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Fixed many problems in the code of With_element::check_unrestricted_recursive().

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Added the check whether there are set functions in the specifications of recursive CTE.
Added the check whether there are recursive references in subqueries.
Introduced boolean system variable 'standards_compliant_cte'. By default it's set to 'on'.
When it's set to 'off' non-standard compliant CTE can be executed.
This commit is contained in:
Galina Shalygina
2016-05-19 22:07:53 +03:00
parent 3b47632bfc
commit 46a2e41398
13 changed files with 675 additions and 52 deletions
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267
mysql-test/t/cte_recursive.test
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@@ -34,7 +34,8 @@ insert into folks values
(9, 'Grandma Ann', '1941-10-15', null, null),
(25, 'Uncle Jim', '1968-11-18', 8, 7),
(98, 'Sister Amy', '2001-06-20', 20, 30),
(8, 'Grandma Sally', '1943-08-23', 5, 6),
(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);
@@ -320,5 +321,269 @@ as
select * from ancestors;
with recursive
ancestor_ids (id)
as
(
select father from folks where name = 'Vasya'
union
select mother from folks where name = 'Vasya'
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;
with recursive
ancestors
as
(
select *
from folks
where name = 'Vasya'
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_STANDARDS_COMPLIANT_RECURSIVE
with recursive
ancestor_ids (id, generation)
as
(
select father, 1 from folks where name = 'Vasya' and father is not null
union all
select mother, 1 from folks where name = 'Vasya' 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 standards_compliant_cte=0;
set optimizer_switch='materialization=off,subquery_cache=off';
--ERROR ER_WITH_COL_WRONG_LIST
with recursive
ancestor_ids (id, generation)
as
(
select father from folks where name = 'Vasya' and father is not null
union all
select mother from folks where name = 'Vasya' 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 = 'Vasya' and father is not null
union all
select mother, 1 from folks where name = 'Vasya' 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 optimizer_switch=default;
set standards_compliant_cte=1;
--ERROR ER_NOT_STANDARDS_COMPLIANT_RECURSIVE
with recursive
coupled_ancestor_ids (id)
as
(
select father from folks where name = 'Vasya' and father is not null
union
select mother from folks where name = 'Vasya' 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 standards_compliant_cte=0 for
with recursive
coupled_ancestor_ids (id)
as
(
select father from folks where name = 'Vasya' and father is not null
union
select mother from folks where name = 'Vasya' 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_STANDARDS_COMPLIANT_RECURSIVE
with recursive
ancestor_ids (id)
as
(
select father from folks where name = 'Vasya'
union
select mother from folks where name = 'Vasya'
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 standards_compliant_cte=0 for
with recursive
ancestor_ids (id)
as
(
select father from folks where name = 'Vasya'
union
select mother from folks where name = 'Vasya'
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 = 'Vasya'
union
select mother, 1 from folks where name = 'Vasya'
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_STANDARDS_COMPLIANT_RECURSIVE
with recursive
ancestor_ids (id, generation)
as
(
select father, 1 from folks where name = 'Vasya'
union
select mother, 1 from folks where name = 'Vasya'
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 standards_compliant_cte=0 for
with recursive
ancestor_ids (id, generation)
as
(
select father, 1 from folks where name = 'Vasya'
union
select mother, 1 from folks where name = 'Vasya'
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;
drop table folks;