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82d194c9a65b09fef8d52318cbe38e2c84dfd2ca
sqlalchemy/test/sql/test_generative.py
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Mike Bayer 0a556d3220 - Fixed bug in Query whereby the usage of aliased() constructs 
would fail if the underlying table (but not the actual alias)
were referenced inside the subquery generated by
q.from_self() or q.select_from().
2010-03-23 14:54:26 -04:00

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from sqlalchemy import *
from sqlalchemy.sql import table, column, ClauseElement
from sqlalchemy.sql.expression import _clone, _from_objects
from sqlalchemy.test import *
from sqlalchemy.sql.visitors import *
from sqlalchemy import util
from sqlalchemy.sql import util as sql_util
from sqlalchemy.test.testing import eq_
class TraversalTest(TestBase, AssertsExecutionResults):
"""test ClauseVisitor's traversal, particularly its ability to copy and modify
a ClauseElement in place."""
@classmethod
def setup_class(cls):
global A, B
# establish two ficticious ClauseElements.
# define deep equality semantics as well as deep identity semantics.
class A(ClauseElement):
__visit_name__ = 'a'
def __init__(self, expr):
self.expr = expr
def is_other(self, other):
return other is self
__hash__ = ClauseElement.__hash__
def __eq__(self, other):
return other.expr == self.expr
def __ne__(self, other):
return other.expr != self.expr
def __str__(self):
return "A(%s)" % repr(self.expr)
class B(ClauseElement):
__visit_name__ = 'b'
def __init__(self, *items):
self.items = items
def is_other(self, other):
if other is not self:
return False
for i1, i2 in zip(self.items, other.items):
if i1 is not i2:
return False
return True
__hash__ = ClauseElement.__hash__
def __eq__(self, other):
for i1, i2 in zip(self.items, other.items):
if i1 != i2:
return False
return True
def __ne__(self, other):
for i1, i2 in zip(self.items, other.items):
if i1 != i2:
return True
return False
def _copy_internals(self, clone=_clone):
self.items = [clone(i) for i in self.items]
def get_children(self, **kwargs):
return self.items
def __str__(self):
return "B(%s)" % repr([str(i) for i in self.items])
def test_test_classes(self):
a1 = A("expr1")
struct = B(a1, A("expr2"), B(A("expr1b"), A("expr2b")), A("expr3"))
struct2 = B(a1, A("expr2"), B(A("expr1b"), A("expr2b")), A("expr3"))
struct3 = B(a1, A("expr2"), B(A("expr1b"), A("expr2bmodified")), A("expr3"))
assert a1.is_other(a1)
assert struct.is_other(struct)
assert struct == struct2
assert struct != struct3
assert not struct.is_other(struct2)
assert not struct.is_other(struct3)
def test_clone(self):
struct = B(A("expr1"), A("expr2"), B(A("expr1b"), A("expr2b")), A("expr3"))
class Vis(CloningVisitor):
def visit_a(self, a):
pass
def visit_b(self, b):
pass
vis = Vis()
s2 = vis.traverse(struct)
assert struct == s2
assert not struct.is_other(s2)
def test_no_clone(self):
struct = B(A("expr1"), A("expr2"), B(A("expr1b"), A("expr2b")), A("expr3"))
class Vis(ClauseVisitor):
def visit_a(self, a):
pass
def visit_b(self, b):
pass
vis = Vis()
s2 = vis.traverse(struct)
assert struct == s2
assert struct.is_other(s2)
def test_change_in_place(self):
struct = B(A("expr1"), A("expr2"), B(A("expr1b"), A("expr2b")), A("expr3"))
struct2 = B(A("expr1"), A("expr2modified"), B(A("expr1b"), A("expr2b")), A("expr3"))
struct3 = B(A("expr1"), A("expr2"), B(A("expr1b"), A("expr2bmodified")), A("expr3"))
class Vis(CloningVisitor):
def visit_a(self, a):
if a.expr == "expr2":
a.expr = "expr2modified"
def visit_b(self, b):
pass
vis = Vis()
s2 = vis.traverse(struct)
assert struct != s2
assert not struct.is_other(s2)
assert struct2 == s2
class Vis2(CloningVisitor):
def visit_a(self, a):
if a.expr == "expr2b":
a.expr = "expr2bmodified"
def visit_b(self, b):
pass
vis2 = Vis2()
s3 = vis2.traverse(struct)
assert struct != s3
assert struct3 == s3
def test_visit_name(self):
# override fns in testlib/schema.py
from sqlalchemy import Column
class CustomObj(Column):
pass
assert CustomObj.__visit_name__ == Column.__visit_name__ == 'column'
foo, bar = CustomObj('foo', String), CustomObj('bar', String)
bin = foo == bar
s = set(ClauseVisitor().iterate(bin))
assert set(ClauseVisitor().iterate(bin)) == set([foo, bar, bin])
class ClauseTest(TestBase, AssertsCompiledSQL):
"""test copy-in-place behavior of various ClauseElements."""
