | 7698 |
|
||||
| ALLEN | 7499 | 7698 |
|
||||
| FORD | 7902 | 7566 |
|
||||
| SCOTT | 7788 | 7566 |
|
||||
| SMITH | 7369 | 7902 |
|
||||
| ADAMS | 7876 | 7788 |
|
||||
+--------+-------+------+
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 14:
|
||||
## - recursive WITH Query: Join Order tests
|
||||
## emp1 >< pump >< emp
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (empno, mgr, iters, sal) AS
|
||||
(
|
||||
SELECT e.empno, e.mgr, 1, e.sal
|
||||
FROM emp e, emp1 n1, emp1 n2
|
||||
WHERE e.empno = n1.empno and e.mgr = n2.empno and e.empno < e.mgr
|
||||
UNION ALL
|
||||
SELECT /*+ ORDERED USE_HASH (r e) */r.empno, e.mgr, r.iters + 1, r.sal + e.sal
|
||||
FROM emp1 n, rw r, emp e
|
||||
WHERE n.empno = e.mgr and r.mgr = e.empno and e.empno < e.mgr
|
||||
)
|
||||
SELECT *
|
||||
FROM rw
|
||||
ORDER BY 1, 3;
|
||||
+-------+------+-------+---------+
|
||||
| empno | mgr | iters | sal |
|
||||
+-------+------+-------+---------+
|
||||
| 7369 | 7902 | 1 | 800.00 |
|
||||
| 7499 | 7698 | 1 | 1600.00 |
|
||||
| 7499 | 7839 | 2 | 4450.00 |
|
||||
| 7521 | 7698 | 1 | 1250.00 |
|
||||
| 7521 | 7839 | 2 | 4100.00 |
|
||||
| 7566 | 7839 | 1 | 2975.00 |
|
||||
| 7654 | 7698 | 1 | 1250.00 |
|
||||
| 7654 | 7839 | 2 | 4100.00 |
|
||||
| 7698 | 7839 | 1 | 2850.00 |
|
||||
| 7782 | 7839 | 1 | 2450.00 |
|
||||
+-------+------+-------+---------+
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 15:
|
||||
## - recursive WITH Query: Join Order tests
|
||||
## pump >< emp1 >< emp
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (empno, mgr, iters, sal) AS
|
||||
(
|
||||
SELECT e.empno, e.mgr, 1, e.sal
|
||||
FROM emp e, emp1 n1, emp1 n2
|
||||
WHERE e.empno = n1.empno and e.mgr = n2.empno and e.empno < e.mgr
|
||||
UNION ALL
|
||||
SELECT /*+ ORDERED USE_HASH (r e) */r.empno, e.mgr, r.iters + 1, r.sal + e.sal
|
||||
FROM rw r, emp1 n, emp e
|
||||
WHERE r.mgr = e.empno and n.empno = e.mgr and e.empno < e.mgr
|
||||
)
|
||||
SELECT *
|
||||
FROM rw
|
||||
ORDER BY 1, 3;
|
||||
+-------+------+-------+---------+
|
||||
| empno | mgr | iters | sal |
|
||||
+-------+------+-------+---------+
|
||||
| 7369 | 7902 | 1 | 800.00 |
|
||||
| 7499 | 7698 | 1 | 1600.00 |
|
||||
| 7499 | 7839 | 2 | 4450.00 |
|
||||
| 7521 | 7698 | 1 | 1250.00 |
|
||||
| 7521 | 7839 | 2 | 4100.00 |
|
||||
| 7566 | 7839 | 1 | 2975.00 |
|
||||
| 7654 | 7698 | 1 | 1250.00 |
|
||||
| 7654 | 7839 | 2 | 4100.00 |
|
||||
| 7698 | 7839 | 1 | 2850.00 |
|
||||
| 7782 | 7839 | 1 | 2450.00 |
|
||||
+-------+------+-------+---------+
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 16:
|
||||
## - recursive WITH Query: Join Skew handling. No local filter
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (ename, mgr, empno) AS
|
||||
(
|
||||
SELECT ename, mgr, empno
|
||||
FROM emp e
|
||||
WHERE job = 'PRESIDENT'
|
||||
UNION ALL
|
||||
SELECT /*+ PQ_SKEW (r) */ e.ename, e.mgr, e.empno
|
||||
FROM rw r, emp e
|
||||
WHERE r.empno = e.mgr
|
||||
)
|
||||
SELECT ename, empno, mgr
|
||||
FROM rw;
|
||||
+--------+-------+------+
|
||||
| ename | empno | mgr |
|
||||
+--------+-------+------+
|
||||
| KING | 7839 | NULL |
|
||||
| CLARK | 7782 | 7839 |
|
||||
| BLAKE | 7698 | 7839 |
|
||||
| JONES | 7566 | 7839 |
|
||||
| MILLER | 7934 | 7782 |
|
||||
| JAMES | 7900 | 7698 |
