
 X.+                 @   sZ   d  d l  m Z d  d l m Z d  d l m Z d  d l m Z Gd d   d e  Z d S)    )unicode_literals)Inet)settings)BaseDatabaseOperationsc                   s  e  Z d  Z d d   Z d d   Z d d   Z d d   Z d	 d
   Z d d   Z d d   Z	 d d   Z
 d d   Z d d d  Z d d   Z d d   Z d d   Z d d   Z d d   Z d  d! d"  Z d# d$   Z d  d% d&  Z d' d(   Z d) d*   Z d+ d,   Z d- d.   Z d/ d0   Z d1 d2   Z d3 d4   Z d5 d6   Z d7 d8   Z d9 d:   Z d; d<   Z   f d= d>   Z  d? d@   Z!   S)ADatabaseOperationsc             C   s=   | j    } | d	 k r9 d | j |  j  j d  d Sd S)
NGenericIPAddressFieldIPAddressField	TimeField	UUIDFieldzCAST(%%s AS %s)(r   z%s)r   r   r	   r
   )Zget_internal_typeZdb_type
connectionsplit)selfZoutput_fieldinternal_type r   V/home/ubuntu/projects/ifolica/build/django/django/db/backends/postgresql/operations.pyunification_cast_sql
   s    !z'DatabaseOperations.unification_cast_sqlc             C   s&   | d k r d | Sd | | f Sd  S)NZweek_dayzEXTRACT('dow' FROM %s) + 1zEXTRACT('%s' FROM %s)r   )r   lookup_type
field_namer   r   r   date_extract_sql   s    z#DatabaseOperations.date_extract_sqlc             C   s   d | | f S)NzDATE_TRUNC('%s', %s)r   )r   r   r   r   r   r   date_trunc_sql   s    z!DatabaseOperations.date_trunc_sqlc             C   s/   t  j r d | } | g } n g  } | | f S)Nz%s AT TIME ZONE %%s)r   ZUSE_TZ)r   r   tznameparamsr   r   r   _convert_field_to_tz#   s
    	
z'DatabaseOperations._convert_field_to_tzc             C   s,   |  j  | |  \ } } d | } | | f S)Nz
(%s)::date)r   )r   r   r   r   sqlr   r   r   datetime_cast_date_sql+   s    
z)DatabaseOperations.datetime_cast_date_sqlc             C   s4   |  j  | |  \ } } |  j | |  } | | f S)N)r   r   )r   r   r   r   r   r   r   r   r   datetime_extract_sql0   s    z'DatabaseOperations.datetime_extract_sqlc             C   s2   |  j  | |  \ } } d | | f } | | f S)NzDATE_TRUNC('%s', %s))r   )r   r   r   r   r   r   r   r   r   datetime_trunc_sql5   s    z%DatabaseOperations.datetime_trunc_sqlc             C   s   d S)Nz DEFERRABLE INITIALLY DEFERREDr   )r   r   r   r   deferrable_sql;   s    z!DatabaseOperations.deferrable_sqlc             C   s   d d   | j    D S)z
        Given a cursor object that has just performed an INSERT...RETURNING
        statement into a table that has an auto-incrementing ID, return the
        list of newly created IDs.
        c             S   s   g  |  ] } | d   q S)r   r   ).0itemr   r   r   
<listcomp>D   s   	 z@DatabaseOperations.fetch_returned_insert_ids.<locals>.<listcomp>)Zfetchall)r   cursorr   r   r   fetch_returned_insert_ids>   s    z,DatabaseOperations.fetch_returned_insert_idsNc          
   C   sM   d } | d k r0 | d k r' d } q0 d } n  | d k rI d | } n  | S)Nz%siexactcontains	icontains
startswithistartswithendswith	iendswithregexiregexr   r   zHOST(%s)z%s::textz	UPPER(%s))	r$   zcontainsr&   z
startswithr(   zendswithr*   zregexr,   )zIPAddressFieldzGenericIPAddressField)r$   r&   r(   r*   r   )r   r   r   lookupr   r   r   lookup_castF   s    			zDatabaseOperations.lookup_castc             C   s.   | j  d |  j |  | f  | j   d S)Nz1SELECT CURRVAL(pg_get_serial_sequence('%s','%s'))r   )execute
quote_nameZfetchone)r   r"   
table_nameZpk_namer   r   r   last_insert_idW   s    	z!DatabaseOperations.last_insert_idc             C   s   d  S)Nr   )r   r   r   r   no_limit_value^   s    z!DatabaseOperations.no_limit_valuec             C   s   | g S)Nr   )r   r   r   r   r   prepare_sql_scripta   s    z%DatabaseOperations.prepare_sql_scriptc             C   s*   | j  d  r" | j d  r" | Sd | S)N"z"%s")r'   r)   )r   namer   r   r   r0   d   s    zDatabaseOperations.quote_namec             C   s   d S)NzSET TIME ZONE %sr   )r   r   r   r   set_time_zone_sqli   s    z$DatabaseOperations.set_time_zone_sqlFc                s   | r d j     f d d   | D  } | r\ d  j d  |  j d  f g } n d  j d  | f g } | j   j  |   | Sg  Sd  S)Nz, c             3   s'   |  ] }  j    j |   Vq d  S)N)	SQL_FIELDr0   )r   table)r   styler   r   	<genexpr>r   s    z/DatabaseOperations.sql_flush.<locals>.<genexpr>z	%s %s %s;ZTRUNCATEZCASCADEz%s %s;)joinSQL_KEYWORDextendsequence_reset_by_name_sql)r   r:   Ztables	sequencesZallow_cascadeZ
tables_sqlr   r   )r   r:   r   	sql_flushl   s    zDatabaseOperations.sql_flushc             C   s   g  } x | D]y } | d } | d } | o< t  |  d k sH d } n  | j d | j d  | j |  j |   | j |  f  q W| S)Nr9   columnr   idz7%s setval(pg_get_serial_sequence('%s','%s'), 1, false);SELECT)lenappendr=   	SQL_TABLEr0   r8   )r   r:   r@   r   Zsequence_infor1   Zcolumn_namer   r   r   r?      s    

