U
    }®cÏ,  ã                   @   s8   d dl mZ d dlmZ d dlmZ G dd„ deƒZdS )é    ©ÚInet)Úsettings)ÚBaseDatabaseOperationsc                       s^  e Zd ZdZdZddddœZdd„ Zd	d
„ ZdPdd„Zdd„ Z	dd„ Z
dd„ Zdd„ Zdd„ Zdd„ ZdQdd„Zdd„ Zdd„ ZdRd d!„Zd"d#„ Zd$d%„ Zd&d'„ Zd(d)„ Zd*d*d+œd,d-„Zd.d/„ ZdSd0d1„Zd2d3„ Zd4d5„ Zd6d7„ Zd8d9„ Zd:d;„ Zd<d=„ Zd>d?„ Z d@dA„ Z!dBdC„ Z"dDdE„ Z#dTdFdG„Z$dHdI„ Z%‡ fdJdK„Z&dU‡ fdLdM„	Z'dV‡ fdNdO„	Z(‡  Z)S )WÚDatabaseOperationsZvarcharZEXPLAINÚintegerZbigintZsmallint)Ú	AutoFieldZBigAutoFieldZSmallAutoFieldc                 C   s.   |  ¡ }|dkr*d| | j¡ d¡d  S dS )N)ÚGenericIPAddressFieldÚIPAddressFieldZ	TimeFieldZ	UUIDFieldzCAST(%%s AS %s)ú(r   ú%s)Zget_internal_typeZdb_typeÚ
connectionÚsplit)ÚselfZoutput_fieldÚinternal_type© r   úL/tmp/pip-unpacked-wheel-7m9rsep5/django/db/backends/postgresql/operations.pyÚunification_cast_sql   s    z'DatabaseOperations.unification_cast_sqlc                 C   s@   |dkrd| S |dkr d| S |dkr0d| S d||f S d S )NZweek_dayzEXTRACT('dow' FROM %s) + 1Ziso_week_dayzEXTRACT('isodow' FROM %s)Ziso_yearzEXTRACT('isoyear' FROM %s)zEXTRACT('%s' FROM %s)r   )r   Úlookup_typeÚ
field_namer   r   r   Údate_extract_sql   s    z#DatabaseOperations.date_extract_sqlNc                 C   s   |   ||¡}d||f S ©NzDATE_TRUNC('%s', %s)©Ú_convert_field_to_tz©r   r   r   Útznamer   r   r   Údate_trunc_sql)   s    z!DatabaseOperations.date_trunc_sqlc                 C   s,   d|kr|  dd¡S d|kr(|  dd¡S |S )Nú+ú-)Úreplace)r   r   r   r   r   Ú_prepare_tzname_delta.   s
    z(DatabaseOperations._prepare_tzname_deltac                 C   s    |rt jrd||  |¡f }|S )Nz%s AT TIME ZONE '%s')r   ZUSE_TZr    ©r   r   r   r   r   r   r   5   s    
z'DatabaseOperations._convert_field_to_tzc                 C   s   |   ||¡}d| S )Nz
(%s)::dater   r!   r   r   r   Údatetime_cast_date_sql:   s    z)DatabaseOperations.datetime_cast_date_sqlc                 C   s   |   ||¡}d| S )Nz
(%s)::timer   r!   r   r   r   Údatetime_cast_time_sql>   s    z)DatabaseOperations.datetime_cast_time_sqlc                 C   s   |   ||¡}|  ||¡S ©N)r   r   r   r   r   r   Údatetime_extract_sqlB   s    z'DatabaseOperations.datetime_extract_sqlc                 C   s   |   ||¡}d||f S r   r   r   r   r   r   Údatetime_trunc_sqlF   s    z%DatabaseOperations.datetime_trunc_sqlc                 C   s   |   ||¡}d||f S )NzDATE_TRUNC('%s', %s)::timer   r   r   r   r   Útime_trunc_sqlK   s    z!DatabaseOperations.time_trunc_sqlc                 C   s   dS )Nz DEFERRABLE INITIALLY DEFERREDr   ©r   r   r   r   Údeferrable_sqlO   s    z!DatabaseOperations.deferrable_sqlc                 C   s   |  ¡ S )z˜
        Given a cursor object that has just performed an INSERT...RETURNING
        statement into a table, return the tuple of returned data.
