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sqlalchemy/test/dialect/postgresql/test_query.py
T
Mike Bayer 91f376692d Add future=True to create_engine/Session; unify select() 
Several weeks of using the future_select() construct
has led to the proposal there be just one select() construct
again which features the new join() method, and otherwise accepts
both the 1.x and 2.x argument styles.   This would make
migration simpler and reduce confusion.

However, confusion may be increased by the fact that select().join()
is different  Current thinking is we may be better off
with a few hard behavioral changes to old and relatively unknown APIs
rather than trying to play both sides within two extremely similar
but subtly different APIs.  At the moment, the .join() thing seems
to be the only behavioral change that occurs without the user
taking any explicit steps.   Session.execute() will still
behave the old way as we are adding a future flag.

This change also adds the "future" flag to Session() and
session.execute(), so that interpretation of the incoming statement,
as well as that the new style result is returned, does not
occur for existing applications unless they add the use
of this flag.

The change in general is moving the "removed in 2.0" system
further along where we want the test suite to fully pass
even if the SQLALCHEMY_WARN_20 flag is set.

Get many tests to pass when SQLALCHEMY_WARN_20 is set; this
should be ongoing after this patch merges.

Improve the RemovedIn20 warning; these are all deprecated
"since" 1.4, so ensure that's what the messages read.
Make sure the inforamtion link is on all warnings.
Add deprecation warnings for parameters present and
add warnings to all FromClause.select() types of methods.

Fixes: #5379
Fixes: #5284
Change-Id: I765a0b912b3dcd0e995426427d8bb7997cbffd51
References: #5159
2020-07-08 11:05:11 -04:00

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# coding: utf-8
import datetime
from sqlalchemy import and_
from sqlalchemy import Column
from sqlalchemy import Date
from sqlalchemy import DateTime
from sqlalchemy import exc
from sqlalchemy import extract
from sqlalchemy import ForeignKey
from sqlalchemy import func
from sqlalchemy import Integer
from sqlalchemy import literal
from sqlalchemy import literal_column
from sqlalchemy import MetaData
from sqlalchemy import or_
from sqlalchemy import select
from sqlalchemy import Sequence
from sqlalchemy import String
from sqlalchemy import Table
from sqlalchemy import testing
from sqlalchemy import text
from sqlalchemy import Time
from sqlalchemy import tuple_
from sqlalchemy.dialects import postgresql
from sqlalchemy.testing import assert_raises
from sqlalchemy.testing import AssertsCompiledSQL
from sqlalchemy.testing import AssertsExecutionResults
from sqlalchemy.testing import engines
from sqlalchemy.testing import eq_
from sqlalchemy.testing import expect_warnings
from sqlalchemy.testing import fixtures
from sqlalchemy.testing.assertsql import CursorSQL
from sqlalchemy.testing.assertsql import DialectSQL
matchtable = cattable = None
class InsertTest(fixtures.TestBase, AssertsExecutionResults):
__only_on__ = "postgresql"
__backend__ = True
@classmethod
def setup_class(cls):
cls.metadata = MetaData(testing.db)
def teardown(self):
self.metadata.drop_all()
self.metadata.clear()
def test_foreignkey_missing_insert(self):
Table("t1", self.metadata, Column("id", Integer, primary_key=True))
t2 = Table(
"t2",
self.metadata,
Column("id", Integer, ForeignKey("t1.id"), primary_key=True),
)
self.metadata.create_all()
