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authorcyfraeviolae <cyfraeviolae>2024-04-03 03:10:44 -0400
committercyfraeviolae <cyfraeviolae>2024-04-03 03:10:44 -0400
commit6d7ba58f880be618ade07f8ea080fe8c4bf8a896 (patch)
treeb1c931051ffcebd2bd9d61d98d6233ffa289bbce /venv/lib/python3.11/site-packages/sqlalchemy/sql/default_comparator.py
parent4f884c9abc32990b4061a1bb6997b4b37e58ea0b (diff)
venv
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+# sql/default_comparator.py
+# Copyright (C) 2005-2024 the SQLAlchemy authors and contributors
+# <see AUTHORS file>
+#
+# This module is part of SQLAlchemy and is released under
+# the MIT License: https://www.opensource.org/licenses/mit-license.php
+
+"""Default implementation of SQL comparison operations.
+"""
+
+from __future__ import annotations
+
+import typing
+from typing import Any
+from typing import Callable
+from typing import Dict
+from typing import NoReturn
+from typing import Optional
+from typing import Tuple
+from typing import Type
+from typing import Union
+
+from . import coercions
+from . import operators
+from . import roles
+from . import type_api
+from .elements import and_
+from .elements import BinaryExpression
+from .elements import ClauseElement
+from .elements import CollationClause
+from .elements import CollectionAggregate
+from .elements import ExpressionClauseList
+from .elements import False_
+from .elements import Null
+from .elements import OperatorExpression
+from .elements import or_
+from .elements import True_
+from .elements import UnaryExpression
+from .operators import OperatorType
+from .. import exc
+from .. import util
+
+_T = typing.TypeVar("_T", bound=Any)
+
+if typing.TYPE_CHECKING:
+ from .elements import ColumnElement
+ from .operators import custom_op
+ from .type_api import TypeEngine
+
+
+def _boolean_compare(
+ expr: ColumnElement[Any],
+ op: OperatorType,
+ obj: Any,
+ *,
+ negate_op: Optional[OperatorType] = None,
+ reverse: bool = False,
+ _python_is_types: Tuple[Type[Any], ...] = (type(None), bool),
+ result_type: Optional[TypeEngine[bool]] = None,
+ **kwargs: Any,
+) -> OperatorExpression[bool]:
+ if result_type is None:
+ result_type = type_api.BOOLEANTYPE
+
+ if isinstance(obj, _python_is_types + (Null, True_, False_)):
+ # allow x ==/!= True/False to be treated as a literal.
+ # this comes out to "== / != true/false" or "1/0" if those
+ # constants aren't supported and works on all platforms
+ if op in (operators.eq, operators.ne) and isinstance(
+ obj, (bool, True_, False_)
+ ):
+ return OperatorExpression._construct_for_op(
+ expr,
+ coercions.expect(roles.ConstExprRole, obj),
+ op,
+ type_=result_type,
+ negate=negate_op,
+ modifiers=kwargs,
+ )
+ elif op in (
+ operators.is_distinct_from,
+ operators.is_not_distinct_from,
+ ):
+ return OperatorExpression._construct_for_op(
+ expr,
+ coercions.expect(roles.ConstExprRole, obj),
+ op,
+ type_=result_type,
+ negate=negate_op,
+ modifiers=kwargs,
+ )
+ elif expr._is_collection_aggregate:
+ obj = coercions.expect(
+ roles.ConstExprRole, element=obj, operator=op, expr=expr
+ )
+ else:
+ # all other None uses IS, IS NOT
+ if op in (operators.eq, operators.is_):
+ return OperatorExpression._construct_for_op(
+ expr,
+ coercions.expect(roles.ConstExprRole, obj),
+ operators.is_,
+ negate=operators.is_not,
+ type_=result_type,
+ )
+ elif op in (operators.ne, operators.is_not):
+ return OperatorExpression._construct_for_op(
+ expr,
+ coercions.expect(roles.ConstExprRole, obj),
