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|
from sqlalchemy import alias
from sqlalchemy import Column
from sqlalchemy import column
from sqlalchemy import Enum
from sqlalchemy import exc
from sqlalchemy import ForeignKey
from sqlalchemy import Integer
from sqlalchemy import String
from sqlalchemy import Table
from sqlalchemy import testing
from sqlalchemy import true
from sqlalchemy.engine import default
from sqlalchemy.sql import select
from sqlalchemy.sql import Values
from sqlalchemy.sql.compiler import FROM_LINTING
from sqlalchemy.testing import AssertsCompiledSQL
from sqlalchemy.testing import expect_raises_message
from sqlalchemy.testing import fixtures
from sqlalchemy.util import OrderedDict
class ValuesTest(fixtures.TablesTest, AssertsCompiledSQL):
__dialect__ = default.DefaultDialect(supports_native_boolean=True)
run_setup_bind = None
run_create_tables = None
@classmethod
def define_tables(cls, metadata):
Table(
"people",
metadata,
Column("people_id", Integer, primary_key=True),
Column("age", Integer),
Column("name", String(30)),
)
Table(
"bookcases",
metadata,
Column("bookcase_id", Integer, primary_key=True),
Column(
"bookcase_owner_id", Integer, ForeignKey("people.people_id")
),
Column("bookcase_shelves", Integer),
Column("bookcase_width", Integer),
)
Table(
"books",
metadata,
Column("book_id", Integer, primary_key=True),
Column(
"bookcase_id", Integer, ForeignKey("bookcases.bookcase_id")
),
Column("book_owner_id", Integer, ForeignKey("people.people_id")),
Column("book_weight", Integer),
)
def test_wrong_number_of_elements(self):
v1 = Values(
column("CaseSensitive", Integer),
column("has spaces", String),
name="Spaces and Cases",
).data([(1, "textA", 99), (2, "textB", 88)])
with expect_raises_message(
exc.ArgumentError,
r"Wrong number of elements for 2-tuple: \(1, 'textA', 99\)",
):
str(v1)
def test_column_quoting(self):
v1 = Values(
column("CaseSensitive", Integer),
column("has spaces", String),
column("number", Integer),
name="Spaces and Cases",
).data([(1, "textA", 99), (2, "textB", 88)])
self.assert_compile(
select(v1),
'SELECT "Spaces and Cases"."CaseSensitive", '
'"Spaces and Cases"."has spaces", "Spaces and Cases".number FROM '
"(VALUES (:param_1, :param_2, :param_3), "
"(:param_4, :param_5, :param_6)) "
'AS "Spaces and Cases" ("CaseSensitive", "has spaces", number)',
)
def test_values_in_cte_params(self):
cte1 = select(
Values(
column("col1", String),
column("col2", Integer),
name="temp_table",
).data([("a", 2), ("b", 3)])
).cte("cte1")
cte2 = select(cte1.c.col1).where(cte1.c.col1 == "q").cte("cte2")
stmt = select(cte2.c.col1)
dialect = default.DefaultDialect()
dialect.positional = True
dialect.paramstyle = "numeric"
self.assert_compile(
stmt,
"WITH cte1 AS (SELECT temp_table.col1 AS col1, "
"temp_table.col2 AS col2 FROM (VALUES (:1, :2), (:3, :4)) AS "
"temp_table (col1, col2)), "
"cte2 AS "
"(SELECT cte1.col1 AS col1 FROM cte1 WHERE cte1.col1 = :5) "
"SELECT cte2.col1 FROM cte2",
checkpositional=("a", 2, "b", 3, "q"),
dialect=dialect,
)
self.assert_compile(
stmt,
"WITH cte1 AS (SELECT temp_table.col1 AS col1, "
"temp_table.col2 AS col2 FROM (VALUES ('a', 2), ('b', 3)) "
"AS temp_table (col1, col2)), "
"cte2 AS "
"(SELECT cte1.col1 AS col1 FROM cte1 WHERE cte1.col1 = 'q') "
"SELECT cte2.col1 FROM cte2",
literal_binds=True,
dialect=dialect,
)
def test_values_in_cte_literal_binds(self):
cte1 = select(
Values(
column("col1", String),
column("col2", Integer),
name="temp_table",
literal_binds=True,
).data([("a", 2), ("b", 3)])
).cte("cte1")
cte2 = select(cte1.c.col1).where(cte1.c.col1 == "q").cte("cte2")
stmt = select(cte2.c.col1)
self.assert_compile(
stmt,
"WITH cte1 AS (SELECT temp_table.col1 AS col1, "
"temp_table.col2 AS col2 FROM (VALUES ('a', 2), ('b', 3)) "
"AS temp_table (col1, col2)), "
"cte2 AS "
"(SELECT cte1.col1 AS col1 FROM cte1 WHERE cte1.col1 = :col1_1) "
"SELECT cte2.col1 FROM cte2",
checkparams={"col1_1": "q"},
)
@testing.fixture
def literal_parameter_fixture(self):
def go(literal_binds, omit=None):
