B
    CVvgè>  ã               @   sL   d dl Z d dlmZ 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    N)Úsettings)ÚBaseDatabaseOperations)Útimezone)Ú	force_strc                   s’  e Zd ZdZejddddœ–Zdddddd	dddd
d
d
ddœZd	ZdZdd„ Z	dXdd„Z
dd„ Zdd„ Zdd„ Zdd„ Zdd„ Zdd„ ZdYdd„Zd d!„ Zd"d#„ Zd$d%„ ZdZd&d'„Zd(d)„ Zd*d+„ Zd,d-„ Zd.d/„ Zd0d0d1œd2d3„Zd4d5„ Zd6d7„ Zd8d9„ Zd:d;„ Zd<d=„ Zd>d?„ Z d@dA„ Z!‡ fdBdC„Z"‡ fdDdE„Z#dFdG„ Z$dHdI„ Z%dJdK„ Z&dLdM„ Z'dNdO„ Z(d[‡ fdPdQ„	Z)dRdS„ Z*d\‡ fdTdU„	Z+d]dVdW„Z,‡  Z-S )^ÚDatabaseOperationsz!django.db.backends.mysql.compiler)r   iÿÿ  )r   l   ÿÿ )r   l   ÿÿÿÿ )ÚPositiveSmallIntegerFieldÚPositiveIntegerFieldÚPositiveBigIntegerFieldzsigned integerzchar(%(max_length)s)z+decimal(%(max_digits)s, %(decimal_places)s)Úcharzunsigned integer)Z	AutoFieldZBigAutoFieldZSmallAutoFieldZ	CharFieldZDecimalFieldZ	TextFieldZIntegerFieldZBigIntegerFieldZSmallIntegerFieldr	   r   r   ZDurationFieldZEXPLAINc             C   sT   |dkrd| S |dkr d| S |dkr0d| S |dkr@d| S d	|  ¡ |f S d S )
NZweek_dayzDAYOFWEEK(%s)Ziso_week_dayzWEEKDAY(%s) + 1ÚweekzWEEK(%s, 3)Ziso_yearz#TRUNCATE(YEARWEEK(%s, 3), -2) / 100zEXTRACT(%s FROM %s))Úupper)ÚselfÚlookup_typeÚ
field_name© r   úG/tmp/pip-install-o3oxmrkh/Django/django/db/backends/mysql/operations.pyÚdate_extract_sql%   s    z#DatabaseOperations.date_extract_sqlNc             C   sf   |   ||¡}dddœ}||kr2|| }d||f S |dkrFd||f S |dkrZd||f S d	| S d S )
Nz	%%Y-01-01z
%%Y-%%m-01)ÚyearÚmonthz#CAST(DATE_FORMAT(%s, '%s') AS DATE)ÚquarterzIMAKEDATE(YEAR(%s), 1) + INTERVAL QUARTER(%s) QUARTER - INTERVAL 1 QUARTERr   z&DATE_SUB(%s, INTERVAL WEEKDAY(%s) DAY)zDATE(%s))Ú_convert_field_to_tz)r   r   r   ÚtznameÚfieldsÚ
format_strr   r   r   Údate_trunc_sql:   s    

