U
    d!                    @  s  d Z ddlmZ ddlZddlZddlZddlmZ ddlZddlm	Z	 ddlm
Z
 ddlmZ ddlmZ dd	lmZ dd
lmZ ddlmZ ddlmZ ddlmZ ddlmZ ddlmZ ddlmZ ddlmZ ddlmZ ddlmZ ddlZddlmZ ddlmZ ddlmZ ddlmZ ddlm Z  ddlm!Z! ddlm"Z" ddlm#Z# ddlm$Z$ ddl%m&Z& ddl%m'Z' d d!lm(Z( d d"lm)Z) d d#lm*Z* d d$lm+Z+ d d%l,m-Z- d d&l,m.Z. d d'l,m/Z/ d d(l,m0Z0 d d)l1m2Z2 d d*l3m4Z4 d d+l5m6Z6 d d,l5m7Z7 d d-l8m9Z9 d d.l:m;Z; d d/l<m=Z= d d0l<m>Z> ejr|dd1l?m@Z@ dd2lmAZA dd3lmBZB dd4lmCZC dd5lmDZD dd6lmEZE dd7lmFZF dd8lmGZG dd9lmHZH dd:lmIZI dd;lmJZJ dd<lKmLZL dd=lMmNZN d d>l(mOZO d d?l*mPZP d d@l*mQZQ d dAl,mRZR d dBl5mSZS d dCl5mTZT d dDl5mUZU d dElVmWZW d dFlVmXZX d dGl8mYZY d dHl:mZZZ d dIl[m\Z\ d dJl[m]Z] e^dKej_ej`B Zaebe \ZcZdZeZfZgG dLdM dMe"ZhG dNdO dOehZiG dPdQ dQe$Zjejeh_kdS )Ra  Default implementations of per-dialect sqlalchemy.engine classes.

These are semi-private implementation classes which are only of importance
to database dialect authors; dialects will usually use the classes here
as the base class for their own corresponding classes.

    )annotationsN)perf_counter)Any)Callable)cast)Dict)List)Mapping)MutableMapping)MutableSequence)Optional)Sequence)Set)Tuple)Type)TYPE_CHECKING)Union   )characteristics)cursor)
interfaces)
Connection)
CacheStats)DBAPICursor)Dialect)ExecuteStyle)ExecutionContext)
ObjectKind)ObjectScope   )event)exc)pool)util)compiler)dml)
expression)type_api)is_tuple_type)_NoArg)DDLCompiler)SQLCompiler)quoted_name)default_is_scalar)Final)Literal)
ModuleType)Engine)_CoreMultiExecuteParams)_CoreSingleExecuteParams)_DBAPICursorDescription)_DBAPIMultiExecuteParams)_ExecuteOptions)_MutableCoreSingleExecuteParams)_ParamStyle)DBAPIConnection)IsolationLevel)Row)URL)_ListenerFnType)Pool)PoolProxiedConnection)
Executable)Compiled)Linting)ResultColumnsEntry)DMLState)
UpdateBase)BindParameter)Column)_BindProcessorType)
TypeEnginez	\s*SELECTc                   @  s  e Zd ZU dZejZejZej	Z
ejZdZdZdZdZdZdZejjZdZded< dZded< dZeZdZdZdZdZ dZ!dZ"dZ#dZ$dZ%dZ&dZ'dZ(dZ)dZ*dZ+dZ,dZ-dZ.dZ/dZ0dZ1e23d	e45 iZ6e23e2j7e28d
e28d
e2j7e2j7e2j7e2j9dZ:ded< dZ;dZ<dZ=dZ>ded< dZ?ded	< dZ@ded< dZAded< dZBdZCi ZDded< dZEdZFdZGdZHdZIdZJdZKded< dZLded< dZMded< dZNdZOdZPdZQdZRdZSdZTded < dZUdZVdZWd!ZXe2jYd"d#d$dddddddeZj[de\ej]dfd%d&d'd(d)ddd*d)d+dd,d-d.d/Z^e_e2`d0d1d2d3 Zae_d4d5 ZbdZcdZde2jed6d7d8d9Zfe2jed:d; Zgd<d= Zhe2jed>d? Zie2jed@dA Zje_dBdC Zke_dDdE ZlemdFdGdHdIdJZndFdGdHdKdLZoemdMdN ZpdOd7dPdQZqdRdS ZrdTdU ZsdVdW ZtdXdY ZudZd[ Zvdd\d]Zwd^d_d,dd`dadbZxdcdd Zydedf Zzdgdh Z{diddjdkdldmZ|d^ddjdndodpZ}dqdr Z~dsdt Zdudv Zdwdx Zdydz Zd{d| Zd}d~ Ze2jedd ZdddddZdddddZdd Zdd Zdd Zdd Zdd ZdddZdddZdddZdd Ze2jdd Zdd Zdd Zdd Zdd Zdd Zdd Zdd Zdd Zdd Zdd Zdd Zdd Zdd Zdd Zdd ZdS )DefaultDialectz!Default implementation of DialectTFNzOptional[Set[Any]]include_set_input_sizesexclude_set_input_sizesr   isolation_leveldebug)pool_timeoutZechoZ	echo_poolZpool_recycleZ	pool_sizeZmax_overflowfutureMapping[str, Any]engine_config_typesdefaulti'  zOptional[int]#_user_defined_max_identifier_lengthzOptional[str]max_index_name_lengthmax_constraint_name_lengthz<MutableMapping[Type[TypeEngine[Any]], Type[TypeEngine[Any]]]colspecsnamedDEFAULTbooluse_insertmanyvalues!use_insertmanyvalues_wo_returningi  intinsertmanyvalues_page_sizei  default_schema_namezutf-8)1.4a  The :paramref:`_sa.create_engine.empty_in_strategy` keyword is deprecated, and no longer has any effect.  All IN expressions are now rendered using the "expanding parameter" strategy which renders a set of boundexpressions, or an "empty set" SELECT, at statement executiontime.)r`   zThe :paramref:`_sa.create_engine.server_side_cursors` parameter is deprecated and will be removed in a future release.  Please use the :paramref:`_engine.Connection.execution_options.stream_results` parameter.)Zempty_in_strategyserver_side_cursorszOptional[_ParamStyle]zOptional[IsolationLevel]zOptional[ModuleType]zLiteral[True]zOptional[bool]zUnion[_NoArg, int]rB   r   )
paramstylerM   dbapiimplicit_returningsupports_native_booleanmax_identifier_lengthlabel_lengthr^   r[   compiler_lintingra   kwargsc                 K  s4  |r | j std|  nd| _t| ddrBtdd tjj	| _
d| _d | _|| _|d k	rd|| _n| jd k	rz| jj| _n| j| _| jdk| _| | | _|| _t| dd }|d k	rtttj | j}n| j}||  | _| _|d k	r|| _|| _| jr| j| _|| _|
| _|	d k	r|	| _|t j!k	r0|| _"d S )	Nz/Dialect %s does not support server side cursorsTZuse_setinputsizesFzoThe dialect-level use_setinputsizes attribute is deprecated.  Please use bind_typing = BindTyping.SETINPUTSIZES2.0)ZqmarkformatnumericZnumeric_dollartype_compiler)#supports_server_side_cursorsr!   ArgumentErrorra   getattrr#   Zwarn_deprecatedr   
BindTypingZSETINPUTSIZESbind_typing
positionalZ_ischemarc   rb   default_paramstyleprepareridentifier_preparer_on_connect_isolation_levelr   r   r$   GenericTypeCompilerrm   type_compiler_clsZtype_compiler_instancere   rT   rf   rg   rh   r[   r)   NO_ARGr^   )selfrb   rM   rc   rd   re   rf   rg   r^   r[   rh   ra   ri   Zlegacy_tt_callableZtt_callable r|   =/tmp/pip-unpacked-wheel-wbr0uges/sqlalchemy/engine/default.py__init__  sV    $