		z-DatabaseOperations.sequence_reset_by_name_sqlc             C   s,   | r d |  j  |  Sd |  j  |  Sd  S)NzUSING INDEX TABLESPACE %szTABLESPACE %s)r0   )r   Z
tablespaceinliner   r   r   tablespace_sql   s    z!DatabaseOperations.tablespace_sqlc             C   s  d d l  m } g  } |  j } x| D]} x | j j D] } t | | j  r9 | j d | j d  | j	 | | j j
   | j | j  | j | | j   | j | | j   | j d  | j d  | j	 | | j j
   f  Pq9 q9 Wx | j j D] } | j j s| j d | j d  | j	 | | j     | j d  | j | d   | j | d   | j d  | j d  | j	 | | j     f  qqWq& W| S)Nr   )modelszZ%s setval(pg_get_serial_sequence('%s','%s'), coalesce(max(%s), 1), max(%s) %s null) %s %s;rD   zIS NOTZFROMrC   )Z	django.dbrJ   r0   Z_metaZlocal_fields
isinstanceZ	AutoFieldrF   r=   rG   Zdb_tabler8   rB   Zmany_to_manyZremote_fieldZthroughZm2m_db_table)r   r:   Z
model_listrJ   outputqnmodelfr   r   r   sequence_reset_sql   s<    	 +z%DatabaseOperations.sequence_reset_sqlc             C   s   | S)Nr   )r   xr   r   r   prep_for_iexact_query   s    z(DatabaseOperations.prep_for_iexact_queryc             C   s   d S)a  
        Returns the maximum length of an identifier.

        Note that the maximum length of an identifier is 63 by default, but can
        be changed by recompiling PostgreSQL after editing the NAMEDATALEN
        macro in src/include/pg_config_manual.h .

        This implementation simply returns 63, but can easily be overridden by a
        custom database backend that inherits most of its behavior from this one.
        ?   r   )r   r   r   r   max_name_length   s    z"DatabaseOperations.max_name_lengthc             C   s   | r d d j  |  Sd Sd  S)NzDISTINCT ON (%s)z, ZDISTINCT)r<   )r   fieldsr   r   r   distinct_sql   s    zDatabaseOperations.distinct_sqlc             C   s#   | j  d  k	 r | j  j d  Sd  S)Nzutf-8)querydecode)r   r"   r   r   r   r   r   last_executed_query   s    z&DatabaseOperations.last_executed_queryc             C   s
   d f  f S)NzRETURNING %sr   )r   r   r   r   return_insert_id   s    z#DatabaseOperations.return_insert_idc             C   s7   d d   | D } d j  d d   | D  } d | S)Nc             s   s   |  ] } d  j  |  Vq d S)z, N)r<   )r   rowr   r   r   r;      s    z5DatabaseOperations.bulk_insert_sql.<locals>.<genexpr>z, c             s   s   |  ] } d  | Vq d S)z(%s)Nr   )r   r   r   r   r   r;      s    zVALUES )r<   )r   rU   Zplaceholder_rowsZplaceholder_rows_sqlZ
values_sqlr   r   r   bulk_insert_sql   s    z"DatabaseOperations.bulk_insert_sqlc             C   s   | S)Nr   )r   valuer   r   r   adapt_datefield_value   s    z(DatabaseOperations.adapt_datefield_valuec             C   s   | S)Nr   )r   r]   r   r   r   adapt_datetimefield_value   s    z,DatabaseOperations.adapt_datetimefield_valuec             C   s   | S)Nr   )r   r]   r   r   r   adapt_timefield_value   s    z(DatabaseOperations.adapt_timefield_valuec             C   s   | r t  |  Sd  S)N)r   )r   r]   r   r   r   adapt_ipaddressfield_value   s    
z-DatabaseOperations.adapt_ipaddressfield_valuec                sX   | d k r< | \ } } | \ } } d | | f | | f St  t |   j | | |  S)NZ	DateFieldzage(%s, %s))superr   subtract_temporals)r   r   ZlhsZrhsZlhs_sqlZ
lhs_paramsZrhs_sqlZ
rhs_params)	__class__r   r   rc      s
    z%DatabaseOperations.subtract_temporalsc             C   s   t  d   d  S)NzTAdd 'django.contrib.postgres' to settings.INSTALLED_APPS to use the search operator.)NotImplementedError)r   r   r   r   r   fulltext_search_sql  s    z&DatabaseOperations.fulltext_search_sql)"__name__
__module____qualname__r   r   r   r   r   r   r   r   r#   r.   r2   r3   r4   r0   r7   rA   r?   rI   rP   rR   rT   rV   rY   rZ   r\   r^   r_   r`   ra   rc   rf   r   r   )rd   r   r   	   s>   ,r   N)	
__future__r   Zpsycopg2.extrasr   Zdjango.confr   Z"django.db.backends.base.operationsr   r   r   r   r   r   <module>   s   