z!DatabaseOperations.date_trunc_sqlc             C   s8   d|kr||  d¡d … S d|kr4||  d¡d … S |S )Nú+ú-)Úfind)r   r   r   r   r   Ú_prepare_tzname_deltaN   s
    z(DatabaseOperations._prepare_tzname_deltac             C   s2   |r.t jr.| jj|kr.d|| jj|  |¡f }|S )NzCONVERT_TZ(%s, '%s', '%s'))r   ÚUSE_TZÚ
connectionZtimezone_namer   )r   r   r   r   r   r   r   U   s    z'DatabaseOperations._convert_field_to_tzc             C   s   |   ||¡}d| S )NzDATE(%s))r   )r   r   r   r   r   r   Údatetime_cast_date_sql^   s    z)DatabaseOperations.datetime_cast_date_sqlc             C   s   |   ||¡}d| S )NzTIME(%s))r   )r   r   r   r   r   r   Údatetime_cast_time_sqlb   s    z)DatabaseOperations.datetime_cast_time_sqlc             C   s   |   ||¡}|  ||¡S )N)r   r   )r   r   r   r   r   r   r   Údatetime_extract_sqlf   s    z'DatabaseOperations.datetime_extract_sqlc       
      C   s¦   |   ||¡}ddddddg}d}d}|d	kr8d
j|d�S |dkrLdj|d�S y| |¡d }W n tk
rv   |}Y n,X d |d |… ||d …  ¡}	d||	f }|S )Nr   r   ÚdayÚhourÚminuteÚsecond)z%%Y-z%%mz-%%dz %%H:z%%iz:%%s)z0000-Z01z-01z 00:Z00z:00r   z“CAST(DATE_FORMAT(MAKEDATE(YEAR({field_name}), 1) + INTERVAL QUARTER({field_name}) QUARTER - INTERVAL 1 QUARTER, '%%Y-%%m-01 00:00:00') AS DATETIME))r   r   zqCAST(DATE_FORMAT(DATE_SUB({field_name}, INTERVAL WEEKDAY({field_name}) DAY), '%%Y-%%m-%%d 00:00:00') AS DATETIME)é   Ú z'CAST(DATE_FORMAT(%s, '%s') AS DATETIME))r   ÚformatÚindexÚ
ValueErrorÚjoin)
r   r   r   r   r   r*   Z
format_defÚiÚsqlr   r   r   r   Údatetime_trunc_sqlj   s"    
z%DatabaseOperations.datetime_trunc_sqlc             C   s@   |   ||¡}ddddœ}||kr4|| }d||f S d| S d S )Nz	%%H:00:00z
%%H:%%i:00z%%H:%%i:%%s)r%   r&   r'   z#CAST(DATE_FORMAT(%s, '%s') AS TIME)zTIME(%s))r   )r   r   r   r   r   r   r   r   r   Útime_trunc_sql„   s    z!DatabaseOperations.time_trunc_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_rows‘   s    z-DatabaseOperations.fetch_returned_insert_rowsc             C   s   d| S )NzINTERVAL %s MICROSECONDr   )r   r/   r   r   r   Úformat_for_duration_arithmetic˜   s    z1DatabaseOperations.format_for_duration_arithmeticc             C   s   ddg dffgS )zÅ
        "ORDER BY NULL" prevents MySQL from implicitly ordering by grouped
        columns. If no ordering would otherwise be applied, we don't want any
        implicit sorting going on.
        NÚNULLFr   )r   r   r   r   Úforce_no_ordering›   s    z$DatabaseOperations.force_no_orderingc             C   s   |S )Nr   )r   ÚvalueZ
max_digitsZdecimal_placesr   r   r   Úadapt_decimalfield_value£   s    z+DatabaseOperations.adapt_decimalfield_valuec             C   s   t t|dd ƒdd�S )NZ	_executedÚreplace)Úerrors)r   Úgetattr)r   r2   r/   Úparamsr   r   r   Úlast_executed_query¦   s    z&DatabaseOperations.last_executed_queryc             C   s   dS )Nl   ÿÿÿÿ r   )r   r   r   r   Úno_limit_value­   s    z!DatabaseOperations.no_limit_valuec             C   s    |  d¡r| d¡r|S d| S )Nú`z`%s`)Ú
startswithÚendswith)r   Únamer   r   r   Ú
quote_name±   s    zDatabaseOperations.quote_namec                s,   |sdS ‡ fdd„|D ƒ}dd  |¡ dfS )N)r)   r   c                s,   g | ]$}d ˆ   |jjj¡ˆ   |j¡f ‘qS )z%s.%s)rC   ÚmodelZ_metaZdb_tableÚcolumn)Ú.0Úfield)r   r   r   ú
<listcomp>¼   s   z<DatabaseOperations.return_insert_columns.<locals>.<listcomp>zRETURNING %sz, r   )r-   )r   r   Úcolumnsr   )r   r   Úreturn_insert_columns¶   s
    
z(DatabaseOperations.return_insert_columnsF)Úreset_sequencesÚallow_cascadec               sV   |sg S dg}|r.|  ‡ ‡fdd„|D ƒ¡ n|  ‡ ‡fdd„|D ƒ¡ | d¡ |S )NzSET FOREIGN_KEY_CHECKS = 0;c             3   s,   | ]$}d ˆ  d¡ˆ ˆ  |¡¡f V  qdS )z%s %s;ZTRUNCATEN)ÚSQL_KEYWORDÚ	SQL_FIELDrC   )rF   Ú
table_name)r   Ústyler   r   ú	<genexpr>Ì   s   z/DatabaseOperations.sql_flush.<locals>.<genexpr>c          	   3   s4   | ],}d ˆ  d¡ˆ  d¡ˆ ˆ  |¡¡f V  qdS )z	%s %s %s;ÚDELETEZFROMN)rM   rN   rC   )rF   rO   )r   rP   r   r   rQ   Õ   s   zSET FOREIGN_KEY_CHECKS = 1;)ÚextendÚappend)r   rP   ÚtablesrK   rL   r/   r   )r   rP   r   Ú	sql_flushÃ   s    

