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This sets the _generated_cache_key_traversal attribute once called so should only be called once per class. t inherit_cachet _cache_key_traversalt _generated_cache_key_traversalR s� Class %s will not make use of SQL compilation caching as it does not set the 'inherit_cache' attribute to ``True``. This can have significant performance implications including some performance degradations in comparison to prior SQLAlchemy versions. Set this attribute to True if this object can make use of the cache key generated by the superclass. Alternatively, this attribute may be set to False which will disable this warning.t codet cprfN( t __dict__R t Nonet boolt getattrR t AttributeErrort NO_CACHER* t _cache_key_traversal_visitorR" t _hierarchy_supports_cachingR t warnt __name__( R% R( t inheritR) ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyR h s8 s sqlalchemy.sql.elementsc C s� t | � } | j } | | k r/ | | | f St | j � | | <} | j d 7_ y | j d } Wn t k r� | j � } n X| t k r� t | t <d S| | f } x| | t � D]\ } } } | d k r� | t k r| j } | t k rt | t <d S| | | f 7} q�| t k rht j j } t | | j � rU| j | � } n | | | f 7} q�| t k r�| | | j | | � f 7} q�| r�| t k r�| | | f 7} q�| t k r�| | | d | d r�| d j | | � n d f 7} q�| t j k r<| j r&| | j 7} q�| | j | � 7} q�| t j k si| t j k si| t j k r�| | t g | D] } | j | | � ^ qy� f 7} q�| | | | | | | � 7} q�q� q� W| S( sB return an optional cache key. The cache key is a tuple which can contain any series of objects that are hashable and also identifies this object uniquely within the presence of a larger SQL expression or statement, for the purposes of caching the resulting query. The cache key should be based on the SQL compiled structure that would ultimately be produced. That is, two structures that are composed in exactly the same way should produce the same cache key; any difference in the structures that would affect the SQL string or the type handlers should result in a different cache key. If a structure cannot produce a useful cache key, the NO_CACHE symbol should be added to the anon_map and the method should return None. i R* t compile_state_plugint plugin_subjectN(! t idt __class__t strt indexR- t KeyErrorR R2 t TrueR. R3 t STATIC_CACHE_KEYt _static_cache_keyt ANON_NAMER t preloadedt sql_elementst isinstancet _anonymous_labelt apply_mapt CALL_GEN_CACHE_KEYt _gen_cache_keyt CACHE_IN_PLACEt PROPAGATE_ATTRSR t dp_annotations_keyt! _gen_static_annotations_cache_keyt _annotations_cache_keyt _gen_annotations_cache_keyt dp_clauseelement_listt dp_clauseelement_tuplet dp_memoized_select_entitiest tuple( t selft anon_mapt bindparamst idselfR% t id_t dispatchert resultt attrnamet objt metht sckt elementst elem( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyRI � sr , c C sB g } t � } | j | | � } t | k r1 d St | | � Sd S( sp return a cache key. The cache key is a tuple which can contain any series of objects that are hashable and also identifies this object uniquely within the presence of a larger SQL expression or statement, for the purposes of caching the resulting query. The cache key should be based on the SQL compiled structure that would ultimately be produced. That is, two structures that are composed in exactly the same way should produce the same cache key; any difference in the structures that would affect the SQL string or the type handlers should result in a different cache key. The cache key returned by this method is an instance of :class:`.CacheKey`, which consists of a tuple representing the cache key, as well as a list of :class:`.BindParameter` objects which are extracted from the expression. While two expressions that produce identical cache key tuples will themselves generate identical SQL strings, the list of :class:`.BindParameter` objects indicates the bound values which may have different values in each one; these bound parameters must be consulted in order to execute the statement with the correct parameters. a :class:`_expression.ClauseElement` structure that does not implement a :meth:`._gen_cache_key` method and does not implement a :attr:`.traverse_internals` attribute will not be cacheable; when such an element is embedded into a larger structure, this method will return None, indicating no cache key is available. N( RU RI R2 R. t CacheKey( RT RV t _anon_mapt key( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt _generate_cache_key s c C sB g } t � } | j | | � } t | k r1 d St | | � Sd S( N( RU RI R2 R. Ra ( R% R\ RV Rb Rc ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt _generate_cache_key_for_objectG s N( ( R6 t __module__t __doc__R2 R) R? t _is_has_cache_keyR4 R. R( t __slots__t classmethodR R t preload_moduleRI Rd Re ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyR' 9 s =y )t MemoizedHasCacheKeyc B s e Z e j d � � Z RS( c C s t j | � S( N( R' Rd ( RT ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyRd T s ( R6 Rf R t memoized_instancemethodRd ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyRl S s Ra Rc RV c B sn e Z d Z d � Z d � Z d � Z d � Z e d � � Z d � Z d � Z d � Z d � Z d � Z RS( s� The key used to identify a SQL statement construct in the SQL compilation cache. .. seealso:: :ref:`sql_caching` c C s d S( s7 CacheKey itself is not hashable - hash the .key portionN( R. ( RT ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt __hash__c s c s� | j | k r) t | � | | j <} n | | j } | j sd t � f d � t � � D� � } n t � f d � | j D� � } t | | f � S( s� Generate an "offline string" form of this :class:`.CacheKey` The "offline string" is basically the string SQL for the statement plus a repr of the bound parameter values in series. Whereas the :class:`.CacheKey` object is dependent on in-memory identities in order to work as a cache key, the "offline" version is suitable for a cache that will work for other processes as well. The given ``statement_cache`` is a dictionary-like object where the string form of the statement itself will be cached. This dictionary should be in a longer lived scope in order to reduce the time spent stringifying statements. c 3 s | ] } � | Vq d S( N( ( t .0Rc ( t parameters( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pys <genexpr>~ s c 3 s' | ] } � j | j | j � Vq d S( N( R Rc t value( Ro t bindparam( Rp ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pys <genexpr>� s ( Rc R< RV RS t sortedt repr( RT t statement_cachet statementRp t sql_strt param_tuple( ( Rp sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt to_offline_stringh s % c C s t | j | j k � S( N( R/ Rc ( RT t other( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt __eq__� s c C s | j | j k S( N( Rc ( RT Rz ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt __ne__� s c C s+ t | g � } t | g � } | j | � S( N( Ra t _diff( R% t leftt rightt ck1t ck2( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt _diff_tuples� s c c s | j } | j } g } d } x� t r| | } } x" | D] } | | } | | } q; Wx� t t j | | � � D]� \ } \ } } | | k r� qr n | | k rr t | t � r� t | t � r� | j | � Pq� d d j d � | D� � | | | f Vqr qr W| j d � } Pq! 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| ] } | j � � � Vq d S( N( RI ( Ro R` ( RU RV ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pys <genexpr>$ s N( RS ( Ro t tup_elem( RU RV ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pys <genexpr># s ( ( RS ( RT R[ R\ R� RU RV ( ( RU RV sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt visit_has_cache_key_tuples s c s- | s d S| t � � f d � | D� � f S( Nc 3 s! | ] } | j � � � Vq d S( N( RI ( Ro R` ( RU RV ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pys <genexpr>2 s ( ( RS ( RT R[ R\ R� RU RV ( ( RU RV sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt visit_has_cache_key_list+ s c s- | s d S| t � � f d � | D� � f S( Nc 3 s* | ] } | j r | j � � � Vq d S( N( Rh RI ( Ro R` ( RU RV ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pys <genexpr>= s ( ( RS ( RT R[ R\ R� RU RV ( ( RU RV sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt visit_executable_options5 s c C s2 | j | g | D] } t | � ^ q | | | � S( N( R� R ( RT R[ R\ R� RU RV t o( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt visit_inspectable_listC s c C s | j | | | | | � S( N( R� ( RT