# want to ensure that "null value in column "id" violates not-
# null constraint" is raised (IntegrityError on psycoopg2, but
# ProgrammingError on pg8000), and not "ProgrammingError:
# (ProgrammingError) relationship "t2_id_seq" does not exist".
# the latter corresponds to autoincrement behavior, which is not
# the case here due to the foreign key.
for eng in [
engines.testing_engine(options={"implicit_returning": False}),
engines.testing_engine(options={"implicit_returning": True}),
]:
with expect_warnings(
".*has no Python-side or server-side default.*"
):
with eng.connect() as conn:
assert_raises(
(exc.IntegrityError, exc.ProgrammingError),
conn.execute,
t2.insert(),
)
def test_sequence_insert(self):
table = Table(
"testtable",
self.metadata,
Column("id", Integer, Sequence("my_seq"), primary_key=True),
Column("data", String(30)),
)
self.metadata.create_all()
self._assert_data_with_sequence(table, "my_seq")
@testing.requires.returning
def test_sequence_returning_insert(self):
table = Table(
"testtable",
self.metadata,
Column("id", Integer, Sequence("my_seq"), primary_key=True),
Column("data", String(30)),
)
self.metadata.create_all()
self._assert_data_with_sequence_returning(table, "my_seq")
def test_opt_sequence_insert(self):
table = Table(
"testtable",
self.metadata,
Column(
"id",
Integer,
Sequence("my_seq", optional=True),
primary_key=True,
),
Column("data", String(30)),
)
self.metadata.create_all()
self._assert_data_autoincrement(table)
@testing.requires.returning
def test_opt_sequence_returning_insert(self):
table = Table(
"testtable",
self.metadata,
Column(
"id",
Integer,
Sequence("my_seq", optional=True),
primary_key=True,
),
Column("data", String(30)),
)
self.metadata.create_all()
self._assert_data_autoincrement_returning(table)
def test_autoincrement_insert(self):
table = Table(
"testtable",
self.metadata,
Column("id", Integer, primary_key=True),
Column("data", String(30)),
)
self.metadata.create_all()
self._assert_data_autoincrement(table)
@testing.requires.returning
def test_autoincrement_returning_insert(self):
table = Table(
"testtable",
self.metadata,
Column("id", Integer, primary_key=True),
Column("data", String(30)),
)
self.metadata.create_all()
self._assert_data_autoincrement_returning(table)
def test_noautoincrement_insert(self):
table = Table(
"testtable",
self.metadata,
Column("id", Integer, primary_key=True, autoincrement=False),
Column("data", String(30)),
)
self.metadata.create_all()
self._assert_data_noautoincrement(table)
def _assert_data_autoincrement(self, table):
engine = engines.testing_engine(options={"implicit_returning": False})
with self.sql_execution_asserter(engine) as asserter:
with engine.connect() as conn:
# execute with explicit id
r = conn.execute(table.insert(), {"id": 30, "data": "d1"})
eq_(r.inserted_primary_key, (30,))
# execute with prefetch id
r = conn.execute(table.insert(), {"data": "d2"})
eq_(r.inserted_primary_key, (1,))
# executemany with explicit ids
conn.execute(
table.insert(),
{"id": 31, "data": "d3"},
{"id": 32, "data": "d4"},
)
# executemany, uses SERIAL
conn.execute(table.insert(), {"data": "d5"}, {"data": "d6"})
# single execute, explicit id, inline
conn.execute(
table.insert(inline=True), {"id": 33, "data": "d7"}
)
# single execute, inline, uses SERIAL
conn.execute(table.insert(inline=True), {"data": "d8"})
asserter.assert_(
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
{"id": 30, "data": "d1"},
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
{"id": 1, "data": "d2"},
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
[{"id": 31, "data": "d3"}, {"id": 32, "data": "d4"}],
),
DialectSQL(
"INSERT INTO testtable (data) VALUES (:data)",
[{"data": "d5"}, {"data": "d6"}],