zDefaultDialect.__init__rj   z]full_returning is deprecated, please use insert_returning, update_returning, delete_returningc                 C  s   | j o| jo| jS N)insert_returningupdate_returningdelete_returningr{   r|   r|   r}   full_returningh  s
    zDefaultDialect.full_returningc                 C  s   | j o| jo| jS r   )r   supports_multivalues_insertr[   r   r|   r|   r}   insert_executemany_returningu  s
    z+DefaultDialect.insert_executemany_returningr0   returnc                 C  s"   | j d krtd|  d| j S )NDialect z\ does not have a Python DBAPI established and cannot be used for actual database interaction)rc   r!   InvalidRequestErrorr   r|   r|   r}   loaded_dbapi  s
    

zDefaultDialect.loaded_dbapic                 C  s   | j tjjkS r   )rr   r   rq   ZRENDER_CASTSr   r|   r|   r}   _bind_typing_render_casts  s    z(DefaultDialect._bind_typing_render_castsc                 C  s$   t |ts tdtt|f d S )NzThe argument passed to Dialect.has_table() should be a %s, got %s. Additionally, the Dialect.has_table() method is for internal dialect use only; please use ``inspect(some_engine).has_table(<tablename>>)`` for public API use.)
isinstancer   r!   ro   type)r{   argr|   r|   r}   _ensure_has_table_connection  s    

z+DefaultDialect._ensure_has_table_connectionc                 C  s:   | j jdd }|d kr2tjd| j| jf dd t|S )Nsupports_statement_cachea  Dialect %s:%s will not make use of SQL compilation caching as it does not set the 'supports_statement_cache' attribute to ``True``.  This can have significant performance implications including some performance degradations in comparison to prior SQLAlchemy versions.  Dialect maintainers should seek to set this attribute to True after appropriate development and testing for SQLAlchemy 1.4 caching support.   Alternatively, this attribute may be set to False which will disable this warning.Zcprf)code)	__class____dict__getr#   warnnamedriverrZ   )r{   Zsscr|   r|   r}   _supports_statement_cache  s    	

z(DefaultDialect._supports_statement_cachec                 C  s   t  S r   )weakrefWeakKeyDictionaryr   r|   r|   r}   _type_memos  s    zDefaultDialect._type_memosc                 C  s   | j d | j S )N+)r   r   r   r|   r|   r}   dialect_description  s    z"DefaultDialect.dialect_descriptionc                 C  s   | j S )zTrue if this dialect supports sane rowcount even if RETURNING is
        in use.

        For dialects that don't support RETURNING, this is synonymous with
        ``supports_sane_rowcount``.

        )supports_sane_rowcountr   r|   r|   r}    supports_sane_rowcount_returning  s    	z/DefaultDialect.supports_sane_rowcount_returningr<   z
Type[Pool])urlr   c                 C  s   t | dtjS )NZ	poolclass)rp   r"   Z	QueuePool)clsr   r|   r|   r}   get_pool_class  s    zDefaultDialect.get_pool_classc                 C  s
   |  |S r   )r   )r{   r   r|   r|   r}   get_dialect_pool_class  s    z%DefaultDialect.get_dialect_pool_classc                 C  sD   d | jddd }zt|d  W n tk
r>   Y nX d S )N.r   z
.provision)join
__module__split
__import__ImportError)r   packager|   r|   r}   load_provisioning  s
    z DefaultDialect.load_provisioningzOptional[_ListenerFnType]c                   s"    j d k	r fdd}|S d S d S )Nc                   s     |  j d S r   )_assert_and_set_isolation_levelrw   )
dbapi_connZconn_recr   r|   r}   builtin_connect  s     z:DefaultDialect._builtin_onconnect.<locals>.builtin_connect)rw   )r{   r   r|   r   r}   _builtin_onconnect  s    
z!DefaultDialect._builtin_onconnectc                 C  s   z|  || _W n tk
r*   d | _Y nX z| || _W n tk
rV   d | _Y nX z| |jj| _W n tk
r   d | _Y nX | j	s| 
|}|r|| _| jr| j| jkrtd| j| jf d S )NzQLabel length of %d is greater than this dialect's maximum identifier length of %d)Z_get_server_version_infoserver_version_infoNotImplementedErrorZ_get_default_schema_namer_   get_default_isolation_level
connectiondbapi_connectiondefault_isolation_levelrT   _check_max_identifier_lengthrf   rg   r!   ro   )r{   r   Zmax_ident_lengthr|   r|   r}   
initialize  s>    





zDefaultDialect.initializec                 C  s   d S r   r|   r   r|   r|   r}   
on_connect   s    zDefaultDialect.on_connectc                 C  s   dS )zPerform a connection / server version specific check to determine
        the max_identifier_length.

        If the dialect's class level max_identifier_length should be used,
        can return None.

        .. versionadded:: 1.3.9

        Nr|   r{   r   r|   r|   r}   r     s    
z+DefaultDialect._check_max_identifier_lengthc                 C  s
   |  |S )a  Given a DBAPI connection, return its isolation level, or
        a default isolation level if one cannot be retrieved.

        May be overridden by subclasses in order to provide a
        "fallback" isolation level for databases that cannot reliably
        retrieve the actual isolation level.

        By default, calls the :meth:`_engine.Interfaces.get_isolation_level`
        method, propagating any exceptions raised.

        .. versionadded:: 1.3.22

        )Zget_isolation_levelr{   r   r|   r|   r}   r     s    z*DefaultDialect.get_default_isolation_levelc                 C  s   t || jS )a)  Provide a database-specific :class:`.TypeEngine` object, given
        the generic object which comes from the types module.

        This method looks for a dictionary called
        ``colspecs`` as a class or instance-level variable,
        and passes on to :func:`_types.adapt_type`.

