Classe « SelectBase »

Informations générales

Héritage

            builtins.object
                Visitable
                    CompilerElement
            builtins.object
                Visitable
            builtins.object
                HasTraverseInternals
                    ExternallyTraversible
            builtins.object
                HasTraverseInternals
                    HasCopyInternals
            builtins.object
                HasMemoized
            builtins.object
                HasCacheKey
                    MemoizedHasCacheKey
    builtins.object
        Visitable
    builtins.object
        HasTraverseInternals
            ExternallyTraversible
                SupportsAnnotations
                    SupportsWrappingAnnotations
                        ClauseElement
                            DQLDMLClauseElement
                    builtins.object
                        SQLRole
                            ReturnsRowsRole
                                ReturnsRows
                                    Selectable
                builtins.object
                    Visitable
                builtins.object
                    HasTraverseInternals
                        ExternallyTraversible
                            SupportsAnnotations
                                SupportsWrappingAnnotations
                                    SupportsCloneAnnotations
        builtins.object
            Visitable
                CompilerElement
        builtins.object
            Visitable
        builtins.object
            HasTraverseInternals
                ExternallyTraversible
        builtins.object
            HasTraverseInternals
                HasCopyInternals
        builtins.object
            HasMemoized
        builtins.object
            HasCacheKey
                MemoizedHasCacheKey
builtins.object
    Visitable
builtins.object
    HasTraverseInternals
        ExternallyTraversible
            SupportsAnnotations
                SupportsWrappingAnnotations
                    ClauseElement
                        DQLDMLClauseElement
                builtins.object
                    SQLRole
                        ReturnsRowsRole
                            ReturnsRows
                                SelectsRows
                    builtins.object
                        SQLRole
                            ReturnsRowsRole
                                HasCTERole
                                    HasCTE
                            builtins.object
                                SQLRole
                                    InElementRole
                            builtins.object
                                SQLRole
                            builtins.object
                                AllowsLambdaRole
                                    CompoundElementRole
                            builtins.object
                                SQLRole
                                    DMLSelectRole
                        builtins.object
                            SQLRole
                                ReturnsRowsRole
                        builtins.object
                            SQLRole
                                StatementRole
                                    SelectStatementRole
                                        SelectBase

Définition

class SelectBase(SelectStatementRole, DMLSelectRole, CompoundElementRole, InElementRole, HasCTE, SupportsCloneAnnotations, Selectable):

help(SelectBase)

Base class for SELECT statements.


This includes :class:`_expression.Select`,
:class:`_expression.CompoundSelect` and
:class:`_expression.TextualSelect`.

Constructeur(s)

Signature du constructeur	Description
__init__(self, /, args, *kwargs)	Initialize self. See help(type(self)) for accurate signature. _{[extrait de __init__.__doc__]}

Liste des attributs statiques

Nom de l'attribut	Valeur
allows_lambda	True
description	<sqlalchemy.util.langhelpers._memoized_property object at 0x0000020D9F723AD0>
inherit_cache	None
is_clause_element	True
is_dml	False
is_select	True
is_selectable	True
selected_columns	<sqlalchemy.util.langhelpers._non_memoized_property object at 0x0000020D9F937D70>
stringify_dialect	default
supports_execution	False
uses_inspection	False

Liste des propriétés

Nom de la propriété	Description
c
columns
entity_namespace
exported_columns	A :class:`_expression.ColumnCollection` _{[extrait de exported_columns.__doc__]}
selectable

Liste des opérateurs

Opérateurs hérités de la classe ClauseElement

__invert__

Liste des opérateurs

Opérateurs hérités de la classe object

__eq__, __ge__, __gt__, __le__, __lt__, __ne__

Liste des méthodes

Toutes les méthodes Méthodes d'instance Méthodes statiques

Signature de la méthode	Description
alias(self, name: 'Optional[str]' = None, flat: 'bool' = False) -> 'Subquery'	Return a named subquery against this _{[extrait de alias.__doc__]}
as_scalar(self) -> 'ScalarSelect[Any]'
exists(self) -> 'Exists'	Return an :class:`_sql.Exists` representation of this selectable, _{[extrait de exists.__doc__]}
get_label_style(self) -> 'SelectLabelStyle'
label(self, name: 'Optional[str]') -> 'Label[Any]'	Return a 'scalar' representation of this selectable, embedded as a _{[extrait de label.__doc__]}
lateral(self, name: 'Optional[str]' = None) -> 'LateralFromClause'	Return a LATERAL alias of this :class:`_expression.Selectable`. _{[extrait de lateral.__doc__]}
scalar_subquery(self) -> 'ScalarSelect[Any]'	Return a 'scalar' representation of this selectable, which can be _{[extrait de scalar_subquery.__doc__]}
select(self, arg: 'Any', *kw: 'Any') -> 'Select[Any]'
set_label_style(self, style: 'SelectLabelStyle') -> 'Self'	Return a new selectable with the specified label style. _{[extrait de set_label_style.__doc__]}
subquery(self, name: 'Optional[str]' = None) -> 'Subquery'	Return a subquery of this :class:`_expression.SelectBase`. _{[extrait de subquery.__doc__]}