cols = [
column("mykey", Integer),
column("mytext", String),
column("myint", Integer),
]
if omit:
for idx in omit:
cols[idx] = column(cols[idx].name)
return Values(
*cols, name="myvalues", literal_binds=literal_binds
).data([(1, "textA", 99), (2, "textB", 88)])
return go
@testing.fixture
def tricky_types_parameter_fixture(self):
class SomeEnum(object):
# Implements PEP 435 in the minimal fashion needed by SQLAlchemy
__members__ = OrderedDict()
def __init__(self, name, value, alias=None):
self.name = name
self.value = value
self.__members__[name] = self
setattr(self.__class__, name, self)
if alias:
self.__members__[alias] = self
setattr(self.__class__, alias, self)
one = SomeEnum("one", 1)
two = SomeEnum("two", 2)
class MumPyString(str):
"""some kind of string, can't imagine where such a thing might
be found
"""
class MumPyNumber(int):
"""some kind of int, can't imagine where such a thing might
be found
"""
def go(literal_binds, omit=None):
cols = [
column("mykey", Integer),
column("mytext", String),
column("myenum", Enum(SomeEnum)),
]
if omit:
for idx in omit:
cols[idx] = column(cols[idx].name)
return Values(
*cols, name="myvalues", literal_binds=literal_binds
).data(
[
(MumPyNumber(1), MumPyString("textA"), one),
(MumPyNumber(2), MumPyString("textB"), two),
]
)
return go
def test_bound_parameters(self, literal_parameter_fixture):
literal_parameter_fixture = literal_parameter_fixture(False)
stmt = select(literal_parameter_fixture)
self.assert_compile(
stmt,
"SELECT myvalues.mykey, myvalues.mytext, myvalues.myint FROM "
"(VALUES (:param_1, :param_2, :param_3), "
"(:param_4, :param_5, :param_6)"
") AS myvalues (mykey, mytext, myint)",
checkparams={
"param_1": 1,
"param_2": "textA",
"param_3": 99,
"param_4": 2,
"param_5": "textB",
"param_6": 88,
},
)
def test_literal_parameters(self, literal_parameter_fixture):
literal_parameter_fixture = literal_parameter_fixture(True)
stmt = select(literal_parameter_fixture)
self.assert_compile(
stmt,
"SELECT myvalues.mykey, myvalues.mytext, myvalues.myint FROM "
"(VALUES (1, 'textA', 99), (2, 'textB', 88)"
") AS myvalues (mykey, mytext, myint)",
checkparams={},
)
def test_literal_parameters_not_every_type_given(
self, literal_parameter_fixture
):
literal_parameter_fixture = literal_parameter_fixture(True, omit=(1,))
stmt = select(literal_parameter_fixture)
self.assert_compile(
stmt,
"SELECT myvalues.mykey, myvalues.mytext, myvalues.myint FROM "
"(VALUES (1, 'textA', 99), (2, 'textB', 88)"
") AS myvalues (mykey, mytext, myint)",
checkparams={},
)
def test_use_cols_tricky_not_every_type_given(
self, tricky_types_parameter_fixture
):
literal_parameter_fixture = tricky_types_parameter_fixture(
True, omit=(1,)
)
stmt = select(literal_parameter_fixture)
with expect_raises_message(
exc.CompileError,
r"No literal value renderer is available for literal "
r"value \"'textA'\" with datatype NULL",
):
str(stmt)
def test_use_cols_for_types(self, tricky_types_parameter_fixture):
literal_parameter_fixture = tricky_types_parameter_fixture(True)
stmt = select(literal_parameter_fixture)
self.assert_compile(
stmt,
"SELECT myvalues.mykey, myvalues.mytext, myvalues.myenum FROM "
"(VALUES (1, 'textA', 'one'), (2, 'textB', 'two')"
") AS myvalues (mykey, mytext, myenum)",
checkparams={},
)
def test_with_join_unnamed(self):
people = self.tables.people
values = Values(
column("column1", Integer),
column("column2", Integer),
).data([(1, 1), (2, 1), (3, 2), (3, 3)])
stmt = select(people, values).select_from(
people.join(values, values.c.column2 == people.c.people_id)
)
self.assert_compile(
stmt,
"SELECT people.people_id, people.age, people.name, column1, "
"column2 FROM people JOIN (VALUES (:param_1, :param_2), "
"(:param_3, :param_4), (:param_5, :param_6), "
"(:param_7, :param_8)) "
"ON people.people_id = column2",
checkparams={
"param_1": 1,
"param_2": 1,
"param_3": 2,
"param_4": 1,
"param_5": 3,
"param_6": 2,
"param_7": 3,
"param_8": 3,
},
)
def test_with_join_named(self):
people = self.tables.people
values = Values(
column("bookcase_id", Integer),