        )r'   Z
adapt_typerW   )r{   Ztypeobjr|   r|   r}   type_descriptor   s    	zDefaultDialect.type_descriptorc                 K  sP   | j ||fd|i|sdS | j||fd|i|D ]}|d |kr4 dS q4dS )NschemaFr   T)Z	has_tableget_indexes)r{   r   Z
table_nameZ
index_namer   kwidxr|   r|   r}   	has_index+  s     
zDefaultDialect.has_indexr   str)r   schema_namer   r   c                 K  s   || j |f|kS r   )Zget_schema_names)r{   r   r   r   r|   r|   r}   
has_schema6  s    zDefaultDialect.has_schemac                 C  s&   t || jkr"td|| jf d S )Nz7Identifier '%s' exceeds maximum length of %d characters)lenrf   r!   ZIdentifierError)r{   identr|   r|   r}   validate_identifier;  s    z"DefaultDialect.validate_identifierc                 O  s   | j j||S r   )r   connect)r{   ZcargsZcparamsr|   r|   r}   r   B  s    zDefaultDialect.connectc                 C  s   |  }||j g |gS r   )Ztranslate_connect_argsupdatequery)r{   r   optsr|   r|   r}   create_connect_argsF  s    z"DefaultDialect.create_connect_argsr1   None)enginer   r   c                   sJ   t j}|rFtfdd|D  t|d fdd}d S )Nc                 3  s   | ]}| | fV  qd S r   r|   .0r   r   r|   r}   	<genexpr>S  s    z>DefaultDialect.set_engine_execution_options.<locals>.<genexpr>Zengine_connectc                   s    |   d S r   )_set_connection_characteristics)r   )r   r{   r|   r}   set_connection_characteristicsW  s     zSDefaultDialect.set_engine_execution_options.<locals>.set_connection_characteristics)setconnection_characteristicsintersectionr#   immutabledictr    Zlistens_for)r{   r   r   supported_namesr   r|   )r   r   r{   r}   set_engine_execution_optionsL  s    

z+DefaultDialect.set_engine_execution_options)r   r   r   c                   s<   t | j }|r8t fdd|D }| || d S )Nc                 3  s   | ]}| | fV  qd S r   r|   r   r   r|   r}   r   d  s    zBDefaultDialect.set_connection_execution_options.<locals>.<genexpr>)r   r   r   r#   r   r   )r{   r   r   r   r   r|   r   r}    set_connection_execution_options]  s    
z/DefaultDialect.set_connection_execution_optionsc           	        s    fdd|  D }| rNdd |D }|rNtdddd |D  |jj}|D ]\}}}| || qZ|jjj	
t j| d S )Nc                   s    g | ]\}}| j | |fqS r|   )r   )r   r   valuer   r|   r}   
<listcomp>k  s   zBDefaultDialect._set_connection_characteristics.<locals>.<listcomp>c                 S  s    g | ]\}}}|j r||fqS r|   )Ztransactional)r   r   objr   r|   r|   r}   r   q  s   zThis connection has already initialized a SQLAlchemy Transaction() object via begin() or autobegin; %s may not be altered unless rollback() or commit() is called first., c                 s  s   | ]\}}|V  qd S r   r|   )r   r   r   r|   r|   r}   r   |  s     zADefaultDialect._set_connection_characteristics.<locals>.<genexpr>)itemsZin_transactionr!   r   r   r   r   Zset_characteristicZ_connection_recordZfinalize_callbackappend	functoolspartial_reset_characteristics)	r{   r   r   Zcharacteristic_valuesZ
trans_objsr   r   characteristicr   r|   r   r}   r   i  s&    

z.DefaultDialect._set_connection_characteristicsc                 C  s$   |D ]}| j | }|| | qd S r   )r   Zreset_characteristic)r{   r   r   Zcharacteristic_namer   r|   r|   r}   r     s
    z%DefaultDialect._reset_characteristicsc                 C  s   d S r   r|   r{   r   r|   r|   r}   do_begin  s    zDefaultDialect.do_beginc                 C  s   |   d S r   )rollbackr   r|   r|   r}   do_rollback  s    zDefaultDialect.do_rollbackc                 C  s   |   d S r   )commitr   r|   r|   r}   	do_commit  s    zDefaultDialect.do_commitc                 C  s   |  | d S r   )do_closer   r|   r|   r}   do_terminate  s    zDefaultDialect.do_terminatec                 C  s   |   d S r   )closer   r|   r|   r}   r     s    zDefaultDialect.do_closec                 C  s   t tdj| dS )Nr   dialect)r   r&   selectcompiler   r|   r|   r}   _dialect_specific_select_one  s    z+DefaultDialect._dialect_specific_select_oner9   )r   r   c                 C  s   z|  |W S  | jjk
r } zl| ||d }| jrzztj|| |ddd W n* tjk
rx } z
|j	}W 5 d }~X Y nX |rW Y 
dS  W 5 d }~X Y nX d S )NFT)is_disconnectZinvalidate_pool_on_disconnectZis_pre_ping)
do_pingr   Errorr   _has_eventsr   Z$_handle_dbapi_exception_noconnectionr!   ZStatementErrorZconnection_invalidated)r{   r   errr   Znew_errr|   r|   r}   _do_ping_w_event  s$    

zDefaultDialect._do_ping_w_eventc                 C  s,   d }|  }z|| j W 5 |  X dS )NT)r   r   executer   )r{   r   r   r|   r|   r}   r     s    
zDefaultDialect.do_pingc                 C  s   dt ddd  S )zCreate a random two-phase transaction ID.

        This id will be passed to do_begin_twophase(), do_rollback_twophase(),
        do_commit_twophase().  Its format is unspecified.
        z	_sa_%032xr   r      )randomrandintr   r|   r|   r}   
create_xid  s    zDefaultDialect.create_xidc                 C  s   | t| d S r   )r   r&   ZSavepointClauser{   r   r   r|   r|   r}   do_savepoint  s    zDefaultDialect.do_savepointc                 C  s   | t| d S r   )r   r&   ZRollbackToSavepointClauser   r|   r|   r}   do_rollback_to_savepoint  s    z'DefaultDialect.do_rollback_to_savepointc                 C  s   | t| d S r   )r   r&   ZReleaseSavepointClauser   r|   r|   r}   do_release_savepoint  s    z#DefaultDialect.do_release_savepointc                 c  sp   t t|}t t|j}t|j}|jd| j}|r>g  |_	}	|
||||D ]}
|
V  |rN|	|  qNd S )Nr^   )r   DefaultExecutionContextr+   compiledrZ   effective_returningexecution_optionsr   r^   _insertmanyvalues_rows!_deliver_insertmanyvalues_batchesextendZfetchall)r{   r   	statement
parametersZgeneric_setinputsizescontextr  Zis_returningZ
batch_sizeresultZ	batch_recr|   r|   r}   r	    s$    

