python学习
This commit is contained in:
263
venv/Lib/site-packages/sqlalchemy/sql/expression.py
Normal file
263
venv/Lib/site-packages/sqlalchemy/sql/expression.py
Normal file
@@ -0,0 +1,263 @@
|
||||
# sql/expression.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
|
||||
|
||||
"""Defines the public namespace for SQL expression constructs.
|
||||
|
||||
Prior to version 0.9, this module contained all of "elements", "dml",
|
||||
"default_comparator" and "selectable". The module was broken up
|
||||
and most "factory" functions were moved to be grouped with their associated
|
||||
class.
|
||||
|
||||
"""
|
||||
|
||||
__all__ = [
|
||||
"Alias",
|
||||
"any_",
|
||||
"all_",
|
||||
"ClauseElement",
|
||||
"ColumnCollection",
|
||||
"ColumnElement",
|
||||
"CompoundSelect",
|
||||
"Delete",
|
||||
"FromClause",
|
||||
"Insert",
|
||||
"Join",
|
||||
"Lateral",
|
||||
"Select",
|
||||
"Selectable",
|
||||
"TableClause",
|
||||
"Update",
|
||||
"alias",
|
||||
"and_",
|
||||
"asc",
|
||||
"between",
|
||||
"bindparam",
|
||||
"case",
|
||||
"cast",
|
||||
"column",
|
||||
"cte",
|
||||
"delete",
|
||||
"desc",
|
||||
"distinct",
|
||||
"except_",
|
||||
"except_all",
|
||||
"exists",
|
||||
"extract",
|
||||
"func",
|
||||
"modifier",
|
||||
"collate",
|
||||
"insert",
|
||||
"intersect",
|
||||
"intersect_all",
|
||||
"join",
|
||||
"label",
|
||||
"lateral",
|
||||
"literal",
|
||||
"literal_column",
|
||||
"not_",
|
||||
"null",
|
||||
"nullsfirst",
|
||||
"nullslast",
|
||||
"or_",
|
||||
"outparam",
|
||||
"outerjoin",
|
||||
"over",
|
||||
"select",
|
||||
"subquery",
|
||||
"table",
|
||||
"text",
|
||||
"tuple_",
|
||||
"type_coerce",
|
||||
"quoted_name",
|
||||
"union",
|
||||
"union_all",
|
||||
"update",
|
||||
"within_group",
|
||||
"TableSample",
|
||||
"tablesample",
|
||||
]
