mirror of
https://github.com/sqlalchemy/sqlalchemy.git
synced 2026-05-25 01:52:03 -04:00
Mike Bayer
c0e6ebd70b
The ``literal_processor`` for the :class:`.Unicode` and :class:`.UnicodeText` datatypes now render an ``N`` character in front of the literal string expression as required by SQL Server for Unicode string values rendered in SQL expressions. Note that this adds full unicode characters to the standard test suite, which means we also need to bump MySQL provisioning up to utf8mb4. Modern installs do not seem to be reproducing the 1271 issue locally, if it reproduces in CI it would be better for us to skip those ORM-centric tests for MySQL. Also remove unused _StringType from SQL Server dialect Fixes: #4442 Change-Id: Id55817b3e8a2d81ddc8b7b27f85e3f1dcc1cea7e
967 lines
26 KiB
Python
967 lines
26 KiB
Python
# testing/requirements.py
|
|
# Copyright (C) 2005-2019 the SQLAlchemy authors and contributors
|
|
# <see AUTHORS file>
|
|
#
|
|
# This module is part of SQLAlchemy and is released under
|
|
# the MIT License: http://www.opensource.org/licenses/mit-license.php
|
|
|
|
"""Global database feature support policy.
|
|
|
|
Provides decorators to mark tests requiring specific feature support from the
|
|
target database.
|
|
|
|
External dialect test suites should subclass SuiteRequirements
|
|
to provide specific inclusion/exclusions.
|
|
|
|
"""
|
|
|
|
import sys
|
|
|
|
from . import exclusions
|
|
from .. import util
|
|
|
|
|
|
class Requirements(object):
|
|
pass
|
|
|
|
|
|
class SuiteRequirements(Requirements):
|
|
@property
|
|
def create_table(self):
|
|
"""target platform can emit basic CreateTable DDL."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def drop_table(self):
|
|
"""target platform can emit basic DropTable DDL."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def foreign_keys(self):
|
|
"""Target database must support foreign keys."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def on_update_cascade(self):
|
|
""""target database must support ON UPDATE..CASCADE behavior in
|
|
foreign keys."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def non_updating_cascade(self):
|
|
"""target database must *not* support ON UPDATE..CASCADE behavior in
|
|
foreign keys."""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def deferrable_fks(self):
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def on_update_or_deferrable_fks(self):
|
|
# TODO: exclusions should be composable,
|
|
# somehow only_if([x, y]) isn't working here, negation/conjunctions
|
|
# getting confused.
|
|
return exclusions.only_if(
|
|
lambda: self.on_update_cascade.enabled
|
|
or self.deferrable_fks.enabled
|
|
)
|
|
|
|
@property
|
|
def self_referential_foreign_keys(self):
|
|
"""Target database must support self-referential foreign keys."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def foreign_key_ddl(self):
|
|
"""Target database must support the DDL phrases for FOREIGN KEY."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def named_constraints(self):
|
|
"""target database must support names for constraints."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def subqueries(self):
|
|
"""Target database must support subqueries."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def offset(self):
|
|
"""target database can render OFFSET, or an equivalent, in a
|
|
SELECT.
|
|
"""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def bound_limit_offset(self):
|
|
"""target database can render LIMIT and/or OFFSET using a bound
|
|
parameter
|
|
"""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def parens_in_union_contained_select_w_limit_offset(self):
|
|
"""Target database must support parenthesized SELECT in UNION
|
|
when LIMIT/OFFSET is specifically present.
|
|
|
|
E.g. (SELECT ...) UNION (SELECT ..)
|
|
|
|
This is known to fail on SQLite.
|
|
|
|
"""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def parens_in_union_contained_select_wo_limit_offset(self):
|
|
"""Target database must support parenthesized SELECT in UNION
|
|
when OFFSET/LIMIT is specifically not present.
|
|
|
|
E.g. (SELECT ... LIMIT ..) UNION (SELECT .. OFFSET ..)
