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# -*- encoding: utf-8
from sqlalchemy.testing import eq_, is_, in_
from sqlalchemy import *
from sqlalchemy import types, schema, event
from sqlalchemy.databases import mssql
from sqlalchemy.testing import (fixtures,
AssertsCompiledSQL,
ComparesTables)
from sqlalchemy import testing
from sqlalchemy.engine.reflection import Inspector
from sqlalchemy import util
from sqlalchemy.dialects.mssql.information_schema import CoerceUnicode, tables
from sqlalchemy.dialects.mssql import base
from sqlalchemy.testing import mock
class ReflectionTest(fixtures.TestBase, ComparesTables, AssertsCompiledSQL):
__only_on__ = 'mssql'
__backend__ = True
@testing.provide_metadata
def test_basic_reflection(self):
meta = self.metadata
users = Table(
'engine_users',
meta,
Column('user_id', types.INT, primary_key=True),
Column('user_name', types.VARCHAR(20), nullable=False),
Column('test1', types.CHAR(5), nullable=False),
Column('test2', types.Float(5), nullable=False),
Column('test3', types.Text()),
Column('test4', types.Numeric, nullable=False),
Column('test5', types.DateTime),
Column('parent_user_id', types.Integer,
ForeignKey('engine_users.user_id')),
Column('test6', types.DateTime, nullable=False),
Column('test7', types.Text()),
Column('test8', types.LargeBinary()),
Column('test_passivedefault2', types.Integer,
server_default='5'),
Column('test9', types.BINARY(100)),
Column('test_numeric', types.Numeric()),
)
addresses = Table(
'engine_email_addresses',
meta,
Column('address_id', types.Integer, primary_key=True),
Column('remote_user_id', types.Integer,
ForeignKey(users.c.user_id)),
Column('email_address', types.String(20)),
)
meta.create_all()
meta2 = MetaData()
reflected_users = Table('engine_users', meta2,
autoload=True,
autoload_with=testing.db)
reflected_addresses = Table('engine_email_addresses',
meta2,
autoload=True,
autoload_with=testing.db)
self.assert_tables_equal(users, reflected_users)
self.assert_tables_equal(addresses, reflected_addresses)
@testing.provide_metadata
def _test_specific_type(self, type_obj, ddl):
metadata = self.metadata
table = Table(
'type_test', metadata,
Column('col1', type_obj)
)
table.create()
m2 = MetaData()
table2 = Table('type_test', m2, autoload_with=testing.db)
self.assert_compile(
schema.CreateTable(table2),
"CREATE TABLE type_test (col1 %s NULL)" % ddl
)
def test_xml_type(self):
self._test_specific_type(mssql.XML, "XML")
def test_image_type(self):
self._test_specific_type(mssql.IMAGE, "IMAGE")
def test_money_type(self):
self._test_specific_type(mssql.MONEY, "MONEY")
@testing.provide_metadata
def test_identity(self):
metadata = self.metadata
table = Table(
'identity_test', metadata,
Column('col1', Integer, Sequence('fred', 2, 3), primary_key=True)
)
table.create()
meta2 = MetaData(testing.db)
table2 = Table('identity_test', meta2, autoload=True)
sequence = isinstance(table2.c['col1'].default, schema.Sequence) \
and table2.c['col1'].default
assert sequence.start == 2
assert sequence.increment == 3
@testing.emits_warning("Did not recognize")
@testing.provide_metadata
def test_skip_types(self):
metadata = self.metadata
testing.db.execute("""
create table foo (id integer primary key, data xml)
""")
with mock.patch.object(
testing.db.dialect, "ischema_names", {"int": mssql.INTEGER}):
t1 = Table('foo', metadata, autoload=True)
assert isinstance(t1.c.id.type, Integer)
assert isinstance(t1.c.data.type, types.NullType)
@testing.provide_metadata
def test_db_qualified_items(self):
metadata = self.metadata
Table('foo', metadata, Column('id', Integer, primary_key=True))
Table('bar',
metadata,
Column('id', Integer, primary_key=True),
Column('foo_id', Integer, ForeignKey('foo.id', name="fkfoo")))
metadata.create_all()
dbname = testing.db.scalar("select db_name()")
owner = testing.db.scalar("SELECT user_name()")
referred_schema = '%(dbname)s.%(owner)s' % {
"dbname": dbname, "owner": owner}
inspector = inspect(testing.db)
bar_via_db = inspector.get_foreign_keys(
