from sqlalchemy import Table, Column, Integer, MetaData, ForeignKey, select from sqlalchemy.testing import fixtures, AssertsCompiledSQL, eq_ from sqlalchemy import util from sqlalchemy.engine import default from sqlalchemy import testing m = MetaData() a = Table('a', m, Column('id', Integer, primary_key=True) ) b = Table('b', m, Column('id', Integer, primary_key=True), Column('a_id', Integer, ForeignKey('a.id')) ) c = Table('c', m, Column('id', Integer, primary_key=True), Column('b_id', Integer, ForeignKey('b.id')) ) d = Table('d', m, Column('id', Integer, primary_key=True), Column('c_id', Integer, ForeignKey('c.id')) ) e = Table('e', m, Column('id', Integer, primary_key=True) ) b_key = Table('b_key', m, Column('id', Integer, primary_key=True, key='bid'), ) a_to_b_key = Table('a_to_b_key', m, Column('aid', Integer, ForeignKey('a.id')), Column('bid', Integer, ForeignKey('b_key.bid')), ) class _JoinRewriteTestBase(AssertsCompiledSQL): def _test(self, s, assert_): self.assert_compile( s, assert_ ) compiled = s.compile(dialect=self.__dialect__) # column name should be in result map, as we never render # .key in SQL for key, col in zip([c.name for c in s.c], s.inner_columns): key = key % compiled.anon_map assert col in compiled.result_map[key][1] def test_a_bc(self): j1 = b.join(c) j2 = a.join(j1) # TODO: if we remove 'b' or 'c', shouldn't we get just # the subset of cols from anon_1 ? # TODO: do this test also with individual cols, things change # lots based on how you go with this s = select([a, b, c], use_labels=True).\ select_from(j2).\ where(b.c.id == 2).\ where(c.c.id == 3).order_by(a.c.id, b.c.id, c.c.id) self._test(s, self._a_bc) def test_a_bkeyassoc(self): j1 = b_key.join(a_to_b_key) j2 = a.join(j1) s = select([a, b_key.c.bid], use_labels=True).\ select_from(j2) self._test(s, self._a_bkeyassoc) def test_a_bkeyassoc_aliased(self): bkey_alias = b_key.alias() a_to_b_key_alias = a_to_b_key.alias() j1 = bkey_alias.join(a_to_b_key_alias) j2 = a.join(j1) s = select([a, bkey_alias.c.bid], use_labels=True).\ select_from(j2) self._test(s, self._a_bkeyassoc_aliased) def test_a__b_dc(self): j1 = c.join(d) j2 = b.join(j1) j3 = a.join(j2) s = select([a, b, c, d], use_labels=True).\ select_from(j3).\ where(b.c.id == 2).\ where(c.c.id == 3).\ where(d.c.id == 4).\ order_by(a.c.id, b.c.id, c.c.id, d.c.id) self._test( s, self._a__b_dc ) def test_a_bc_comma_a1_selbc(self): # test here we're emulating is # test.orm.inheritance.test_polymorphic_rel:PolymorphicJoinsTest.test_multi_join j1 = b.join(c) j2 = b.join(c).select(use_labels=True).alias() j3 = a.join(j1) a_a = a.alias() j4 = a_a.join(j2) s = select([a, a_a, b, c, j2], use_labels=True).\ select_from(j3).select_from(j4).order_by(j2.c.b_id) self._test( s, self._a_bc_comma_a1_selbc ) class JoinRewriteTest(_JoinRewriteTestBase, fixtures.TestBase): """test rendering of each join with right-nested rewritten as aliased SELECT statements..""" @util.classproperty def __dialect__(cls): dialect = default.DefaultDialect() dialect.supports_right_nested_joins = False return dialect _a__b_dc = ( "SELECT a.id AS a_id, anon_1.b_id AS b_id, " "anon_1.b_a_id AS b_a_id, anon_1.c_id AS c_id, " "anon_1.c_b_id AS c_b_id, anon_1.d_id AS d_id, " "anon_1.d_c_id AS d_c_id " "FROM a JOIN (SELECT