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5a4537f092
The method With_element::check_unrestricted_recursive() icorrectly performed the check that no recursive reference is not encountered in inner parts of outer joins. As a result the server reported errors for valid specifications with outer joins.
1561 lines
34 KiB
Text
1561 lines
34 KiB
Text
create table t1 (a int, b varchar(32));
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insert into t1 values
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(4,'aaaa' ), (7,'bb'), (1,'ccc'), (4,'dd');
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insert into t1 values
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(3,'eee'), (7,'bb'), (1,'fff'), (4,'ggg');
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--ERROR ER_UNACCEPTABLE_MUTUAL_RECURSION
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with recursive
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t as
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(
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select * from t1 where t1.b >= 'c'
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union
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select * from r
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),
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r as
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(
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select * from t
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union
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select t1.* from t1,r where r.a+1 = t1.a
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)
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select * from r;
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--ERROR ER_UNACCEPTABLE_MUTUAL_RECURSION
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with recursive
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a1(a,b) as
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(select * from t1 where t1.a>3
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union
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select * from b1 where b1.a >3
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union
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select * from c1 where c1.a>3),
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b1(a,b) as
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(select * from a1 where a1.b > 'ccc'
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union
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select * from c1 where c1.b > 'ddd'),
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c1(a,b) as
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(select * from a1 where a1.a<6 and a1.b< 'zz'
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union
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select * from b1 where b1.b > 'auu')
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select * from c1;
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drop table t1;
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--echo # WITH RECURSIVE vs just WITH
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create table t1 (a int);
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insert into t1 values
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(0), (1), (2), (3), (4);
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create table t2 (a int);
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insert into t2 values
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(1), (2), (3), (4), (5);
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--echo # just WITH : s refers to t defined after s
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--ERROR ER_NO_SUCH_TABLE
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with
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s(a) as (select t.a + 10 from t),
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t(a) as (select t1.a from t1)
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select * from s;
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--echo # WITH RECURSIVE: s refers to t defined after s
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with recursive
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s(a) as (select t.a + 10 from t),
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t(a) as (select t1.a from t1)
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select * from s;
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--echo # just WITH : defined t1 is non-recursive and uses base tables t1,t2
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with
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t1 as
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(
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select a from t2 where t2.a=3
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union
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select t2.a from t1,t2 where t1.a+1=t2.a
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)
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select * from t1;
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explain
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with
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t1 as
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(
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select a from t2 where t2.a=3
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union
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select t2.a from t1,t2 where t1.a+1=t2.a
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)
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select * from t1;
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--echo #WITH RECURSIVE : defined t1 is recursive and uses only base table t2
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with recursive
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t1 as
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(
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select a from t2 where t2.a=3
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union
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select t2.a from t1,t2 where t1.a+1=t2.a
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)
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select * from t1;
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explain
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with recursive
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t1 as
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(
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select a from t2 where t2.a=3
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union
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select t2.a from t1,t2 where t1.a+1=t2.a
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)
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select * from t1;
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--echo # just WITH : types of t1 columns are determined by all parts of union
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create view v1 as
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with
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t1 as
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(
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select a from t2 where t2.a=3
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union
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select t2.a+1 from t1,t2 where t1.a=t2.a
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)
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select * from t1;