 
   z0DefaultDialect._deliver_insertmanyvalues_batchesc                 C  s   | || d S r   )executemanyr{   r   r  r  r  r|   r|   r}   do_executemany  s    zDefaultDialect.do_executemanyc                 C  s   | || d S r   r   r  r|   r|   r}   
do_execute  s    zDefaultDialect.do_executec                 C  s   | | d S r   r  )r{   r   r  r  r|   r|   r}   do_execute_no_params  s    z#DefaultDialect.do_execute_no_paramsc                 C  s   dS )NFr|   )r{   er   r   r|   r|   r}   r     s    zDefaultDialect.is_disconnectc                 C  sp   zt | |}W n tk
r(   Y d S X dd |D }||krdtd| jdtt|| t|S d S )Nc                 S  s   g | ]}| d d qS )_ )replaceupper)r   levelr|   r|   r}   r     s    z@DefaultDialect._gen_allowed_isolation_levels.<locals>.<listcomp>r   zi get_isolation_level_values() method should return names as UPPERCASE using spaces, not underscores; got )	listZget_isolation_level_valuesr   
ValueErrorr   sortedr   
differencetuple)r{   r   Z
raw_levelsZnormalized_levelsr|   r|   r}   _gen_allowed_isolation_levels  s    z,DefaultDialect._gen_allowed_isolation_levelsc              
   C  sZ   | dd }| |}|rJ||krJtd|d| jdd| | || d S )Nr  r  zInvalid value z1 for isolation_level. Valid isolation levels for z are r   )r  r  r   r!   ro   r   r   Zset_isolation_level)r{   r   r  Z_allowed_isolation_levelsr|   r|   r}   r     s    z.DefaultDialect._assert_and_set_isolation_levelc                 C  s   |  || j d S r   )r   r   r   r|   r|   r}   reset_isolation_level  s     z$DefaultDialect.reset_isolation_levelc                 C  s\   |d krd S |  }| }||kr(|S ||kr@| j|s@|S ||krTt|ddS |S d S )NT)quote)lowerr  rv   _requires_quotesr,   r{   r   Z
name_lowerZ
name_upperr|   r|   r}   normalize_name"  s    zDefaultDialect.normalize_namec                 C  sD   |d krd S |  }| }||kr(|S ||kr@| j|s@|}|S r   )r#  r  rv   r$  r%  r|   r|   r}   denormalize_name<  s    zDefaultDialect.denormalize_namec                 C  s   |S r   r|   r   r|   r|   r}   get_driver_connectionM  s    z$DefaultDialect.get_driver_connectionc                 C  s   t t| |jt t|jk	S r   )rp   r   __code__rJ   )r{   methodr|   r|   r}   _overrides_defaultP  s    
z!DefaultDialect._overrides_defaultc                 k  s  g }g }	t j|kr*|| j |	| j t j|krL|| j |	| j t j|krb|| j	 |
di }
|r|tjkr|t jkr|}nrg }d|i|}g }tj|kr|| tj|kr||	 |D ]0}z|||f| W q tk
r   Y qX q|rt|}|D ]}|r$||kr||f}z ||||fd|i|fV  W nN tjk
r } z||
krt||
|< W 5 d }~X Y n tjk
r   Y nX qd S )Nunreflectabler   )r   ZTABLEr   Zget_table_namesZget_temp_table_namesZVIEWZget_view_namesZget_temp_view_namesZMATERIALIZED_VIEWZget_materialized_view_namespopr   ANYrY   r
  	TEMPORARYr   r   r!   ZUnreflectableTableErrorZNoSuchTableError)r{   Zsingle_tbl_methodr   kindr   Zfilter_namesZscoper   Z	names_fnsZtemp_names_fnsr,  namesZname_kwfnsfntablekeyr   r|   r|   r}   _default_multi_reflectV  sf    






 

z%DefaultDialect._default_multi_reflectc                 K  s   | j | j|f|S r   )r6  Zget_table_optionsr{   r   r   r|   r|   r}   get_multi_table_options  s     z&DefaultDialect.get_multi_table_optionsc                 K  s   | j | j|f|S r   )r6  Zget_columnsr7  r|   r|   r}   get_multi_columns  s    z DefaultDialect.get_multi_columnsc                 K  s   | j | j|f|S r   )r6  Zget_pk_constraintr7  r|   r|   r}   get_multi_pk_constraint  s     z&DefaultDialect.get_multi_pk_constraintc                 K  s   | j | j|f|S r   )r6  Zget_foreign_keysr7  r|   r|   r}   get_multi_foreign_keys  s     z%DefaultDialect.get_multi_foreign_keysc                 K  s   | j | j|f|S r   )r6  r   r7  r|   r|   r}   get_multi_indexes  s    z DefaultDialect.get_multi_indexesc                 K  s   | j | j|f|S r   )r6  Zget_unique_constraintsr7  r|   r|   r}   get_multi_unique_constraints  s     z+DefaultDialect.get_multi_unique_constraintsc                 K  s   | j | j|f|S r   )r6  Zget_check_constraintsr7  r|   r|   r}   get_multi_check_constraints  s     z*DefaultDialect.get_multi_check_constraintsc                 K  s   | j | j|f|S r   )r6  Zget_table_commentr7  r|   r|   r}   get_multi_table_comment  s     z&DefaultDialect.get_multi_table_comment)N)N)N)N)__name__r   __qualname____doc__r$   r+   statement_compilerr*   ddl_compilerrx   ry   IdentifierPreparerru   Zsupports_alterZsupports_commentsZsupports_constraint_commentsZinline_commentsr   Zdiv_is_floordivr   rq   NONErr   rK   __annotations__rL   Zdefault_sequence_baser  execute_sequence_formatZsupports_schemasZsupports_viewssupports_sequencessequences_optional"preexecute_autoincrement_sequencessupports_identity_columnspostfetch_lastrowidZfavor_returning_over_lastrowidZ#insert_null_pk_still_autoincrementsr   r   Zupdate_returning_multifromZdelete_returning_multifromr   Zcte_follows_insertZsupports_native_enumre   Zsupports_native_uuidZ#non_native_boolean_check_constraintsupports_simple_order_by_labelZtuple_in_valuesr#   r   r   ZIsolationLevelCharacteristicr   ZasintZbool_or_strZasboolrR   Zsupports_native_decimalr   rf   rT   rM   rU   rV   r   supports_sane_multi_rowcountrW   rt   Zsupports_default_valuesZsupports_default_metavalueZdefault_metavalue_tokenZsupports_empty_insertr   r[   r\   r^   Zinsertmanyvalues_max_parametersZsupports_is_distinct_fromrn   ra   Zsupports_for_update_ofr   r_   Zrequires_name_normalizeZis_asyncZhas_terminateZ$_legacy_binary_type_literal_encodingZdeprecated_paramsr)   rz   r]   Z
NO_LINTINGr~   property
deprecatedr   r   update_executemany_returningdelete_executemany_returningmemoized_propertyr   r   r   r   r   r   r   classmethodr   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r  r  r  r	  r  r  r  r   Zmemoized_instancemethodr   r   r!  r&  r'  r(  r+  r6  r8  r9  r:  r;  r<  r=  r>  r?  r|   r|   r|   r}   rJ   o   s\  

