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     5i4                  
   @   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-gcyiijx6/django/db/backends/postgresql/base.pypsycopg2_version    s    r   )         z8psycopg2 version 2.8.4 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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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,|di ds,tdt|d p8d| j krjtd|d t|d | j f i }|d rd|d i|d }n<|d d kr|di dd  ddi|d }n
|d }|d	d  |d
 r|d
 |d< |d r|d |d< |d r|d |d< |d r(|d |d< |S )NNAME OPTIONSZservicez`settings.DATABASES is improperly configured. Please supply the NAME or OPTIONS['service'] 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isolation_levelUSERuserZPASSWORDpasswordZHOSThostZPORTport)settings_dictgetr   lenopsZmax_name_lengthpop)selfrB   conn_paramsr   r   r   get_connection_params   sL    

	 


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)rG   rH   
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)rS   Zget_parameter_statustimezone_namecursorexecuterE   Zset_time_zone_sql)rG   Zconn_timezone_namerV   rW   r   r   r   ensure_timezone   s    
zDatabaseWrapper.ensure_timezonec                 C   s.   | j d |  }|r*|  s*| j   d S )NUTF8)rS   Zset_client_encodingrY   Zget_autocommitcommit)rG   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)rS   rW   
autocommitr   ZUSE_TZtzinfo_factory)rG   namerW   r   r   r   create_cursor   s
    
zDatabaseWrapper.create_cursorc                 C   s   | j S rJ   )timezone)rG   offsetr   r   r   r^      s    zDatabaseWrapper.tzinfo_factoryc                 C   sh   |  j d7  _ zt }W n tk
r2   d }Y nX |rFtt|}nd}| jdt j	|| j f dS )Nr   syncz_django_curs_%d_%s_%d)r_   )
_named_cursor_idxasynciocurrent_taskRuntimeErrorstridZ_cursor	threadingcurrent_threadident)rG   rf   Z
task_identr   r   r   chunked_cursor   s    
zDatabaseWrapper.chunked_cursorc              	   C   s   | j  || j_W 5 Q R X d S rJ   )Zwrap_database_errorsrS   r]   )rG   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)rW   rX   )rG   Ztable_namesrW   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)rS   rW   rX   rO   ErrorrG   rW   r   r   r   	is_usable'  s    zDatabaseWrapper.is_usablec                 #   s   d }z t   }|V  W 5 Q R X W n tjtfk
r   |d k	rD tdt t	 D ]j}|j
dkrX|jd dkrX| j| jd|jd i| jd}z| }|V  W 5 Q R X W 5 |  X  qqX 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_cursorrO   r   WrappedDatabaseErrorwarningswarnRuntimeWarningr   allvendorrB   	__class__rs   closerW   )rG   rW   rS   connr|   r   r   ru   1  s.    

zDatabaseWrapper._nodb_cursorc              
   C   s(   |    | jjW  5 Q R  S Q R X d S rJ   )Ztemporary_connectionrS   Zserver_version)rG   r   r   r   
pg_versionQ  s    
zDatabaseWrapper.pg_versionc                 C   s
   t || S rJ   r   rq   r   r   r   make_debug_cursorV  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_opsrO   r   ZSchemaEditorClassr   Zclient_classr   Zcreation_classr   Zfeatures_classr   Zintrospection_classr   Z	ops_classrd   rI   r
   rU   rY   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 rJ   )	debug_sqlrW   copy_expert)rG   sqlfileargsr   r   r   r   [  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   rW   copy_to)rG   r   tabler   kwargsr   r   r   r   _  s    zCursorDebugWrapper.copy_toN)r   r   r   r   r   r   r   r   r   r	   Z  s   r	   );__doc__re   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   rO   Zpsycopg2.extensionsZpsycopg2.extrasImportErrorer   ZPSYCOPG2_VERSIONr   clientr   Zcreationr   featuresr   Zintrospectionr   
operationsr   Zschemar   
extensionsZregister_adapterQuotedStringrR   Zregister_uuidZINETARRAY_OIDZnew_array_typeUNICODEr    Zregister_typer!   r   r   r   r   <module>   sT   

  