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show columns from v1;
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--echo # WITH RECURSIVE : types of t1 columns are determined by anchor parts
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create view v2 as
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with recursive
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t1 as
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(
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select a from t2 where t2.a=3
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union
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select t2.a+1 from t1,t2 where t1.a=t2.a
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)
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select * from t1;
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show columns from v2;
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drop view v1,v2;
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drop table t1,t2;
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create table folks(id int, name char(32), dob date, father int, mother int);
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insert into folks values
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(100, 'Me', '2000-01-01', 20, 30),
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(20, 'Dad', '1970-02-02', 10, 9),
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(30, 'Mom', '1975-03-03', 8, 7),
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(10, 'Grandpa Bill', '1940-04-05', null, null),
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(9, 'Grandma Ann', '1941-10-15', null, null),
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(25, 'Uncle Jim', '1968-11-18', 8, 7),
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(98, 'Sister Amy', '2001-06-20', 20, 30),
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(7, 'Grandma Sally', '1943-08-23', null, 6),
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(8, 'Grandpa Ben', '1940-10-21', null, null),
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(6, 'Grandgrandma Martha', '1923-05-17', null, null),
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(67, 'Cousin Eddie', '1992-02-28', 25, 27),
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(27, 'Auntie Melinda', '1971-03-29', null, null);
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--echo # simple recursion with one anchor and one recursive select
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--echo # the anchor is the first select in the specification
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with recursive
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ancestors
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as
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(
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select *
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from folks
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where name = 'Me' and dob = '2000-01-01'
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union
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select p.id, p.name, p.dob, p.father, p.mother
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from folks as p, ancestors AS a
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where p.id = a.father or p.id = a.mother
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)
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select * from ancestors;
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--echo # simple recursion with one anchor and one recursive select
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--echo # the anchor is the last select in the specification
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with recursive
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ancestors
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as
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(
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select p.*
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from folks as p, ancestors AS a
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where p.id = a.father or p.id = a.mother
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union
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select *
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from folks
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where name = 'Me' and dob = '2000-01-01'
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)
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select * from ancestors;
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--echo # simple recursion with one anchor and one recursive select
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--echo # the anchor is the first select in the specification
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with recursive
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ancestors
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as
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(
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select *
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from folks
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where name = 'Cousin Eddie'
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union
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select p.*
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from folks as p, ancestors as a
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where p.id = a.father or p.id = a.mother
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)
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select * from ancestors;
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--echo # simple recursion with or in anchor and or in recursive part
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with recursive
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ancestors
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as
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(
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select *
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from folks
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where name = 'Me' or name='Sister Amy'
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union
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select p.*
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from folks as p, ancestors as a
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where p.id = a.father or p.id = a.mother
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)
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select * from ancestors;
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--echo # two recursive definition, one uses another
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with recursive
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prev_gen
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as
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(
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select folks.*
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from folks, prev_gen
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where folks.id=prev_gen.father or folks.id=prev_gen.mother
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union
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select *
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from folks
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where name='Me'
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),
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ancestors