	(R







$


	



JrJ   c                   @  sP   e Zd ZejZejZejZ	ej
ZdZdZdZdZdZdZdZdZdZdZdZdS )StrCompileDialectTFN)r@  r   rA  r$   ZStrSQLCompilerrC  r*   rD  ZStrSQLTypeCompilerry   rE  ru   r   r   r   r   rL  rI  rJ  rK  re   r   rN  r|   r|   r|   r}   rV    s   rV  c                   @  s  e Zd ZU dZdZdZdZdZdZe	j
Zded< dZded< dZded< dZd	ed
< ejZded< ejZdZded< dZdZdZdZdZdZdZded< e Zded< e Z!ded< ded< ded< ded< ded< ded< ded < d!ed"< e"d#ejZ#dZ$d$ed%< e%ddddd&d'd(d)d*Z&e%e'j(fddddd+d,d-d!d.d'd/
d0d1Z)e%ddddddd'd2d3d4Z*e%ddddd'd5d6d7Z+dd8d9d:Z,e-d;d< Z.ej/d=d> Z0ej/d?d@ Z1ej/dAd8dBdCZ2ej/dAd8dDdEZ3ej/dFdG Z4ddHdIZ5ej/dJdK Z6dLdM Z7dNdO Z8dPdQ Z9dRdS Z:dTdU Z;dVdW Z<dXdY Z=dZd[ Z>d\d] Z?d^d_ Z@ejAd`d8dadbZBdcdd ZCdedf ZDdgdh ZEdidj ZFdkdl ZGej/dmdn ZHdodp ZIdqdr ZJdsdt ZKdudv ZLdwd8dxdyZMdzd{ ZNd|d} ZOdZPd~ed< dddZQdd ZRdd ZSdd ZTdd ZUdS )r  Fr   execute_styleNzOptional[Compiled]r  zAOptional[Tuple[List[ResultColumnsEntry], bool, bool, bool, bool]]result_column_structzOptional[Sequence[Row[Any]]]returned_default_rowsr6   r  zOptional[Executable]invoked_statementzOptional[Callable[[str], str]]_translate_colnamezMapping[str, List[str]]_expanded_parametersr   root_connectionr?   _dbapi_connectionr   r   r   unicode_statementr   r   z%List[_MutableCoreSingleExecuteParams]compiled_parametersr5   r  z&Optional[Sequence[BindParameter[Any]]]extracted_parametersrQ   zOptional[List[Tuple[Any, ...]]]r  r*   r   )r   r   r   r  compiled_ddlr   c           
      C  s   |  | }||_||_|j|_| |_}d|_||_t||_|j	rh|j
di }|jj}	|	|j||_|j|_| |_g |_|jr| g|_n
|jg|_|S )zKInitialize execution context for an ExecutableDDLElement
        construct.Tschema_translate_map)__new__r]  r^  r   r  isddlr  r   r_  rc  r   ru   _render_schema_translatesr  create_cursorr   r`  rs   rH  r  _empty_dict_params)
r   r   r   r   r  rb  r{   r  rc  rstr|   r|   r}   	_init_ddl  s2    


  

z!DefaultExecutionContext._init_ddlr+   r2   r@   r   )
r   r   r   r  r  r  rZ  ra  	cache_hitr   c
                   s  |  | }
||
_||
_|j|
_|
_||
_ |
_|	|
_||
_ j	 j
 j j jf|
_ j |
_} j |
_} j |
_} j|
_|s|s|r jj}trt|tstd|
_t|j |
_}t j |
_}|r|j rd|
_!|r|rt|s|r j"r|r&|
jj#s&t$%d|
jj& dnr|rJ|
jj'rJ j(sJt$%dnN|rr|
jj)srt$%d|
jj& dn&|r|
jj*st$%d|
jj& d|s j+ddg|
_,nJ fd	d
t-|D |
_,t.|dkr|
jr j(rt/j0|
_1nt/j2|
_1 j3|
_4|
5 |
_6|
jj7s"|
jj8r<|
j9r4|
:  n|
;   j<}| j=sV j>r|
j9rht$%d ?|
j,d }|j|
_4|j@|
_AtB|C|jD |jE}n jFr|
jjE}nd} jGr|
jHdi } jIjJ}||
j4||
_4|
j4|
_ jFrBg }|dk	st|
j,D ]*fdd
|D }|K|L| q||
_MnZg } jN|
j,D ]BrtfddD }nfddD }|K| qR||
_M|
S )z6Initialize execution context for a Compiled construct.Tr   z] with current server capabilities does not support INSERT..RETURNING when executemany is usedznStatement does not have "insertmanyvalues" enabled, can't use INSERT..RETURNING with executemany in this case.z] with current server capabilities does not support UPDATE..RETURNING when executemany is usedz] with current server capabilities does not support DELETE..RETURNING when executemany is usedF)ra  escape_namesc                   s"   g | ]\}} j |d |dqS )F)rl  Z_group_numberra  )construct_params)r   grpm)r  ra  r|   r}   r     s   z:DefaultExecutionContext._init_compiled.<locals>.<listcomp>r   zL'literal_execute' or 'expanding' parameters can't be used with executemany()r   Nrc  c                   s,   g | ]$}|kr |  | n | qS r|   r|   r   r5  compiled_paramsflattened_processorsr|   r}   r     s   c                   s6   i | ].} |||kr*|  | n | qS r|   )r   rp  )rr  escaped_namesrs  r|   r}   
<dictcomp>  s   
z:DefaultExecutionContext._init_compiled.<locals>.<dictcomp>c                   s.   i | ]&}||kr"|  | n | qS r|   r|   rp  rq  r|   r}   ru    s
   )Ord  r]  r^  r   ra  rZ  r  rk  r  Z_result_columnsZ_ordered_columnsZ_textual_ordered_columnsZ_ad_hoc_textualZ_loose_column_name_matchingrX  isinsertisupdateisdeleteZisplaintextis_textcompile_stater  r   r   rE   AssertionErroris_crudrZ   Z
_returning_is_explicit_returningrd   _is_implicit_returningZ_supplemental_returning_is_supplemental_returningZfor_executemanyr   r!   r   r   r[   Z_insertmanyvaluesrR  rS  rm  r`  	enumerater   r   INSERTMANYVALUESrW  EXECUTEMANYstringr_  rg  r   insert_prefetchupdate_prefetchr  _process_executemany_defaults_process_executesingle_defaults_bind_processorsliteral_execute_paramsZpost_compile_paramsZ#_process_parameters_for_postcompileZparameter_expansionr\  dictr   
processorspositiontuprs   rc  r   ru   rf  r   rH  r  escaped_bind_names)r   r   r   r   r  r  r  rZ  ra  rk  r{   iiiuZid_Zdml_statementZierZiirr  Zexpanded_stater  rc  ri  Zcore_positional_parametersZl_paramZcore_dict_parametersZd_paramr|   )r  rr  rt  ra  rs  r}   _init_compiledE  s    