|
|
|
|
This is known to fail on SQLite. It also fails on Oracle
|
|
because without LIMIT/OFFSET, there is currently no step that
|
|
creates an additional subquery.
|
|
|
|
"""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def boolean_col_expressions(self):
|
|
"""Target database must support boolean expressions as columns"""
|
|
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def nullsordering(self):
|
|
"""Target backends that support nulls ordering."""
|
|
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def standalone_binds(self):
|
|
"""target database/driver supports bound parameters as column expressions
|
|
without being in the context of a typed column.
|
|
|
|
"""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def intersect(self):
|
|
"""Target database must support INTERSECT or equivalent."""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def except_(self):
|
|
"""Target database must support EXCEPT or equivalent (i.e. MINUS)."""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def window_functions(self):
|
|
"""Target database must support window functions."""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def ctes(self):
|
|
"""Target database supports CTEs"""
|
|
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def ctes_with_update_delete(self):
|
|
"""target database supports CTES that ride on top of a normal UPDATE
|
|
or DELETE statement which refers to the CTE in a correlated subquery.
|
|
|
|
"""
|
|
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def ctes_on_dml(self):
|
|
"""target database supports CTES which consist of INSERT, UPDATE
|
|
or DELETE *within* the CTE, e.g. WITH x AS (UPDATE....)"""
|
|
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def autoincrement_insert(self):
|
|
"""target platform generates new surrogate integer primary key values
|
|
when insert() is executed, excluding the pk column."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def fetch_rows_post_commit(self):
|
|
"""target platform will allow cursor.fetchone() to proceed after a
|
|
COMMIT.
|
|
|
|
Typically this refers to an INSERT statement with RETURNING which
|
|
is invoked within "autocommit". If the row can be returned
|
|
after the autocommit, then this rule can be open.
|
|
|
|
"""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def group_by_complex_expression(self):
|
|
"""target platform supports SQL expressions in GROUP BY
|
|
|
|
e.g.
|
|
|
|
SELECT x + y AS somelabel FROM table GROUP BY x + y
|
|
|
|
"""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def sane_rowcount(self):
|
|
return exclusions.skip_if(
|
|
lambda config: not config.db.dialect.supports_sane_rowcount,
|
|
"driver doesn't support 'sane' rowcount",
|
|
)
|
|
|
|
@property
|
|
def sane_multi_rowcount(self):
|
|
return exclusions.fails_if(
|
|
lambda config: not config.db.dialect.supports_sane_multi_rowcount,
|
|
"driver %(driver)s %(doesnt_support)s 'sane' multi row count",
|
|
)
|
|
|
|
@property
|
|
def sane_rowcount_w_returning(self):
|
|
return exclusions.fails_if(
|
|
lambda config: not (
|
|
config.db.dialect.supports_sane_rowcount_returning
|
|
),
|
|
"driver doesn't support 'sane' rowcount when returning is on",
|
|
)
|
|
|
|
@property
|
|
def empty_inserts(self):
|
|
"""target platform supports INSERT with no values, i.e.
|
|
INSERT DEFAULT VALUES or equivalent."""
|
|
|
|
return exclusions.only_if(
|
|
lambda config: config.db.dialect.supports_empty_insert
|
|
or config.db.dialect.supports_default_values,
|
|
"empty inserts not supported",
|
|
)
|
|
|
|
@property
|
|
def insert_from_select(self):
|
|
"""target platform supports INSERT from a SELECT."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def returning(self):
|
|
"""target platform supports RETURNING."""
|
|
|
|
return exclusions.only_if(
|
|
lambda config: config.db.dialect.implicit_returning,
|
|
"%(database)s %(does_support)s 'returning'",
|
|
)
|
|
|
|
@property
|
|
def tuple_in(self):
|
|
"""Target platform supports the syntax
|
|
"(x, y) IN ((x1, y1), (x2, y2), ...)"
|
|
"""
|
|
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def duplicate_names_in_cursor_description(self):
|
|
"""target platform supports a SELECT statement that has
|
|
the same name repeated more than once in the columns list."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def denormalized_names(self):
|
|
"""Target database must have 'denormalized', i.e.