|
||||
|
||||
|
||||
from .base import _from_objects # noqa
|
||||
from .base import ColumnCollection # noqa
|
||||
from .base import Executable # noqa
|
||||
from .base import Generative # noqa
|
||||
from .base import PARSE_AUTOCOMMIT # noqa
|
||||
from .dml import Delete # noqa
|
||||
from .dml import Insert # noqa
|
||||
from .dml import Update # noqa
|
||||
from .dml import UpdateBase # noqa
|
||||
from .dml import ValuesBase # noqa
|
||||
from .elements import _clause_element_as_expr # noqa
|
||||
from .elements import _clone # noqa
|
||||
from .elements import _cloned_difference # noqa
|
||||
from .elements import _cloned_intersection # noqa
|
||||
from .elements import _column_as_key # noqa
|
||||
from .elements import _corresponding_column_or_error # noqa
|
||||
from .elements import _expression_literal_as_text # noqa
|
||||
from .elements import _is_column # noqa
|
||||
from .elements import _labeled # noqa
|
||||
from .elements import _literal_as_binds # noqa
|
||||
from .elements import _literal_as_column # noqa
|
||||
from .elements import _literal_as_label_reference # noqa
|
||||
from .elements import _literal_as_text # noqa
|
||||
from .elements import _only_column_elements # noqa
|
||||
from .elements import _select_iterables # noqa
|
||||
from .elements import _string_or_unprintable # noqa
|
||||
from .elements import _truncated_label # noqa
|
||||
from .elements import between # noqa
|
||||
from .elements import BinaryExpression # noqa
|
||||
from .elements import BindParameter # noqa
|
||||
from .elements import BooleanClauseList # noqa
|
||||
from .elements import Case # noqa
|
||||
from .elements import Cast # noqa
|
||||
from .elements import ClauseElement # noqa
|
||||
from .elements import ClauseList # noqa
|
||||
from .elements import collate # noqa
|
||||
from .elements import CollectionAggregate # noqa
|
||||
from .elements import ColumnClause # noqa
|
||||
from .elements import ColumnElement # noqa
|
||||
from .elements import Extract # noqa
|
||||
from .elements import False_ # noqa
|
||||
from .elements import FunctionFilter # noqa
|
||||
from .elements import Grouping # noqa
|
||||
from .elements import Label # noqa
|
||||
from .elements import literal # noqa
|
||||
from .elements import literal_column # noqa
|
||||
from .elements import not_ # noqa
|
||||
from .elements import Null # noqa
|
||||
from .elements import outparam # noqa
|
||||
from .elements import Over # noqa
|
||||
from .elements import quoted_name # noqa
|
||||
from .elements import ReleaseSavepointClause # noqa
|
||||
from .elements import RollbackToSavepointClause # noqa
|
||||
from .elements import SavepointClause # noqa
|
||||
from .elements import TextClause # noqa
|
||||
from .elements import True_ # noqa
|
||||
from .elements import Tuple # noqa
|
||||
from .elements import TypeClause # noqa
|
||||
from .elements import TypeCoerce # noqa
|
||||
from .elements import UnaryExpression # noqa
|
||||
from .elements import WithinGroup # noqa
|
||||
from .functions import func # noqa
|
||||
from .functions import Function # noqa
|
||||
from .functions import FunctionElement # noqa
|
||||
from .functions import modifier # noqa
|
||||
from .selectable import _interpret_as_from # noqa
|
||||
from .selectable import Alias # noqa
|
||||
from .selectable import CompoundSelect # noqa
|
||||
from .selectable import CTE # noqa
|
||||
from .selectable import Exists # noqa
|
||||
from .selectable import FromClause # noqa
|
||||
from .selectable import FromGrouping # noqa
|
||||
from .selectable import GenerativeSelect # noqa
|
||||
from .selectable import HasCTE # noqa
|
||||
from .selectable import HasPrefixes # noqa
|
||||
from .selectable import HasSuffixes # noqa
|
||||
from .selectable import Join # noqa
|
||||
from .selectable import Lateral # noqa
|
||||
from .selectable import ScalarSelect # noqa
|
||||
from .selectable import Select # noqa
|
||||
from .selectable import Selectable # noqa
|
||||
from .selectable import SelectBase # noqa
|
||||
from .selectable import subquery # noqa
|
||||
from .selectable import TableClause # noqa
|
||||
from .selectable import TableSample # noqa
|
||||
from .selectable import TextAsFrom # noqa
|
||||
from .visitors import Visitable # noqa
|
||||
from ..util.langhelpers import public_factory # noqa
|
||||
|
||||
|
||||