+ operators.is_not,
+ negate=operators.is_,
+ type_=result_type,
+ )
+ else:
+ raise exc.ArgumentError(
+ "Only '=', '!=', 'is_()', 'is_not()', "
+ "'is_distinct_from()', 'is_not_distinct_from()' "
+ "operators can be used with None/True/False"
+ )
+ else:
+ obj = coercions.expect(
+ roles.BinaryElementRole, element=obj, operator=op, expr=expr
+ )
+
+ if reverse:
+ return OperatorExpression._construct_for_op(
+ obj,
+ expr,
+ op,
+ type_=result_type,
+ negate=negate_op,
+ modifiers=kwargs,
+ )
+ else:
+ return OperatorExpression._construct_for_op(
+ expr,
+ obj,
+ op,
+ type_=result_type,
+ negate=negate_op,
+ modifiers=kwargs,
+ )
+
+
+def _custom_op_operate(
+ expr: ColumnElement[Any],
+ op: custom_op[Any],
+ obj: Any,
+ reverse: bool = False,
+ result_type: Optional[TypeEngine[Any]] = None,
+ **kw: Any,
+) -> ColumnElement[Any]:
+ if result_type is None:
+ if op.return_type:
+ result_type = op.return_type
+ elif op.is_comparison:
+ result_type = type_api.BOOLEANTYPE
+
+ return _binary_operate(
+ expr, op, obj, reverse=reverse, result_type=result_type, **kw
+ )
+
+
+def _binary_operate(
+ expr: ColumnElement[Any],
+ op: OperatorType,
+ obj: roles.BinaryElementRole[Any],
+ *,
+ reverse: bool = False,
+ result_type: Optional[TypeEngine[_T]] = None,
+ **kw: Any,
+) -> OperatorExpression[_T]:
+ coerced_obj = coercions.expect(
+ roles.BinaryElementRole, obj, expr=expr, operator=op
+ )
+
+ if reverse:
+ left, right = coerced_obj, expr
+ else:
+ left, right = expr, coerced_obj
+
+ if result_type is None:
+ op, result_type = left.comparator._adapt_expression(
+ op, right.comparator
+ )
+
+ return OperatorExpression._construct_for_op(
+ left, right, op, type_=result_type, modifiers=kw
+ )
+
+
+def _conjunction_operate(
+ expr: ColumnElement[Any], op: OperatorType, other: Any, **kw: Any
+) -> ColumnElement[Any]:
+ if op is operators.and_:
+ return and_(expr, other)
+ elif op is operators.or_:
+ return or_(expr, other)
+ else:
+ raise NotImplementedError()
+
+
+def _scalar(
+ expr: ColumnElement[Any],
+ op: OperatorType,
+ fn: Callable[[ColumnElement[Any]], ColumnElement[Any]],
+ **kw: Any,
+) -> ColumnElement[Any]:
+ return fn(expr)
+
+
+def _in_impl(
+ expr: ColumnElement[Any],
+ op: OperatorType,
+ seq_or_selectable: ClauseElement,
+ negate_op: OperatorType,
+ **kw: Any,
+) -> ColumnElement[Any]:
+ seq_or_selectable = coercions.expect(
+ roles.InElementRole, seq_or_selectable, expr=expr, operator=op
+ )
+ if "in_ops" in seq_or_selectable._annotations:
+ op, negate_op = seq_or_selectable._annotations["in_ops"]
+
+ return _boolean_compare(
+ expr, op, seq_or_selectable, negate_op=negate_op, **kw
+ )
+
+
+def _getitem_impl(
+ expr: ColumnElement[Any], op: OperatorType, other: Any, **kw: Any
+) -> ColumnElement[Any]:
+ if (
+ isinstance(expr.type, type_api.INDEXABLE)
+ or isinstance(expr.type, type_api.TypeDecorator)
+ and isinstance(expr.type.impl_instance, type_api.INDEXABLE)
+ ):
+ other = coercions.expect(
+ roles.BinaryElementRole, other, expr=expr, operator=op
+ )
+ return _binary_operate(expr, op, other, **kw)
+ else:
+ _unsupported_impl(expr, op, other, **kw)
+
+
+def _unsupported_impl(
+ expr: ColumnElement[Any], op: OperatorType, *arg: Any, **kw: Any
+) -> NoReturn:
+ raise NotImplementedError(
+ "Operator '%s' is not supported on this expression" % op.__name__
+ )
+
+
+def _inv_impl(
+ expr: ColumnElement[Any], op: OperatorType, **kw: Any
+) -> ColumnElement[Any]:
+ """See :meth:`.ColumnOperators.__inv__`."""