|
|
UPPERCASE as case insensitive names."""
|
|
|
|
return exclusions.skip_if(
|
|
lambda config: not config.db.dialect.requires_name_normalize,
|
|
"Backend does not require denormalized names.",
|
|
)
|
|
|
|
@property
|
|
def multivalues_inserts(self):
|
|
"""target database must support multiple VALUES clauses in an
|
|
INSERT statement."""
|
|
|
|
return exclusions.skip_if(
|
|
lambda config: not config.db.dialect.supports_multivalues_insert,
|
|
"Backend does not support multirow inserts.",
|
|
)
|
|
|
|
@property
|
|
def implements_get_lastrowid(self):
|
|
""""target dialect implements the executioncontext.get_lastrowid()
|
|
method without reliance on RETURNING.
|
|
|
|
"""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def emulated_lastrowid(self):
|
|
""""target dialect retrieves cursor.lastrowid, or fetches
|
|
from a database-side function after an insert() construct executes,
|
|
within the get_lastrowid() method.
|
|
|
|
Only dialects that "pre-execute", or need RETURNING to get last
|
|
inserted id, would return closed/fail/skip for this.
|
|
|
|
"""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def dbapi_lastrowid(self):
|
|
""""target platform includes a 'lastrowid' accessor on the DBAPI
|
|
cursor object.
|
|
|
|
"""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def views(self):
|
|
"""Target database must support VIEWs."""
|
|
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def schemas(self):
|
|
"""Target database must support external schemas, and have one
|
|
named 'test_schema'."""
|
|
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def server_side_cursors(self):
|
|
"""Target dialect must support server side cursors."""
|
|
|
|
return exclusions.only_if(
|
|
[lambda config: config.db.dialect.supports_server_side_cursors],
|
|
"no server side cursors support",
|
|
)
|
|
|
|
@property
|
|
def sequences(self):
|
|
"""Target database must support SEQUENCEs."""
|
|
|
|
return exclusions.only_if(
|
|
[lambda config: config.db.dialect.supports_sequences],
|
|
"no sequence support",
|
|
)
|
|
|
|
@property
|
|
def sequences_optional(self):
|
|
"""Target database supports sequences, but also optionally
|
|
as a means of generating new PK values."""
|
|
|
|
return exclusions.only_if(
|
|
[
|
|
lambda config: config.db.dialect.supports_sequences
|
|
and config.db.dialect.sequences_optional
|
|
],
|
|
"no sequence support, or sequences not optional",
|
|
)
|
|
|
|
@property
|
|
def reflects_pk_names(self):
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def table_reflection(self):
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def comment_reflection(self):
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def view_column_reflection(self):
|
|
"""target database must support retrieval of the columns in a view,
|
|
similarly to how a table is inspected.
|
|
|
|
This does not include the full CREATE VIEW definition.
|
|
|
|
"""
|
|
return self.views
|
|
|
|
@property
|
|
def view_reflection(self):
|
|
"""target database must support inspection of the full CREATE VIEW definition.
|
|
"""
|
|
return self.views
|
|
|
|
@property
|
|
def schema_reflection(self):
|
|
return self.schemas
|
|
|
|
@property
|
|
def primary_key_constraint_reflection(self):
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def foreign_key_constraint_reflection(self):
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def foreign_key_constraint_option_reflection_ondelete(self):
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def foreign_key_constraint_option_reflection_onupdate(self):
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def temp_table_reflection(self):
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def temp_table_names(self):
|
|
"""target dialect supports listing of temporary table names"""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def temporary_tables(self):
|
|
"""target database supports temporary tables"""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def temporary_views(self):
|
|
"""target database supports temporary views"""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def index_reflection(self):
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def indexes_with_expressions(self):
|
|
"""target database supports CREATE INDEX against SQL expressions."""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def unique_constraint_reflection(self):
|
|
"""target dialect supports reflection of unique constraints"""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def check_constraint_reflection(self):
|
|
"""target dialect supports reflection of check constraints"""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def duplicate_key_raises_integrity_error(self):
|
|
"""target dialect raises IntegrityError when reporting an INSERT
|
|
with a primary key violation. (hint: it should)
|
|
|
|
"""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def unbounded_varchar(self):
|
|
"""Target database must support VARCHAR with no length"""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def unicode_data(self):
|
|
"""Target database/dialect must support Python unicode objects with
|
|
non-ASCII characters represented, delivered as bound parameters
|
|
as well as in result rows.