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as
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(
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select *
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from folks
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where name='Me'
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union
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select *
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from ancestors
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union
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select *
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from prev_gen
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)
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select ancestors.name, ancestors.dob from ancestors;
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--echo # recursive definition with two attached non-recursive
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with recursive
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ancestors(id,name,dob)
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as
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(
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with
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father(child_id,id,name,dob)
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as
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(
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select folks.id, f.id, f.name, f.dob
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from folks, folks f
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where folks.father=f.id
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),
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mother(child_id,id,name,dob)
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as
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(
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select folks.id, m.id, m.name, m.dob
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from folks, folks m
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where folks.mother=m.id
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)
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select folks.id, folks.name, folks.dob
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from folks
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where name='Me'
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union
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select f.id, f.name, f.dob
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from ancestors a, father f
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where f.child_id=a.id
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union
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select m.id, m.name, m.dob
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from ancestors a, mother m
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where m.child_id=a.id
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)
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select ancestors.name, ancestors.dob from ancestors;
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--echo # simple recursion with one anchor and one recursive select
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--echo # the anchor is the first select in the specification
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with recursive
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descendants
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as
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(
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select *
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from folks
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where name = 'Grandpa Bill'
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union
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select folks.*
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from folks, descendants as d
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where d.id=folks.father or d.id=folks.mother
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)
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select * from descendants;
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--echo # simple recursion with one anchor and one recursive select
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--echo # the anchor is the first select in the specification
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with recursive
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descendants
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as
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(
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select *
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from folks
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where name = 'Grandma Sally'
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union
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select folks.*
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from folks, descendants as d
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where d.id=folks.father or d.id=folks.mother
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)
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select * from descendants;
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--echo # simple recursive table used three times in the main query
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with recursive
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ancestors
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as
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(
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select *
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from folks
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where name = 'Me' and dob = '2000-01-01'
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union
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select p.*
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from folks as p, ancestors AS a
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where p.id = a.father OR p.id = a.mother
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)
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select *
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from ancestors t1, ancestors t2
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where exists (select * from ancestors a
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where a.father=t1.id AND a.mother=t2.id);
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--echo # simple recursive table used three times in the main query
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with
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ancestor_couples(husband, h_dob, wife, w_dob)
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as
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(
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with recursive
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ancestors
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as
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(
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select *
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from folks
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where name = 'Me'
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union
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select p.*
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from folks as p, ancestors AS a
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where p.id = a.father OR p.id = a.mother