+
+ # undocumented element currently used by the ORM for
+ # relationship.contains()
+ if hasattr(expr, "negation_clause"):
+ return expr.negation_clause
+ else:
+ return expr._negate()
+
+
+def _neg_impl(
+ expr: ColumnElement[Any], op: OperatorType, **kw: Any
+) -> ColumnElement[Any]:
+ """See :meth:`.ColumnOperators.__neg__`."""
+ return UnaryExpression(expr, operator=operators.neg, type_=expr.type)
+
+
+def _bitwise_not_impl(
+ expr: ColumnElement[Any], op: OperatorType, **kw: Any
+) -> ColumnElement[Any]:
+ """See :meth:`.ColumnOperators.bitwise_not`."""
+
+ return UnaryExpression(
+ expr, operator=operators.bitwise_not_op, type_=expr.type
+ )
+
+
+def _match_impl(
+ expr: ColumnElement[Any], op: OperatorType, other: Any, **kw: Any
+) -> ColumnElement[Any]:
+ """See :meth:`.ColumnOperators.match`."""
+
+ return _boolean_compare(
+ expr,
+ operators.match_op,
+ coercions.expect(
+ roles.BinaryElementRole,
+ other,
+ expr=expr,
+ operator=operators.match_op,
+ ),
+ result_type=type_api.MATCHTYPE,
+ negate_op=(
+ operators.not_match_op
+ if op is operators.match_op
+ else operators.match_op
+ ),
+ **kw,
+ )
+
+
+def _distinct_impl(
+ expr: ColumnElement[Any], op: OperatorType, **kw: Any
+) -> ColumnElement[Any]:
+ """See :meth:`.ColumnOperators.distinct`."""
+ return UnaryExpression(
+ expr, operator=operators.distinct_op, type_=expr.type
+ )
+
+
+def _between_impl(
+ expr: ColumnElement[Any],
+ op: OperatorType,
+ cleft: Any,
+ cright: Any,
+ **kw: Any,
+) -> ColumnElement[Any]:
+ """See :meth:`.ColumnOperators.between`."""