# factory functions - these pull class-bound constructors and classmethods
|
||||
# from SQL elements and selectables into public functions. This allows
|
||||
# the functions to be available in the sqlalchemy.sql.* namespace and
|
||||
# to be auto-cross-documenting from the function to the class itself.
|
||||
|
||||
all_ = public_factory(CollectionAggregate._create_all, ".expression.all_")
|
||||
any_ = public_factory(CollectionAggregate._create_any, ".expression.any_")
|
||||
and_ = public_factory(BooleanClauseList.and_, ".expression.and_")
|
||||
alias = public_factory(Alias._factory, ".expression.alias")
|
||||
tablesample = public_factory(TableSample._factory, ".expression.tablesample")
|
||||
lateral = public_factory(Lateral._factory, ".expression.lateral")
|
||||
or_ = public_factory(BooleanClauseList.or_, ".expression.or_")
|
||||
bindparam = public_factory(BindParameter, ".expression.bindparam")
|
||||
select = public_factory(Select, ".expression.select")
|
||||
text = public_factory(TextClause._create_text, ".expression.text")
|
||||
table = public_factory(TableClause, ".expression.table")
|
||||
column = public_factory(ColumnClause, ".expression.column")
|
||||
over = public_factory(Over, ".expression.over")
|
||||
within_group = public_factory(WithinGroup, ".expression.within_group")
|
||||
label = public_factory(Label, ".expression.label")
|
||||
case = public_factory(Case, ".expression.case")
|
||||
cast = public_factory(Cast, ".expression.cast")
|
||||
cte = public_factory(CTE._factory, ".expression.cte")
|
||||
extract = public_factory(Extract, ".exp # noqaression.extract")
|
||||
tuple_ = public_factory(Tuple, ".expression.tuple_")
|
||||
except_ = public_factory(CompoundSelect._create_except, ".expression.except_")
|
||||
except_all = public_factory(
|
||||
CompoundSelect._create_except_all, ".expression.except_all"
|
||||
)
|
||||
intersect = public_factory(
|
||||
CompoundSelect._create_intersect, ".expression.intersect"
|
||||
)
|
||||
intersect_all = public_factory(
|
||||
CompoundSelect._create_intersect_all, ".expression.intersect_all"
|
||||
)
|
||||
union = public_factory(CompoundSelect._create_union, ".expression.union")
|
||||
union_all = public_factory(
|
||||
CompoundSelect._create_union_all, ".expression.union_all"
|
||||
)
|
||||
exists = public_factory(Exists, ".expression.exists")
|
||||
nullsfirst = public_factory(
|
||||
UnaryExpression._create_nullsfirst, ".expression.nullsfirst"
|
||||
)
|
||||
nullslast = public_factory(
|
||||
UnaryExpression._create_nullslast, ".expression.nullslast"
|
||||
)
|
||||
asc = public_factory(UnaryExpression._create_asc, ".expression.asc")
|
||||
desc = public_factory(UnaryExpression._create_desc, ".expression.desc")
|
||||
distinct = public_factory(
|
||||
UnaryExpression._create_distinct, ".expression.distinct"
|
||||
)
|
||||
type_coerce = public_factory(TypeCoerce, ".expression.type_coerce")
|
||||
true = public_factory(True_._instance, ".expression.true")
|
||||
false = public_factory(False_._instance, ".expression.false")
|
||||
null = public_factory(Null._instance, ".expression.null")
|
||||
join = public_factory(Join._create_join, ".expression.join")
|
||||
outerjoin = public_factory(Join._create_outerjoin, ".expression.outerjoin")
|
||||
insert = public_factory(Insert, ".expression.insert")
|
||||
update = public_factory(Update, ".expression.update")
|
||||
delete = public_factory(Delete, ".expression.delete")
|
||||
funcfilter = public_factory(FunctionFilter, ".expression.funcfilter")
|
||||
|
||||
|
||||
# internal functions still being called from tests and the ORM,
|
||||
# these might be better off in some other namespace
|
||||
|
||||
|
||||
# old names for compatibility
|
||||
_Executable = Executable
|
||||
_BindParamClause = BindParameter
|
||||
_Label = Label
|
||||
_SelectBase = SelectBase
|
||||
_BinaryExpression = BinaryExpression
|
||||
_Cast = Cast
|
||||
_Null = Null
|
||||
_False = False_
|
||||
_True = True_
|
||||
_TextClause = TextClause
|
||||
_UnaryExpression = UnaryExpression
|
||||
_Case = Case
|
||||
_Tuple = Tuple
|
||||
_Over = Over
|
||||
_Generative = Generative
|
||||
_TypeClause = TypeClause
|
||||
_Extract = Extract
|
||||
_Exists = Exists
|
||||
_Grouping = Grouping
|
||||
_FromGrouping = FromGrouping
|
||||
_ScalarSelect = ScalarSelect
|
||||
Reference in New Issue
Block a user