        )Zfetchall)r   Úcursorr   r   r   Úfetch_returned_insert_rowsR   s    z-DatabaseOperations.fetch_returned_insert_rowsc                 C   s@   d}|dkr,|dkrd}n|dkr(d}nd}|dkr<d	| }|S )
Nr   )	ÚiexactÚcontainsÚ	icontainsÚ
startswithÚistartswithÚendswithÚ	iendswithÚregexZiregex)r
   r	   zHOST(%s))ZCICharFieldZCIEmailFieldZCITextFieldz
%s::citextz%s::text)r,   r.   r0   r2   z	UPPER(%s)r   )r   r   r   Úlookupr   r   r   Úlookup_castY   s    zDatabaseOperations.lookup_castc                 C   s   d S r$   r   r(   r   r   r   Úno_limit_valuel   s    z!DatabaseOperations.no_limit_valuec                 C   s   |gS r$   r   )r   Úsqlr   r   r   Úprepare_sql_scripto   s    z%DatabaseOperations.prepare_sql_scriptc                 C   s    |  d¡r| d¡r|S d| S )Nú"z"%s")r/   r1   )r   Únamer   r   r   Ú
quote_namer   s    zDatabaseOperations.quote_namec                 C   s   dS )NzSET TIME ZONE %sr   r(   r   r   r   Úset_time_zone_sqlw   s    z$DatabaseOperations.set_time_zone_sqlF)Úreset_sequencesÚallow_cascadec                   sd   |sg S ˆ  d¡d ‡ ‡fdd„|D ƒ¡g}|r@| ˆ  d¡¡ |rT| ˆ  d¡¡ dd |¡ gS )	NZTRUNCATEú, c                 3   s   | ]}ˆ  ˆ  |¡¡V  qd S r$   )Ú	SQL_FIELDr;   )Ú.0Útable©r   Ústyler   r   Ú	<genexpr>‚   s     z/DatabaseOperations.sql_flush.<locals>.<genexpr>zRESTART IDENTITYZCASCADEz%s;ú )ÚSQL_KEYWORDÚjoinÚappend)r   rD   Ztablesr=   r>   Z	sql_partsr   rC   r   Ú	sql_flushz   s    þzDatabaseOperations.sql_flushc              
   C   sR   g }|D ]D}|d }|d pd}|  d| d¡| |  |¡¡| |¡f ¡ q|S )NrB   ÚcolumnÚidz7%s setval(pg_get_serial_sequence('%s','%s'), 1, false);ÚSELECT)rI   rG   Ú	SQL_TABLEr;   r@   )r   rD   Ú	sequencesr7   Zsequence_infoZ
table_nameZcolumn_namer   r   r   Úsequence_reset_by_name_sqlŠ   s    ý
z-DatabaseOperations.sequence_reset_by_name_sqlc                 C   s$   |rd|   |¡ S d|   |¡ S d S )NzUSING INDEX TABLESPACE %szTABLESPACE %s)r;   )r   Z
tablespaceÚinliner   r   r   Útablespace_sqlš   s    z!DatabaseOperations.tablespace_sqlc                 C   s®   ddl m} g }| j}|D ]Ž}|jjD ]€}t||jƒr&| d| d¡| 	||jj
ƒ¡| |j¡| ||jƒ¡| ||jƒ¡| d¡| d¡| 	||jj
ƒ¡f ¡  qq&q|S )Nr   )ÚmodelszZ%s setval(pg_get_serial_sequence('%s','%s'), coalesce(max(%s), 1), max(%s) %s null) %s %s;rM   zIS NOTZFROM)Z	django.dbrS   r;   Ú_metaZlocal_fieldsÚ
isinstancer   rI   rG   rN   Údb_tabler@   rK   )r   rD   Z
model_listrS   ÚoutputÚqnÚmodelÚfr   r   r   Úsequence_reset_sql    s*    
øÿÿz%DatabaseOperations.sequence_reset_sqlc                 C   s   |S r$   r   )r   Úxr   r   r   Úprep_for_iexact_query½   s    z(DatabaseOperations.prep_for_iexact_queryc                 C   s   dS )a–  
        Return the maximum length of an identifier.

        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 returns 63, but can be overridden by a custom
        database backend that inherits most of its behavior from this one.
