o
    eaC                     @   s   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
 d dlmZ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mZmZ d dlmZ G dd deZdS )    N)	lru_cache)chain)settings)
FieldError)DatabaseErrorNotSupportedErrormodels)BaseDatabaseOperations)
OnConflict)Col)timezone)
parse_dateparse_datetime
parse_time)cached_propertyc                       s  e Zd ZdZdddZdZeg dZdd Zdd	 Z	d
d Z
dd Zdd ZdWddZdWd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$ Zd%d& Zd'd( Zd)d* Zd+d, Zed-d. Zd/d/d0d1d2Zd3d4 Zd5d6 Zd7d8 Z  fd9d:Z!d;d< Z"d=d> Z#d?d@ Z$dAdB Z%dCdD Z&dEdF Z'dGdH Z( fdIdJZ)dKdL Z*dMdN Z+dOdP Z,dW fdQdR	Z-dSdT Z. fdUdVZ/  Z0S )XDatabaseOperationstextTEXT)	DateFieldDateTimeFieldzEXPLAIN QUERY PLAN)nullfalsetruec                 C   s6   t |dkrdS t |dkr| jjjt | S t |S )z
        SQLite has a compile-time default (SQLITE_LIMIT_VARIABLE_NUMBER) of
        999 variables per query.

        If there's only a single field to insert, the limit is 500
        (SQLITE_MAX_COMPOUND_SELECT).
           i  )len
connectionfeaturesmax_query_params)selffieldsobjs r!   X/var/www/html/venv/lib/python3.10/site-packages/django/db/backends/sqlite3/operations.pybulk_batch_size   s
   z"DatabaseOperations.bulk_batch_sizec              
   C   s   t jt jt jf}t jt jt jt jf}t||r8|	 D ]}z|j
}W n ttfy-   Y qw t||r7tdqt|t jrL|jrNt|jdkrPtdd S d S d S )Nz{You cannot use Sum, Avg, StdDev, and Variance aggregations on date/time fields in sqlite3 since date/time is saved as text.r   zTSQLite doesn't support DISTINCT on aggregate functions accepting multiple arguments.)r   r   r   	TimeFieldSumAvgVarianceStdDev
isinstanceget_source_expressionsoutput_fieldAttributeErrorr   r   	Aggregatedistinctr   source_expressions)r   
expression
bad_fieldsbad_aggregatesexprr+   r!   r!   r"   check_expression_support,   s0   



z+DatabaseOperations.check_expression_supportc                 C      d| d|  g|R fS )z
        Support EXTRACT with a user-defined function django_date_extract()
        that's registered in connect(). Use single quotes because this is a
        string and could otherwise cause a collision with a field name.
        zdjango_date_extract(%s, )lowerr   lookup_typesqlparamsr!   r!   r"   date_extract_sqlH   s   z#DatabaseOperations.date_extract_sqlc                 C   s   |  S )z
        Given a cursor object that has just performed an INSERT...RETURNING
        statement into a table, return the list of returned data.
        )fetchall)r   cursorr!   r!   r"   fetch_returned_insert_rowsP   s   z-DatabaseOperations.fetch_returned_insert_rowsc                 C   s   |S )z>Do nothing since formatting is handled in the custom function.r!   )r   r;   r!   r!   r"   format_for_duration_arithmeticW   s   z1DatabaseOperations.format_for_duration_arithmeticNc                 C   &   d| d|  g|| |R fS )Nzdjango_date_trunc(%s, 	, %s, %s)r8   _convert_tznames_to_sqlr   r:   r;   r<   tznamer!   r!   r"   date_trunc_sql[      
z!DatabaseOperations.date_trunc_sqlc                 C   rB   )Nzdjango_time_trunc(%s, rC   rD   rF   r!   r!   r"   time_trunc_sqlb   rI   z!DatabaseOperations.time_trunc_sqlc                 C   s   |rt jr|| jjfS dS )N)NN)r   USE_TZr   timezone_name)r   rG   r!   r!   r"   rE   i   s   
z*DatabaseOperations._convert_tznames_to_sqlc                 C       d| dg ||  |R fS )Nzdjango_datetime_cast_date(rC   rE   r   r;   r<   rG   r!   r!   r"   datetime_cast_date_sqln   
   z)DatabaseOperations.datetime_cast_date_sqlc                 C   rM   )Nzdjango_datetime_cast_time(rC   rN   rO   r!   r!   r"   datetime_cast_time_sqlt   rQ   z)DatabaseOperations.datetime_cast_time_sqlc                 C   rB   )Nzdjango_datetime_extract(%s, rC   rD   rF   r!   r!   r"   datetime_extract_sqlz   rI   z'DatabaseOperations.datetime_extract_sqlc                 C   rB   )Nzdjango_datetime_trunc(%s, rC   rD   rF   r!   r!   r"   datetime_trunc_sql   rI   z%DatabaseOperations.datetime_trunc_sqlc                 C   r5   )Nzdjango_time_extract(%s, r6   r7   r9   r!   r!   r"   time_extract_sql   s   z#DatabaseOperations.time_extract_sqlc                 C      dS )NNULLr!   r   r!   r!   r"   pk_default_value      z#DatabaseOperations.pk_default_valuec                 C   s   d}t ||kr&d}tdt ||D ]}||||  }|| |7 }q|S dddgt |  }| jj }z||| W |  S |  w )zV
        Only for last_executed_query! Don't use this to execute SQL queries!
        i  r!   r   zSELECT , zQUOTE(?))	r   range%_quote_params_for_last_executed_queryjoinr   r?   executefetchoneclose)r   r<   
BATCH_SIZEresultsindexchunkr;   r?   r!   r!   r"   r]      s   	z8DatabaseOperations._quote_params_for_last_executed_queryc                 C   sT   |r(t |ttfr| |}|| S t| }| |}tt||}|| S |S N)r)   listtupler]   valuesdictzip)r   r?   r;   r<   ri   r!   r!   r"   last_executed_query   s   

