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|
from .. import fixtures, config
from ..assertions import eq_
from sqlalchemy import util
from sqlalchemy import Integer, String, select, func, bindparam, union, tuple_
from sqlalchemy import testing
from ..schema import Table, Column
class OrderByLabelTest(fixtures.TablesTest):
"""Test the dialect sends appropriate ORDER BY expressions when
labels are used.
This essentially exercises the "supports_simple_order_by_label"
setting.
"""
__backend__ = True
@classmethod
def define_tables(cls, metadata):
Table("some_table", metadata,
Column('id', Integer, primary_key=True),
Column('x', Integer),
Column('y', Integer),
Column('q', String(50)),
Column('p', String(50))
)
@classmethod
def insert_data(cls):
config.db.execute(
cls.tables.some_table.insert(),
[
{"id": 1, "x": 1, "y": 2, "q": "q1", "p": "p3"},
{"id": 2, "x": 2, "y": 3, "q": "q2", "p": "p2"},
{"id": 3, "x": 3, "y": 4, "q": "q3", "p": "p1"},
]
)
def _assert_result(self, select, result):
eq_(
config.db.execute(select).fetchall(),
result
)
def test_plain(self):
table = self.tables.some_table
lx = table.c.x.label('lx')
self._assert_result(
select([lx]).order_by(lx),
[(1, ), (2, ), (3, )]
)
def test_composed_int(self):
table = self.tables.some_table
lx = (table.c.x + table.c.y).label('lx')
self._assert_result(
select([lx]).order_by(lx),
[(3, ), (5, ), (7, )]
)
def test_composed_multiple(self):
table = self.tables.some_table
lx = (table.c.x + table.c.y).label('lx')
ly = (func.lower(table.c.q) + table.c.p).label('ly')
self._assert_result(
select([lx, ly]).order_by(lx, ly.desc()),
[(3, util.u('q1p3')), (5, util.u('q2p2')), (7, util.u('q3p1'))]
)
def test_plain_desc(self):
table = self.tables.some_table
lx = table.c.x.label('lx')
self._assert_result(
select([lx]).order_by(lx.desc()),
[(3, ), (2, ), (1, )]
)
def test_composed_int_desc(self):
table = self.tables.some_table
lx = (table.c.x + table.c.y).label('lx')
self._assert_result(
select([lx]).order_by(lx.desc()),
[(7, ), (5, ), (3, )]
)
def test_group_by_composed(self):
table = self.tables.some_table
expr = (table.c.x + table.c.y).label('lx')
stmt = select([func.count(table.c.id), expr]).group_by(expr).order_by(expr)
self._assert_result(
stmt,
[(1, 3), (1, 5), (1, 7)]
)
class LimitOffsetTest(fixtures.TablesTest):
__backend__ = True
@classmethod
def define_tables(cls, metadata):
Table("some_table", metadata,
Column('id', Integer, primary_key=True),
Column('x', Integer),
Column('y', Integer))
@classmethod
def insert_data(cls):
config.db.execute(
cls.tables.some_table.insert(),
[
{"id": 1, "x": 1, "y": 2},
{"id": 2, "x": 2, "y": 3},
{"id": 3, "x": 3, "y": 4},
{"id": 4, "x": 4, "y": 5},
]
)
def _assert_result(self, select, result, params=()):
eq_(
config.db.execute(select, params).fetchall(),
result
)
def test_simple_limit(self):
table = self.tables.some_table
self._assert_result(
select([table]).order_by(table.c.id).limit(2),
[(1, 1, 2), (2, 2, 3)]
)
@testing.requires.offset
def test_simple_offset(self):
table = self.tables.some_table
self._assert_result(
select([table]).order_by(table.c.id).offset(2),
[(3, 3, 4), (4, 4, 5)]
)
@testing.requires.offset
def test_simple_limit_offset(self):
table = self.tables.some_table
self._assert_result(
select([table]).order_by(table.c.id).limit(2).offset(1),
[(2, 2, 3), (3, 3, 4)]
)
@testing.requires.offset
def test_limit_offset_nobinds(self):
"""test that 'literal binds' mode works - no bound params."""
table = self.tables.some_table
stmt = select([table]).order_by(table.c.id).limit(2).offset(1)
sql = stmt.compile(
dialect=config.db.dialect,
compile_kwargs={"literal_binds": True})
sql = str(sql)
self._assert_result(
sql,
[(2, 2, 3), (3, 3, 4)]
)
@testing.requires.bound_limit_offset
def test_bound_limit(self):
table = self.tables.some_table
self._assert_result(
select([table]).order_by(table.c.id).limit(bindparam('l')),
[(1, 1, 2), (2, 2, 3)],
params={"l": 2}
)
@testing.requires.bound_limit_offset
def test_bound_offset(self):
table = self.tables.some_table
self._assert_result(
select([table]).order_by(table.c.id).offset(bindparam('o')),
[(3, 3, 4), (4, 4, 5)],
params={"o": 2}
)
@testing.requires.bound_limit_offset
def test_bound_limit_offset(self):
table = self.tables.some_table
self._assert_result(
select([table]).order_by(table.c.id).