        é?   r   r(   r   r   r   Úmax_name_lengthÀ   s    z"DatabaseOperations.max_name_lengthc                 C   s4   |r&dd„ |D ƒ}dd  |¡ g|fS dgg fS d S )Nc                 S   s   g | ]}|D ]}|‘qqS r   r   )rA   Z
param_listÚparamr   r   r   Ú
<listcomp>Ï   s       z3DatabaseOperations.distinct_sql.<locals>.<listcomp>zDISTINCT ON (%s)r?   ZDISTINCT©rH   )r   ÚfieldsÚparamsr   r   r   Údistinct_sqlÍ   s    zDatabaseOperations.distinct_sqlc                 C   s   |j d k	r|j  ¡ S d S r$   )ÚqueryÚdecode)r   r*   r7   rd   r   r   r   Úlast_executed_queryÔ   s    

z&DatabaseOperations.last_executed_queryc                    s,   |sdS ‡ fdd„|D ƒ}dd  |¡ dfS )N)Ú r   c                    s,   g | ]$}d ˆ   |jjj¡ˆ   |j¡f ‘qS )z%s.%s)r;   rY   rT   rV   rK   )rA   Úfieldr(   r   r   ra   Þ   s
   ý
þz<DatabaseOperations.return_insert_columns.<locals>.<listcomp>zRETURNING %sr?   r   rb   )r   rc   Úcolumnsr   r(   r   Úreturn_insert_columnsÛ   s    
üz(DatabaseOperations.return_insert_columnsc                 C   s*   dd„ |D ƒ}d  dd„ |D ƒ¡}d| S )Nc                 s   s   | ]}d   |¡V  qdS )r?   Nrb   )rA   Úrowr   r   r   rE   ç   s     z5DatabaseOperations.bulk_insert_sql.<locals>.<genexpr>r?   c                 s   s   | ]}d | V  qdS )z(%s)Nr   )rA   r7   r   r   r   rE   è   s     zVALUES rb   )r   rc   Zplaceholder_rowsZplaceholder_rows_sqlZ
values_sqlr   r   r   Úbulk_insert_sqlæ   s    z"DatabaseOperations.bulk_insert_sqlc                 C   s   |S r$   r   ©r   Úvaluer   r   r   Úadapt_datefield_valueë   s    z(DatabaseOperations.adapt_datefield_valuec                 C   s   |S r$   r   ro   r   r   r   Úadapt_datetimefield_valueî   s    z,DatabaseOperations.adapt_datetimefield_valuec                 C   s   |S r$   r   ro   r   r   r   Úadapt_timefield_valueñ   s    z(DatabaseOperations.adapt_timefield_valuec                 C   s   |S r$   r   )r   rp   Z
max_digitsZdecimal_placesr   r   r   Úadapt_decimalfield_valueô   s    z+DatabaseOperations.adapt_decimalfield_valuec                 C   s   |rt |ƒS d S r$   r   ro   r   r   r   Úadapt_ipaddressfield_value÷   s    z-DatabaseOperations.adapt_ipaddressfield_valuec           	         s@   |dkr0|\}}|\}}||˜}d||f |fS t ƒ  |||¡S )NZ	DateFieldz(interval '1 day' * (%s - %s)))ÚsuperÚsubtract_temporals)	r   r   ÚlhsÚrhsZlhs_sqlZ
lhs_paramsZrhs_sqlZ
rhs_paramsrd   ©Ú	__class__r   r   rw   ü   s    z%DatabaseOperations.subtract_temporalsc                    s`   t ƒ  |¡}i }|r||d< |r8| dd„ | ¡ D ƒ¡ |r\|dd dd„ | ¡ D ƒ¡ 7 }|S )NZFORMATc                 S   s"   i | ]\}}|  ¡ |rd nd“qS )ÚtrueÚfalse)Úupper)rA   r:   rp   r   r   r   Ú
<dictcomp>
  s   ÿ z;DatabaseOperations.explain_query_prefix.<locals>.<dictcomp>z (%s)r?   c                 s   s   | ]}d | V  qdS )z%s %sNr   )rA   Úir   r   r   rE     s     z:DatabaseOperations.explain_query_prefix.<locals>.<genexpr>)rv   Úexplain_query_prefixÚupdateÚitemsrH   )r   ÚformatÚoptionsÚprefixÚextrarz   r   r   r�     s    
þ z'DatabaseOperations.explain_query_prefixc                    s   |rdS t ƒ  |¡S )NzON CONFLICT DO NOTHING)rv   Úignore_conflicts_suffix_sql)r   Zignore_conflictsrz   r   r   rˆ     s    z.DatabaseOperations.ignore_conflicts_suffix_sql)N)N)N)F)NN)N)N)*Ú__name__Ú
__module__Ú__qualname__Z"cast_char_field_without_max_lengthZexplain_prefixZcast_data_typesr   r   r   r    r   r"   r#   r%   r&   r'   r)   r+   r5   r6   r8   r;   r<   rJ   rP   rR   r[   r]   r_   re   rh   rl   rn   rq   rr   rs   rt   ru   rw   r�   rˆ   Ú__classcell__r   r   rz   r   r      sR   ý




r   N)Zpsycopg2.extrasr   Zdjango.confr   Z"django.db.backends.base.operationsr   r   r   r   r   r   Ú<module>   s   