|
||||
| TURNER | 7844 | 7698 |
|
||||
| MARTIN | 7654 | 7698 |
|
||||
| WARD | 7521 | 7698 |
|
||||
| ALLEN | 7499 | 7698 |
|
||||
| FORD | 7902 | 7566 |
|
||||
| SCOTT | 7788 | 7566 |
|
||||
| SMITH | 7369 | 7902 |
|
||||
| ADAMS | 7876 | 7788 |
|
||||
+--------+-------+------+
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 17:
|
||||
## - recursive WITH Query: Join Skew handling with an additional local filter
|
||||
## =======================================================================
|
||||
|
||||
WITH rw (ename, mgr, empno) AS
|
||||
(
|
||||
SELECT ename, mgr, empno
|
||||
FROM emp e
|
||||
WHERE job = 'PRESIDENT'
|
||||
UNION ALL
|
||||
SELECT /*+ PQ_SKEW (r) */ e.ename, e.mgr, e.empno
|
||||
FROM rw r, emp e
|
||||
WHERE r.empno = e.mgr and e.empno < e.mgr
|
||||
)
|
||||
SELECT ename, empno, mgr
|
||||
FROM rw;
|
||||
+--------+-------+------+
|
||||
| ename | empno | mgr |
|
||||
+--------+-------+------+
|
||||
| KING | 7839 | NULL |
|
||||
| CLARK | 7782 | 7839 |
|
||||
| BLAKE | 7698 | 7839 |
|
||||
| JONES | 7566 | 7839 |
|
||||
| MARTIN | 7654 | 7698 |
|
||||
| WARD | 7521 | 7698 |
|
||||
| ALLEN | 7499 | 7698 |
|
||||
+--------+-------+------+
|
||||
File diff suppressed because it is too large
Load Diff
@ -0,0 +1,102 @@
|
||||
drop database if exists ctetest;
|
||||
create database ctetest;
|
||||
use ctetest;
|
||||
create table EMP (
|
||||
EMPno number,
|
||||
ENAME varchar(30),
|
||||
JOB varchar(30),
|
||||
MGR number(4),
|
||||
HIREDATE date,
|
||||
SAL number(7,2),
|
||||
COMM number(7,2),
|
||||
DEPTNO number(2)
|
||||
) ;
|
||||
create table DEPT(
|
||||
DEPTNO number(2),
|
||||
DNAME char(45),
|
||||
LOC varchar(39)
|
||||
) ;
|
||||
insert into EMP values (7369,'SMITH','CLERK',7902, str_to_date('17-DEC-80','%d-%b-%Y'),800,NULL, 20) ;
|
||||
INSERT INTO EMP VALUES (7499, 'ALLEN','SALESMAN',7698,str_to_date('20-FEB-81','%d-%b-%Y'),1600,300,30) ;
|
||||
INSERT INTO EMP VALUES (7521,'WARD','SALESMAN',7698, str_to_date('22-FEB-81','%d-%b-%Y'),1250, 500, 30) ;
|
||||
INSERT INTO EMP VALUES (7566,'JONES','MANAGER',7839, str_to_date('02-APR-81','%d-%b-%Y'), 2975, NULL, 20) ;
|
||||
INSERT INTO EMP VALUES (7654,'MARTIN','SALESMAN', 7698, str_to_date('28-SEP-81','%d-%b-%Y'), 1250, 1400, 30) ;
|
||||
INSERT INTO EMP VALUES (7698, 'BLAKE','MANAGER', 7839, str_to_date('01-MAY-81','%d-%b-%Y'), 2850, NULL, 30) ;
|
||||
INSERT INTO EMP VALUES (7782, 'CLARK','MANAGER', 7839, str_to_date('09-JUN-81','%d-%b-%Y'), 2450, NULL, 10) ;
|
||||
insert into EMP values (7788,'SCOTT','ANALYST', 7566, str_to_date('19-APR-87','%d-%b-%Y'), 3000, null, 20) ;
|
||||
INSERT INTO EMP VALUES (7839, 'KING','PRESIDENT', NULL, str_to_date('17-NOV-81','%d-%b-%Y'), 5000, NULL, 10) ;
|
||||
INSERT INTO EMP VALUES (7844, 'TURNER','SALESMAN', 7698, str_to_date('08-SEP-81','%d-%b-%Y'), 1500, 0, 30) ;
|
||||
INSERT INTO EMP VALUES(7876, 'ADAMS','CLERK', 7788, str_to_date('23-MAY-87','%d-%b-%Y'), 1100, NULL, 20) ;
|
||||
INSERT INTO EMP VALUES(7900, 'JAMES', 'CLEARK', 7698, str_to_date('03-DEC-81','%d-%b-%Y'), 950, NULL, 30) ;
|
||||
INSERT INTO EMP VALUES(7902, 'FORD','ANALYST',7566, str_to_date('03-DEC-81','%d-%b-%Y'), 3000, NULL, 20) ;
|
||||
INSERT INTO EMP VALUES(7934,'MILLER','CLERK', 7782, str_to_date('23-JAN-82','%d-%b-%Y'), 1300,NULL, 10) ;