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)
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select t1.name, t1.dob, t2.name, t2.dob
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from ancestors t1, ancestors t2
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where exists (select * from ancestors a
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where a.father=t1.id AND a.mother=t2.id)
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)
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select * from ancestor_couples;
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--echo # simple recursion with two selects in recursive part
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with recursive
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ancestors
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as
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(
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select *
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from folks
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where name = 'Me'
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union
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select p.*
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from folks as p, ancestors as fa
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where p.id = fa.father
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union
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select p.*
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from folks as p, ancestors as ma
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where p.id = ma.mother
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)
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select * from ancestors;
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--echo # mutual recursion with renaming
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with recursive
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ancestor_couples(h_id, h_name, h_dob, h_father, h_mother,
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w_id, w_name, w_dob, w_father, w_mother)
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as
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(
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select h.*, w.*
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from folks h, folks w, coupled_ancestors a
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where a.father = h.id AND a.mother = w.id
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union
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select h.*, w.*
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from folks v, folks h, folks w
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where v.name = 'Me' and
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(v.father = h.id AND v.mother= w.id)
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),
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coupled_ancestors (id, name, dob, father, mother)
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as
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(
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select h_id, h_name, h_dob, h_father, h_mother
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from ancestor_couples
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union
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select w_id, w_name, w_dob, w_father, w_mother
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from ancestor_couples
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)
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select h_name, h_dob, w_name, w_dob
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from ancestor_couples;
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--echo # mutual recursion with union all
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with recursive
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ancestor_couples(h_id, h_name, h_dob, h_father, h_mother,
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w_id, w_name, w_dob, w_father, w_mother)
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as
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(
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select h.*, w.*
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from folks h, folks w, coupled_ancestors a
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where a.father = h.id AND a.mother = w.id
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union
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select h.*, w.*
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from folks v, folks h, folks w
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where v.name = 'Me' and
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(v.father = h.id AND v.mother= w.id)
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),
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coupled_ancestors (id, name, dob, father, mother)
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as
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(
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select h_id, h_name, h_dob, h_father, h_mother
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from ancestor_couples
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union all
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select w_id, w_name, w_dob, w_father, w_mother
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from ancestor_couples
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)
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select h_name, h_dob, w_name, w_dob
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from ancestor_couples;
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--echo # mutual recursion with renaming
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with recursive
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ancestor_couples(h_id, h_name, h_dob, h_father, h_mother,
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w_id, w_name, w_dob, w_father, w_mother)
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as
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(
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select h.*, w.*
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from folks h, folks w, coupled_ancestors a
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where a.father = h.id AND a.mother = w.id
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union
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select h.*, w.*
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from folks v, folks h, folks w
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where v.name = 'Me' and
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(v.father = h.id AND v.mother= w.id)
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),
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coupled_ancestors (id, name, dob, father, mother)
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as
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(
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select h_id, h_name, h_dob, h_father, h_mother
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from ancestor_couples
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union
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select w_id, w_name, w_dob, w_father, w_mother
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from ancestor_couples
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)
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select h_name, h_dob, w_name, w_dob