column("bookcase_owner_id", Integer),
name="bookcases",
).data([(1, 1), (2, 1), (3, 2), (3, 3)])
stmt = select(people, values).select_from(
people.join(
values, values.c.bookcase_owner_id == people.c.people_id
)
)
self.assert_compile(
stmt,
"SELECT people.people_id, people.age, people.name, "
"bookcases.bookcase_id, bookcases.bookcase_owner_id FROM people "
"JOIN (VALUES (:param_1, :param_2), (:param_3, :param_4), "
"(:param_5, :param_6), (:param_7, :param_8)) AS bookcases "
"(bookcase_id, bookcase_owner_id) "
"ON people.people_id = bookcases.bookcase_owner_id",
checkparams={
"param_1": 1,
"param_2": 1,
"param_3": 2,
"param_4": 1,
"param_5": 3,
"param_6": 2,
"param_7": 3,
"param_8": 3,
},
)
def test_with_aliased_join(self):
people = self.tables.people
values = (
Values(
column("bookcase_id", Integer),
column("bookcase_owner_id", Integer),
)
.data([(1, 1), (2, 1), (3, 2), (3, 3)])
.alias("bookcases")
)
stmt = select(people, values).select_from(
people.join(
values, values.c.bookcase_owner_id == people.c.people_id
)
)
self.assert_compile(
stmt,
"SELECT people.people_id, people.age, people.name, "
"bookcases.bookcase_id, bookcases.bookcase_owner_id FROM people "
"JOIN (VALUES (:param_1, :param_2), (:param_3, :param_4), "
"(:param_5, :param_6), (:param_7, :param_8)) AS bookcases "
"(bookcase_id, bookcase_owner_id) "
"ON people.people_id = bookcases.bookcase_owner_id",
checkparams={
"param_1": 1,
"param_2": 1,
"param_3": 2,
"param_4": 1,
"param_5": 3,
"param_6": 2,
"param_7": 3,
"param_8": 3,
},
)
def test_with_standalone_aliased_join(self):
people = self.tables.people
values = Values(
column("bookcase_id", Integer),
column("bookcase_owner_id", Integer),
).data([(1, 1), (2, 1), (3, 2), (3, 3)])
values = alias(values, "bookcases")
stmt = select(people, values).select_from(
people.join(
values, values.c.bookcase_owner_id == people.c.people_id
)
)
self.assert_compile(
stmt,
"SELECT people.people_id, people.age, people.name, "
"bookcases.bookcase_id, bookcases.bookcase_owner_id FROM people "
"JOIN (VALUES (:param_1, :param_2), (:param_3, :param_4), "
"(:param_5, :param_6), (:param_7, :param_8)) AS bookcases "
"(bookcase_id, bookcase_owner_id) "
"ON people.people_id = bookcases.bookcase_owner_id",
checkparams={
"param_1": 1,
"param_2": 1,
"param_3": 2,
"param_4": 1,
"param_5": 3,
"param_6": 2,
"param_7": 3,
"param_8": 3,
},
)
def test_lateral(self):
people = self.tables.people
values = (
Values(
column("bookcase_id", Integer),
column("bookcase_owner_id", Integer),
name="bookcases",
)
.data([(1, 1), (2, 1), (3, 2), (3, 3)])
.lateral()
)
stmt = select(people, values).select_from(people.join(values, true()))
self.assert_compile(
stmt,
"SELECT people.people_id, people.age, people.name, "
"bookcases.bookcase_id, bookcases.bookcase_owner_id FROM people "
"JOIN LATERAL (VALUES (:param_1, :param_2), (:param_3, :param_4), "
"(:param_5, :param_6), (:param_7, :param_8)) AS bookcases "
"(bookcase_id, bookcase_owner_id) "
"ON true",
checkparams={
"param_1": 1,
"param_2": 1,
"param_3": 2,
"param_4": 1,
"param_5": 3,
"param_6": 2,
"param_7": 3,
"param_8": 3,
},
)
def test_from_linting_named(self):
people = self.tables.people
values = Values(
column("bookcase_id", Integer),
column("bookcase_owner_id", Integer),
name="bookcases",
).data([(1, 1), (2, 1), (3, 2), (3, 3)])
stmt = select(people, values)
with testing.expect_warnings(
r"SELECT statement has a cartesian product between FROM "
r'element\(s\) "(?:bookcases|people)" and '
r'FROM element "(?:people|bookcases)"'
):
stmt.compile(linting=FROM_LINTING)
def test_from_linting_unnamed(self):
people = self.tables.people
values = Values(
column("bookcase_id", Integer),
column("bookcase_owner_id", Integer),
).data([(1, 1), (2, 1), (3, 2), (3, 3)])
stmt = select(people, values)
with testing.expect_warnings(
r"SELECT statement has a cartesian product between FROM "
r'element\(s\) "(?:\(unnamed VALUES element\)|people)" and '
r'FROM element "(?:people|\(unnamed VALUES element\))"'
):
stmt.compile(linting=FROM_LINTING)
|