@classmethod
def setup_class(cls):
global t1, t2
t1 = table("table1",
column("col1"),
column("col2"),
column("col3"),
)
t2 = table("table2",
column("col1"),
column("col2"),
column("col3"),
)
def test_binary(self):
clause = t1.c.col2 == t2.c.col2
eq_(str(clause), str(CloningVisitor().traverse(clause)))
def test_binary_anon_label_quirk(self):
t = table('t1', column('col1'))
f = t.c.col1 * 5
self.assert_compile(select([f]), "SELECT t1.col1 * :col1_1 AS anon_1 FROM t1")
f.anon_label
a = t.alias()
f = sql_util.ClauseAdapter(a).traverse(f)
self.assert_compile(select([f]), "SELECT t1_1.col1 * :col1_1 AS anon_1 FROM t1 AS t1_1")
def test_join(self):
clause = t1.join(t2, t1.c.col2==t2.c.col2)
c1 = str(clause)
assert str(clause) == str(CloningVisitor().traverse(clause))
class Vis(CloningVisitor):
def visit_binary(self, binary):
binary.right = t2.c.col3
clause2 = Vis().traverse(clause)
assert c1 == str(clause)
assert str(clause2) == str(t1.join(t2, t1.c.col2==t2.c.col3))
def test_aliased_column_adapt(self):
clause = t1.select()
aliased = t1.select().alias()
aliased2 = t1.alias()
adapter = sql_util.ColumnAdapter(aliased)
f = select([
adapter.columns[c]
for c in aliased2.c
]).select_from(aliased)
s = select([aliased2]).select_from(aliased)
eq_(str(s), str(f))
f = select([
adapter.columns[func.count(aliased2.c.col1)]
]).select_from(aliased)
eq_(
str(select([func.count(aliased2.c.col1)]).select_from(aliased)),
str(f)
)
def test_text(self):
clause = text("select * from table where foo=:bar", bindparams=[bindparam('bar')])
c1 = str(clause)
class Vis(CloningVisitor):
def visit_textclause(self, text):
text.text = text.text + " SOME MODIFIER=:lala"
text.bindparams['lala'] = bindparam('lala')
clause2 = Vis().traverse(clause)
assert c1 == str(clause)
assert str(clause2) == c1 + " SOME MODIFIER=:lala"
assert clause.bindparams.keys() == ['bar']
assert set(clause2.bindparams.keys()) == set(['bar', 'lala'])
def test_select(self):
s2 = select([t1])
s2_assert = str(s2)
s3_assert = str(select([t1], t1.c.col2==7))
class Vis(CloningVisitor):
def visit_select(self, select):
select.append_whereclause(t1.c.col2==7)
s3 = Vis().traverse(s2)
assert str(s3) == s3_assert
assert str(s2) == s2_assert
print str(s2)
print str(s3)
class Vis(ClauseVisitor):
def visit_select(self, select):
select.append_whereclause(t1.c.col2==7)
Vis().traverse(s2)
assert str(s2) == s3_assert
print "------------------"
s4_assert = str(select([t1], and_(t1.c.col2==7, t1.c.col3==9)))
class Vis(CloningVisitor):
def visit_select(self, select):
select.append_whereclause(t1.c.col3==9)
s4 = Vis().traverse(s3)
print str(s3)
print str(s4)
assert str(s4) == s4_assert
assert str(s3) == s3_assert
print "------------------"
s5_assert = str(select([t1], and_(t1.c.col2==7, t1.c.col1==9)))
class Vis(CloningVisitor):
def visit_binary(self, binary):
if binary.left is t1.c.col3:
binary.left = t1.c.col1
binary.right = bindparam("col1", unique=True)
s5 = Vis().traverse(s4)
print str(s4)
print str(s5)
assert str(s5) == s5_assert
assert str(s4) == s4_assert
def test_union(self):
u = union(t1.select(), t2.select())
u2 = CloningVisitor().traverse(u)
assert str(u) == str(u2)
assert [str(c) for c in u2.c] == [str(c) for c in u.c]
u = union(t1.select(), t2.select())
cols = [str(c) for c in u.c]
u2 = CloningVisitor().traverse(u)
assert str(u) == str(u2)
assert [str(c) for c in u2.c] == cols
s1 = select([t1], t1.c.col1 == bindparam('id_param'))
s2 = select([t2])
u = union(s1, s2)
u2 = u.params(id_param=7)
u3 = u.params(id_param=10)
assert str(u) == str(u2) == str(u3)
assert u2.compile().params == {'id_param':7}
assert u3.compile().params == {'id_param':10}
def test_in(self):
expr = t1.c.col1.in_(['foo', 'bar'])
expr2 = CloningVisitor().traverse(expr)
assert str(expr) == str(expr2)
def test_adapt_union(self):
u = union(t1.select().where(t1.c.col1==4), t1.select().where(t1.c.col1==5)).alias()
assert sql_util.ClauseAdapter(u).traverse(t1) is u
def test_binds(self):
"""test that unique bindparams change their name upon clone() to prevent conflicts"""
s = select([t1], t1.c.col1==bindparam(None, unique=True)).alias()
s2 = CloningVisitor().traverse(s).alias()
s3 = select([s], s.c.col2==s2.c.col2)
