),
)
+Boolean Support
+---------------
+
+.. versionadded:: 2.1
+
+Oracle Database 23ai introduced native support for the ``BOOLEAN`` datatype.
+The Oracle dialect automatically detects the database version and uses the
+native ``BOOLEAN`` type when available, or falls back to emulation using
+``SMALLINT`` on older Oracle versions.
+
+The standard :class:`_types.Boolean` type can be used in table definitions::
+
+ from sqlalchemy import Boolean, Column, Integer, Table, MetaData
+
+ metadata = MetaData()
+
+ my_table = Table(
+ "my_table",
+ metadata,
+ Column("id", Integer, primary_key=True),
+ Column("flag", Boolean),
+ )
+
+On Oracle 23ai and later, this will generate DDL using the native ``BOOLEAN`` type:
+
+.. code-block:: sql
+
+ CREATE TABLE my_table (
+ id INTEGER NOT NULL,
+ flag BOOLEAN,
+ PRIMARY KEY (id)
+ )
+
+On earlier Oracle versions, it will use ``SMALLINT`` for storage with appropriate
+constraints and conversions.
+
+The :class:`_types.Boolean` type is also available as ``BOOLEAN`` from the Oracle
+dialect for consistency with other type names::
+
+ from sqlalchemy.dialects.oracle import BOOLEAN
+
DateTime Compatibility
----------------------
from .types import BFILE
from .types import BINARY_DOUBLE
from .types import BINARY_FLOAT
+from .types import BOOLEAN
from .types import DATE
from .types import FLOAT
from .types import INTERVAL
"BINARY_DOUBLE": BINARY_DOUBLE,
"BINARY_FLOAT": BINARY_FLOAT,
"ROWID": ROWID,
+ "BOOLEAN": BOOLEAN,
"VECTOR": VECTOR,
}
return self.visit_NUMBER(type_, precision=19, **kw)
def visit_boolean(self, type_, **kw):
- return self.visit_SMALLINT(type_, **kw)
+ if self.dialect.supports_native_boolean:
+ return self.visit_BOOLEAN(type_, **kw)
+ else:
+ return self.visit_SMALLINT(type_, **kw)
def visit_RAW(self, type_, **kw):
if type_.length:
self.colspecs.pop(sqltypes.Interval)
self.use_ansi = False
+ self.supports_native_boolean = self.server_version_info >= (23,)
self.supports_identity_columns = self.server_version_info >= (12,)
self._supports_offset_fetch = (
self.enable_offset_fetch and self.server_version_info >= (12,)
from sqlalchemy import NCHAR
from sqlalchemy import Numeric
from sqlalchemy import NVARCHAR
+from sqlalchemy import schema
from sqlalchemy import select
from sqlalchemy import SmallInteger
from sqlalchemy import String
def test_interval_literal_processor(self, type_, expected):
self.assert_compile(type_, expected, literal_binds=True)
+ def test_compile_boolean_native(self):
+ dialect = oracle.OracleDialect()
+ dialect.supports_native_boolean = True
+
+ t = Table(
+ "t",
+ MetaData(),
+ Column("x", sqltypes.Boolean),
+ Column("y", oracle.BOOLEAN),
+ Column(
+ "z", sqltypes.Boolean().with_variant(oracle.BOOLEAN, "oracle")
+ ),
+ )
+
+ self.assert_compile(
+ schema.CreateTable(t),
+ "CREATE TABLE t (x BOOLEAN, y BOOLEAN, z BOOLEAN)",
+ dialect=dialect,
+ )
+
+ def test_compile_boolean_emulated(self):
+ dialect = oracle.OracleDialect()
+ dialect.supports_native_boolean = False
+
+ t = Table(
+ "t",
+ MetaData(),
+ Column("x", sqltypes.Boolean),
+ Column("y", oracle.BOOLEAN),
+ Column(
+ "z", sqltypes.Boolean().with_variant(oracle.BOOLEAN, "oracle")