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
[{"id": 33, "data": "d7"}],
),
DialectSQL(
"INSERT INTO testtable (data) VALUES (:data)", [{"data": "d8"}]
),
)
with engine.connect() as conn:
eq_(
conn.execute(table.select()).fetchall(),
[
(30, "d1"),
(1, "d2"),
(31, "d3"),
(32, "d4"),
(2, "d5"),
(3, "d6"),
(33, "d7"),
(4, "d8"),
],
)
conn.execute(table.delete())
# test the same series of events using a reflected version of
# the table
m2 = MetaData(engine)
table = Table(table.name, m2, autoload=True)
with self.sql_execution_asserter(engine) as asserter:
with engine.connect() as conn:
conn.execute(table.insert(), {"id": 30, "data": "d1"})
r = conn.execute(table.insert(), {"data": "d2"})
eq_(r.inserted_primary_key, (5,))
conn.execute(
table.insert(),
{"id": 31, "data": "d3"},
{"id": 32, "data": "d4"},
)
conn.execute(table.insert(), {"data": "d5"}, {"data": "d6"})
conn.execute(
table.insert(inline=True), {"id": 33, "data": "d7"}
)
conn.execute(table.insert(inline=True), {"data": "d8"})
asserter.assert_(
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
{"id": 30, "data": "d1"},
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
{"id": 5, "data": "d2"},
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
[{"id": 31, "data": "d3"}, {"id": 32, "data": "d4"}],
),
DialectSQL(
"INSERT INTO testtable (data) VALUES (:data)",
[{"data": "d5"}, {"data": "d6"}],
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
[{"id": 33, "data": "d7"}],
),
DialectSQL(
"INSERT INTO testtable (data) VALUES (:data)", [{"data": "d8"}]
),
)
with engine.connect() as conn:
eq_(
conn.execute(table.select()).fetchall(),
[
(30, "d1"),
(5, "d2"),
(31, "d3"),
(32, "d4"),
(6, "d5"),
(7, "d6"),
(33, "d7"),
(8, "d8"),
],
)
conn.execute(table.delete())
def _assert_data_autoincrement_returning(self, table):
engine = engines.testing_engine(options={"implicit_returning": True})
with self.sql_execution_asserter(engine) as asserter:
with engine.connect() as conn:
# execute with explicit id
r = conn.execute(table.insert(), {"id": 30, "data": "d1"})
eq_(r.inserted_primary_key, (30,))
# execute with prefetch id
r = conn.execute(table.insert(), {"data": "d2"})
eq_(r.inserted_primary_key, (1,))
# executemany with explicit ids
conn.execute(
table.insert(),
{"id": 31, "data": "d3"},
{"id": 32, "data": "d4"},
)
# executemany, uses SERIAL
conn.execute(table.insert(), {"data": "d5"}, {"data": "d6"})
# single execute, explicit id, inline
conn.execute(
table.insert(inline=True), {"id": 33, "data": "d7"}
)
# single execute, inline, uses SERIAL
conn.execute(table.insert(inline=True), {"data": "d8"})
asserter.assert_(
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
{"id": 30, "data": "d1"},
),
DialectSQL(
"INSERT INTO testtable (data) VALUES (:data) RETURNING "
"testtable.id",
{"data": "d2"},
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
[{"id": 31, "data": "d3"}, {"id": 32, "data": "d4"}],
),
DialectSQL(
"INSERT INTO testtable (data) VALUES (:data)",
[{"data": "d5"}, {"data": "d6"}],
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
[{"id": 33, "data": "d7"}],
),
DialectSQL(
"INSERT INTO testtable (data) VALUES (:data)", [{"data": "d8"}]
),
)
with engine.connect() as conn:
eq_(
conn.execute(table.select()).fetchall(),
[
(30, "d1"),
(1, "d2"),
(31, "d3"),
(32, "d4"),
(2, "d5"),
(3, "d6"),
(33, "d7"),
(4, "d8"),
],
)
conn.execute(table.delete())
# test the same series of events using a reflected version of
# the table
m2 = MetaData(engine)
table = Table(table.name, m2, autoload=True)
with self.sql_execution_asserter(engine) as asserter:
with engine.connect() as conn:
conn.execute(table.insert(), {"id": 30, "data": "d1"})
r = conn.execute(table.insert(), {"data": "d2"})
eq_(r.inserted_primary_key, (5,))
conn.execute(