self.assert_compile(s3, "SELECT anon_1.col1, anon_1.col2, anon_1.col3 FROM (SELECT table1.col1 AS col1, table1.col2 AS col2, "\
"table1.col3 AS col3 FROM table1 WHERE table1.col1 = :param_1) AS anon_1, "\
"(SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1 WHERE table1.col1 = :param_2) AS anon_2 "\
"WHERE anon_1.col2 = anon_2.col2")
s = select([t1], t1.c.col1==4).alias()
s2 = CloningVisitor().traverse(s).alias()
s3 = select([s], s.c.col2==s2.c.col2)
self.assert_compile(s3, "SELECT anon_1.col1, anon_1.col2, anon_1.col3 FROM (SELECT table1.col1 AS col1, table1.col2 AS col2, "\
"table1.col3 AS col3 FROM table1 WHERE table1.col1 = :col1_1) AS anon_1, "\
"(SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1 WHERE table1.col1 = :col1_2) AS anon_2 "\
"WHERE anon_1.col2 = anon_2.col2")
def test_extract(self):
s = select([extract('foo', t1.c.col1).label('col1')])
self.assert_compile(s, "SELECT EXTRACT(foo FROM table1.col1) AS col1 FROM table1")
s2 = CloningVisitor().traverse(s).alias()
s3 = select([s2.c.col1])
self.assert_compile(s, "SELECT EXTRACT(foo FROM table1.col1) AS col1 FROM table1")
self.assert_compile(s3, "SELECT anon_1.col1 FROM (SELECT EXTRACT(foo FROM table1.col1) AS col1 FROM table1) AS anon_1")
@testing.emits_warning('.*replaced by another column with the same key')
def test_alias(self):
subq = t2.select().alias('subq')
s = select([t1.c.col1, subq.c.col1], from_obj=[t1, subq, t1.join(subq, t1.c.col1==subq.c.col2)])
orig = str(s)
s2 = CloningVisitor().traverse(s)
assert orig == str(s) == str(s2)
s4 = CloningVisitor().traverse(s2)
assert orig == str(s) == str(s2) == str(s4)
s3 = sql_util.ClauseAdapter(table('foo')).traverse(s)
assert orig == str(s) == str(s3)
s4 = sql_util.ClauseAdapter(table('foo')).traverse(s3)
assert orig == str(s) == str(s3) == str(s4)
subq = subq.alias('subq')
s = select([t1.c.col1, subq.c.col1], from_obj=[t1, subq, t1.join(subq, t1.c.col1==subq.c.col2)])
s5 = CloningVisitor().traverse(s)
assert orig == str(s) == str(s5)
def test_correlated_select(self):
s = select(['*'], t1.c.col1==t2.c.col1, from_obj=[t1, t2]).correlate(t2)
class Vis(CloningVisitor):
def visit_select(self, select):
select.append_whereclause(t1.c.col2==7)
self.assert_compile(Vis().traverse(s), "SELECT * FROM table1 WHERE table1.col1 = table2.col1 AND table1.col2 = :col2_1")
def test_this_thing(self):
s = select([t1]).where(t1.c.col1=='foo').alias()
s2 = select([s.c.col1])
self.assert_compile(s2, "SELECT anon_1.col1 FROM (SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1 WHERE table1.col1 = :col1_1) AS anon_1")
t1a = t1.alias()
s2 = sql_util.ClauseAdapter(t1a).traverse(s2)
self.assert_compile(s2, "SELECT anon_1.col1 FROM (SELECT table1_1.col1 AS col1, table1_1.col2 AS col2, table1_1.col3 AS col3 FROM table1 AS table1_1 WHERE table1_1.col1 = :col1_1) AS anon_1")
def test_select_fromtwice(self):
t1a = t1.alias()
s = select([1], t1.c.col1==t1a.c.col1, from_obj=t1a).correlate(t1)
self.assert_compile(s, "SELECT 1 FROM table1 AS table1_1 WHERE table1.col1 = table1_1.col1")
s = CloningVisitor().traverse(s)
self.assert_compile(s, "SELECT 1 FROM table1 AS table1_1 WHERE table1.col1 = table1_1.col1")
s = select([t1]).where(t1.c.col1=='foo').alias()
s2 = select([1], t1.c.col1==s.c.col1, from_obj=s).correlate(t1)
self.assert_compile(s2, "SELECT 1 FROM (SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1 WHERE table1.col1 = :col1_1) AS anon_1 WHERE table1.col1 = anon_1.col1")
s2 = ReplacingCloningVisitor().traverse(s2)
self.assert_compile(s2, "SELECT 1 FROM (SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1 WHERE table1.col1 = :col1_1) AS anon_1 WHERE table1.col1 = anon_1.col1")
class ClauseAdapterTest(TestBase, AssertsCompiledSQL):
@classmethod
def setup_class(cls):
global t1, t2
t1 = table("table1",
column("col1"),
column("col2"),
column("col3"),
)
t2 = table("table2",
column("col1"),
column("col2"),
column("col3"),
)
def test_correlation_on_clone(self):
t1alias = t1.alias('t1alias')
t2alias = t2.alias('t2alias')
vis = sql_util.ClauseAdapter(t1alias)
s = select(['*'], from_obj=[t1alias, t2alias]).as_scalar()
assert t2alias in s._froms
assert t1alias in s._froms