limit(bindparam("l")).offset(bindparam("o")),
[(2, 2, 3), (3, 3, 4)],
params={"l": 2, "o": 1}
)
class CompoundSelectTest(fixtures.TablesTest):
__backend__ = True
@classmethod
def define_tables(cls, metadata):
Table("some_table", metadata,
Column('id', Integer, primary_key=True),
Column('x', Integer),
Column('y', Integer))
@classmethod
def insert_data(cls):
config.db.execute(
cls.tables.some_table.insert(),
[
{"id": 1, "x": 1, "y": 2},
{"id": 2, "x": 2, "y": 3},
{"id": 3, "x": 3, "y": 4},
{"id": 4, "x": 4, "y": 5},
]
)
def _assert_result(self, select, result, params=()):
eq_(
config.db.execute(select, params).fetchall(),
result
)
def test_plain_union(self):
table = self.tables.some_table
s1 = select([table]).where(table.c.id == 2)
s2 = select([table]).where(table.c.id == 3)
u1 = union(s1, s2)
self._assert_result(
u1.order_by(u1.c.id),
[(2, 2, 3), (3, 3, 4)]
)
def test_select_from_plain_union(self):
table = self.tables.some_table
s1 = select([table]).where(table.c.id == 2)
s2 = select([table]).where(table.c.id == 3)
u1 = union(s1, s2).alias().select()
self._assert_result(
u1.order_by(u1.c.id),
[(2, 2, 3), (3, 3, 4)]
)
@testing.requires.order_by_col_from_union
@testing.requires.parens_in_union_contained_select_w_limit_offset
def test_limit_offset_selectable_in_unions(self):
table = self.tables.some_table
s1 = select([table]).where(table.c.id == 2).\
limit(1).order_by(table.c.id)
s2 = select([table]).where(table.c.id == 3).\
limit(1).order_by(table.c.id)
u1 = union(s1, s2).limit(2)
self._assert_result(
u1.order_by(u1.c.id),
[(2, 2, 3), (3, 3, 4)]
)
@testing.requires.parens_in_union_contained_select_wo_limit_offset
def test_order_by_selectable_in_unions(self):
table = self.tables.some_table
s1 = select([table]).where(table.c.id == 2).\
order_by(table.c.id)
s2 = select([table]).where(table.c.id == 3).\
order_by(table.c.id)
u1 = union(s1, s2).limit(2)
self._assert_result(
u1.order_by(u1.c.id),
[(2, 2, 3), (3, 3, 4)]
)
def test_distinct_selectable_in_unions(self):
table = self.tables.some_table
s1 = select([table]).where(table.c.id == 2).\
distinct()
s2 = select([table]).where(table.c.id == 3).\
distinct()
u1 = union(s1, s2).limit(2)
self._assert_result(
u1.order_by(u1.c.id),
[(2, 2, 3), (3, 3, 4)]
)
@testing.requires.parens_in_union_contained_select_w_limit_offset
def test_limit_offset_in_unions_from_alias(self):
table = self.tables.some_table
s1 = select([table]).where(table.c.id == 2).\
limit(1).order_by(table.c.id)
s2 = select([table]).where(table.c.id == 3).\
limit(1).order_by(table.c.id)
# this necessarily has double parens
u1 = union(s1, s2).alias()
self._assert_result(
u1.select().limit(2).order_by(u1.c.id),
[(2, 2, 3), (3, 3, 4)]
)
def test_limit_offset_aliased_selectable_in_unions(self):
table = self.tables.some_table
s1 = select([table]).where(table.c.id == 2).\
limit(1).order_by(table.c.id).alias().select()
s2 = select([table]).where(table.c.id == 3).\
limit(1).order_by(table.c.id).alias().select()
u1 = union(s1, s2).limit(2)
self._assert_result(
u1.order_by(u1.c.id),
[(2, 2, 3), (3, 3, 4)]
)
class ExpandingBoundInTest(fixtures.TablesTest):
__backend__ = True
@classmethod
def define_tables(cls, metadata):
Table("some_table", metadata,
Column('id', Integer, primary_key=True),
Column('x', Integer),
Column('y', Integer))
@classmethod
def insert_data(cls):
config.db.execute(
cls.tables.some_table.insert(),
[
{"id": 1, "x": 1, "y": 2},
{"id": 2, "x": 2, "y": 3},
{"id": 3, "x": 3, "y": 4},
{"id": 4, "x": 4, "y": 5},
]
)
def _assert_result(self, select, result, params=()):
eq_(
config.db.execute(select, params).fetchall(),
result
)
def test_bound_in_scalar(self):
table = self.tables.some_table
stmt = select([table.c.id]).where(
table.c.x.in_(bindparam('q', expanding=True)))
self._assert_result(
stmt,
[(2, ), (3, ), (4, )],
params={"q": [2, 3, 4]},
)
@testing.requires.tuple_in
def test_bound_in_two_tuple(self):
table = self.tables.some_table
stmt = select([table.c.id]).where(
tuple_(table.c.x, table.c.y).in_(bindparam('q', expanding=True)))
self._assert_result(
stmt,
[(2, ), (3, ), (4, )],
params={"q": [(2, 3), (3, 4), (4, 5)]},
)
|