b.id AS b_id, b.a_id AS b_a_id, " "anon_2.c_id AS c_id, anon_2.c_b_id AS c_b_id, " "anon_2.d_id AS d_id, anon_2.d_c_id AS d_c_id " "FROM b JOIN (SELECT c.id AS c_id, c.b_id AS c_b_id, " "d.id AS d_id, d.c_id AS d_c_id " "FROM c JOIN d ON c.id = d.c_id) AS anon_2 " "ON b.id = anon_2.c_b_id) AS anon_1 ON a.id = anon_1.b_a_id " "WHERE anon_1.b_id = :id_1 AND anon_1.c_id = :id_2 AND " "anon_1.d_id = :id_3 " "ORDER BY a.id, anon_1.b_id, anon_1.c_id, anon_1.d_id" ) _a_bc = ( "SELECT a.id AS a_id, anon_1.b_id AS b_id, " "anon_1.b_a_id AS b_a_id, anon_1.c_id AS c_id, " "anon_1.c_b_id AS c_b_id FROM a JOIN " "(SELECT b.id AS b_id, b.a_id AS b_a_id, " "c.id AS c_id, c.b_id AS c_b_id " "FROM b JOIN c ON b.id = c.b_id) AS anon_1 " "ON a.id = anon_1.b_a_id " "WHERE anon_1.b_id = :id_1 AND anon_1.c_id = :id_2 " "ORDER BY a.id, anon_1.b_id, anon_1.c_id" ) _a_bc_comma_a1_selbc = ( "SELECT a.id AS a_id, a_1.id AS a_1_id, anon_1.b_id AS b_id, " "anon_1.b_a_id AS b_a_id, anon_1.c_id AS c_id, " "anon_1.c_b_id AS c_b_id, anon_2.b_id AS anon_2_b_id, " "anon_2.b_a_id AS anon_2_b_a_id, anon_2.c_id AS anon_2_c_id, " "anon_2.c_b_id AS anon_2_c_b_id FROM a " "JOIN (SELECT b.id AS b_id, b.a_id AS b_a_id, c.id AS c_id, " "c.b_id AS c_b_id FROM b JOIN c ON b.id = c.b_id) AS anon_1 " "ON a.id = anon_1.b_a_id, " "a AS a_1 JOIN " "(SELECT b.id AS b_id, b.a_id AS b_a_id, " "c.id AS c_id, c.b_id AS c_b_id " "FROM b JOIN c ON b.id = c.b_id) AS anon_2 " "ON a_1.id = anon_2.b_a_id ORDER BY anon_2.b_id" ) _a_bkeyassoc = ( "SELECT a.id AS a_id, anon_1.b_key_id AS b_key_id " "FROM a JOIN " "(SELECT b_key.id AS b_key_id, a_to_b_key.aid AS a_to_b_key_aid, " "a_to_b_key.bid AS a_to_b_key_bid FROM b_key " "JOIN a_to_b_key ON b_key.id = a_to_b_key.bid) AS anon_1 " "ON a.id = anon_1.a_to_b_key_aid" ) _a_bkeyassoc_aliased = ( "SELECT a.id AS a_id, anon_1.b_key_1_id AS b_key_1_id " "FROM a JOIN (SELECT b_key_1.id AS b_key_1_id, " "a_to_b_key_1.aid AS a_to_b_key_1_aid, " "a_to_b_key_1.bid AS a_to_b_key_1_bid FROM b_key AS b_key_1 " "JOIN a_to_b_key AS a_to_b_key_1 ON b_key_1.id = a_to_b_key_1.bid) AS " "anon_1 ON a.id = anon_1.a_to_b_key_1_aid" ) class JoinPlainTest(_JoinRewriteTestBase, fixtures.TestBase): """test rendering of each join with normal nesting.""" @util.classproperty def __dialect__(cls): dialect = default.DefaultDialect() return dialect _a__b_dc = ( "SELECT a.id AS a_id, b.id AS b_id, " "b.a_id AS b_a_id, c.id AS c_id, " "c.b_id AS c_b_id, d.id AS d_id, " "d.c_id AS d_c_id " "FROM a JOIN (b JOIN (c JOIN d ON c.id = d.c_id) " "ON b.id = c.b_id) ON a.id = b.a_id " "WHERE b.id = :id_1 AND c.id = :id_2 AND " "d.id = :id_3 " "ORDER BY a.id, b.id, c.id, d.id" ) _a_bc = ( "SELECT a.id AS a_id, b.id AS b_id, " "b.a_id AS b_a_id, c.id AS c_id, " "c.b_id AS c_b_id FROM a JOIN " "(b JOIN c ON b.id = c.b_id) " "ON a.id = b.a_id " "WHERE b.id = :id_1 AND c.id = :id_2 " "ORDER BY a.id, b.id, c.id" ) _a_bc_comma_a1_selbc = ( "SELECT a.id AS a_id, a_1.id AS a_1_id, b.id AS b_id, " "b.a_id AS b_a_id, c.id AS c_id, " "c.b_id AS c_b_id, anon_1.b_id AS anon_1_b_id, " "anon_1.b_a_id AS anon_1_b_a_id, anon_1.c_id AS anon_1_c_id, " "anon_1.c_b_id AS anon_1_c_b_id FROM a " "JOIN (b JOIN c ON b.id = c.b_id) " "ON a.id = b.a_id, " "a AS a_1 JOIN " "(SELECT b.id AS b_id, b.a_id