table.insert(),
{"id": 31, "data": "d3"},
{"id": 32, "data": "d4"},
)
conn.execute(table.insert(), {"data": "d5"}, {"data": "d6"})
conn.execute(
table.insert(inline=True), {"id": 33, "data": "d7"}
)
conn.execute(table.insert(inline=True), {"data": "d8"})
asserter.assert_(
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
{"id": 30, "data": "d1"},
),
DialectSQL(
"INSERT INTO testtable (data) VALUES (:data) RETURNING "
"testtable.id",
{"data": "d2"},
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
[{"id": 31, "data": "d3"}, {"id": 32, "data": "d4"}],
),
DialectSQL(
"INSERT INTO testtable (data) VALUES (:data)",
[{"data": "d5"}, {"data": "d6"}],
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
[{"id": 33, "data": "d7"}],
),
DialectSQL(
"INSERT INTO testtable (data) VALUES (:data)", [{"data": "d8"}]
),
)
with engine.connect() as conn:
eq_(
conn.execute(table.select()).fetchall(),
[
(30, "d1"),
(5, "d2"),
(31, "d3"),
(32, "d4"),
(6, "d5"),
(7, "d6"),
(33, "d7"),
(8, "d8"),
],
)
conn.execute(table.delete())
def _assert_data_with_sequence(self, table, seqname):
engine = engines.testing_engine(options={"implicit_returning": False})
with self.sql_execution_asserter(engine) as asserter:
with engine.connect() as conn:
conn.execute(table.insert(), {"id": 30, "data": "d1"})
conn.execute(table.insert(), {"data": "d2"})
conn.execute(
table.insert(),
{"id": 31, "data": "d3"},
{"id": 32, "data": "d4"},
)
conn.execute(table.insert(), {"data": "d5"}, {"data": "d6"})
conn.execute(
table.insert(inline=True), {"id": 33, "data": "d7"}
)
conn.execute(table.insert(inline=True), {"data": "d8"})
asserter.assert_(
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
{"id": 30, "data": "d1"},
),
CursorSQL("select nextval('my_seq')", consume_statement=False),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
{"id": 1, "data": "d2"},
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
[{"id": 31, "data": "d3"}, {"id": 32, "data": "d4"}],
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (nextval('%s'), "
":data)" % seqname,
[{"data": "d5"}, {"data": "d6"}],
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
[{"id": 33, "data": "d7"}],
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (nextval('%s'), "
":data)" % seqname,
[{"data": "d8"}],
),
)
with engine.connect() as conn:
eq_(
conn.execute(table.select()).fetchall(),
[
(30, "d1"),
(1, "d2"),
(31, "d3"),
(32, "d4"),
(2, "d5"),
(3, "d6"),
(33, "d7"),
(4, "d8"),
],
)
# cant test reflection here since the Sequence must be
# explicitly specified
def _assert_data_with_sequence_returning(self, table, seqname):
engine = engines.testing_engine(options={"implicit_returning": True})
with self.sql_execution_asserter(engine) as asserter:
with engine.connect() as conn:
conn.execute(table.insert(), {"id": 30, "data": "d1"})
conn.execute(table.insert(), {"data": "d2"})
conn.execute(
table.insert(),
{"id": 31, "data": "d3"},
{"id": 32, "data": "d4"},
)
conn.execute(table.insert(), {"data": "d5"}, {"data": "d6"})
conn.execute(
table.insert(inline=True), {"id": 33, "data": "d7"}
)
conn.execute(table.insert(inline=True), {"data": "d8"})
asserter.assert_(
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
{"id": 30, "data": "d1"},
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES "
"(nextval('my_seq'), :data) RETURNING testtable.id",
{"data": "d2"},
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
[{"id": 31, "data": "d3"}, {"id": 32, "data": "d4"}],
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (nextval('%s'), "
":data)" % seqname,
[{"data": "d5"}, {"data": "d6"}],
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (:id, :data)",
[{"id": 33, "data": "d7"}],
),
DialectSQL(
"INSERT INTO testtable (id, data) VALUES (nextval('%s'), "
