def test_recursive(self):
upto10 = With('n', recursive=True)
upto10.query = Values([(1, )])
upto10.query |= upto10.select(upto10.n + Literal(1),
where=upto10.n < Literal(100))
upto10.query.all_ = True
q = upto10.select(with_=[upto10])
self.assertEqual(
str(q), 'WITH RECURSIVE "a" ("n") AS ('
'VALUES (%s) '
'UNION ALL '
'SELECT ("a"."n" + %s) FROM "a" AS "a" WHERE ("a"."n" < %s)'
') SELECT * FROM "a" AS "a"')
self.assertEqual(q.params, (1, 1, 100))
def test_recursive(self):
upto10 = With('n', recursive=True)
upto10.query = Values([(1,)])
upto10.query |= upto10.select(
upto10.n + Literal(1),
where=upto10.n < Literal(100))
upto10.query.all_ = True
q = upto10.select(with_=[upto10])
self.assertEqual(str(q),
'WITH RECURSIVE "a"("n") AS ('
'VALUES (%s) '
'UNION ALL '
'SELECT ("a"."n" + %s) FROM "a" AS "a" WHERE ("a"."n" < %s)'
') SELECT * FROM "a" AS "a"')
self.assertEqual(q.params, (1, 1, 100))
def convert_domain_tree(self, domain, tables):
Target = self.get_target()
target = Target.__table__()
table, _ = tables[None]
name, operator, ids = domain
red_sql = reduce_ids(target.id, (i for i in ids if i is not None))
if operator.endswith('child_of'):
tree = With('id', recursive=True)
tree.query = target.select(target.id, where=red_sql)
tree.query |= (target
.join(tree, condition=Column(target, name) == tree.id)
.select(target.id))
else:
tree = With('id', name, recursive=True)
tree.query = target.select(
target.id, Column(target, name), where=red_sql)
tree.query |= (target
.join(tree, condition=target.id == Column(tree, name))
.select(target.id, Column(target, name)))
expression = table.id.in_(tree.select(tree.id, with_=[tree]))
if operator.startswith('not'):
return ~expression
return expression
def test_with(self):
w = With(query=self.table.select(self.table.c1))
query = w.select(with_=[w])
self.assertEqual(
str(query), 'WITH "a" AS (SELECT "b"."c1" FROM "t" AS "b") '
'SELECT * FROM "a" AS "a"')
self.assertEqual(query.params, ())
def test_with(self):
w = With(query=self.table.select(self.table.c1))
query = w.select(with_=[w])
self.assertEqual(str(query),
'WITH "a" AS (SELECT "b"."c1" FROM "t" AS "b") '
'SELECT * FROM "a" AS "a"')
self.assertEqual(query.params, ())
def test_with(self):
t1 = Table('t1')
w = With(query=t1.select(t1.c1))
query = self.table.delete(with_=[w],
where=self.table.c2.in_(w.select(w.c3)))
self.assertEqual(str(query),
'WITH a AS (SELECT "b"."c1" FROM "t1" AS "b") '
'DELETE FROM "t" WHERE ("c2" IN (SELECT "a"."c3" FROM a AS "a"))')
self.assertEqual(query.params, ())
def test_with(self):
t1 = Table('t1')
w = With(query=t1.select())
query = self.table.insert([self.table.c1],
with_=[w],
values=w.select())
self.assertEqual(
str(query), 'WITH "a" AS (SELECT * FROM "t1" AS "b") '
'INSERT INTO "t" ("c1") SELECT * FROM "a" AS "a"')
self.assertEqual(query.params, ())
def test_with(self):
t1 = Table('t1')
w = With(query=t1.select(t1.c1))
query = self.table.delete(with_=[w],
where=self.table.c2.in_(w.select(w.c3)))
self.assertEqual(str(query),
'WITH "a" AS (SELECT "b"."c1" FROM "t1" AS "b") '
'DELETE FROM "t" WHERE '
'("c2" IN (SELECT "a"."c3" FROM "a" AS "a"))')
self.assertEqual(query.params, ())
def test_with(self):
t1 = Table('t1')
w = With(query=t1.select(t1.c1))
query = self.table.update([self.table.c2],
with_=[w],
values=[w.select(w.c3, where=w.c4 == 2)])
self.assertEqual(
str(query), 'WITH "b" AS (SELECT "c"."c1" FROM "t1" AS "c") '