|
||||
result_format: 4
|
||||
|
||||
## =======================================================================
|
||||
## Test Case 1:
|
||||
## - recursive WITH Query: Optimization on query with outside filter.
|
||||
## Predicate pushdown optimization on static value job.
|
||||
## The plan should reflect optimization or development can provide
|
||||
## parameter to show that pushdown optimization happened for init branch
|
||||
## =======================================================================
|
||||
explain basic
|
||||
WITH rw (ename, mgr, empno, job) AS
|
||||
(
|
||||
SELECT ename, mgr, empno, job
|
||||
FROM emp e
|
||||
UNION ALL
|
||||
SELECT e.ename, e.mgr, e.empno, e.job
|
||||
FROM rw r, emp e
|
||||
WHERE r.empno = e.mgr
|
||||
)
|
||||
SELECT ename, empno, mgr, job
|
||||
FROM rw
|
||||
WHERE job = 'PRESIDENT' ;
|
||||
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|
||||
| Query Plan |
|
||||
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|
||||
| ==============================
|
||||
|ID|OPERATOR |NAME|
|
||||
------------------------------
|
||||
|0 |SUBPLAN SCAN |rw |
|
||||
|1 | RECURSIVE UNION ALL| |
|
||||
|2 | TABLE SCAN |e |
|
||||
|3 | HASH JOIN | |
|
||||
|4 | TABLE SCAN |e |
|
||||
|5 | TABLE SCAN |r |
|
||||
==============================
|
||||
|
||||
Outputs & filters:
|
||||
-------------------------------------
|
||||
0 - output([rw.ename], [rw.empno], [rw.mgr], [rw.job]), filter([rw.job = 'PRESIDENT']),
|
||||
access([rw.job], [rw.ename], [rw.empno], [rw.mgr])
|
||||
1 - output([UNION([1])], [UNION([2])], [UNION([3])], [UNION([4])]), filter(nil)
|
||||
2 - output([e.ENAME], [e.MGR], [e.EMPno], [e.JOB]), filter(nil),
|
||||
access([e.ENAME], [e.MGR], [e.EMPno], [e.JOB]), partitions(p0)
|
||||
3 - output([e.ENAME], [e.MGR], [e.EMPno], [e.JOB]), filter(nil),
|
||||
equal_conds([r.empno = e.MGR]), other_conds(nil)
|
||||
4 - output([e.MGR], [e.ENAME], [e.EMPno], [e.JOB]), filter(nil),
|
||||
access([e.MGR], [e.ENAME], [e.EMPno], [e.JOB]), partitions(p0)
|
||||
5 - output([r.empno]), filter(nil),
|
||||
access([r.empno]), partitions(nil)
|
||||
|
|
||||
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|
||||
|
||||
WITH rw (ename, mgr, empno, job) AS
|
||||
(
|
||||
SELECT ename, mgr, empno, job
|
||||
FROM emp e
|
||||
UNION ALL
|
||||
SELECT e.ename, e.mgr, e.empno, e.job
|
||||
FROM rw r, emp e
|
||||
WHERE r.empno = e.mgr
|
||||
)
|
||||
SELECT /*+ :HINT: */ ename, empno, mgr, job
|
||||
FROM rw
|
||||
WHERE job = 'PRESIDENT' ;
|
||||
+-------+-------+------+-----------+
|
||||
| ename | empno | mgr | job |
|
||||
+-------+-------+------+-----------+
|
||||
| KING | 7839 | NULL | PRESIDENT |
|
||||
+-------+-------+------+-----------+
|
||||
|
||||
Reference in New Issue
Block a user