":data)" % seqname,
[{"data": "d8"}],
),
)
with engine.connect() as conn:
eq_(
conn.execute(table.select()).fetchall(),
[
(30, "d1"),
(1, "d2"),
(31, "d3"),
(32, "d4"),
(2, "d5"),
(3, "d6"),
(33, "d7"),
(4, "d8"),
],
)
# cant test reflection here since the Sequence must be
# explicitly specified
def _assert_data_noautoincrement(self, table):
engine = engines.testing_engine(options={"implicit_returning": False})
# turning off the cache because we are checking for compile-time
# warnings
with engine.connect().execution_options(compiled_cache=None) as conn:
conn.execute(table.insert(), {"id": 30, "data": "d1"})
with expect_warnings(
".*has no Python-side or server-side default.*"
):
assert_raises(
(exc.IntegrityError, exc.ProgrammingError),
conn.execute,
table.insert(),
{"data": "d2"},
)
with expect_warnings(
".*has no Python-side or server-side default.*"
):
assert_raises(
(exc.IntegrityError, exc.ProgrammingError),
conn.execute,
table.insert(),
{"data": "d2"},
{"data": "d3"},
)
with expect_warnings(
".*has no Python-side or server-side default.*"
):
assert_raises(
(exc.IntegrityError, exc.ProgrammingError),
conn.execute,
table.insert(),
{"data": "d2"},
)
with expect_warnings(
".*has no Python-side or server-side default.*"
):
assert_raises(
(exc.IntegrityError, exc.ProgrammingError),
conn.execute,
table.insert(),
{"data": "d2"},
{"data": "d3"},
)
conn.execute(
table.insert(),
{"id": 31, "data": "d2"},
{"id": 32, "data": "d3"},
)
conn.execute(table.insert(inline=True), {"id": 33, "data": "d4"})
eq_(
conn.execute(table.select()).fetchall(),
[(30, "d1"), (31, "d2"), (32, "d3"), (33, "d4")],
)
conn.execute(table.delete())
# test the same series of events using a reflected version of
# the table
m2 = MetaData(engine)
table = Table(table.name, m2, autoload=True)
with engine.connect() as conn:
conn.execute(table.insert(), {"id": 30, "data": "d1"})
with expect_warnings(
".*has no Python-side or server-side default.*"
):
assert_raises(
(exc.IntegrityError, exc.ProgrammingError),
conn.execute,
table.insert(),
{"data": "d2"},
)
with expect_warnings(
".*has no Python-side or server-side default.*"
):
assert_raises(
(exc.IntegrityError, exc.ProgrammingError),
conn.execute,
table.insert(),
{"data": "d2"},
{"data": "d3"},
)
conn.execute(
table.insert(),
{"id": 31, "data": "d2"},
{"id": 32, "data": "d3"},
)
conn.execute(table.insert(inline=True), {"id": 33, "data": "d4"})
eq_(
conn.execute(table.select()).fetchall(),
[(30, "d1"), (31, "d2"), (32, "d3"), (33, "d4")],
)
class MatchTest(fixtures.TestBase, AssertsCompiledSQL):
__only_on__ = "postgresql >= 8.3"
__backend__ = True
@classmethod
def setup_class(cls):
global metadata, cattable, matchtable
metadata = MetaData(testing.db)
cattable = Table(
"cattable",
metadata,
Column("id", Integer, primary_key=True),
Column("description", String(50)),
)
matchtable = Table(
"matchtable",
metadata,
Column("id", Integer, primary_key=True),
Column("title", String(200)),
Column("category_id", Integer, ForeignKey("cattable.id")),
)
metadata.create_all()
cattable.insert().execute(
[
{"id": 1, "description": "Python"},
{"id": 2, "description": "Ruby"},
]
)
matchtable.insert().execute(
[
{
"id": 1,
"title": "Agile Web Development with Rails",
"category_id": 2,
},
{"id": 2, "title": "Dive Into Python", "category_id": 1},
{
"id": 3,
"title": "Programming Matz's Ruby",
"category_id": 2,
},
{
"id": 4,
"title": "The Definitive Guide to Django",
"category_id": 1,
},
{"id": 5, "title": "Python in a Nutshell", "category_id": 1},
]
)
@classmethod
def teardown_class(cls):
metadata.drop_all()
@testing.fails_on("postgresql+pg8000", "uses positional")
def test_expression_pyformat(self):
self.assert_compile(
matchtable.c.title.match("somstr"),