|
|
|
|
"""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def unicode_ddl(self):
|
|
"""Target driver must support some degree of non-ascii symbol
|
|
names.
|
|
"""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def datetime_literals(self):
|
|
"""target dialect supports rendering of a date, time, or datetime as a
|
|
literal string, e.g. via the TypeEngine.literal_processor() method.
|
|
|
|
"""
|
|
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def datetime(self):
|
|
"""target dialect supports representation of Python
|
|
datetime.datetime() objects."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def datetime_microseconds(self):
|
|
"""target dialect supports representation of Python
|
|
datetime.datetime() with microsecond objects."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def timestamp_microseconds(self):
|
|
"""target dialect supports representation of Python
|
|
datetime.datetime() with microsecond objects but only
|
|
if TIMESTAMP is used."""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def datetime_historic(self):
|
|
"""target dialect supports representation of Python
|
|
datetime.datetime() objects with historic (pre 1970) values."""
|
|
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def date(self):
|
|
"""target dialect supports representation of Python
|
|
datetime.date() objects."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def date_coerces_from_datetime(self):
|
|
"""target dialect accepts a datetime object as the target
|
|
of a date column."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def date_historic(self):
|
|
"""target dialect supports representation of Python
|
|
datetime.datetime() objects with historic (pre 1970) values."""
|
|
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def time(self):
|
|
"""target dialect supports representation of Python
|
|
datetime.time() objects."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def time_microseconds(self):
|
|
"""target dialect supports representation of Python
|
|
datetime.time() with microsecond objects."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def binary_comparisons(self):
|
|
"""target database/driver can allow BLOB/BINARY fields to be compared
|
|
against a bound parameter value.
|
|
"""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def binary_literals(self):
|
|
"""target backend supports simple binary literals, e.g. an
|
|
expression like::
|
|
|
|
SELECT CAST('foo' AS BINARY)
|
|
|
|
Where ``BINARY`` is the type emitted from :class:`.LargeBinary`,
|
|
e.g. it could be ``BLOB`` or similar.
|
|
|
|
Basically fails on Oracle.
|
|
|
|
"""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def autocommit(self):
|
|
"""target dialect supports 'AUTOCOMMIT' as an isolation_level"""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def json_type(self):
|
|
"""target platform implements a native JSON type."""
|
|
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def json_array_indexes(self):
|
|
""""target platform supports numeric array indexes
|
|
within a JSON structure"""
|
|
|
|
return self.json_type
|
|
|
|
@property
|
|
def precision_numerics_general(self):
|
|
"""target backend has general support for moderately high-precision
|
|
numerics."""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def precision_numerics_enotation_small(self):
|
|
"""target backend supports Decimal() objects using E notation
|
|
to represent very small values."""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def precision_numerics_enotation_large(self):
|
|
"""target backend supports Decimal() objects using E notation
|
|
to represent very large values."""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def precision_numerics_many_significant_digits(self):
|
|
"""target backend supports values with many digits on both sides,
|
|
such as 319438950232418390.273596, 87673.594069654243
|
|
|
|
"""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def implicit_decimal_binds(self):
|
|
"""target backend will return a selected Decimal as a Decimal, not
|
|
a string.