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from ancestor_couples;
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--echo # mutual recursion with union all
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with recursive
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ancestor_couples(h_id, h_name, h_dob, h_father, h_mother,
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w_id, w_name, w_dob, w_father, w_mother)
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as
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(
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select h.*, w.*
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from folks h, folks w, coupled_ancestors a
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where a.father = h.id AND a.mother = w.id
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),
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coupled_ancestors (id, name, dob, father, mother)
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as
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(
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select *
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from folks
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where name = 'Me'
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union all
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select h_id, h_name, h_dob, h_father, h_mother
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from ancestor_couples
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union all
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select w_id, w_name, w_dob, w_father, w_mother
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from ancestor_couples
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)
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select h_name, h_dob, w_name, w_dob
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from ancestor_couples;
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--echo # mutual recursion with one select in the first definition
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with recursive
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ancestor_couple_ids(h_id, w_id)
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as
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(
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select a.father, a.mother
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from coupled_ancestors a
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where a.father is not null and a.mother is not null
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),
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coupled_ancestors (id, name, dob, father, mother)
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as
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|
(
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select *
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from folks
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where name = 'Me'
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union all
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select p.*
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from folks p, ancestor_couple_ids fa
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where p.id = fa.h_id
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union all
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select p.*
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from folks p, ancestor_couple_ids ma
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where p.id = ma.w_id
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)
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select *
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from ancestor_couple_ids;
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|
|
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--echo # join of a mutually recursive table with base tables
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with recursive
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ancestor_couple_ids(h_id, w_id)
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as
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|
(
|
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select a.father, a.mother
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|
from coupled_ancestors a
|
|
where a.father is not null and a.mother is not null
|
|
),
|
|
coupled_ancestors (id, name, dob, father, mother)
|
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as
|
|
(
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select *
|
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from folks
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where name = 'Me'
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union all
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|
select p.*
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|
from folks p, ancestor_couple_ids fa
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where p.id = fa.h_id
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union all
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select p.*
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from folks p, ancestor_couple_ids ma
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where p.id = ma.w_id
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)
|
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select h.name, h.dob, w.name, w.dob
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from ancestor_couple_ids c, folks h, folks w
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where c.h_id = h.id and c.w_id= w.id;
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|
|
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--echo # join of two mutually recursive tables
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with recursive
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|
ancestor_couple_ids(h_id, w_id)
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|
as
|
|
(
|
|
select a.father, a.mother
|
|
from coupled_ancestors a
|
|
where a.father is not null and a.mother is not null
|
|
),
|
|
coupled_ancestors (id, name, dob, father, mother)
|
|
as
|
|
(
|
|
select *
|
|
from folks
|
|
where name = 'Me'
|
|
union all
|
|
select p.*
|
|
from folks p, ancestor_couple_ids fa
|
|
where p.id = fa.h_id
|
|
union all
|
|
select p.*
|
|
from folks p, ancestor_couple_ids ma
|
|
where p.id = ma.w_id
|
|
)
|
|
select h.name, h.dob, w.name, w.dob
|
|
from ancestor_couple_ids c, coupled_ancestors h, coupled_ancestors w
|
|
where c.h_id = h.id and c.w_id= w.id;
|
|
|
|
explain extended
|
|
with recursive
|
|
ancestor_couple_ids(h_id, w_id)
|
|
as
|
|
(
|
|
select a.father, a.mother
|
|
from coupled_ancestors a
|
|
where a.father is not null and a.mother is not null
|
|
),
|
|
coupled_ancestors (id, name, dob, father, mother)
|
|
as
|
|
(
|
|
select *
|
|
from folks
|
|
where name = 'Me'
|
|
union all
|
|
select p.*
|
|
from folks p, ancestor_couple_ids fa
|
|
where p.id = fa.h_id
|
|
union all
|
|
select p.*
|
|
from folks p, ancestor_couple_ids ma
|
|
where p.id = ma.w_id
|
|
)
|
|
select h.name, h.dob, w.name, w.dob
|
|
from ancestor_couple_ids c, coupled_ancestors h, coupled_ancestors w
|
|
where c.h_id = h.id and c.w_id= w.id;
|
|
|
|
|
|
--echo # simple mutual recursion
|
|
with recursive
|
|
ancestor_couple_ids(h_id, w_id)
|
|
as
|
|
(
|
|
select a.father, a.mother
|
|
from coupled_ancestors a
|
|
),
|
|
coupled_ancestors (id, name, dob, father, mother)
|
|
as
|
|
(
|
|
select *
|
|
from folks
|
|
where name = 'Me'
|
|
union all
|
|
select p.*
|
|
from folks p, ancestor_couple_ids fa
|
|
where p.id = fa.h_id
|
|
union all
|
|