'UPDATE "t" SET "c2" = (SELECT "b"."c3" FROM "b" AS "b" '
'WHERE ("b"."c4" = %s))')
self.assertEqual(query.params, (2, ))
def test_with(self):
t1 = Table('t1')
w = With(query=t1.select())
query = self.table.insert(
[self.table.c1],
with_=[w],
values=w.select())
self.assertEqual(str(query),
'WITH "a" AS (SELECT * FROM "t1" AS "b") '
'INSERT INTO "t" ("c1") SELECT * FROM "a" AS "a"')
self.assertEqual(query.params, ())
def pull(cls, database, connection, name=None):
cursor = connection.cursor()
queue = cls.__table__()
candidates = With('id', 'scheduled_at', 'expected_at',
query=queue.select(
queue.id,
queue.scheduled_at,
queue.expected_at,
where=((queue.name == name) if name else Literal(True))
& (queue.dequeued_at == Null),
order_by=[
queue.scheduled_at.nulls_first,
queue.expected_at.nulls_first]))
selected = With('id', query=candidates.select(
candidates.id,
where=((candidates.scheduled_at <= CurrentTimestamp())
| (candidates.scheduled_at == Null))
& database.lock_id(candidates.id),
order_by=[
candidates.scheduled_at.nulls_first,
candidates.expected_at.nulls_first],
limit=1))
next_timeout = With('seconds', query=candidates.select(
Min(Extract('second',
candidates.scheduled_at - CurrentTimestamp())
),
where=candidates.scheduled_at >= CurrentTimestamp()))
task_id, seconds = None, None
if database.has_returning():
query = queue.update([queue.dequeued_at], [CurrentTimestamp()],
where=queue.id == selected.select(selected.id),
with_=[candidates, selected, next_timeout],
returning=[
queue.id, next_timeout.select(next_timeout.seconds)])
cursor.execute(*query)
row = cursor.fetchone()
if row:
task_id, seconds = row
else:
query = queue.select(queue.id,
where=queue.id == selected.select(selected.id),
with_=[candidates, selected])
cursor.execute(*query)
row = cursor.fetchone()
if row:
task_id, = row
query = queue.update([queue.dequeued_at], [CurrentTimestamp()],
where=queue.id == task_id)
cursor.execute(*query)
query = next_timeout.select(next_timeout.seconds)
cursor.execute(*query)
row = cursor.fetchone()
if row:
seconds, = row
if not task_id and database.has_channel():
cursor.execute('LISTEN "%s"', (cls.__name__,))
return task_id, seconds
def test_with(self):
t1 = Table('t1')
w = With(query=t1.select(t1.c1))
query = self.table.update(
[self.table.c2],
with_=[w],
values=[w.select(w.c3, where=w.c4 == 2)])
self.assertEqual(str(query),
'WITH b AS (SELECT "c"."c1" FROM "t1" AS "c") '
'UPDATE "t" SET "c2" = (SELECT "b"."c3" FROM b AS "b" '
'WHERE ("b"."c4" = %s))')
self.assertEqual(query.params, (2,))
def test_with_query(self):
with AliasManager():
simple = With()
simple.query = self.table.select(self.table.id,
where=self.table.id == 1)
second = With()
second.query = simple.select()
wq = WithQuery(with_=[simple, second])
self.assertEqual(wq._with_str(),
'WITH "a" AS ('
'SELECT "b"."id" FROM "t" AS "b" WHERE ("b"."id" = %s)'
'), "c" AS ('
'SELECT * FROM "a" AS "a"'
') ')
self.assertEqual(wq._with_params(), (1,))
def test_with_query(self):
with AliasManager():
simple = With()
simple.query = self.table.select(self.table.id,
where=self.table.id == 1)
second = With()
second.query = simple.select()
wq = WithQuery(with_=[simple, second])
self.assertEqual(
wq._with_str(), 'WITH "a" AS ('
'SELECT "b"."id" FROM "t" AS "b" WHERE ("b"."id" = %s)'
'), "c" AS ('
'SELECT * FROM "a" AS "a"'
') ')
self.assertEqual(wq._with_params(), (1, ))