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    Ha3                  
   @   s  d Z ddlZddl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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 zddlZddlZddlZW n. ek
r Z  ze	de  W 5 dZ [ X Y nX dd Z!e! Z"e"dk r
e	dej# 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/ ej01eej0j2 ej34  dZ5ej06e5fdej0j7Z8ej09e8 G dd deZ:G dd deZdS )zW
PostgreSQL database backend for Django.

Requires psycopg 2: https://www.psycopg.org/
    N)contextmanager)settings)ImproperlyConfigured)DatabaseErrorconnections)BaseDatabaseWrapperCursorDebugWrapper)async_unsafe)cached_property)
SafeString)get_version_tuplez!Error loading psycopg2 module: %sc                  C   s   t jddd } t| S )N    r   )psycopg2__version__splitr   )version r   F/tmp/pip-unpacked-wheel-3jxiddxt/django/db/backends/postgresql/base.pypsycopg2_version    s    r   )         z8psycopg2_version 2.5.4 or newer is required; you have %sr   )DatabaseClient)DatabaseCreation)DatabaseFeatures)DatabaseIntrospection)DatabaseOperations)DatabaseSchemaEditori  	INETARRAYc                       s>  e Zd ZdZdZddddddd	d
dddddddddddddddddddddZddddZdddddddd d!d"ddddd#Zd$Zd%d&d'd(d)d*d+Z	e
Z
eZeZeZeZeZeZd,Zd-d. Zed/d0 Zd1d2 Zd3d4 ZedHd6d7Zd8d9 Zed:d; Zd<d= Z dId>d?Z!d@dA Z"e# fdBdCZ$e%dDdE Z&dFdG Z'  Z(S )JDatabaseWrapper
postgresqlZ
PostgreSQLserialZ	bigserialZbyteabooleanzvarchar(%(max_length)s)dateztimestamp with time zonez+numeric(%(max_digits)s, %(decimal_places)s)intervalzdouble precisionintegerZbigintZinetZjsonbZsmallintZsmallserialtexttimeuuid)Z	AutoFieldZBigAutoFieldZBinaryFieldZBooleanFieldZ	CharFieldZ	DateFieldZDateTimeFieldZDecimalFieldZDurationFieldZ	FileFieldZFilePathFieldZ
FloatFieldZIntegerFieldZBigIntegerFieldZIPAddressFieldZGenericIPAddressFieldZ	JSONFieldZNullBooleanFieldZOneToOneFieldPositiveBigIntegerFieldPositiveIntegerFieldPositiveSmallIntegerFieldZ	SlugFieldZSmallAutoFieldZSmallIntegerFieldZ	TextFieldZ	TimeFieldZ	UUIDFieldz"%(column)s" >= 0)r+   r,   r-   z= %sz= UPPER(%s)zLIKE %szLIKE UPPER(%s)z~ %sz~* %sz> %sz>= %sz< %sz<= %s)exactZiexactcontains	icontainsregexZiregexgtZgteltZlte
startswithendswithistartswith	iendswithzKREPLACE(REPLACE(REPLACE({}, E'\\', E'\\\\'), E'%%', E'\\%%'), E'_', E'\\_')zLIKE '%%' || {} || '%%'zLIKE '%%' || UPPER({}) || '%%'zLIKE {} || '%%'zLIKE UPPER({}) || '%%'zLIKE '%%' || {}zLIKE '%%' || UPPER({}))r/   r0   r4   r6   r5   r7   r   c                 C   s   | j }|d dkrtdt|d p&d| j krXtd|d t|d | j f d|d pddi|d }|dd  |d	 r|d	 |d
< |d r|d |d< |d r|d |d< |d r|d |d< |S )NNAME zJsettings.DATABASES is improperly configured. Please supply the NAME value.zThe database name '%s' (%d characters) is longer than PostgreSQL's limit of %d characters. Supply a shorter NAME in settings.DATABASES.ZdatabasepostgresOPTIONSisolation_levelUSERuserZPASSWORDpasswordZHOSThostZPORTport)settings_dictr   lenopsZmax_name_lengthpop)selfrB   conn_paramsr   r   r   get_connection_params   s:    

 
z%DatabaseWrapper.get_connection_paramsc                 C   st   t jf |}| jd }z|d | _W n tk
r@   |j| _Y nX | j|jkr\|j| jd tjj|dd d |S )Nr;   r<   )r<   c                 S   s   | S Nr   )xr   r   r   <lambda>       z4DatabaseWrapper.get_new_connection.<locals>.<lambda>)Zconn_or_cursloads)	DatabaseconnectrB   r<   KeyErrorZset_sessionr   extrasZregister_default_jsonb)rF   rG   
connectionoptionsr   r   r   get_new_connection   s    
z"DatabaseWrapper.get_new_connectionc              	   C   s^   | j d krdS | j d}| j}|rZ||krZ| j  }|| j |g W 5 Q R X dS dS )NFZTimeZoneT)rR   Zget_parameter_statustimezone_namecursorexecuterD   Zset_time_zone_sql)rF   Zconn_timezone_namerU   rV   r   r   r   ensure_timezone   s    
zDatabaseWrapper.ensure_timezonec                 C   s.   | j d |  }|r*|  s*| j   d S )NUTF8)rR   Zset_client_encodingrX   Zget_autocommitcommit)rF   Ztimezone_changedr   r   r   init_connection_state   s
    z%DatabaseWrapper.init_connection_stateNc                 C   s<   |r| j j|d| j jd}n
| j  }tjr2| jnd |_|S )NF)Z
scrollableZwithhold)rR   rV   
autocommitr   ZUSE_TZtzinfo_factory)rF   namerV   r   r   r   create_cursor   s
    