self.assert_compile(select(['*'], t2alias.c.col1==s), "SELECT * FROM table2 AS t2alias WHERE t2alias.col1 = (SELECT * FROM table1 AS t1alias)")
s = vis.traverse(s)
assert t2alias not in s._froms # not present because it's been cloned
assert t1alias in s._froms # present because the adapter placed it there
# correlate list on "s" needs to take into account the full _cloned_set for each element in _froms when correlating
self.assert_compile(select(['*'], t2alias.c.col1==s), "SELECT * FROM table2 AS t2alias WHERE t2alias.col1 = (SELECT * FROM table1 AS t1alias)")
s = select(['*'], from_obj=[t1alias, t2alias]).correlate(t2alias).as_scalar()
self.assert_compile(select(['*'], t2alias.c.col1==s), "SELECT * FROM table2 AS t2alias WHERE t2alias.col1 = (SELECT * FROM table1 AS t1alias)")
s = vis.traverse(s)
self.assert_compile(select(['*'], t2alias.c.col1==s), "SELECT * FROM table2 AS t2alias WHERE t2alias.col1 = (SELECT * FROM table1 AS t1alias)")
s = CloningVisitor().traverse(s)
self.assert_compile(select(['*'], t2alias.c.col1==s), "SELECT * FROM table2 AS t2alias WHERE t2alias.col1 = (SELECT * FROM table1 AS t1alias)")
s = select(['*']).where(t1.c.col1==t2.c.col1).as_scalar()
self.assert_compile(select([t1.c.col1, s]), "SELECT table1.col1, (SELECT * FROM table2 WHERE table1.col1 = table2.col1) AS anon_1 FROM table1")
vis = sql_util.ClauseAdapter(t1alias)
s = vis.traverse(s)
self.assert_compile(select([t1alias.c.col1, s]), "SELECT t1alias.col1, (SELECT * FROM table2 WHERE t1alias.col1 = table2.col1) AS anon_1 FROM table1 AS t1alias")
s = CloningVisitor().traverse(s)
self.assert_compile(select([t1alias.c.col1, s]), "SELECT t1alias.col1, (SELECT * FROM table2 WHERE t1alias.col1 = table2.col1) AS anon_1 FROM table1 AS t1alias")
s = select(['*']).where(t1.c.col1==t2.c.col1).correlate(t1).as_scalar()
self.assert_compile(select([t1.c.col1, s]), "SELECT table1.col1, (SELECT * FROM table2 WHERE table1.col1 = table2.col1) AS anon_1 FROM table1")
vis = sql_util.ClauseAdapter(t1alias)
s = vis.traverse(s)
self.assert_compile(select([t1alias.c.col1, s]), "SELECT t1alias.col1, (SELECT * FROM table2 WHERE t1alias.col1 = table2.col1) AS anon_1 FROM table1 AS t1alias")
s = CloningVisitor().traverse(s)
self.assert_compile(select([t1alias.c.col1, s]), "SELECT t1alias.col1, (SELECT * FROM table2 WHERE t1alias.col1 = table2.col1) AS anon_1 FROM table1 AS t1alias")
@testing.fails_on_everything_except()
def test_joins_dont_adapt(self):
# adapting to a join, i.e. ClauseAdapter(t1.join(t2)), doesn't make much sense.
# ClauseAdapter doesn't make any changes if it's against a straight join.
users = table('users', column('id'))
addresses = table('addresses', column('id'), column('user_id'))
ualias = users.alias()
s = select([func.count(addresses.c.id)], users.c.id==addresses.c.user_id).correlate(users) #.as_scalar().label(None)
s= sql_util.ClauseAdapter(ualias).traverse(s)
j1 = addresses.join(ualias, addresses.c.user_id==ualias.c.id)
self.assert_compile(sql_util.ClauseAdapter(j1).traverse(s), "SELECT count(addresses.id) AS count_1 FROM addresses WHERE users_1.id = addresses.user_id")
def test_table_to_alias(self):
t1alias = t1.alias('t1alias')
vis = sql_util.ClauseAdapter(t1alias)
ff = vis.traverse(func.count(t1.c.col1).label('foo'))
assert list(_from_objects(ff)) == [t1alias]
self.assert_compile(vis.traverse(select(['*'], from_obj=[t1])), "SELECT * FROM table1 AS t1alias")
self.assert_compile(select(['*'], t1.c.col1==t2.c.col2), "SELECT * FROM table1, table2 WHERE table1.col1 = table2.col2")
self.assert_compile(vis.traverse(select(['*'], t1.c.col1==t2.c.col2)), "SELECT * FROM table1 AS t1alias, table2 WHERE t1alias.col1 = table2.col2")
self.assert_compile(vis.traverse(select(['*'], t1.c.col1==t2.c.col2, from_obj=[t1, t2])), "SELECT * FROM table1 AS t1alias, table2 WHERE t1alias.col1 = table2.col2")
self.assert_compile(vis.traverse(select(['*'], t1.c.col1==t2.c.col2, from_obj=[t1, t2]).correlate(t1)), "SELECT * FROM table2 WHERE t1alias.col1 = table2.col2")
self.assert_compile(vis.traverse(select(['*'], t1.c.col1==t2.c.col2, from_obj=[t1, t2]).correlate(t2)), "SELECT * FROM table1 AS t1alias WHERE t1alias.col1 = table2.col2")
