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# sql/expression.py
# Copyright (C) 2005-2018 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",
"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 .visitors import Visitable
from .functions import func, modifier, FunctionElement, Function
from ..util.langhelpers import public_factory
from .elements import (
ClauseElement,
ColumnElement,
BindParameter,
CollectionAggregate,
UnaryExpression,
BooleanClauseList,
Label,
Cast,
Case,
ColumnClause,
TextClause,
Over,
Null,
True_,
False_,
BinaryExpression,
Tuple,
TypeClause,
Extract,
Grouping,
WithinGroup,
not_,
quoted_name,
collate,
literal_column,
between,
literal,
outparam,
TypeCoerce,
ClauseList,
FunctionFilter,
)
from .elements import (
SavepointClause,
RollbackToSavepointClause,
ReleaseSavepointClause,
)
from .base import ColumnCollection, Generative, Executable, PARSE_AUTOCOMMIT
from .selectable import (
Alias,
Join,
Select,
Selectable,
TableClause,
CompoundSelect,
CTE,
FromClause,
FromGrouping,
Lateral,
SelectBase,
alias,
GenerativeSelect,
subquery,
HasCTE,
HasPrefixes,
HasSuffixes,
lateral,
Exists,
ScalarSelect,
TextAsFrom,
TableSample,
tablesample,
)
from .dml import Insert, Update, Delete, UpdateBase, ValuesBase
# 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_")
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")
extract = public_factory(Extract, ".expression.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
from .base import _from_objects
from .elements import (
_literal_as_text,
_clause_element_as_expr,
_is_column,
_labeled,
_only_column_elements,
_string_or_unprintable,
_truncated_label,
_clone,
_cloned_difference,
_cloned_intersection,
_column_as_key,
_literal_as_binds,
_select_iterables,
_corresponding_column_or_error,
_literal_as_label_reference,
_expression_literal_as_text,
)
from .selectable import _interpret_as_from
# 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
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