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90c8d8e0c9e2d0a9eeace7fa326df26a5f28465a
sqlalchemy/test/sql/test_generative.py
T
Mike Bayer e4bc7d2894 - move LIMIT/OFFSET rendering to be as bind parameters, for all backends 
which support it.  This includes SQLite, MySQL, Postgresql, Firebird,
Oracle (already used binds with ROW NUMBER OVER), MSSQL (when ROW NUMBER
is used, not TOP).   Not included are Informix, Sybase, MaxDB, Access
[ticket:805]
- LIMIT/OFFSET parameters need to stay as literals within SQL
constructs.  This because they may not be renderable as binds on
some backends.
2010-08-29 16:35:02 -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 :param_1 OFFSET :param_2",
{'param_1':5, 'param_2':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 :param_1 OFFSET :param_2) AS anon_1 "\
"LEFT OUTER JOIN table2 ON anon_1.col1 = table2.col1",
{'param_1':5, 'param_2':10}
)
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 :param_1 OFFSET :param_2) AS anon_1 "\
"LEFT OUTER JOIN table1 AS bar ON anon_1.col1 = bar.col1",
{'param_1':5, 'param_2':10})
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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