self.assert_compile(vis.traverse(case([(t1.c.col1==5, t1.c.col2)], else_=t1.c.col1)),
"CASE WHEN (t1alias.col1 = :col1_1) THEN t1alias.col2 ELSE t1alias.col1 END"
)
self.assert_compile(vis.traverse(case([(5, t1.c.col2)], value=t1.c.col1, else_=t1.c.col1)),
"CASE t1alias.col1 WHEN :param_1 THEN t1alias.col2 ELSE t1alias.col1 END"
)
s = select(['*'], from_obj=[t1]).alias('foo')
self.assert_compile(s.select(), "SELECT foo.* FROM (SELECT * FROM table1) AS foo")
self.assert_compile(vis.traverse(s.select()), "SELECT foo.* FROM (SELECT * FROM table1 AS t1alias) AS foo")
self.assert_compile(s.select(), "SELECT foo.* FROM (SELECT * FROM table1) AS foo")
ff = vis.traverse(func.count(t1.c.col1).label('foo'))
self.assert_compile(select([ff]), "SELECT count(t1alias.col1) AS foo FROM table1 AS t1alias")
assert list(_from_objects(ff)) == [t1alias]
# TODO:
# self.assert_compile(vis.traverse(select([func.count(t1.c.col1).label('foo')]), clone=True), "SELECT count(t1alias.col1) AS foo FROM table1 AS t1alias")
t2alias = t2.alias('t2alias')
vis.chain(sql_util.ClauseAdapter(t2alias))
self.assert_compile(vis.traverse(select(['*'], t1.c.col1==t2.c.col2)), "SELECT * FROM table1 AS t1alias, table2 AS t2alias WHERE t1alias.col1 = t2alias.col2")
self.assert_compile(vis.traverse(select(['*'], t1.c.col1==t2.c.col2, from_obj=[t1, t2])), "SELECT * FROM table1 AS t1alias, table2 AS t2alias WHERE t1alias.col1 = t2alias.col2")
self.assert_compile(vis.traverse(select(['*'], t1.c.col1==t2.c.col2, from_obj=[t1, t2]).correlate(t1)), "SELECT * FROM table2 AS t2alias WHERE t1alias.col1 = t2alias.col2")
self.assert_compile(vis.traverse(select(['*'], t1.c.col1==t2.c.col2, from_obj=[t1, t2]).correlate(t2)), "SELECT * FROM table1 AS t1alias WHERE t1alias.col1 = t2alias.col2")
def test_include_exclude(self):
m = MetaData()
a=Table( 'a',m,
Column( 'id', Integer, primary_key=True),
Column( 'xxx_id', Integer, ForeignKey( 'a.id', name='adf',use_alter=True ) )
)
e = (a.c.id == a.c.xxx_id)
assert str(e) == "a.id = a.xxx_id"
b = a.alias()
e = sql_util.ClauseAdapter( b, include= set([ a.c.id ]),
equivalents= { a.c.id: set([ a.c.id]) }
).traverse( e)
assert str(e) == "a_1.id = a.xxx_id"
def test_recursive_equivalents(self):
m = MetaData()
a = Table('a', m, Column('x', Integer), Column('y', Integer))
b = Table('b', m, Column('x', Integer), Column('y', Integer))
c = Table('c', m, Column('x', Integer), Column('y', Integer))
# force a recursion overflow, by linking a.c.x<->c.c.x, and
# asking for a nonexistent col. corresponding_column should prevent
# endless depth.
adapt = sql_util.ClauseAdapter( b, equivalents= {a.c.x: set([ c.c.x]), c.c.x:set([a.c.x])})
assert adapt._corresponding_column(a.c.x, False) is None
def test_multilevel_equivalents(self):
m = MetaData()
a = Table('a', m, Column('x', Integer), Column('y', Integer))
b = Table('b', m, Column('x', Integer), Column('y', Integer))
c = Table('c', m, Column('x', Integer), Column('y', Integer))
alias = select([a]).select_from(a.join(b, a.c.x==b.c.x)).alias()
# two levels of indirection from c.x->b.x->a.x, requires recursive
# corresponding_column call
adapt = sql_util.ClauseAdapter(alias, equivalents= {b.c.x: set([ a.c.x]), c.c.x:set([b.c.x])})
assert adapt._corresponding_column(a.c.x, False) is alias.c.x
assert adapt._corresponding_column(c.c.x, False) is alias.c.x
def test_join_to_alias(self):
metadata = MetaData()
a = Table('a', metadata,
Column('id', Integer, primary_key=True))
b = Table('b', metadata,
Column('id', Integer, primary_key=True),
Column('aid', Integer, ForeignKey('a.id')),
)
c = Table('c', metadata,
Column('id', Integer, primary_key=True),
Column('bid', Integer, ForeignKey('b.id')),
)
d = Table('d', metadata,
Column('id', Integer, primary_key=True),
Column('aid', Integer, ForeignKey('a.id')),
)
j1 = a.outerjoin(b)
j2 = select([j1], use_labels=True)
j3 = c.join(j2, j2.c.b_id==c.c.bid)
j4 = j3.outerjoin(d)
self.assert_compile(j4, "c JOIN (SELECT a.id AS a_id, b.id AS b_id, b.aid AS b_aid FROM a LEFT OUTER JOIN b ON a.id = b.aid) "
"ON b_id = c.bid"
" LEFT OUTER JOIN d ON a_id = d.aid")
j5 = j3.alias('foo')
j6 = sql_util.ClauseAdapter(j5).copy_and_process([j4])[0]