select p.*
|
|
from folks p, ancestor_couple_ids ma
|
|
where p.id = ma.w_id
|
|
)
|
|
select *
|
|
from ancestor_couple_ids;
|
|
|
|
|
|
--echo # join of two mutually recursive tables
|
|
with recursive
|
|
ancestor_couple_ids(h_id, w_id)
|
|
as
|
|
(
|
|
select a.father, a.mother
|
|
from coupled_ancestors a
|
|
),
|
|
coupled_ancestors (id, name, dob, father, mother)
|
|
as
|
|
(
|
|
select *
|
|
from folks
|
|
where name = 'Me'
|
|
union all
|
|
select p.*
|
|
from folks p, ancestor_couple_ids fa
|
|
where p.id = fa.h_id
|
|
union all
|
|
select p.*
|
|
from folks p, ancestor_couple_ids ma
|
|
where p.id = ma.w_id
|
|
)
|
|
select h.name, h.dob, w.name, w.dob
|
|
from ancestor_couple_ids c, coupled_ancestors h, coupled_ancestors w
|
|
where c.h_id = h.id and c.w_id= w.id;
|
|
|
|
|
|
--echo # execution of prepared query using a recursive table
|
|
prepare stmt1 from "
|
|
with recursive
|
|
ancestors
|
|
as
|
|
(
|
|
select *
|
|
from folks
|
|
where name = 'Me' and dob = '2000-01-01'
|
|
union
|
|
select p.id, p.name, p.dob, p.father, p.mother
|
|
from folks as p, ancestors AS a
|
|
where p.id = a.father or p.id = a.mother
|
|
)
|
|
select * from ancestors;
|
|
";
|
|
|
|
execute stmt1;
|
|
execute stmt1;
|
|
|
|
deallocate prepare stmt1;
|
|
|
|
|
|
--echo # view using a recursive table
|
|
create view v1 as
|
|
with recursive
|
|
ancestors
|
|
as
|
|
(
|
|
select *
|
|
from folks
|
|
where name = 'Me' and dob = '2000-01-01'
|
|
union
|
|
select p.id, p.name, p.dob, p.father, p.mother
|
|
from folks as p, ancestors AS a
|
|
where p.id = a.father or p.id = a.mother
|
|
)
|
|
select * from ancestors;
|
|
|
|
show create view v1;
|
|
|
|
select * from v1;
|
|
|
|
create view v2 as
|
|
with recursive
|
|
ancestors
|
|
as
|
|
(
|
|
select *
|
|
from folks
|
|
where name = 'Me'
|
|
union
|
|
select p.*
|
|
from folks as p, ancestors as fa
|
|
where p.id = fa.father
|
|
union
|
|
select p.*
|
|
from folks as p, ancestors as ma
|
|
where p.id = ma.mother
|
|
)
|
|
select * from ancestors;
|
|
|
|
show create view v2;
|
|
|
|
select * from v2;
|
|
|
|
drop view v1,v2;
|
|
|
|
|
|
explain extended
|
|
with recursive
|
|
ancestors
|
|
as
|
|
(
|
|
select *
|
|
from folks
|
|
where name = 'Me' and dob = '2000-01-01'
|
|
union
|
|
select p.id, p.name, p.dob, p.father, p.mother
|
|
from folks as p, ancestors AS a
|
|
where p.id = a.father or p.id = a.mother
|
|
)
|
|
select * from ancestors;
|
|
|
|
|
|
--echo # recursive spec with two anchor selects and two recursive ones
|
|
with recursive
|
|
ancestor_ids (id)
|
|
as
|
|
(
|
|
select father from folks where name = 'Me'
|
|
union
|
|
select mother from folks where name = 'Me'
|
|
union
|
|
select father from folks, ancestor_ids a where folks.id = a.id
|
|
union
|
|
select mother from folks, ancestor_ids a where folks.id = a.id
|
|
),
|
|
ancestors
|
|
as
|
|
(
|
|
select p.* from folks as p, ancestor_ids as a
|
|
where p.id = a.id
|
|
)
|
|
select * from ancestors;
|
|
|
|
|
|
--echo # recursive spec using union all
|
|
with recursive
|
|
ancestors
|
|
as
|
|
(
|
|
select *
|
|
from folks
|
|
where name = 'Me'
|
|
union all
|
|
select p.*
|
|
from folks as p, ancestors as fa
|
|
where p.id = fa.father
|
|
union all
|
|
select p.*
|
|
from folks as p, ancestors as ma
|
|
where p.id = ma.mother
|
|
)
|
|
select * from ancestors;
|
|
|
|
|
|
--ERROR ER_NOT_STANDARD_COMPLIANT_RECURSIVE
|
|
with recursive
|
|
ancestor_ids (id, generation)
|
|
as
|
|
(
|
|
select father, 1 from folks where name = 'Me' and father is not null
|
|
union all
|
|
select mother, 1 from folks where name = 'Me' and mother is not null
|
|
union all
|
|
select father, fa.generation+1 from folks, ancestor_ids fa
|
|
where folks.id = fa.id and (father not in (select id from ancestor_ids))
|
|
union all
|
|
select mother, ma.generation+1 from folks, ancestor_ids ma
|
|
where folks.id = ma.id and (mother not in (select id from ancestor_ids))
|
|
)
|
|
select generation, name from ancestor_ids a, folks
|
|
where a.id = folks.id;
|
|
|
|
set standard_compliant_cte=0;
|
|
|
|
--ERROR ER_WITH_COL_WRONG_LIST
|
|
with recursive
|
|
ancestor_ids (id, generation)
|
|
as
|
|
(
|
|
select father from folks where name = 'Me' and father is not null
|
|
union all
|
|
select mother from folks where name = 'Me' and mother is not null
|
|
union all
|
|
select father, fa.generation+1 from folks, ancestor_ids fa
|
|
where folks.id = fa.id and (father not in (select id from ancestor_ids))
|
|
union all
|
|
select mother, ma.generation+1 from folks, ancestor_ids ma
|
|
where folks.id = ma.id and (mother not in (select id from ancestor_ids))
|
|
)
|
|
select generation, name from ancestor_ids a, folks
|
|
where a.id = folks.id;
|
|
|
|
with recursive
|
|
ancestor_ids (id, generation)
|
|
as
|
|
(
|
|
select father, 1 from folks where name = 'Me' and father is not null
|
|
union all
|
|
select mother, 1 from folks where name = 'Me' and mother is not null
|
|
union all
|
|
select father, fa.generation+1 from folks, ancestor_ids fa
|
|
where folks.id = fa.id and father is not null and
|
|
(father not in (select id from ancestor_ids))
|
|
union all
|
|
select mother, ma.generation+1 from folks, ancestor_ids ma
|
|
where folks.id = ma.id and mother is not null and
|
|
(mother not in (select id from ancestor_ids))
|
|
)
|
|
select generation, name from ancestor_ids a, folks
|
|
where a.id = folks.id;
|
|
|
|
set standard_compliant_cte=1;
|
|
|
|
--ERROR ER_NOT_STANDARD_COMPLIANT_RECURSIVE
|
|
with recursive
|
|
coupled_ancestor_ids (id)
|
|
as
|
|
(
|
|
select father from folks where name = 'Me' and father is not null
|
|
union
|
|
select mother from folks where name = 'Me' and mother is not null
|
|
union
|
|
select n.father
|
|
from folks, coupled_ancestor_ids fa, coupled_ancestor_ids ma, folks n
|
|
where folks.father = fa.id and folks.mother = ma.id and
|
|
(fa.id = n.id or ma.id = n.id) and
|
|
n.father is not null and n.mother is not null
|
|
union
|
|
select n.mother
|
|
from folks, coupled_ancestor_ids fa, coupled_ancestor_ids ma, folks n
|
|
where folks.father = fa.id and folks.mother = ma.id and
|
|
(fa.id = n.id or ma.id = n.id) and
|
|
n.father is not null and n.mother is not null
|
|
)
|
|
select p.* from coupled_ancestor_ids a, folks p
|
|
where a.id = p.id;
|
|
|
|
set statement standard_compliant_cte=0 for
|
|
with recursive
|
|
coupled_ancestor_ids (id)
|
|
as
|
|
(
|
|
select father from folks where name = 'Me' and father is not null
|
|
union
|
|
select mother from folks where name = 'Me' and mother is not null
|
|
union
|
|
select n.father
|
|
from folks, coupled_ancestor_ids fa, coupled_ancestor_ids ma, folks n
|
|
where folks.father = fa.id and folks.mother = ma.id and
|
|
(fa.id = n.id or ma.id = n.id) and
|
|
n.father is not null and n.mother is not null
|
|
union
|
|
select n.mother
|
|
from folks, coupled_ancestor_ids fa, coupled_ancestor_ids ma, folks n
|
|
where folks.father = fa.id and folks.mother = ma.id and
|
|
(fa.id = n.id or ma.id = n.id) and
|
|
n.father is not null and n.mother is not null
|
|
)
|
|
select p.* from coupled_ancestor_ids a, folks p
|
|
where a.id = p.id;
|
|
|
|
--ERROR ER_NOT_STANDARD_COMPLIANT_RECURSIVE
|
|
with recursive
|
|
ancestor_ids (id)
|
|
as
|
|
(
|
|
select father from folks where name = 'Me'
|
|
union
|
|
select mother from folks where name = 'Me'
|
|
union
|
|
select father from folks left join ancestor_ids a on folks.id = a.id
|
|
union
|
|
select mother from folks left join ancestor_ids a on folks.id = a.id
|
|
),
|
|
ancestors
|
|
as
|
|
(
|
|
select p.* from folks as p, ancestor_ids as a
|
|
where p.id = a.id
|
|
)
|
|
select * from ancestors;
|
|
|
|
set statement standard_compliant_cte=0 for
|
|
with recursive
|
|
ancestor_ids (id)
|
|
as
|
|
(
|
|
select father from folks where name = 'Me'
|
|
union
|
|
select mother from folks where name = 'Me'