+ ),
+ )
+
+ self.assert_compile(
+ schema.CreateTable(t),
+ "CREATE TABLE t (x SMALLINT, y BOOLEAN, z BOOLEAN)",
+ dialect=dialect,
+ )
+
class TypesTest(fixtures.TestBase):
__only_on__ = "oracle"
eq_(result[1].indices, array.array("I", [1, 2]))
eq_(result[1].values, array.array("f", [23.25, 221.625]))
+ @testing.only_on("oracle>=23.0")
+ def test_boolean_native(self, metadata, connection):
+ """Test native BOOLEAN type on Oracle 23c+"""
+ t = Table(
+ "boolean_test",
+ metadata,
+ Column("id", Integer, primary_key=True),
+ Column("x", sqltypes.Boolean),
+ Column("y", oracle.BOOLEAN),
+ Column(
+ "z", sqltypes.Boolean().with_variant(oracle.BOOLEAN, "oracle")
+ ),
+ )
+ t.create(connection)
+
+ # Insert test data
+ connection.execute(
+ t.insert(),
+ [
+ dict(id=1, x=True, y=True, z=True),
+ dict(id=2, x=False, y=False, z=False),
+ dict(id=3, x=None, y=None, z=None),
+ ],
+ )
+
+ # Test SELECT
+ rows = connection.execute(t.select().order_by(t.c.id)).fetchall()
+
+ eq_(rows[0], (1, True, True, True))
+ eq_(rows[1], (2, False, False, False))
+ eq_(rows[2], (3, None, None, None))
+
+ # Test WHERE clause with boolean
+ result = connection.execute(t.select().where(t.c.x == True)).fetchall()
+ eq_(len(result), 1)
+ eq_(result[0][0], 1)
+
+ result = connection.execute(
+ t.select().where(t.c.x == False)
+ ).fetchall()
+ eq_(len(result), 1)
+ eq_(result[0][0], 2)
+
+ def test_boolean_emulated(self, metadata, connection):
+ """Test emulated BOOLEAN type behavior
+
+ This test forces emulated mode by setting
+ supports_native_boolean=False, even on Oracle 23c+. This verifies
+ that the emulation layer still works correctly when native BOOLEAN
+ is available but not used.
+
+ Note: We only test sqltypes.Boolean here, not oracle.BOOLEAN or
+ with_variant(), because those explicitly request native BOOLEAN type
+ regardless of the supports_native_boolean setting.
+ """
+ # Temporarily force emulated boolean mode
+ original_supports_native = connection.dialect.supports_native_boolean
+ connection.dialect.supports_native_boolean = False
+
+ try:
+ t = Table(
+ "boolean_emulated_test",
+ metadata,
+ Column("id", Integer, primary_key=True),
+ Column("data", sqltypes.Boolean),
+ )
+ t.create(connection)
+
+ # Insert test data
+ connection.execute(
+ t.insert(),
+ [
+ dict(id=1, data=True),
+ dict(id=2, data=False),
+ dict(id=3, data=None),
+ ],
+ )
+
+ # Test SELECT - emulated boolean returns True/False
+ rows = connection.execute(t.select().order_by(t.c.id)).fetchall()
+
+ eq_(rows[0], (1, True))
+ eq_(rows[1], (2, False))
+ eq_(rows[2], (3, None))
+
+ # Test WHERE clause with boolean
+ result = connection.execute(
+ t.select().where(t.c.data == True)
+ ).fetchall()
+ eq_(len(result), 1)
+ eq_(result[0][0], 1)
+
+ result = connection.execute(
+ t.select().where(t.c.data == False)
+ ).fetchall()
+ eq_(len(result), 1)
+ eq_(result[0][0], 2)
+ finally:
+ # Restore original setting
+ connection.dialect.supports_native_boolean = (
+ original_supports_native
+ )
+
class LOBFetchTest(fixtures.TablesTest):
__only_on__ = "oracle"
projects / thirdparty / sqlalchemy / sqlalchemy.git / commitdiff
