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+# testing/suite/test_deprecations.py
+# Copyright (C) 2005-2024 the SQLAlchemy authors and contributors
+# <see AUTHORS file>
+#
+# This module is part of SQLAlchemy and is released under
+# the MIT License: https://www.opensource.org/licenses/mit-license.php
+# mypy: ignore-errors
+
+from .. import fixtures
+from ..assertions import eq_
+from ..schema import Column
+from ..schema import Table
+from ... import Integer
+from ... import select
+from ... import testing
+from ... import union
+
+
+class DeprecatedCompoundSelectTest(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, connection):
+ connection.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, conn, select, result, params=()):
+ eq_(conn.execute(select, params).fetchall(), result)
+
+ def test_plain_union(self, connection):
+ 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)
+ with testing.expect_deprecated(
+ "The SelectBase.c and SelectBase.columns "
+ "attributes are deprecated"
+ ):
+ self._assert_result(
+ connection, u1.order_by(u1.c.id), [(2, 2, 3), (3, 3, 4)]
+ )
+
+ # note we've had to remove one use case entirely, which is this
+ # one. the Select gets its FROMS from the WHERE clause and the
+ # columns clause, but not the ORDER BY, which means the old ".c" system
+ # allowed you to "order_by(s.c.foo)" to get an unnamed column in the
+ # ORDER BY without adding the SELECT into the FROM and breaking the
+ # query. Users will have to adjust for this use case if they were doing
+ # it before.
+ def _dont_test_select_from_plain_union(self, connection):
+ 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()
+ with testing.expect_deprecated(
+ "The SelectBase.c and SelectBase.columns "
+ "attributes are deprecated"
+ ):
+ self._assert_result(
+ connection, 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, connection):
+ 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)
+ with testing.expect_deprecated(
+ "The SelectBase.c and SelectBase.columns "
+ "attributes are deprecated"
+ ):
+ self._assert_result(
+ connection, 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, connection):
+ 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)
+ with testing.expect_deprecated(
+ "The SelectBase.c and SelectBase.columns "
+ "attributes are deprecated"
+ ):
+ self._assert_result(
+ connection, u1.order_by(u1.c.id), [(2, 2, 3), (3, 3, 4)]
+ )
+
+ def test_distinct_selectable_in_unions(self, connection):
+ 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)
+ with testing.expect_deprecated(
+ "The SelectBase.c and SelectBase.columns "
+ "attributes are deprecated"
+ ):
+ self._assert_result(
+ connection, u1.order_by(u1.c.id), [(2, 2, 3), (3, 3, 4)]
+ )
+
+ def test_limit_offset_aliased_selectable_in_unions(self, connection):
+ 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)
+ with testing.expect_deprecated(
+ "The SelectBase.c and SelectBase.columns "
+ "attributes are deprecated"
+ ):
+ self._assert_result(
+ connection, u1.order_by(u1.c.id), [(2, 2, 3), (3, 3, 4)]
+ )