"bar", schema=referred_schema)
eq_(
bar_via_db,
[{
'referred_table': 'foo',
'referred_columns': ['id'],
'referred_schema': referred_schema,
'name': 'fkfoo',
'constrained_columns': ['foo_id']}]
)
assert testing.db.has_table("bar", schema=referred_schema)
m2 = MetaData()
Table('bar', m2, schema=referred_schema, autoload=True,
autoload_with=testing.db)
eq_(m2.tables["%s.foo" % referred_schema].schema, referred_schema)
@testing.provide_metadata
def test_indexes_cols(self):
metadata = self.metadata
t1 = Table('t', metadata, Column('x', Integer), Column('y', Integer))
Index('foo', t1.c.x, t1.c.y)
metadata.create_all()
m2 = MetaData()
t2 = Table('t', m2, autoload=True, autoload_with=testing.db)
eq_(
set(list(t2.indexes)[0].columns),
set([t2.c['x'], t2.c.y])
)
@testing.provide_metadata
def test_indexes_cols_with_commas(self):
metadata = self.metadata
t1 = Table('t',
metadata,
Column('x, col', Integer, key='x'),
Column('y', Integer))
Index('foo', t1.c.x, t1.c.y)
metadata.create_all()
m2 = MetaData()
t2 = Table('t', m2, autoload=True, autoload_with=testing.db)
eq_(
set(list(t2.indexes)[0].columns),
set([t2.c['x, col'], t2.c.y])
)
@testing.provide_metadata
def test_indexes_cols_with_spaces(self):
metadata = self.metadata
t1 = Table('t',
metadata,
Column('x col', Integer, key='x'),
Column('y', Integer))
Index('foo', t1.c.x, t1.c.y)
metadata.create_all()
m2 = MetaData()
t2 = Table('t', m2, autoload=True, autoload_with=testing.db)
eq_(
set(list(t2.indexes)[0].columns),
set([t2.c['x col'], t2.c.y])
)
@testing.provide_metadata
def test_max_ident_in_varchar_not_present(self):
"""test [ticket:3504].
Here we are testing not just that the "max" token comes back
as None, but also that these types accept "max" as the value
of "length" on construction, which isn't a directly documented
pattern however is likely in common use.
"""
metadata = self.metadata
Table(
't', metadata,
Column('t1', types.String),
Column('t2', types.Text('max')),
Column('t3', types.Text('max')),
Column('t4', types.LargeBinary('max')),
Column('t5', types.VARBINARY('max')),
)
metadata.create_all()
for col in inspect(testing.db).get_columns('t'):
is_(col['type'].length, None)
in_('max', str(col['type'].compile(dialect=testing.db.dialect)))
class InfoCoerceUnicodeTest(fixtures.TestBase, AssertsCompiledSQL):
def test_info_unicode_coercion(self):
dialect = mssql.dialect()
value = CoerceUnicode().bind_processor(dialect)('a string')
assert isinstance(value, util.text_type)
def test_info_unicode_cast_no_2000(self):
dialect = mssql.dialect()
dialect.server_version_info = base.MS_2000_VERSION
stmt = tables.c.table_name == 'somename'
self.assert_compile(
stmt,
"[INFORMATION_SCHEMA].[TABLES].[TABLE_NAME] = :table_name_1",
dialect=dialect
)
def test_info_unicode_cast(self):
dialect = mssql.dialect()
dialect.server_version_info = base.MS_2005_VERSION
stmt = tables.c.table_name == 'somename'
self.assert_compile(
stmt,
"[INFORMATION_SCHEMA].[TABLES].[TABLE_NAME] = "
"CAST(:table_name_1 AS NVARCHAR(max))",
dialect=dialect
)
class ReflectHugeViewTest(fixtures.TestBase):
__only_on__ = 'mssql'
__backend__ = True
# crashes on freetds 0.91, not worth it
__skip_if__ = (
lambda: testing.requires.mssql_freetds.enabled,
)
def setup(self):
self.col_num = 150
self.metadata = MetaData(testing.db)
t = Table('base_table', self.metadata,
*[Column("long_named_column_number_%d" % i, Integer)
for i in range(self.col_num)
]
)
self.view_str = view_str = \
"CREATE VIEW huge_named_view AS SELECT %s FROM base_table" % (
",".join("long_named_column_number_%d" % i
for i in range(self.col_num))
)
assert len(view_str) > 4000
event.listen(t, 'after_create', DDL(view_str))
event.listen(t, 'before_drop', DDL("DROP VIEW huge_named_view"))
self.metadata.create_all()
def teardown(self):
self.metadata.drop_all()
def test_inspect_view_definition(self):
inspector = Inspector.from_engine(testing.db)
view_def = inspector.get_view_definition("huge_named_view")
eq_(view_def, self.view_str)
|