zDatabaseOperations.sql_flushc                s   ‡ ‡fdd„|D ƒS )Nc                s>   g | ]6}d ˆ  d¡ˆ  d¡ˆ ˆ  |d ¡¡ˆ d¡f ‘qS )z%s %s %s %s = 1;ZALTERZTABLEÚtableZAUTO_INCREMENT)rM   rN   rC   )rF   Zsequence_info)r   rP   r   r   rH   à   s   zADatabaseOperations.sequence_reset_by_name_sql.<locals>.<listcomp>r   )r   rP   Ú	sequencesr   )r   rP   r   Úsequence_reset_by_name_sqlÞ   s    z-DatabaseOperations.sequence_reset_by_name_sqlc             C   s   |dkr| j jjstdƒ‚|S )Nr   z@The database backend does not accept 0 as a value for AutoField.)r    ÚfeaturesZallows_auto_pk_0r,   )r   r7   r   r   r   Úvalidate_autopk_valueè   s    z(DatabaseOperations.validate_autopk_valuec             C   sL   |d krd S t |dƒr|S t |¡rDtjr<t || jj¡}ntdƒ‚t|ƒS )NÚresolve_expressionzMMySQL backend does not support timezone-aware datetimes when USE_TZ is False.)	Úhasattrr   Úis_awarer   r   Z
make_naiver    r,   Ústr)r   r7   r   r   r   Úadapt_datetimefield_valueð   s    

z,DatabaseOperations.adapt_datetimefield_valuec             C   s4   |d krd S t |dƒr|S t |¡r,tdƒ‚t|ƒS )Nr\   z4MySQL backend does not support timezone-aware times.)r]   r   r^   r,   r_   )r   r7   r   r   r   Úadapt_timefield_value   s    

z(DatabaseOperations.adapt_timefield_valuec             C   s   dS )Né@   r   )r   r   r   r   Úmax_name_length  s    z"DatabaseOperations.max_name_lengthc             C   s   dS )Nr5   r   )r   r   r   r   Úpk_default_value  s    z#DatabaseOperations.pk_default_valuec             C   s*   dd„ |D ƒ}d  dd„ |D ƒ¡}d| S )Nc             s   s   | ]}d   |¡V  qdS )z, N)r-   )rF   Úrowr   r   r   rQ     s    z5DatabaseOperations.bulk_insert_sql.<locals>.<genexpr>z, c             s   s   | ]}d | V  qdS )z(%s)Nr   )rF   r/   r   r   r   rQ     s    zVALUES )r-   )r   r   Zplaceholder_rowsZplaceholder_rows_sqlZ
values_sqlr   r   r   Úbulk_insert_sql  s    z"DatabaseOperations.bulk_insert_sqlc                sh   |dkrdd  |¡ S |dkr<|dkr*dn|}d|  |¡ S |dkrZ|\}}d||d	œ S tƒ  ||¡S )
Nú^zPOW(%s)ú,)ú&ú|z<<ú#rk   zCONVERT(%s, SIGNED)z>>z FLOOR(%(lhs)s / POW(2, %(rhs)s)))ÚlhsÚrhs)r-   ÚsuperÚcombine_expression)r   Z	connectorZsub_expressionsrl   rm   )Ú	__class__r   r   ro     s    z%DatabaseOperations.combine_expressionc                s`   t ƒ  |¡}|j ¡ }|dkr,| | j¡ n0|dkrHtjr\| | j¡ n|dkr\| | j	¡ |S )N)ZBooleanFieldZNullBooleanFieldZDateTimeFieldZ	UUIDField)
rn   Úget_db_convertersZoutput_fieldZget_internal_typerT   Úconvert_booleanfield_valuer   r   Úconvert_datetimefield_valueÚconvert_uuidfield_value)r   Ú
expressionÚ
convertersÚinternal_type)rp   r   r   rq   &  s    
z$DatabaseOperations.get_db_convertersc             C   s   |dkrt |ƒ}|S )N)r   r(   )Úbool)r   r7   ru   r    r   r   r   rr   2  s    z-DatabaseOperations.convert_booleanfield_valuec             C   s   |d k	rt  || jj ¡}|S )N)r   Z
make_awarer    )r   r7   ru   r    r   r   r   rs   7  s    z.DatabaseOperations.convert_datetimefield_valuec             C   s   |d k	rt  |¡}|S )N)ÚuuidÚUUID)r   r7   ru   r    r   r   r   rt   <  s    
z*DatabaseOperations.convert_uuidfield_valuec             C   s   |d k	rt |dƒsdS dS )NZas_sqlz
_binary %sz%s)r]   )r   r7   r   r   r   Úbinary_placeholder_sqlA  s    z)DatabaseOperations.binary_placeholder_sqlc       	      C   st   |\}}|\}}|dkr\| j jr6d||dœ ||˜fS d||dœ t|ƒd t|ƒd  fS ||˜}d||f |fS )NZ	TimeFieldzGCAST((TIME_TO_SEC(%(lhs)s) - TIME_TO_SEC(%(rhs)s)) * 1000000 AS SIGNED))rl   rm   zs((TIME_TO_SEC(%(lhs)s) * 1000000 + MICROSECOND(%(lhs)s)) - (TIME_TO_SEC(%(rhs)s) * 1000000 + MICROSECOND(%(rhs)s)))é   z"TIMESTAMPDIFF(MICROSECOND, %s, %s))r    Úmysql_is_mariadbÚtuple)	r   rw   rl   rm   Zlhs_sqlZ
lhs_paramsZrhs_sqlZ
rhs_paramsr<   r   r   r   Úsubtract_temporalsD  s    