# this statement takes c join(a join b), wraps it inside an aliased "select * from c join(a join b) AS foo".
# the outermost right side "left outer join d" stays the same, except "d" joins against foo.a_id instead
# of plain "a_id"
self.assert_compile(j6, "(SELECT c.id AS c_id, c.bid AS c_bid, a_id AS a_id, b_id AS b_id, b_aid AS b_aid FROM "
"c JOIN (SELECT a.id AS a_id, b.id AS b_id, b.aid AS b_aid FROM a LEFT OUTER JOIN b ON a.id = b.aid) "
"ON b_id = c.bid) AS foo"
" LEFT OUTER JOIN d ON foo.a_id = d.aid")
def test_derived_from(self):
assert select([t1]).is_derived_from(t1)
assert not select([t2]).is_derived_from(t1)
assert not t1.is_derived_from(select([t1]))
assert t1.alias().is_derived_from(t1)
s1 = select([t1, t2]).alias('foo')
s2 = select([s1]).limit(5).offset(10).alias()
assert s2.is_derived_from(s1)
s2 = s2._clone()
assert s2.is_derived_from(s1)
def test_aliasedselect_to_aliasedselect(self):
# original issue from ticket #904
s1 = select([t1]).alias('foo')
s2 = select([s1]).limit(5).offset(10).alias()
self.assert_compile(sql_util.ClauseAdapter(s2).traverse(s1),
"SELECT foo.col1, foo.col2, foo.col3 FROM (SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1) AS foo LIMIT 5 OFFSET 10")
j = s1.outerjoin(t2, s1.c.col1==t2.c.col1)
self.assert_compile(sql_util.ClauseAdapter(s2).traverse(j).select(),
"SELECT anon_1.col1, anon_1.col2, anon_1.col3, table2.col1, table2.col2, table2.col3 FROM "\
"(SELECT foo.col1 AS col1, foo.col2 AS col2, foo.col3 AS col3 FROM "\
"(SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1) AS foo LIMIT 5 OFFSET 10) AS anon_1 "\
"LEFT OUTER JOIN table2 ON anon_1.col1 = table2.col1")
talias = t1.alias('bar')
j = s1.outerjoin(talias, s1.c.col1==talias.c.col1)
self.assert_compile(sql_util.ClauseAdapter(s2).traverse(j).select(),
"SELECT anon_1.col1, anon_1.col2, anon_1.col3, bar.col1, bar.col2, bar.col3 FROM "\
"(SELECT foo.col1 AS col1, foo.col2 AS col2, foo.col3 AS col3 FROM "\
"(SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1) AS foo LIMIT 5 OFFSET 10) AS anon_1 "\
"LEFT OUTER JOIN table1 AS bar ON anon_1.col1 = bar.col1")
def test_functions(self):
self.assert_compile(sql_util.ClauseAdapter(t1.alias()).traverse(func.count(t1.c.col1)), "count(table1_1.col1)")
s = select([func.count(t1.c.col1)])
self.assert_compile(sql_util.ClauseAdapter(t1.alias()).traverse(s), "SELECT count(table1_1.col1) AS count_1 FROM table1 AS table1_1")
def test_recursive(self):
metadata = MetaData()
a = Table('a', metadata,
Column('id', Integer, primary_key=True))
b = Table('b', metadata,
Column('id', Integer, primary_key=True),
Column('aid', Integer, ForeignKey('a.id')),
)
c = Table('c', metadata,
Column('id', Integer, primary_key=True),
Column('bid', Integer, ForeignKey('b.id')),
)
d = Table('d', metadata,
Column('id', Integer, primary_key=True),
Column('aid', Integer, ForeignKey('a.id')),
)
u = union(
a.join(b).select().apply_labels(),
a.join(d).select().apply_labels()
).alias()
self.assert_compile(
sql_util.ClauseAdapter(u).traverse(select([c.c.bid]).where(c.c.bid==u.c.b_aid)),
"SELECT c.bid "\
"FROM c, (SELECT a.id AS a_id, b.id AS b_id, b.aid AS b_aid "\
"FROM a JOIN b ON a.id = b.aid UNION SELECT a.id AS a_id, d.id AS d_id, d.aid AS d_aid "\
"FROM a JOIN d ON a.id = d.aid) AS anon_1 "\
"WHERE c.bid = anon_1.b_aid"
)
class SpliceJoinsTest(TestBase, AssertsCompiledSQL):
@classmethod
def setup_class(cls):
global table1, table2, table3, table4
def _table(name):
return table(name, column("col1"), column("col2"),column("col3"))
table1, table2, table3, table4 = [_table(name) for name in ("table1", "table2", "table3", "table4")]
def test_splice(self):
(t1, t2, t3, t4) = (table1, table2, table1.alias(), table2.alias())
j = t1.join(t2, t1.c.col1==t2.c.col1).join(t3, t2.c.col1==t3.c.col1).join(t4, t4.c.col1==t1.c.col1)
s = select([t1]).where(t1.c.col2<5).alias()
self.assert_compile(sql_util.splice_joins(s, j),
