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