AS b_a_id, " "c.id AS c_id, c.b_id AS c_b_id " "FROM b JOIN c ON b.id = c.b_id) AS anon_1 " "ON a_1.id = anon_1.b_a_id ORDER BY anon_1.b_id" ) _a_bkeyassoc = ( "SELECT a.id AS a_id, b_key.id AS b_key_id " "FROM a JOIN " "(b_key JOIN a_to_b_key ON b_key.id = a_to_b_key.bid) " "ON a.id = a_to_b_key.aid" ) _a_bkeyassoc_aliased = ( "SELECT a.id AS a_id, b_key_1.id AS b_key_1_id FROM a " "JOIN (b_key AS b_key_1 JOIN a_to_b_key AS a_to_b_key_1 " "ON b_key_1.id = a_to_b_key_1.bid) ON a.id = a_to_b_key_1.aid" ) class JoinNoUseLabelsTest(_JoinRewriteTestBase, fixtures.TestBase): @util.classproperty def __dialect__(cls): dialect = default.DefaultDialect() dialect.supports_right_nested_joins = False return dialect def _test(self, s, assert_): s.use_labels = False self.assert_compile( s, assert_ ) _a__b_dc = ( "SELECT a.id, b.id, " "b.a_id, c.id, " "c.b_id, d.id, " "d.c_id " "FROM a JOIN (b JOIN (c JOIN d ON c.id = d.c_id) " "ON b.id = c.b_id) ON a.id = b.a_id " "WHERE b.id = :id_1 AND c.id = :id_2 AND " "d.id = :id_3 " "ORDER BY a.id, b.id, c.id, d.id" ) _a_bc = ( "SELECT a.id, b.id, " "b.a_id, c.id, " "c.b_id FROM a JOIN " "(b JOIN c ON b.id = c.b_id) " "ON a.id = b.a_id " "WHERE b.id = :id_1 AND c.id = :id_2 " "ORDER BY a.id, b.id, c.id" ) _a_bc_comma_a1_selbc = ( "SELECT a.id, a_1.id, b.id, " "b.a_id, c.id, " "c.b_id, anon_1.b_id, " "anon_1.b_a_id, anon_1.c_id, " "anon_1.c_b_id FROM a " "JOIN (b JOIN c ON b.id = c.b_id) " "ON a.id = b.a_id, " "a AS a_1 JOIN " "(SELECT b.id AS b_id, b.a_id AS b_a_id, " "c.id AS c_id, c.b_id AS c_b_id " "FROM b JOIN c ON b.id = c.b_id) AS anon_1 " "ON a_1.id = anon_1.b_a_id ORDER BY anon_1.b_id" ) _a_bkeyassoc = ( "SELECT a.id, b_key.id FROM a JOIN (b_key JOIN a_to_b_key " "ON b_key.id = a_to_b_key.bid) ON a.id = a_to_b_key.aid" ) _a_bkeyassoc_aliased = ( "SELECT a.id, b_key_1.id FROM a JOIN (b_key AS b_key_1 " "JOIN a_to_b_key AS a_to_b_key_1 ON b_key_1.id = a_to_b_key_1.bid) " "ON a.id = a_to_b_key_1.aid" ) class JoinExecTest(_JoinRewriteTestBase, fixtures.TestBase): """invoke the SQL on the current backend to ensure compatibility""" _a_bc = _a_bc_comma_a1_selbc = _a__b_dc = _a_bkeyassoc = _a_bkeyassoc_aliased = None @classmethod def setup_class(cls): m.create_all(testing.db) @classmethod def teardown_class(cls): m.drop_all(testing.db) def _test(self, selectable, assert_): result = testing.db.execute(selectable) for col in selectable.inner_columns: assert col in result._metadata._keymap class DialectFlagTest(fixtures.TestBase, AssertsCompiledSQL): def test_dialect_flag(self): d1 = default.DefaultDialect(supports_right_nested_joins=True) d2 = default.DefaultDialect(supports_right_nested_joins=False) j1 = b.join(c) j2 = a.join(j1) s = select([a, b, c], use_labels=True).\ select_from(j2) self.assert_compile( s, "SELECT a.id AS a_id, b.id AS b_id, b.a_id AS b_a_id, c.id AS c_id, " "c.b_id AS c_b_id FROM a JOIN (b JOIN c ON b.id = c.b_id) " "ON a.id = b.a_id", dialect=d1 ) self.assert_compile( s, "SELECT a.id AS a_id, anon_1.b_id AS b_id, " "anon_1.b_a_id AS b_a_id, " "anon_1.c_id AS c_id, anon_1.c_b_id AS c_b_id " "FROM a JOIN (SELECT b.id AS b_id, b.a_id AS b_a_id, c.id AS c_id, " "c.b_id AS c_b_id FROM b JOIN c ON b.id = c.b_id) AS anon_1 " "ON a.id = anon_1.b_a_id", dialect=d2 )