"(SELECT table1.col1 AS col1, table1.col2 AS col2, "\
"table1.col3 AS col3 FROM table1 WHERE table1.col2 < :col2_1) AS anon_1 "\
"JOIN table2 ON anon_1.col1 = table2.col1 JOIN table1 AS table1_1 ON table2.col1 = table1_1.col1 "\
"JOIN table2 AS table2_1 ON table2_1.col1 = anon_1.col1")
def test_stop_on(self):
(t1, t2, t3) = (table1, table2, table3)
j1= t1.join(t2, t1.c.col1==t2.c.col1)
j2 = j1.join(t3, t2.c.col1==t3.c.col1)
s = select([t1]).select_from(j1).alias()
self.assert_compile(sql_util.splice_joins(s, j2),
"(SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1 JOIN table2 "\
"ON table1.col1 = table2.col1) AS anon_1 JOIN table2 ON anon_1.col1 = table2.col1 JOIN table3 "\
"ON table2.col1 = table3.col1"
)
self.assert_compile(sql_util.splice_joins(s, j2, j1),
"(SELECT table1.col1 AS col1, table1.col2 AS col2, table1.col3 AS col3 FROM table1 "\
"JOIN table2 ON table1.col1 = table2.col1) AS anon_1 JOIN table3 ON table2.col1 = table3.col1")
def test_splice_2(self):
t2a = table2.alias()
t3a = table3.alias()
j1 = table1.join(t2a, table1.c.col1==t2a.c.col1).join(t3a, t2a.c.col2==t3a.c.col2)
t2b = table4.alias()
j2 = table1.join(t2b, table1.c.col3==t2b.c.col3)
self.assert_compile(sql_util.splice_joins(table1, j1),
"table1 JOIN table2 AS table2_1 ON table1.col1 = table2_1.col1 "\
"JOIN table3 AS table3_1 ON table2_1.col2 = table3_1.col2")
self.assert_compile(sql_util.splice_joins(table1, j2), "table1 JOIN table4 AS table4_1 ON table1.col3 = table4_1.col3")
self.assert_compile(sql_util.splice_joins(sql_util.splice_joins(table1, j1), j2),
"table1 JOIN table2 AS table2_1 ON table1.col1 = table2_1.col1 "\
"JOIN table3 AS table3_1 ON table2_1.col2 = table3_1.col2 "\
"JOIN table4 AS table4_1 ON table1.col3 = table4_1.col3")
class SelectTest(TestBase, AssertsCompiledSQL):
"""tests the generative capability of Select"""
@classmethod
def setup_class(cls):
global t1, t2
t1 = table("table1",
column("col1"),
column("col2"),
column("col3"),
)
t2 = table("table2",
column("col1"),
column("col2"),
column("col3"),
)
def test_select(self):
self.assert_compile(t1.select().where(t1.c.col1==5).order_by(t1.c.col3),
"SELECT table1.col1, table1.col2, table1.col3 FROM table1 WHERE table1.col1 = :col1_1 ORDER BY table1.col3")
self.assert_compile(t1.select().select_from(select([t2], t2.c.col1==t1.c.col1)).order_by(t1.c.col3),
"SELECT table1.col1, table1.col2, table1.col3 FROM table1, (SELECT table2.col1 AS col1, table2.col2 AS col2, table2.col3 AS col3 "\
"FROM table2 WHERE table2.col1 = table1.col1) ORDER BY table1.col3")
s = select([t2], t2.c.col1==t1.c.col1, correlate=False)
s = s.correlate(t1).order_by(t2.c.col3)
self.assert_compile(t1.select().select_from(s).order_by(t1.c.col3),
"SELECT table1.col1, table1.col2, table1.col3 FROM table1, (SELECT table2.col1 AS col1, table2.col2 AS col2, table2.col3 AS col3 "\
"FROM table2 WHERE table2.col1 = table1.col1 ORDER BY table2.col3) ORDER BY table1.col3")
def test_columns(self):
s = t1.select()
self.assert_compile(s, "SELECT table1.col1, table1.col2, table1.col3 FROM table1")
select_copy = s.column('yyy')
self.assert_compile(select_copy, "SELECT table1.col1, table1.col2, table1.col3, yyy FROM table1")
assert s.columns is not select_copy.columns
assert s._columns is not select_copy._columns
assert s._raw_columns is not select_copy._raw_columns
self.assert_compile(s, "SELECT table1.col1, table1.col2, table1.col3 FROM table1")
def test_froms(self):
s = t1.select()
self.assert_compile(s, "SELECT table1.col1, table1.col2, table1.col3 FROM table1")
select_copy = s.select_from(t2)
self.assert_compile(select_copy, "SELECT table1.col1, table1.col2, table1.col3 FROM table1, table2")
assert s._froms is not select_copy._froms
self.assert_compile(s, "SELECT table1.col1, table1.col2, table1.col3 FROM table1")
def test_correlation(self):
s = select([t2], t1.c.col1==t2.c.col1)