|
|
union
|
|
select father from folks left join ancestor_ids a on folks.id = a.id
|
|
union
|
|
select mother from folks left join ancestor_ids a on folks.id = a.id
|
|
),
|
|
ancestors
|
|
as
|
|
(
|
|
select p.* from folks as p, ancestor_ids as a
|
|
where p.id = a.id
|
|
)
|
|
select * from ancestors;
|
|
|
|
with recursive
|
|
ancestor_ids (id, generation)
|
|
as
|
|
(
|
|
select father, 1 from folks where name = 'Me'
|
|
union
|
|
select mother, 1 from folks where name = 'Me'
|
|
union
|
|
select father, a.generation+1 from folks, ancestor_ids a
|
|
where folks.id = a.id
|
|
union
|
|
select mother, a.generation+1 from folks, ancestor_ids a
|
|
where folks.id = a.id
|
|
),
|
|
ancestors
|
|
as
|
|
(
|
|
select generation, name from folks as p, ancestor_ids as a
|
|
where p.id = a.id
|
|
)
|
|
select * from ancestors;
|
|
|
|
--ERROR ER_NOT_STANDARD_COMPLIANT_RECURSIVE
|
|
with recursive
|
|
ancestor_ids (id, generation)
|
|
as
|
|
(
|
|
select father, 1 from folks where name = 'Me'
|
|
union
|
|
select mother, 1 from folks where name = 'Me'
|
|
union
|
|
select max(father), max(a.generation)+1 from folks, ancestor_ids a
|
|
where folks.id = a.id
|
|
group by a.generation
|
|
union
|
|
select max(mother), max(a.generation)+1 from folks, ancestor_ids a
|
|
where folks.id = a.id
|
|
group by a.generation
|
|
),
|
|
ancestors
|
|
as
|
|
(
|
|
select generation, name from folks as p, ancestor_ids as a
|
|
where p.id = a.id
|
|
)
|
|
select * from ancestors;
|
|
|
|
set statement standard_compliant_cte=0 for
|
|
with recursive
|
|
ancestor_ids (id, generation)
|
|
as
|
|
(
|
|
select father, 1 from folks where name = 'Me'
|
|
union
|
|
select mother, 1 from folks where name = 'Me'
|
|
union
|
|
select max(father), a.generation+1 from folks, ancestor_ids a
|
|
where folks.id = a.id
|
|
group by a.generation
|
|
union
|
|
select max(mother), a.generation+1 from folks, ancestor_ids a
|
|
where folks.id = a.id
|
|
group by a.generation
|
|
),
|
|
ancestors
|
|
as
|
|
(
|
|
select generation, name from folks as p, ancestor_ids as a
|
|
where p.id = a.id
|
|
)
|
|
select * from ancestors;
|
|
|
|
set statement max_recursive_iterations=1 for
|
|
with recursive
|
|
ancestor_ids (id, generation)
|
|
as
|
|
(
|
|
select father, 1 from folks where name = 'Me'
|
|
union
|
|
select mother, 1 from folks where name = 'Me'
|
|
union
|
|
select father, a.generation+1 from folks, ancestor_ids a
|
|
where folks.id = a.id
|
|
union
|
|
select mother, a.generation+1 from folks, ancestor_ids a
|
|
where folks.id = a.id
|
|
),
|
|
ancestors
|
|
as
|
|
(
|
|
select generation, name from folks as p, ancestor_ids as a
|
|
where p.id = a.id
|
|
)
|
|
select * from ancestors;
|
|
|
|
--echo # query with recursive tables using key access
|
|
|
|
alter table folks add primary key (id);
|
|
|
|
explain
|
|
with recursive
|
|
ancestors
|
|
as
|
|
(
|
|
select *
|
|
from folks
|
|
where name = 'Me'
|
|
union
|
|
select p.*
|
|
from folks as p, ancestors as fa
|
|
where p.id = fa.father
|
|
union
|
|
select p.*
|
|
from folks as p, ancestors as ma
|
|
where p.id = ma.mother
|
|
)
|
|
select * from ancestors;
|
|
|
|
|
|
with recursive
|
|
ancestors
|
|
as
|
|
(
|
|
select *
|
|
from folks
|
|
where name = 'Me'
|
|
union
|
|
select p.*
|
|
from folks as p, ancestors as fa
|
|
where p.id = fa.father
|
|
union
|
|
select p.*
|
|
from folks as p, ancestors as ma
|
|
where p.id = ma.mother
|
|
)
|
|
select * from ancestors;
|
|
|
|
|
|
--echo #
|
|
--echo # EXPLAIN FORMAT=JSON on a query where one recursive CTE uses another:
|
|
--echo #
|
|
explain
|
|
with recursive
|
|
prev_gen
|
|
as
|
|
(
|
|
select folks.*
|
|
from folks, prev_gen
|
|
where folks.id=prev_gen.father or folks.id=prev_gen.mother
|
|
union
|
|
select *
|
|
from folks
|
|
where name='Me'
|
|
),
|
|
ancestors
|
|
as
|
|
(
|
|
select *
|
|
from folks
|
|
where name='Me'
|
|
union
|
|
select *
|
|
from ancestors
|
|
union
|
|
select *
|
|
from prev_gen
|
|
)
|
|
select ancestors.name, ancestors.dob from ancestors;
|
|
|
|
explain FORMAT=JSON
|
|
with recursive
|
|
prev_gen
|
|
as
|
|
(
|
|
select folks.*
|
|
from folks, prev_gen
|
|
where folks.id=prev_gen.father or folks.id=prev_gen.mother
|
|
union
|
|
select *
|
|
from folks
|
|
where name='Me'
|
|
),
|
|
ancestors
|
|
as
|
|
(
|
|
select *
|
|
from folks
|
|
where name='Me2'
|
|
union
|
|
select *
|
|
from ancestors where id < 234
|
|
union
|
|
select *
|
|
from prev_gen where id < 345
|
|
)
|
|
select ancestors.name, ancestors.dob from ancestors;
|
|
|
|
--echo #
|
|
explain format=json
|
|
with recursive
|
|
ancestor_couples(h_id, h_name, h_dob, h_father, h_mother,
|
|
w_id, w_name, w_dob, w_father, w_mother)
|
|
as
|
|
(
|
|
select h.*, w.*
|
|
from folks h, folks w, coupled_ancestors a
|
|
where a.father = h.id AND a.mother = w.id
|
|
union
|
|
select h.*, w.*
|
|
from folks v, folks h, folks w
|
|
where v.name = 'Me' and
|
|
(v.father = h.id AND v.mother= w.id)
|
|
),
|
|
coupled_ancestors (id, name, dob, father, mother)
|
|
as
|
|
(
|
|
select h_id, h_name, h_dob, h_father, h_mother
|
|
from ancestor_couples
|
|
union all
|
|
select w_id, w_name, w_dob, w_father, w_mother
|
|
from ancestor_couples
|
|
)
|
|
select h_name, h_dob, w_name, w_dob
|
|
from ancestor_couples;
|
|
|
|
|
|
create table my_ancestors
|
|
with recursive
|
|
ancestor_ids (id)
|
|
as
|
|
(
|
|
select father from folks where name = 'Me'
|
|
union
|
|
select mother from folks where name = 'Me'
|
|
union
|
|
select father from folks, ancestor_ids a where folks.id = a.id
|
|
union
|
|
select mother from folks, ancestor_ids a where folks.id = a.id
|
|
)
|
|
select p.* from folks as p, ancestor_ids as a where p.id = a.id;
|
|
|
|
select * from my_ancestors;
|
|
|
|
delete from my_ancestors;
|
|
|
|
insert into my_ancestors
|
|
with recursive
|
|
ancestor_ids (id)
|
|
as
|
|
(
|
|
select father from folks where name = 'Me'
|
|
union
|
|
select mother from folks where name = 'Me'
|
|
union
|
|
select father from folks, ancestor_ids a where folks.id = a.id
|
|
union
|
|
select mother from folks, ancestor_ids a where folks.id = a.id
|
|
)
|
|
select p.* from folks as p, ancestor_ids as a where p.id = a.id;
|
|
|
|
select * from my_ancestors;
|
|
|
|
drop table my_ancestors;
|
|
|
|
--echo #
|
|
--echo # MDEV-10883: execution of prepared statement from SELECT
|
|
--echo # with recursive CTE that renames columns
|
|
--echo #
|
|
|
|
prepare stmt from"
|
|
with recursive
|
|
ancestor_ids (id)
|
|
as
|
|
(
|
|
select father from folks where name = 'Me'
|
|
union
|
|
select mother from folks where name = 'Me'
|
|
union
|
|
select father from folks, ancestor_ids a where folks.id = a.id
|
|
union
|
|
select mother from folks, ancestor_ids a where folks.id = a.id
|
|
)
|
|
select p.* from folks as p, ancestor_ids as a where p.id = a.id;
|
|
";
|
|
execute stmt;
|
|
deallocate prepare stmt;
|
|
|
|
--echo #
|
|
--echo # MDEV-10881: execution of prepared statement from
|
|
--echo # CREATE ... SELECT, INSERT ... SELECT
|
|
--echo #
|
|
|
|
prepare stmt from"
|
|
create table my_ancestors
|
|
with recursive
|
|
ancestor_ids (id)
|
|
as
|
|
(
|
|
select father from folks where name = 'Me'
|
|
union
|
|
select mother from folks where name = 'Me'
|
|
union
|
|
select father from folks, ancestor_ids a where folks.id = a.id
|
|
union
|
|
select mother from folks, ancestor_ids a where folks.id = a.id
|
|
)
|
|
select p.* from folks as p, ancestor_ids as a where p.id = a.id;
|
|
";
|
|
execute stmt;
|
|
deallocate prepare stmt;
|
|
select * from my_ancestors;
|
|
|
|
delete from my_ancestors;
|
|
|
|
prepare stmt from"
|
|
insert into my_ancestors
|
|
with recursive
|
|
ancestor_ids (id)
|
|
as
|
|
(
|
|
select father from folks where name = 'Me'
|
|
union
|
|
select mother from folks where name = 'Me'
|
|
union
|
|