R[ R\ R� RU RV ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt visit_clauseelement_tuplesJ s c C s9 | s d S| t g | D] } | j | | � ^ q � f S( N( ( RS RI ( RT R[ R\ R� RU RV R` ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt visit_fromclause_ordered_setQ s c C sE | s d Sg | D] } | j | | � ^ q } | t t | � � f S( N( ( RI RS Rs ( RT R[ R\ R� RU RV R` t cache_keys( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt! visit_clauseelement_unordered_set[ s %c C s | | j f S( N( t name( RT R[ R\ R� RU RV ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt visit_named_ddl_elementj s c C sE | s d S| t g | D]$ \ } } | j | | � | f ^ q � f S( N( ( RS RI ( RT R[ R\ R� RU RV t clauset strval( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt visit_prefix_sequenceo s c s, d | k � t � � � f d � | D� � S( Nt legacyc 3 s� | ]� \ } } } } � r0 t | t � r0 | n | j � � � � rZ t | t � rZ | n! | d k rx | j � � � n d | d k r� | j � � � n d t g t | � D] } | | | f ^ q� � f Vq d S( N( RE R< RI R. RS Rs ( Ro t targett onclauset from_t flagsRc ( RU RV t is_legacy( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pys <genexpr>� s ( RS ( RT R[ R\ R� RU RV ( ( RU RV R� sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt visit_setup_join_tuple s c C sT | s d S| t g | j � D]- \ \ } } } | j | | � | | f ^ q � f S( N( ( RS t itemsRI ( RT R[ R\ R� RU RV R� t dialect_namet text( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt visit_table_hint_list� s c C s3 | t g t | � D] } | | | f ^ q � f S( N( RS Rs ( RT R[ R\ R� RU RV Rc ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt visit_plain_dict� s c s& | t � f d � t � � D� � f S( Nc 3 sL | ]B } | t g t � | � D] } | � | | f ^ q � f Vq d S( N( RS Rs ( Ro R� Rc ( R\ ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pys <genexpr>� s ( RS Rs ( RT R[ R\ R� RU RV ( ( R\ sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt visit_dialect_options� s c s, | t � � � f d � t � � D� � f S( Nc 3 s+ | ]! } | � | j � � � f Vq d S( N( RI ( Ro Rc ( RU RV R\ ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pys <genexpr>� s ( RS Rs ( RT R[ R\ R� RU RV ( ( RU RV R\ sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt visit_string_clauseelement_dict� s c sF | t � � f d � g t | � D] } | | | f ^ q" D� � f S( Nc 3 sB | ]8 \ } } | t | t � r3 | j � � � n | f Vq d S( N( RE R' RI ( Ro Rc Rq ( RU RV ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pys <genexpr>� s ( RS Rs ( RT R[ R\ R� RU RV Rc ( ( RU RV sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt visit_string_multi_dict� s c s& | t � � f d � | j D� � f S( Nc 3 s' | ] \ } } | j � � � Vq d S( N( RI ( Ro R� t col( RU RV ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pys <genexpr>� s ( RS t _collection( RT R[ R\ R� RU RV ( ( RU RV sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt, visit_fromclause_canonical_column_collection� s c C s t | t <d S( N( ( R? R2 ( RT R[ R\ R� RU RV ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt visit_unknown_structure� s c s# | t � � f d � | D� � f S( Nc 3 sN | ]D \ } } t | d � r0 | j � � � n | | j � � � f Vq d S( t __clause_element__N( R RI ( Ro Rc Rq ( RU RV ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pys <genexpr>� s ( RS ( RT R[ R\ R� RU RV ( ( RU RV sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt visit_dml_ordered_values� s c s� t r, | t � � � f d � � D� � f Sd � � D� } | rP t � t <d S| j � � } | t � � � f d � t | � D� � f Sd S( Nc 3 sL | ]B } t | d � r* | j � � � n | � | j � � � f Vq d S( R� N( R RI ( Ro R� ( RU RV R\ ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pys <genexpr> s c S s% h | ] } t | d � r | � q S( R� ( R ( Ro R� ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pys <setcomp> s c 3 s+ | ]! } | � | j � � � f Vq d S( N( RI ( Ro R� ( RU RV R\ ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pys <genexpr> s ( ( R RS R? R2 t symmetric_differenceRs ( RT R[ R\ R� RU RV t expr_valuest str_values( ( RU RV R\ sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/traversals.pyt visit_dml_values� s c C s t | t <d S( N( ( R? 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