  

	z&DefaultExecutionContext._init_compiled)r   r   r   r  r  r  r   c                   s   |  | }||_||_|j|_d|_||_|sP|jjrD  g|_q|j	g|_nBt
|d  jrh||_n*t
|d tr~||_n fdd|D |_t|dkrtj|_| |_|_| |_|S )z8Initialize execution context for a string SQL statement.Tr   c                   s   g | ]}  |qS r|   )rH  )r   pr   r|   r}   r   9  s    z;DefaultExecutionContext._init_statement.<locals>.<listcomp>r   )rd  r]  r^  r   ry  r  rs   rH  r  rh  r   r  r   r   r  rW  r  r_  rg  r   )r   r   r   r   r  r  r  r{   r|   r   r}   _init_statement  s,    


z'DefaultExecutionContext._init_statement)r   r   r   r  r   c                 C  s2   |  | }||_||_|j|_||_| |_|S )z;Initialize execution context for a ColumnDefault construct.)rd  r]  r^  r   r  rg  r   )r   r   r   r   r  r{   r|   r|   r}   _init_defaultE  s    


z%DefaultExecutionContext._init_defaultr   c                 C  s   | j d krdS t }| j}| j j}|d k	s.t|tkrDd|| f S |tkrZd|| f S |tkrpd|| f S |tkrd|| f S |t	krd| j
j| j
j|| f S dS d S )Nzraw sqlzno key %.5fszcached since %.4gs agozgenerated in %.5fszcaching disabled %.5fsz,dialect %s+%s does not support caching %.5fsunknown)r  r   rk  Z	_gen_timer{  NO_CACHE_KEY	CACHE_HIT
CACHE_MISSCACHING_DISABLEDNO_DIALECT_SUPPORTr   r   r   )r{   nowchZgen_timer|   r|   r}   _get_cache_statsY  s*    
z(DefaultExecutionContext._get_cache_statsc                 C  s   | j tjtjfkS r   )rW  r   r  r  r   r|   r|   r}   r  u  s    z#DefaultExecutionContext.executemanyc                 C  s8   | j r| j jS d| jkr,| jj| jd S | jjS d S )Nrc  )r  ru   r  r   rv   Z_with_schema_translater   r|   r|   r}   rv   |  s    
z+DefaultExecutionContext.identifier_preparerc                 C  s   | j jS r   )r]  r   r   r|   r|   r}   r     s    zDefaultExecutionContext.enginezOptional[Sequence[Column[Any]]]c                 C  s   t rt| jtst| jjS r   )r   r   r  r+   r{  	postfetchr   r|   r|   r}   postfetch_cols  s    z&DefaultExecutionContext.postfetch_colsc                 C  s8   t rt| jtst| jr"| jjS | jr0| jjS dS d S )Nr|   )	r   r   r  r+   r{  rv  r  rw  r  r   r|   r|   r}   prefetch_cols  s    z%DefaultExecutionContext.prefetch_colsc                 C  s   | j ddS )Nno_parametersF)r  r   r   r|   r|   r}   r    s    z%DefaultExecutionContext.no_parametersc           
      C  s   | j }d| jkr0| jdi }| jj}|||}|sL| jjrH| j }ni }|j| j	||| d | j	
 }|dk	r||d }nd}|dk	r|| j| j	jd d }	|	r|	|S |S )a  Execute a string statement on the current cursor, returning a
        scalar result.

        Used to fire off sequences, default phrases, and "select lastrowid"
        types of statements individually or in the context of a parent INSERT
        or UPDATE statement.

        rc  )r  Nr   r   )r]  r  r   rv   rf  r   rs   rH  Z_cursor_executer   Zfetchone_cached_result_processordescription)
r{   Zstmttype_r  connrc  ri  rowrprocr|   r|   r}   _execute_scalar  s2    

 


 z'DefaultExecutionContext._execute_scalarc                 C  s   | j S r   )r]  r   r|   r|   r}   r     s    z"DefaultExecutionContext.connectionc                 C  sv   | j jsdS | j jrd| jddo`| jr8t| jjtj	p`| j sPt| jjtj
o`| jo`t| j}n| jdd}|S )NFstream_resultsT)r   rn   ra   r  r   r  r   r  r&   Z
SelectableZ
TextClauser_  SERVER_SIDE_CURSOR_REmatch)r{   Zuse_server_sider|   r|   r}   _use_server_side_cursor  s2      
 z/DefaultExecutionContext._use_server_side_cursorc                 C  sF   | j jr4| jdds&| j jr4|  r4d| _|  S d| _|  S d S )Nr  FT)	r   rn   r  r   ra   r  _is_server_sidecreate_server_side_cursorcreate_default_cursorr   r|   r|   r}   rg    s    z%DefaultExecutionContext.create_cursorc                 C  s
   | j  S r   )r^  r   r   r|   r|   r}   r    s    z-DefaultExecutionContext.create_default_cursorc                 C  s
   t  d S r   r   r   r|   r|   r}   r    s    z1DefaultExecutionContext.create_server_side_cursorc                 C  s   d S r   r|   r   r|   r|   r}   pre_exec  s    z DefaultExecutionContext.pre_execc                 C  s   t dd S )Nz,This dialect does not support OUT parametersr  )r{   r1  r|   r|   r}   get_out_parameter_values  s    z0DefaultExecutionContext.get_out_parameter_valuesc                 C  s   d S r   r|   r   r|   r|   r}   	post_exec
  s    z!DefaultExecutionContext.post_execc                 C  s   | | j|S )zReturn a 'result processor' for a given type as present in
        cursor.description.

        This has a default implementation that dialects can override
        for context-sensitive result type handling.

        )r  r   )r{   r  ZcolnameZcoltyper|   r|   r}   get_result_processor  s    z,DefaultExecutionContext.get_result_processorc                 C  s   | j jS )a  return self.cursor.lastrowid, or equivalent, after an INSERT.

        This may involve calling special cursor functions, issuing a new SELECT
        on the cursor (or a new one), or returning a stored value that was
        calculated within post_exec().

        This function will only be called for dialects which support "implicit"
        primary key generation, keep preexecute_autoincrement_sequences set to
        False, and when no explicit id value was bound to the statement.

        The function is called once for an INSERT statement that would need to
        return the last inserted primary key for those dialects that make use
        of the lastrowid concept.  In these cases, it is called directly after
        :meth:`.ExecutionContext.post_exec`.