select father from folks, ancestor_ids a where folks.id = a.id
|
|
union
|
|
select mother from folks, ancestor_ids a where folks.id = a.id
|
|
)
|
|
select p.* from folks as p, ancestor_ids as a where p.id = a.id;
|
|
";
|
|
execute stmt;
|
|
deallocate prepare stmt;
|
|
select * from my_ancestors;
|
|
|
|
drop table my_ancestors;
|
|
|
|
--echo #
|
|
--echo # MDEV-10933: WITH clause together with SELECT in parenthesis
|
|
--echo # CREATE SELECT
|
|
--echo #
|
|
|
|
create table my_ancestors
|
|
(
|
|
with recursive
|
|
ancestor_ids (id)
|
|
as
|
|
(
|
|
select father from folks where name = 'Me'
|
|
union
|
|
select mother from folks where name = 'Me'
|
|
union
|
|
select father from folks, ancestor_ids a where folks.id = a.id
|
|
union
|
|
select mother from folks, ancestor_ids a where folks.id = a.id
|
|
)
|
|
select p.* from folks as p, ancestor_ids as a where p.id = a.id
|
|
);
|
|
select * from my_ancestors;
|
|
drop table my_ancestors;
|
|
|
|
drop table folks;
|
|
|
|
--echo #
|
|
--echo # MDEV-10372: [bb-10.2-mdev9864 tree] EXPLAIN with recursive CTE enters endless recursion
|
|
--echo #
|
|
create table t1(a int);
|
|
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
|
|
explain format=json
|
|
with recursive t as (select a from t1 union select a+10 from t where a < 1000)
|
|
select * from t;
|
|
|
|
drop table t1;
|
|
|
|
|
|
--echo #
|
|
--echo # MDEV-10737: recursive union with several anchors at the end
|
|
--echo #
|
|
|
|
WITH RECURSIVE cte(n) AS
|
|
( SELECT n+1 FROM cte WHERE n < 5 UNION SELECT 1 UNION SELECT 1 )
|
|
SELECT * FROM cte;
|
|
|
|
--echo #
|
|
--echo # MDEV-10736: recursive definition with anchor over a table with blob
|
|
--echo #
|
|
|
|
CREATE TABLE t1 (f VARCHAR(1024));
|
|
WITH RECURSIVE cte(f) AS
|
|
(SELECT t1.f FROM t1 UNION ALL SELECT cte.f FROM cte)
|
|
SELECT * FROM cte as t;
|
|
DROP TABLE t1;
|
|
|
|
--echo #
|
|
--echo # MDEV-10899: mergeable derived in the spec of recursive CTE
|
|
--echo #
|
|
|
|
create table t1 (a int);
|
|
insert into t1 values
|
|
(0), (1), (2), (3), (4);
|
|
create table t2 (a int);
|
|
insert into t2 values
|
|
(1), (2), (3), (4), (5);
|
|
|
|
with recursive
|
|
t1 as
|
|
(
|
|
select x.a from (select a from t2 where t2.a=3) x
|
|
union
|
|
select t2.a from t1,t2 where t1.a+1=t2.a
|
|
)
|
|
select * from t1;
|
|
|
|
explain
|
|
with recursive
|
|
t1 as
|
|
(
|
|
select x.a from (select a from t2 where t2.a=3) x
|
|
union
|
|
select t2.a from t1,t2 where t1.a+1=t2.a
|
|
)
|
|
select * from t1;
|
|
|
|
drop table t1,t2;
|
|
|
|
--echo #
|
|
--echo # MDEV-11278: non-mergeable view in the spec of recursive CTE
|
|
--echo #
|
|
|
|
create table t1 (a int);
|
|
insert into t1 values
|
|
(0), (1), (2), (3), (4);
|
|
create table t2 (a int);
|
|
insert into t2 values
|
|
(1), (2), (3), (4), (5);
|
|
|
|
create view v1 as
|
|
select a from t2 where a < 3
|
|
union
|
|
select a from t2 where a > 4;
|
|
|
|
with recursive
|
|
t1 as
|
|
(
|
|
select a from v1 where a=1
|
|
union
|
|
select v1.a from t1,v1 where t1.a+1=v1.a
|
|
)
|
|
select * from t1;
|
|
|
|
drop view v1;
|
|
drop table t1,t2;
|
|
|
|
|
|
--echo #
|
|
--echo # MDEV-11259: recursive CTE with concatenation operation
|
|
--echo #
|
|
|
|
DROP TABLE IF EXISTS edges;
|
|
CREATE TABLE edges(
|
|
a int(10) unsigned NOT NULL,
|
|
b int(10) unsigned NOT NULL,
|
|
PRIMARY KEY (a,b),
|
|
KEY b(b)
|
|
);
|
|
|
|
INSERT INTO edges
|
|
VALUES (1,3),(2,1),(2,4),(3,4),(3,5),(3,6),(4,7),(5,1),(5,6),(6,1);
|
|
|
|
DROP TABLE IF EXISTS edges2;
|
|
CREATE VIEW edges2 (a, b) AS
|
|
SELECT a, b FROM edges UNION ALL SELECT b, a FROM edges;
|
|
|
|
--sorted_result
|
|
WITH RECURSIVE transitive_closure(a, b, distance, path_string) AS
|
|
( SELECT a, b, 1 AS distance,
|
|
concat(a, '.', b, '.') AS path_string
|
|
FROM edges
|
|
|
|
UNION ALL
|
|
|
|
SELECT tc.a, e.b, tc.distance + 1,
|
|
concat(tc.path_string, e.b, '.') AS path_string
|
|
FROM edges AS e
|
|
JOIN transitive_closure AS tc
|
|
ON e.a = tc.b
|
|
WHERE tc.path_string NOT LIKE concat('%', e.b, '.%')
|
|
)
|
|
SELECT * FROM transitive_closure
|
|
ORDER BY a, b, distance;
|
|
|
|
--sorted_result
|
|
WITH RECURSIVE transitive_closure(a, b, distance, path_string) AS
|
|
( SELECT a, b, 1 AS distance,
|
|
concat(a, '.', b, '.') AS path_string
|
|
FROM edges
|
|
WHERE a = 1 -- source
|
|
|
|
UNION ALL
|
|
|
|
SELECT tc.a, e.b, tc.distance + 1,
|
|
concat(tc.path_string, e.b, '.') AS path_string
|
|
FROM edges AS e
|
|
JOIN transitive_closure AS tc ON e.a = tc.b
|
|
WHERE tc.path_string NOT LIKE concat('%', e.b, '.%')
|
|
)
|
|
SELECT * FROM transitive_closure
|
|
WHERE b = 6 -- destination
|
|
ORDER BY a, b, distance;
|
|
|
|
--sorted_result
|
|
WITH RECURSIVE transitive_closure(a, b, distance, path_string) AS
|
|
( SELECT a, b, 1 AS distance,
|
|
concat(a, '.', b, '.') AS path_string
|
|
FROM edges2
|
|
|
|
UNION ALL
|
|
|
|
SELECT tc.a, e.b, tc.distance + 1,
|
|
concat(tc.path_string, e.b, '.') AS path_string
|
|
FROM edges2 AS e
|
|
JOIN transitive_closure AS tc ON e.a = tc.b
|
|
WHERE tc.path_string NOT LIKE concat('%', e.b, '.%')
|
|
)
|
|
SELECT * FROM transitive_closure
|
|
ORDER BY a, b, distance;
|
|
|
|
--sorted_result
|
|
WITH RECURSIVE transitive_closure(a, b, distance, path_string)
|
|
AS
|
|
( SELECT a, b, 1 AS distance,
|
|
concat(a, '.', b, '.') AS path_string
|
|
FROM edges2
|
|
|
|
UNION ALL
|
|
|
|
SELECT tc.a, e.b, tc.distance + 1,
|
|
concat(tc.path_string, e.b, '.') AS path_string
|
|
FROM edges2 AS e
|
|
JOIN transitive_closure AS tc ON e.a = tc.b
|
|
WHERE tc.path_string NOT LIKE concat('%', e.b, '.%')
|
|
)
|
|
SELECT a, b, min(distance) AS dist FROM transitive_closure
|
|
GROUP BY a, b
|
|
ORDER BY a, dist, b;
|
|
|
|
DROP VIEW edges2;
|
|
DROP TABLE edges;
|
|
|
|
|
|
--echo #
|
|
--echo # MDEV-11674: recursive CTE table that cannot be stored
|
|
--echo # in a heap table
|
|
--echo #
|
|
|
|
create table t1 (id int, test_data varchar(36));
|
|
|
|
insert into t1(id, test_data)
|
|
select id, test_data
|
|
from (
|
|
with recursive data_generator(id, test_data) as (
|
|
select 1 as id, uuid() as test_data
|
|
union all
|
|
select id + 1, uuid() from data_generator where id < 150000
|
|
)
|
|
select * from data_generator
|
|
) as a;
|
|
|
|
drop table t1;
|
|
|
|
--echo #
|
|
--echo # MDEV-10773: ANALYZE for query with recursive CTE
|
|
--echo #
|
|
|
|
--source include/analyze-format.inc
|
|
analyze format=json
|
|
with recursive src(counter) as
|
|
(select 1
|
|
union
|
|
select counter+1 from src where counter<10
|
|
) select * from src;
|
|
|
|
--echo #
|
|
--echo # mdev-12360: recursive reference in left operand of LEFT JOIN
|
|
--echo #
|
|
|
|
create table folks(id int, name char(32), dob date, father int, mother int);
|
|
|
|
insert into folks values
|
|
(100, 'Me', '2000-01-01', 20, 30),
|
|
(20, 'Dad', '1970-02-02', 10, 9),
|
|
(30, 'Mom', '1975-03-03', 8, 7),
|
|
(10, 'Grandpa Bill', '1940-04-05', null, null),
|
|
(9, 'Grandma Ann', '1941-10-15', null, null),
|
|
(25, 'Uncle Jim', '1968-11-18', 8, 7),
|
|
(98, 'Sister Amy', '2001-06-20', 20, 30),
|
|
(7, 'Grandma Sally', '1943-08-23', null, 6),
|
|
(8, 'Grandpa Ben', '1940-10-21', null, null),
|
|
(6, 'Grandgrandma Martha', '1923-05-17', null, null),
|
|
(67, 'Cousin Eddie', '1992-02-28', 25, 27),
|
|
(27, 'Auntie Melinda', '1971-03-29', null, null);
|
|
|
|
with recursive
|
|
ancestor_ids (id)
|
|
as
|
|
(
|
|
select father from folks where name = 'Me'
|
|
union
|
|
select mother from folks where name = 'Me'
|
|
union
|
|
select father from ancestor_ids as a left join folks on folks.id = a.id
|
|
union
|
|
select mother from ancestor_ids as a left join folks on folks.id = a.id
|
|
),
|
|
ancestors
|
|
as
|
|
(
|
|
select p.* from folks as p, ancestor_ids as a
|
|
where p.id = a.id
|
|
)
|
|
select * from ancestors;
|
|
|
|
drop table folks;
|