"matchtable.title @@ to_tsquery(%(title_1)s" ")",
)
@testing.fails_on("postgresql+psycopg2", "uses pyformat")
@testing.fails_on("postgresql+pypostgresql", "uses pyformat")
@testing.fails_on("postgresql+pygresql", "uses pyformat")
@testing.fails_on("postgresql+psycopg2cffi", "uses pyformat")
def test_expression_positional(self):
self.assert_compile(
matchtable.c.title.match("somstr"),
"matchtable.title @@ to_tsquery(%s)",
)
def test_simple_match(self):
results = (
matchtable.select()
.where(matchtable.c.title.match("python"))
.order_by(matchtable.c.id)
.execute()
.fetchall()
)
eq_([2, 5], [r.id for r in results])
def test_not_match(self):
results = (
matchtable.select()
.where(~matchtable.c.title.match("python"))
.order_by(matchtable.c.id)
.execute()
.fetchall()
)
eq_([1, 3, 4], [r.id for r in results])
def test_simple_match_with_apostrophe(self):
results = (
matchtable.select()
.where(matchtable.c.title.match("Matz's"))
.execute()
.fetchall()
)
eq_([3], [r.id for r in results])
def test_simple_derivative_match(self):
results = (
matchtable.select()
.where(matchtable.c.title.match("nutshells"))
.execute()
.fetchall()
)
eq_([5], [r.id for r in results])
def test_or_match(self):
results1 = (
matchtable.select()
.where(
or_(
matchtable.c.title.match("nutshells"),
matchtable.c.title.match("rubies"),
)
)
.order_by(matchtable.c.id)
.execute()
.fetchall()
)
eq_([3, 5], [r.id for r in results1])
results2 = (
matchtable.select()
.where(matchtable.c.title.match("nutshells | rubies"))
.order_by(matchtable.c.id)
.execute()
.fetchall()
)
eq_([3, 5], [r.id for r in results2])
def test_and_match(self):
results1 = (
matchtable.select()
.where(
and_(
matchtable.c.title.match("python"),
matchtable.c.title.match("nutshells"),
)
)
.execute()
.fetchall()
)
eq_([5], [r.id for r in results1])
results2 = (
matchtable.select()
.where(matchtable.c.title.match("python & nutshells"))
.execute()
.fetchall()
)
eq_([5], [r.id for r in results2])
def test_match_across_joins(self):
results = (
matchtable.select()
.where(
and_(
cattable.c.id == matchtable.c.category_id,
or_(
cattable.c.description.match("Ruby"),
matchtable.c.title.match("nutshells"),
),
)
)
.order_by(matchtable.c.id)
.execute()
.fetchall()
)
eq_([1, 3, 5], [r.id for r in results])
class TupleTest(fixtures.TestBase):
__only_on__ = "postgresql"
__backend__ = True
def test_tuple_containment(self, connection):
for test, exp in [
([("a", "b")], True),
([("a", "c")], False),
([("f", "q"), ("a", "b")], True),
([("f", "q"), ("a", "c")], False),
]:
eq_(
connection.execute(
select(
[
tuple_(
literal_column("'a'"), literal_column("'b'")
).in_(
[
tuple_(
*[
literal_column("'%s'" % letter)
for letter in elem
]
)
for elem in test
]
)
]
)
).scalar(),
exp,
)
class ExtractTest(fixtures.TablesTest):
"""The rationale behind this test is that for many years we've had a system
of embedding type casts into the expressions rendered by visit_extract()
on the postgreql platform. The reason for this cast is not clear.
So here we try to produce a wide range of cases to ensure that these casts
are not needed; see [ticket:2740].
"""
__only_on__ = "postgresql"
__backend__ = True
run_inserts = "once"
run_deletes = None
@classmethod
def setup_bind(cls):
from sqlalchemy import event
eng = engines.testing_engine()
@event.listens_for(eng, "connect")
def connect(dbapi_conn, rec):
cursor = dbapi_conn.cursor()
cursor.execute("SET SESSION TIME ZONE 0")
cursor.close()
return eng
@classmethod
def define_tables(cls, metadata):
Table(
"t",
metadata,
Column("id", Integer, primary_key=True),
Column("dtme", DateTime),
Column("dt", Date),
Column("tm", Time),
Column("intv", postgresql.INTERVAL),
Column("dttz", DateTime(timezone=True)),
)
@classmethod
def insert_data(cls, connection):