        )r   	lastrowidr   r|   r|   r}   get_lastrowid  s    z%DefaultExecutionContext.get_lastrowidc                 C  s   d S r   r|   )r{   r  r|   r|   r}   handle_dbapi_exception*  s    z.DefaultExecutionContext.handle_dbapi_exceptionr]   c                 C  s   | j jS r   )r   rowcountr   r|   r|   r}   r  -  s    z DefaultExecutionContext.rowcountc                 C  s   | j jS r   )r   r   r   r|   r|   r}   r   1  s    z.DefaultExecutionContext.supports_sane_rowcountc                 C  s   | j jS r   )r   rO  r   r|   r|   r}   rO  4  s    z4DefaultExecutionContext.supports_sane_multi_rowcountc                 C  s   | j }| js| jr$|  }d }}nl|dd }| jp@|dd}| j}|rf|tjkrft	| j
| j }|jpr| j
j}|d krtj}t| ||}| j}|r| jstt|jr| | |j| _|r||}|S )NF	yield_perr  )r  r|  ry  _setup_dml_or_text_resultr   r  cursor_fetch_strategy_cursor_DEFAULT_FETCHBufferedRowCursorFetchStrategyr   alternate_cursor_descriptionr  Z_NO_CURSOR_DQLCursorResultr  re  r   r+   Zhas_out_parameters_setup_out_parameters_soft_closedr  )r{   Zexec_optr  Zypsrstrategycursor_descriptionr  r|   r|   r}   _setup_result_proxy7  s<    
 


z+DefaultExecutionContext._setup_result_proxyc                 C  s   t t| j}dd |j D }i }tdd |D | dd |D D ]P\}}|j}|| j	}|
| j	j}	|| j	|	}
|
d k	r|
|}|||j< qH||_d S )Nc                 S  s   g | ]\}}|j r||fqS r|   )Z
isoutparamr   paramr   r|   r|   r}   r   a  s   zADefaultExecutionContext._setup_out_parameters.<locals>.<listcomp>c                 S  s   g | ]\}}|qS r|   r|   r  r|   r|   r}   r   i  s     c                 S  s   g | ]\}}|qS r|   r|   r  r|   r|   r}   r   k  s     )r   r+   r  
bind_namesr   zipr  r   Zdialect_implr   Zget_dbapi_typer   result_processorr5  out_parameters)r{   r  r  Zout_bindparamsr  	bindparamZ	raw_valuer  Z	impl_typeZ
dbapi_typer  r|   r|   r}   r  ^  s,     z-DefaultExecutionContext._setup_out_parametersc                 C  s  t t| j}| j}| jrP| jtjkr@|jr@t	j
| j| j|jd}|jrP|  | _| jrp|t	jkrpt	| j| j}|jp|| jj}|d krt	j}t	| ||}| jr| jr| }|| _| ||| _|jjst| jr| | q|!  n| j"s|!  n| jrR| }|r|| _t#||_$d| _%| jr:| | n|!  |jjstn<|jjsr|j$ d| _%|!  n| j&s| j'r|j$ d| _%|S )N)Zinitial_bufferZalternate_descriptionT)(r   r+   r  r  rv  rW  r   r  r  r  Z FullyBufferedCursorFetchStrategyr   r  r  rM  _setup_ins_pk_from_lastrowidinserted_primary_key_rowsr  r  r  r  r  Z_NO_CURSOR_DMLr  r~  allrY  %_setup_ins_pk_from_implicit_returning	_metadataZreturns_rowsr{  r  _rewindZ_soft_closer}  r   r  _has_rowcountrw  rx  )r{   r  r  r  r  rowsr|   r|   r}   r  {  sv    

   





z1DefaultExecutionContext._setup_dml_or_text_resultc                 C  s   |   S r   )_setup_ins_pk_from_emptyr   r|   r|   r}   r    s    z1DefaultExecutionContext.inserted_primary_key_rowsc                 C  s(   t t| jj}|  }||| jd gS Nr   )r   r+   r  +_inserted_primary_key_from_lastrowid_getterr  r`  )r{   getterr  r|   r|   r}   r    s     z4DefaultExecutionContext._setup_ins_pk_from_lastrowidc                   s"   t t| jj  fdd| jD S )Nc                   s   g | ]} d |qS r   r|   )r   r  r  r|   r}   r     s     zDDefaultExecutionContext._setup_ins_pk_from_empty.<locals>.<listcomp>)r   r+   r  r  r`  r   r|   r  r}   r    s
     z0DefaultExecutionContext._setup_ins_pk_from_emptyc                   s4   |sg S t t| jj | j} fddt||D S )Nc                   s   g | ]\}} ||qS r|   r|   )r   r  r  r  r|   r}   r     s    zQDefaultExecutionContext._setup_ins_pk_from_implicit_returning.<locals>.<listcomp>)r   r+   r  Z+_inserted_primary_key_from_returning_getterr`  r  )r{   r  r  rr  r|   r  r}   r    s     
z=DefaultExecutionContext._setup_ins_pk_from_implicit_returningc                 C  s   | j s| jottt| jjS r   )rv  rw  rZ   r   r+   r  r  r   r|   r|   r}   lastrow_has_defaults  s    z,DefaultExecutionContext.lastrow_has_defaultsz0Optional[List[Tuple[str, Any, TypeEngine[Any]]]]c                   s  | j s| jrdS tt| j }|dkr0dS | j}|jr^t|}|j	
|| j| j| j|  jrljnd|jrfddjpdD }ndd j D }g }|D ]\}  jkrq|| jkrFt jrt jj|  | fddt| j| D  n.| d| fdd| j| D  q| ddk	rh||n|}|| jf q|S )	a  Given a cursor and ClauseParameters, prepare arguments
        in order to call the appropriate
        style of ``setinputsizes()`` on the cursor, using DB-API types
        from the bind parameter's ``TypeEngine`` objects.

        This method only called by those dialects which set
        the :attr:`.Dialect.bind_typing` attribute to
        :attr:`.BindTyping.SETINPUTSIZES`.   cx_Oracle is the only DBAPI
        that requires setinputsizes(), pyodbc offers it as an option.

        Prior to SQLAlchemy 2.0, the setinputsizes() approach was also used
        for pg8000 and asyncpg, which has been changed to inline rendering
        of casts.