$z%DatabaseOperations.subtract_temporalsc                sŠ   |r|  ¡ dkrd}n|s,d| jjjkr,d}| dd¡}tƒ j|f|Ž}|rj| jjjrj| jjrbdn|d }|r†|rz| jjr†|d| 7 }|S )	NZTEXTZTRADITIONALZTREEÚanalyzeFZANALYZEz ANALYZEz
 FORMAT=%s)	r   r    rZ   Zsupported_explain_formatsÚpoprn   Úexplain_query_prefixZsupports_explain_analyzer}   )r   r*   Úoptionsr€   Úprefix)rp   r   r   r‚   U  s    z'DatabaseOperations.explain_query_prefixc             C   s<   | j jdk s| j jr$|dkr dS dS |dkr0dnd}d| S )N)é   r   r   Úregexz%s REGEXP BINARY %sz%s REGEXP %sÚcr.   zREGEXP_LIKE(%%s, %%s, '%s'))r    Zmysql_versionr}   )r   r   Zmatch_optionr   r   r   Úregex_lookupf  s    zDatabaseOperations.regex_lookupc                s   |rdS t ƒ  |¡S )NzINSERT IGNORE INTO)rn   Úinsert_statement)r   Zignore_conflicts)rp   r   r   r‰   q  s    z#DatabaseOperations.insert_statementc             C   s$   d}|dkr | j js|dkr d}|S )Nz%sZ	JSONField)	ZiexactÚcontainsZ	icontainsr@   ZistartswithrA   Z	iendswithr†   ZiregexzJSON_UNQUOTE(%s))r    r}   )r   r   rw   Úlookupr   r   r   Úlookup_castt  s    
zDatabaseOperations.lookup_cast)N)N)NN)N)F)N).Ú__name__Ú
__module__Ú__qualname__Zcompiler_moduler   Zinteger_field_rangesZcast_data_typesZ"cast_char_field_without_max_lengthZexplain_prefixr   r   r   r   r!   r"   r#   r0   r1   r3   r4   r6   r8   r=   r>   rC   rJ   rV   rY   r[   r`   ra   rc   rd   rf   ro   rq   rr   rs   rt   r{   r   r‚   rˆ   r‰   rŒ   Ú__classcell__r   r   )rp   r   r   	   sp   

	


r   )
ry   Zdjango.confr   Z"django.db.backends.base.operationsr   Zdjango.utilsr   Zdjango.utils.encodingr   r   r   r   r   r   Ú<module>   s
   