# TODO: why does setting hours to anything
# not affect the TZ in the DB col ?
class TZ(datetime.tzinfo):
def utcoffset(self, dt):
return datetime.timedelta(hours=4)
connection.execute(
cls.tables.t.insert(),
{
"dtme": datetime.datetime(2012, 5, 10, 12, 15, 25),
"dt": datetime.date(2012, 5, 10),
"tm": datetime.time(12, 15, 25),
"intv": datetime.timedelta(seconds=570),
"dttz": datetime.datetime(
2012, 5, 10, 12, 15, 25, tzinfo=TZ()
),
},
)
def _test(self, expr, field="all", overrides=None):
t = self.tables.t
if field == "all":
fields = {
"year": 2012,
"month": 5,
"day": 10,
"epoch": 1336652125.0,
"hour": 12,
"minute": 15,
}
elif field == "time":
fields = {"hour": 12, "minute": 15, "second": 25}
elif field == "date":
fields = {"year": 2012, "month": 5, "day": 10}
elif field == "all+tz":
fields = {
"year": 2012,
"month": 5,
"day": 10,
"epoch": 1336637725.0,
"hour": 8,
"timezone": 0,
}
else:
fields = field
if overrides:
fields.update(overrides)
for field in fields:
result = self.bind.scalar(
select(extract(field, expr)).select_from(t)
)
eq_(result, fields[field])
def test_one(self):
t = self.tables.t
self._test(t.c.dtme, "all")
def test_two(self):
t = self.tables.t
self._test(
t.c.dtme + t.c.intv,
overrides={"epoch": 1336652695.0, "minute": 24},
)
def test_three(self):
self.tables.t
actual_ts = self.bind.scalar(
func.current_timestamp()
) - datetime.timedelta(days=5)
self._test(
func.current_timestamp() - datetime.timedelta(days=5),
{
"hour": actual_ts.hour,
"year": actual_ts.year,
"month": actual_ts.month,
},
)
def test_four(self):
t = self.tables.t
self._test(
datetime.timedelta(days=5) + t.c.dt,
overrides={
"day": 15,
"epoch": 1337040000.0,
"hour": 0,
"minute": 0,
},
)
def test_five(self):
t = self.tables.t
self._test(
func.coalesce(t.c.dtme, func.current_timestamp()),
overrides={"epoch": 1336652125.0},
)
def test_six(self):
t = self.tables.t
self._test(
t.c.tm + datetime.timedelta(seconds=30),
"time",
overrides={"second": 55},
)
def test_seven(self):
self._test(
literal(datetime.timedelta(seconds=10))
- literal(datetime.timedelta(seconds=10)),
"all",
overrides={
"hour": 0,
"minute": 0,
"month": 0,
"year": 0,
"day": 0,
"epoch": 0,
},
)
def test_eight(self):
t = self.tables.t
self._test(
t.c.tm + datetime.timedelta(seconds=30),
{"hour": 12, "minute": 15, "second": 55},
)
def test_nine(self):
self._test(text("t.dt + t.tm"))
def test_ten(self):
t = self.tables.t
self._test(t.c.dt + t.c.tm)
def test_eleven(self):
self._test(
func.current_timestamp() - func.current_timestamp(),
{"year": 0, "month": 0, "day": 0, "hour": 0},
)
def test_twelve(self):
t = self.tables.t
actual_ts = self.bind.scalar(func.current_timestamp()).replace(
tzinfo=None
) - datetime.datetime(2012, 5, 10, 12, 15, 25)
self._test(
func.current_timestamp()
- func.coalesce(t.c.dtme, func.current_timestamp()),
{"day": actual_ts.days},
)
def test_thirteen(self):
t = self.tables.t
self._test(t.c.dttz, "all+tz")
def test_fourteen(self):
t = self.tables.t
self._test(t.c.tm, "time")
def test_fifteen(self):
t = self.tables.t
self._test(
datetime.timedelta(days=5) + t.c.dtme,
overrides={"day": 15, "epoch": 1337084125.0},
)
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