zDatabaseWrapper.create_cursorc                 C   s   | j S rI   )timezone)rF   offsetr   r   r   r]      s    zDatabaseWrapper.tzinfo_factoryc                 C   s~   |  j d7  _ z"ttdr$t }n
tj }W n tk
rH   d }Y nX |r\tt|}nd}| jdt	
 j|| j f dS )Nr   current_tasksyncz_django_curs_%d_%s_%d)r^   )_named_cursor_idxhasattrasynciorb   ZTaskRuntimeErrorstridZ_cursor	threadingcurrent_threadident)rF   rb   Z
task_identr   r   r   chunked_cursor   s"    


zDatabaseWrapper.chunked_cursorc              	   C   s   | j  || j_W 5 Q R X d S rI   )Zwrap_database_errorsrR   r\   )rF   r\   r   r   r   _set_autocommit  s    zDatabaseWrapper._set_autocommitc              	   C   s,   |   }|d |d W 5 Q R X dS )zl
        Check constraints by setting them to immediate. Return them to deferred
        afterward.
        zSET CONSTRAINTS ALL IMMEDIATEzSET CONSTRAINTS ALL DEFERREDN)rV   rW   )rF   Ztable_namesrV   r   r   r   check_constraints  s    

z!DatabaseWrapper.check_constraintsc              	   C   sF   z$| j  }|d W 5 Q R X W n tjk
r<   Y dS X dS d S )NzSELECT 1FT)rR   rV   rW   rN   ErrorrF   rV   r   r   r   	is_usable   s    zDatabaseWrapper.is_usablec                 #   s   z t   }|V  W 5 Q R X W n tjtfk
r   tdt t	 D ]j}|j
dkrJ|jd dkrJ| j| jd|jd i| jd}z| }|V  W 5 Q R X W 5 |  X  qqJ Y nX d S )Na8  Normally Django will use a connection to the 'postgres' database to avoid running initialization queries against the production database when it's not needed (for example, when running tests). Django was unable to create a connection to the 'postgres' database and will use the first PostgreSQL database instead.r"   r8   r:   )alias)super_nodb_cursorrN   r   WrappedDatabaseErrorwarningswarnRuntimeWarningr   allvendorrB   	__class__rs   closerV   )rF   rV   rR   connr|   r   r   ru   *  s(    

zDatabaseWrapper._nodb_cursorc              
   C   s(   |    | jjW  5 Q R  S Q R X d S rI   )Ztemporary_connectionrR   Zserver_version)rF   r   r   r   
pg_versionG  s    
zDatabaseWrapper.pg_versionc                 C   s
   t || S rI   r   rq   r   r   r   make_debug_cursorL  s    z!DatabaseWrapper.make_debug_cursor)N)N))__name__
__module____qualname__r{   Zdisplay_name
data_typesZdata_type_check_constraints	operatorsZpattern_escZpattern_opsrN   r   ZSchemaEditorClassr   Zclient_classr   Zcreation_classr   Zfeatures_classr   Zintrospection_classr   Z	ops_classrd   rH   r
   rT   rX   r[   r_   r]   rm   rn   ro   rr   r   ru   r   r   r   __classcell__r   r   r   r   r!   A   s   	 
	


	

r!   c                   @   s   e Zd Zdd Zdd ZdS )r	   c              
   G   s6   |  |" | jj||f| W  5 Q R  S Q R X d S rI   )	debug_sqlrV   copy_expert)rF   sqlfileargsr   r   r   r   Q  s    zCursorDebugWrapper.copy_expertc              
   O   s>   | j d| d$ | jj||f||W  5 Q R  S Q R X d S )NzCOPY %s TO STDOUT)r   )r   rV   copy_to)rF   r   tabler   kwargsr   r   r   r   U  s    zCursorDebugWrapper.copy_toN)r   r   r   r   r   r   r   r   r   r	   P  s   r	   );__doc__rf   rj   rw   
contextlibr   Zdjango.confr   Zdjango.core.exceptionsr   Z	django.dbr   rv   r   Zdjango.db.backends.base.baser   Zdjango.db.backends.utilsr	   ZBaseCursorDebugWrapperZdjango.utils.asyncior
   Zdjango.utils.functionalr   Zdjango.utils.safestringr   Zdjango.utils.versionr   r   rN   Zpsycopg2.extensionsZpsycopg2.extrasImportErrorer   ZPSYCOPG2_VERSIONr   clientr   Zcreationr   featuresr   Zintrospectionr   
operationsr   Zschemar   
extensionsZregister_adapterQuotedStringrQ   Zregister_uuidZINETARRAY_OIDZnew_array_typeUNICODEr    Zregister_typer!   r   r   r   r   <module>   sT   

  