+ return BinaryExpression(
+ expr,
+ ExpressionClauseList._construct_for_list(
+ operators.and_,
+ type_api.NULLTYPE,
+ coercions.expect(
+ roles.BinaryElementRole,
+ cleft,
+ expr=expr,
+ operator=operators.and_,
+ ),
+ coercions.expect(
+ roles.BinaryElementRole,
+ cright,
+ expr=expr,
+ operator=operators.and_,
+ ),
+ group=False,
+ ),
+ op,
+ negate=(
+ operators.not_between_op
+ if op is operators.between_op
+ else operators.between_op
+ ),
+ modifiers=kw,
+ )
+
+
+def _collate_impl(
+ expr: ColumnElement[str], op: OperatorType, collation: str, **kw: Any
+) -> ColumnElement[str]:
+ return CollationClause._create_collation_expression(expr, collation)
+
+
+def _regexp_match_impl(
+ expr: ColumnElement[str],
+ op: OperatorType,
+ pattern: Any,
+ flags: Optional[str],
+ **kw: Any,
+) -> ColumnElement[Any]:
+ return BinaryExpression(
+ expr,
+ coercions.expect(
+ roles.BinaryElementRole,
+ pattern,
+ expr=expr,
+ operator=operators.comma_op,
+ ),
+ op,
+ negate=operators.not_regexp_match_op,
+ modifiers={"flags": flags},
+ )
+
+
+def _regexp_replace_impl(
+ expr: ColumnElement[Any],
+ op: OperatorType,
+ pattern: Any,
+ replacement: Any,
+ flags: Optional[str],
+ **kw: Any,
+) -> ColumnElement[Any]:
+ return BinaryExpression(
+ expr,
+ ExpressionClauseList._construct_for_list(
+ operators.comma_op,
+ type_api.NULLTYPE,
+ coercions.expect(
+ roles.BinaryElementRole,
+ pattern,
+ expr=expr,
+ operator=operators.comma_op,
+ ),
+ coercions.expect(
+ roles.BinaryElementRole,
+ replacement,
+ expr=expr,
+ operator=operators.comma_op,
+ ),
+ group=False,
+ ),
+ op,
+ modifiers={"flags": flags},
+ )
+
+
+# a mapping of operators with the method they use, along with
+# additional keyword arguments to be passed
+operator_lookup: Dict[
+ str,
+ Tuple[
+ Callable[..., ColumnElement[Any]],
+ util.immutabledict[
+ str, Union[OperatorType, Callable[..., ColumnElement[Any]]]
+ ],
+ ],
+] = {
+ "and_": (_conjunction_operate, util.EMPTY_DICT),
+ "or_": (_conjunction_operate, util.EMPTY_DICT),
+ "inv": (_inv_impl, util.EMPTY_DICT),
+ "add": (_binary_operate, util.EMPTY_DICT),
+ "mul": (_binary_operate, util.EMPTY_DICT),
+ "sub": (_binary_operate, util.EMPTY_DICT),
+ "div": (_binary_operate, util.EMPTY_DICT),
+ "mod": (_binary_operate, util.EMPTY_DICT),
+ "bitwise_xor_op": (_binary_operate, util.EMPTY_DICT),
+ "bitwise_or_op": (_binary_operate, util.EMPTY_DICT),
+ "bitwise_and_op": (_binary_operate, util.EMPTY_DICT),
+ "bitwise_not_op": (_bitwise_not_impl, util.EMPTY_DICT),
+ "bitwise_lshift_op": (_binary_operate, util.EMPTY_DICT),
+ "bitwise_rshift_op": (_binary_operate, util.EMPTY_DICT),
+ "truediv": (_binary_operate, util.EMPTY_DICT),
+ "floordiv": (_binary_operate, util.EMPTY_DICT),
+ "custom_op": (_custom_op_operate, util.EMPTY_DICT),
+ "json_path_getitem_op": (_binary_operate, util.EMPTY_DICT),
+ "json_getitem_op": (_binary_operate, util.EMPTY_DICT),
+ "concat_op": (_binary_operate, util.EMPTY_DICT),
+ "any_op": (
+ _scalar,
+ util.immutabledict({"fn": CollectionAggregate._create_any}),
+ ),
+ "all_op": (
+ _scalar,
+ util.immutabledict({"fn": CollectionAggregate._create_all}),
+ ),
+ "lt": (_boolean_compare, util.immutabledict({"negate_op": operators.ge})),