|
|
|
|
e.g.::
|
|
|
|
expr = decimal.Decimal("15.7563")
|
|
|
|
value = e.scalar(
|
|
select([literal(expr)])
|
|
)
|
|
|
|
assert value == expr
|
|
|
|
See :ticket:`4036`
|
|
|
|
"""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def nested_aggregates(self):
|
|
"""target database can select an aggregate from a subquery that's
|
|
also using an aggregate
|
|
|
|
"""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def recursive_fk_cascade(self):
|
|
"""target database must support ON DELETE CASCADE on a self-referential
|
|
foreign key
|
|
|
|
"""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def precision_numerics_retains_significant_digits(self):
|
|
"""A precision numeric type will return empty significant digits,
|
|
i.e. a value such as 10.000 will come back in Decimal form with
|
|
the .000 maintained."""
|
|
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def precision_generic_float_type(self):
|
|
"""target backend will return native floating point numbers with at
|
|
least seven decimal places when using the generic Float type.
|
|
|
|
"""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def floats_to_four_decimals(self):
|
|
"""target backend can return a floating-point number with four
|
|
significant digits (such as 15.7563) accurately
|
|
(i.e. without FP inaccuracies, such as 15.75629997253418).
|
|
|
|
"""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def fetch_null_from_numeric(self):
|
|
"""target backend doesn't crash when you try to select a NUMERIC
|
|
value that has a value of NULL.
|
|
|
|
Added to support Pyodbc bug #351.
|
|
"""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def text_type(self):
|
|
"""Target database must support an unbounded Text() "
|
|
"type such as TEXT or CLOB"""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def empty_strings_varchar(self):
|
|
"""target database can persist/return an empty string with a
|
|
varchar.
|
|
|
|
"""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def empty_strings_text(self):
|
|
"""target database can persist/return an empty string with an
|
|
unbounded text."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def expressions_against_unbounded_text(self):
|
|
"""target database supports use of an unbounded textual field in a
|
|
WHERE clause."""
|
|
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def selectone(self):
|
|
"""target driver must support the literal statement 'select 1'"""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def savepoints(self):
|
|
"""Target database must support savepoints."""
|
|
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def two_phase_transactions(self):
|
|
"""Target database must support two-phase transactions."""
|
|
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def update_from(self):
|
|
"""Target must support UPDATE..FROM syntax"""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def delete_from(self):
|
|
"""Target must support DELETE FROM..FROM or DELETE..USING syntax"""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def update_where_target_in_subquery(self):
|
|
"""Target must support UPDATE (or DELETE) where the same table is
|
|
present in a subquery in the WHERE clause.
|
|
|
|
This is an ANSI-standard syntax that apparently MySQL can't handle,
|
|
such as::
|
|
|
|
UPDATE documents SET flag=1 WHERE documents.title IN
|
|
(SELECT max(documents.title) AS title
|
|
FROM documents GROUP BY documents.user_id
|
|
)
|
|
|
|
"""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def mod_operator_as_percent_sign(self):
|
|
"""target database must use a plain percent '%' as the 'modulus'
|
|
operator."""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def percent_schema_names(self):
|
|
"""target backend supports weird identifiers with percent signs
|
|
in them, e.g. 'some % column'.
|
|
|
|
this is a very weird use case but often has problems because of
|
|
DBAPIs that use python formatting. It's not a critical use
|
|
case either.
|
|
|
|
"""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def order_by_label_with_expression(self):
|
|
"""target backend supports ORDER BY a column label within an
|
|
expression.
|
|
|
|
Basically this::
|
|
|
|
select data as foo from test order by foo || 'bar'
|
|
|
|
Lots of databases including PostgreSQL don't support this,
|
|
so this is off by default.
|
|
|
|
"""
|
|
return exclusions.closed()
|
|
|
|
@property
|
|
def order_by_collation(self):
|
|
def check(config):
|
|
try:
|
|
self.get_order_by_collation(config)
|
|
return False
|
|
except NotImplementedError:
|
|
return True
|
|
|
|
return exclusions.skip_if(check)
|
|
|
|
def get_order_by_collation(self, config):
|
|
raise NotImplementedError()
|
|
|
|
@property
|
|
def unicode_connections(self):
|
|
"""Target driver must support non-ASCII characters being passed at
|
|
all.