        Nc                   s   g | ]}| j | fqS r|   )Zbindsrp  )r  r|   r}   r   4  s   zDDefaultExecutionContext._prepare_set_input_sizes.<locals>.<listcomp>r|   c                 S  s   g | ]\}}||fqS r|   r|   )r   r  r5  r|   r|   r}   r   9  s   c                 3  sD   | ]<\}}d k	r ||n||   jj|  fV  qd S r   )r   r   types)r   r   	paramname)r  dbtypesr  numr|   r}   r   G  s   

zCDefaultExecutionContext._prepare_set_input_sizes.<locals>.<genexpr>c                 3  s.   | ]&}d k	r ||n| jfV  qd S r   )r   r   )r   r  )r  dbtyper  r|   r}   r   W  s   
)re  ry  r   r+   r  Z_get_set_input_sizes_lookupr   r   r  dispatchZdo_setinputsizesr   r  r  r  rs   r  r  r   r  r\  r(   r   r   r  r
  r  r   r   )r{   Z
inputsizesr   r   Zgeneric_inputsizesr5  Zescaped_namer|   )r  r  r  r  r  r  r}   _prepare_set_input_sizes  sh        






z0DefaultExecutionContext._prepare_set_input_sizesc                 C  sF   |j r| ||S |jr(|| _|| S |jr<| |||S |jS d S r   )Zis_sequenceZfire_sequenceZis_callablecurrent_columnr   Zis_clause_element_exec_default_clause_element)r{   columnrS   r  r|   r|   r}   _exec_defaultr  s    
z%DefaultExecutionContext._exec_defaultc                   s   |j st|j|}n|j}t|j| jd}|  |j|j	rh| j
 fdd|jp^dD }n fdd D }| jt|||dS )Nr   c                   s,   g | ]$}|kr |  | n | qS r|   r|   rp  rr  r  r|   r}   r     s   zHDefaultExecutionContext._exec_default_clause_element.<locals>.<listcomp>r|   c                   s.   i | ]&}||kr"|  | n | qS r|   r|   rp  r  r|   r}   ru    s
   zHDefaultExecutionContext._exec_default_clause_element.<locals>.<dictcomp>)r  )Z_arg_is_typedr&   Ztype_coercer   r   r   r   rm  r  rs   rH  r  r  r   )r{   r  rS   r  Zdefault_argr  r  r|   r  r}   r  }  s(    	  z4DefaultExecutionContext._exec_default_clause_elementz"Optional[_CoreSingleExecuteParams]current_parametersTc                   s   z| j | j}W n tk
r.   tdY nX |dk	s<tdk	sHttdtt| jj	}|dk	sht|rt
|r|jr|jr|jd  |jj|j i}n|j|j i}d |jdk	st|j }| fdd|D  |S S dS )ai  Return a dictionary of parameters applied to the current row.

        This method can only be used in the context of a user-defined default
        generation function, e.g. as described at
        :ref:`context_default_functions`. When invoked, a dictionary is
        returned which includes entries for each column/value pair that is part
        of the INSERT or UPDATE statement. The keys of the dictionary will be
        the key value of each :class:`_schema.Column`,
        which is usually synonymous
        with the name.

        :param isolate_multiinsert_groups=True: indicates that multi-valued
         INSERT constructs created using :meth:`_expression.Insert.values`
         should be
         handled by returning only the subset of parameters that are local
         to the current column default invocation.   When ``False``, the
         raw parameters of the statement are returned including the
         naming convention used in the case of multi-valued INSERT.

        .. versionadded:: 1.2  added
           :meth:`.DefaultExecutionContext.get_current_parameters`
           which provides more functionality over the existing
           :attr:`.DefaultExecutionContext.current_parameters`
           attribute.

        .. seealso::

            :attr:`.DefaultExecutionContext.current_parameters`

            :ref:`context_default_functions`

        zdget_current_parameters() can only be invoked in the context of a Python side column default functionNrD   r   r   c                 3  s"   | ]}|d | f  fV  qdS )z%s_m%dNr|   rp  indexr  r|   r}   r     s    zADefaultExecutionContext.get_current_parameters.<locals>.<genexpr>)r  r  AttributeErrorr!   r   r{  r   r+   r  rz  r%   rv  Z_has_multi_parametersZ_is_multiparam_columnr  originalr5  Z_dict_parameterskeysr   )r{   Zisolate_multiinsert_groupsr  rz  dr  r|   r  r}   get_current_parameters  s@    !

 

z.DefaultExecutionContext.get_current_parametersc                 C  s$   |j d krd S | ||j |jS d S r   )rS   r  r   r{   r  r|   r|   r}   get_insert_default  s    
z*DefaultExecutionContext.get_insert_defaultc                 C  s$   |j d krd S | ||j |jS d S r   )onupdater  r   r  r|   r|   r}   get_update_default  s    
z*DefaultExecutionContext.get_update_defaultc           	      C  s   t t| j}|j}i }|j}|j}|D ] }|jr&t|jr&|jj||< q&|D ] }|j	rLt|j	rL|j	j||< qL| j
D ]~}|| _|D ]4}||kr|| }n
| |}|d k	r||||< q|D ]4}||kr|| }n
| |}|d k	r||||< qqt| `d S r   )r   r+   r  _within_exec_param_key_getterr  r  rS   r-   r   r  r`  r  r  r  )	r{   r  
key_getterZscalar_defaultsr  r  cr  valr|   r|   r}   r  	  s4    




z5DefaultExecutionContext._process_executemany_defaultsc                 C  s   t t| j}|j}| jd  | _}|jD ]<}|jrFt|jrF|jj	}n
| 
|}|d k	r(||||< q(|jD ]"}| |}|d k	rl||||< ql| `d S r  )r   r+   r  r  r`  r  r  rS   r-   r   r  r  r  )r{   r  r  r`  r  r  r|   r|   r}   r  1  s     




z7DefaultExecutionContext._process_executesingle_defaults)N)T)Vr@  r   rA  rv  rw  rx  r|  ry  re  r   ZEXECUTErW  rG  r  rX  rY  r#   
EMPTY_DICTr  r  r  r  rZ  r~  r}  r  r  r  r  r[  r   r\  r  rk  r   rh  r  rU  rj  r   r  r  r  r  r  rP  r  rT  rv   r   r  r  r  r  r   r  rg  r  r  r  r  r  r  r  r  Znon_memoized_propertyr  r   rO  r  r  r  r  r  r  r  r  r  r  r  r  r  r  r  r  r  r|   r|   r|   r}   r    s   

,$ V)






)

'f
j#
D(r  )lrB  
__future__r   r   r   retimer   typingr   r   r   r   r   r	   r
   r   r   r   r   r   r   r   r   r    r   r   r  r   baser   r   r   r   r   r   Z
reflectionr   r   r    r!   r"   r#   Zsqlr$   r%   r&   r'   Zsql._typingr(   Zsql.baser)   Zsql.compilerr*   r+   Zsql.elementsr,   Z
sql.schemar-   Zutil.typingr.   r/   r  r0   r1   r2   r3   r4   r5   r6   r7   r8   r9   r:   r  r;   r   r<   r=   r>   r?   r@   rA   rB   rC   Zsql.dmlrD   rE   rF   rG   Zsql.type_apirH   rI   r   IUNICODEr  r  r  r  r  r  r  rJ   rV  r  Zexecution_ctx_clsr|   r|   r|   r}   <module>	   s   	      \        t