+ "le": (_boolean_compare, util.immutabledict({"negate_op": operators.gt})),
+ "ne": (_boolean_compare, util.immutabledict({"negate_op": operators.eq})),
+ "gt": (_boolean_compare, util.immutabledict({"negate_op": operators.le})),
+ "ge": (_boolean_compare, util.immutabledict({"negate_op": operators.lt})),
+ "eq": (_boolean_compare, util.immutabledict({"negate_op": operators.ne})),
+ "is_distinct_from": (
+ _boolean_compare,
+ util.immutabledict({"negate_op": operators.is_not_distinct_from}),
+ ),
+ "is_not_distinct_from": (
+ _boolean_compare,
+ util.immutabledict({"negate_op": operators.is_distinct_from}),
+ ),
+ "like_op": (
+ _boolean_compare,
+ util.immutabledict({"negate_op": operators.not_like_op}),
+ ),
+ "ilike_op": (
+ _boolean_compare,
+ util.immutabledict({"negate_op": operators.not_ilike_op}),
+ ),
+ "not_like_op": (
+ _boolean_compare,
+ util.immutabledict({"negate_op": operators.like_op}),
+ ),
+ "not_ilike_op": (
+ _boolean_compare,
+ util.immutabledict({"negate_op": operators.ilike_op}),
+ ),
+ "contains_op": (
+ _boolean_compare,
+ util.immutabledict({"negate_op": operators.not_contains_op}),
+ ),
+ "icontains_op": (
+ _boolean_compare,
+ util.immutabledict({"negate_op": operators.not_icontains_op}),
+ ),
+ "startswith_op": (
+ _boolean_compare,
+ util.immutabledict({"negate_op": operators.not_startswith_op}),
+ ),
+ "istartswith_op": (
+ _boolean_compare,
+ util.immutabledict({"negate_op": operators.not_istartswith_op}),
+ ),
+ "endswith_op": (
+ _boolean_compare,
+ util.immutabledict({"negate_op": operators.not_endswith_op}),
+ ),
+ "iendswith_op": (
+ _boolean_compare,
+ util.immutabledict({"negate_op": operators.not_iendswith_op}),
+ ),
+ "desc_op": (
+ _scalar,
+ util.immutabledict({"fn": UnaryExpression._create_desc}),
+ ),
+ "asc_op": (
+ _scalar,
+ util.immutabledict({"fn": UnaryExpression._create_asc}),
+ ),
+ "nulls_first_op": (
+ _scalar,
+ util.immutabledict({"fn": UnaryExpression._create_nulls_first}),
+ ),
+ "nulls_last_op": (
+ _scalar,
+ util.immutabledict({"fn": UnaryExpression._create_nulls_last}),
+ ),
+ "in_op": (
+ _in_impl,
+ util.immutabledict({"negate_op": operators.not_in_op}),
+ ),
+ "not_in_op": (
+ _in_impl,
+ util.immutabledict({"negate_op": operators.in_op}),
+ ),
+ "is_": (
+ _boolean_compare,
+ util.immutabledict({"negate_op": operators.is_}),
+ ),
+ "is_not": (
+ _boolean_compare,
+ util.immutabledict({"negate_op": operators.is_not}),
+ ),
+ "collate": (_collate_impl, util.EMPTY_DICT),
+ "match_op": (_match_impl, util.EMPTY_DICT),
+ "not_match_op": (_match_impl, util.EMPTY_DICT),
+ "distinct_op": (_distinct_impl, util.EMPTY_DICT),
+ "between_op": (_between_impl, util.EMPTY_DICT),
+ "not_between_op": (_between_impl, util.EMPTY_DICT),
+ "neg": (_neg_impl, util.EMPTY_DICT),
+ "getitem": (_getitem_impl, util.EMPTY_DICT),
+ "lshift": (_unsupported_impl, util.EMPTY_DICT),
+ "rshift": (_unsupported_impl, util.EMPTY_DICT),
+ "contains": (_unsupported_impl, util.EMPTY_DICT),
+ "regexp_match_op": (_regexp_match_impl, util.EMPTY_DICT),
+ "not_regexp_match_op": (_regexp_match_impl, util.EMPTY_DICT),
+ "regexp_replace_op": (_regexp_replace_impl, util.EMPTY_DICT),
+}