|
|
"""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def graceful_disconnects(self):
|
|
"""Target driver must raise a DBAPI-level exception, such as
|
|
InterfaceError, when the underlying connection has been closed
|
|
and the execute() method is called.
|
|
"""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def skip_mysql_on_windows(self):
|
|
"""Catchall for a large variety of MySQL on Windows failures"""
|
|
return exclusions.open()
|
|
|
|
@property
|
|
def ad_hoc_engines(self):
|
|
"""Test environment must allow ad-hoc engine/connection creation.
|
|
|
|
DBs that scale poorly for many connections, even when closed, i.e.
|
|
Oracle, may use the "--low-connections" option which flags this
|
|
requirement as not present.
|
|
|
|
"""
|
|
return exclusions.skip_if(
|
|
lambda config: config.options.low_connections
|
|
)
|
|
|
|
@property
|
|
def timing_intensive(self):
|
|
return exclusions.requires_tag("timing_intensive")
|
|
|
|
@property
|
|
def memory_intensive(self):
|
|
return exclusions.requires_tag("memory_intensive")
|
|
|
|
@property
|
|
def threading_with_mock(self):
|
|
"""Mark tests that use threading and mock at the same time - stability
|
|
issues have been observed with coverage + python 3.3
|
|
|
|
"""
|
|
return exclusions.skip_if(
|
|
lambda config: util.py3k and config.options.has_coverage,
|
|
"Stability issues with coverage + py3k",
|
|
)
|
|
|
|
@property
|
|
def python2(self):
|
|
return exclusions.skip_if(
|
|
lambda: sys.version_info >= (3,),
|
|
"Python version 2.xx is required.",
|
|
)
|
|
|
|
@property
|
|
def python3(self):
|
|
return exclusions.skip_if(
|
|
lambda: sys.version_info < (3,), "Python version 3.xx is required."
|
|
)
|
|
|
|
@property
|
|
def cpython(self):
|
|
return exclusions.only_if(
|
|
lambda: util.cpython, "cPython interpreter needed"
|
|
)
|
|
|
|
@property
|
|
def non_broken_pickle(self):
|
|
from sqlalchemy.util import pickle
|
|
|
|
return exclusions.only_if(
|
|
lambda: not util.pypy
|
|
and pickle.__name__ == "cPickle"
|
|
or sys.version_info >= (3, 2),
|
|
"Needs cPickle+cPython or newer Python 3 pickle",
|
|
)
|
|
|
|
@property
|
|
def predictable_gc(self):
|
|
"""target platform must remove all cycles unconditionally when
|
|
gc.collect() is called, as well as clean out unreferenced subclasses.
|
|
|
|
"""
|
|
return self.cpython
|
|
|
|
@property
|
|
def no_coverage(self):
|
|
"""Test should be skipped if coverage is enabled.
|
|
|
|
This is to block tests that exercise libraries that seem to be
|
|
sensitive to coverage, such as PostgreSQL notice logging.
|
|
|
|
"""
|
|
return exclusions.skip_if(
|
|
lambda config: config.options.has_coverage,
|
|
"Issues observed when coverage is enabled",
|
|
)
|
|
|
|
def _has_mysql_on_windows(self, config):
|
|
return False
|
|
|
|
def _has_mysql_fully_case_sensitive(self, config):
|
|
return False
|
|
|
|
@property
|
|
def sqlite(self):
|
|
return exclusions.skip_if(lambda: not self._has_sqlite())
|
|
|
|
@property
|
|
def cextensions(self):
|
|
return exclusions.skip_if(
|
|
lambda: not self._has_cextensions(), "C extensions not installed"
|
|
)
|
|
|
|
def _has_sqlite(self):
|
|
from sqlalchemy import create_engine
|
|
|
|
try:
|
|
create_engine("sqlite://")
|
|
return True
|
|
except ImportError:
|
|
return False
|
|
|
|
def _has_cextensions(self):
|
|
try:
|
|
from sqlalchemy import cresultproxy, cprocessors # noqa
|
|
|
|
return True
|
|
except ImportError:
|
|
return False
|