self.assert_compile(s, "SELECT table2.col1, table2.col2, table2.col3 FROM table2, table1 WHERE table1.col1 = table2.col1")
s2 = select([t1], t1.c.col2==s.c.col2)
self.assert_compile(s2, "SELECT table1.col1, table1.col2, table1.col3 FROM table1, "
"(SELECT table2.col1 AS col1, table2.col2 AS col2, table2.col3 AS col3 FROM table2 "
"WHERE table1.col1 = table2.col1) WHERE table1.col2 = col2")
s3 = s.correlate(None)
self.assert_compile(select([t1], t1.c.col2==s3.c.col2), "SELECT table1.col1, table1.col2, table1.col3 FROM table1, "
"(SELECT table2.col1 AS col1, table2.col2 AS col2, table2.col3 AS col3 FROM table2, table1 "
"WHERE table1.col1 = table2.col1) WHERE table1.col2 = col2")
self.assert_compile(select([t1], t1.c.col2==s.c.col2), "SELECT table1.col1, table1.col2, table1.col3 FROM table1, "
"(SELECT table2.col1 AS col1, table2.col2 AS col2, table2.col3 AS col3 FROM table2 "
"WHERE table1.col1 = table2.col1) WHERE table1.col2 = col2")
s4 = s3.correlate(t1)
self.assert_compile(select([t1], t1.c.col2==s4.c.col2), "SELECT table1.col1, table1.col2, table1.col3 FROM table1, "
"(SELECT table2.col1 AS col1, table2.col2 AS col2, table2.col3 AS col3 FROM table2 "
"WHERE table1.col1 = table2.col1) WHERE table1.col2 = col2")
self.assert_compile(select([t1], t1.c.col2==s3.c.col2), "SELECT table1.col1, table1.col2, table1.col3 FROM table1, "
"(SELECT table2.col1 AS col1, table2.col2 AS col2, table2.col3 AS col3 FROM table2, table1 "
"WHERE table1.col1 = table2.col1) WHERE table1.col2 = col2")
def test_prefixes(self):
s = t1.select()
self.assert_compile(s, "SELECT table1.col1, table1.col2, table1.col3 FROM table1")
select_copy = s.prefix_with("FOOBER")
self.assert_compile(select_copy, "SELECT FOOBER table1.col1, table1.col2, table1.col3 FROM table1")
self.assert_compile(s, "SELECT table1.col1, table1.col2, table1.col3 FROM table1")
def test_execution_options(self):
s = select().execution_options(foo='bar')
s2 = s.execution_options(bar='baz')
s3 = s.execution_options(foo='not bar')
# The original select should not be modified.
assert s._execution_options == dict(foo='bar')
# s2 should have its execution_options based on s, though.
assert s2._execution_options == dict(foo='bar', bar='baz')
assert s3._execution_options == dict(foo='not bar')
# this feature not available yet
def _NOTYET_test_execution_options_in_kwargs(self):
s = select(execution_options=dict(foo='bar'))
s2 = s.execution_options(bar='baz')
# The original select should not be modified.
assert s._execution_options == dict(foo='bar')
# s2 should have its execution_options based on s, though.
assert s2._execution_options == dict(foo='bar', bar='baz')
# this feature not available yet
def _NOTYET_test_execution_options_in_text(self):
s = text('select 42', execution_options=dict(foo='bar'))
assert s._execution_options == dict(foo='bar')
class InsertTest(TestBase, AssertsCompiledSQL):
"""Tests the generative capability of Insert"""
# fixme: consolidate converage from elsewhere here and expand
@classmethod
def setup_class(cls):
global t1, t2
t1 = table("table1",
column("col1"),
column("col2"),
column("col3"),
)
t2 = table("table2",
column("col1"),
column("col2"),
column("col3"),
)
def test_prefixes(self):
i = t1.insert()
self.assert_compile(i,
"INSERT INTO table1 (col1, col2, col3) "
"VALUES (:col1, :col2, :col3)")
gen = i.prefix_with("foober")
self.assert_compile(gen,
"INSERT foober INTO table1 (col1, col2, col3) "
"VALUES (:col1, :col2, :col3)")
self.assert_compile(i,
"INSERT INTO table1 (col1, col2, col3) "
"VALUES (:col1, :col2, :col3)")
i2 = t1.insert(prefixes=['squiznart'])
self.assert_compile(i2,
"INSERT squiznart INTO table1 (col1, col2, col3) "
"VALUES (:col1, :col2, :col3)")
gen2 = i2.prefix_with("quux")
self.assert_compile(gen2,
"INSERT squiznart quux INTO "
"table1 (col1, col2, col3) "
"VALUES (:col1, :col2, :col3)")
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