z&DatabaseOperations.last_executed_queryc                 C   s    | dr|dr|S d| S )N"z"%s")
startswithendswith)r   namer!   r!   r"   
quote_name   s   zDatabaseOperations.quote_namec                 C   rV   )Nr!   rX   r!   r!   r"   no_limit_value   rZ   z!DatabaseOperations.no_limit_valuec                 C   sZ   d}|ddf}| j  }|||}dd | D W  d    S 1 s&w   Y  d S )Nz
        WITH tables AS (
            SELECT %s name
            UNION
            SELECT sqlite_master.name
            FROM sqlite_master
            JOIN tables ON (sql REGEXP %s || tables.name || %s)
        ) SELECT name FROM tables;
        z(?i)\s+references\s+("|\')?z("|\')?\s*\(c                 S   s   g | ]}|d  qS )r   r!   .0rowr!   r!   r"   
<listcomp>       z9DatabaseOperations.__references_graph.<locals>.<listcomp>)r   r?   r_   r>   )r   
table_namequeryr<   r?   rc   r!   r!   r"   __references_graph   s   
$z%DatabaseOperations.__references_graphc                 C   s   t dd| jS )Ni   )maxsize)r   %_DatabaseOperations__references_graphrX   r!   r!   r"   _references_graph   s   z$DatabaseOperations._references_graphF)reset_sequencesallow_cascadec                   s`   |r|rt t fdd|D } fdd|D }|r.dd |D }| | |S )Nc                 3   s    | ]}  |V  qd S rf   )r~   ru   tablerX   r!   r"   	<genexpr>       z/DatabaseOperations.sql_flush.<locals>.<genexpr>c              
      s2   g | ]}d  d d |f qS )z	%s %s %s;DELETEFROM)SQL_KEYWORD	SQL_FIELDrq   r   r   styler!   r"   rw      s    z0DatabaseOperations.sql_flush.<locals>.<listcomp>c                 S   s   g | ]}d |iqS )r   r!   r   r!   r!   r"   rw      rx   )setr   from_iterableextendsequence_reset_by_name_sql)r   r   tablesr   r   r;   	sequencesr!   r   r"   	sql_flush   s   	zDatabaseOperations.sql_flushc                 C   sn   |sg S d| d|| d| d|| d| d|| d| dd	d
d |D f gS )Nz%s %s %s %s = 0 %s %s %s (%s);UPDATEsqlite_sequenceSETseqWHERErp   INr[   c                 S   s   g | ]}d |d  qS )'%s'r   r!   )ru   sequence_infor!   r!   r"   rw      s    zADatabaseOperations.sequence_reset_by_name_sql.<locals>.<listcomp>)r   	SQL_TABLErq   r   r^   )r   r   r   r!   r!   r"   r      s    z-DatabaseOperations.sequence_reset_by_name_sqlc                 C   sR   |d u rd S t |dr|S t|r%tjr!t|| jj}t|S tdt|S )Nresolve_expressionzNSQLite backend does not support timezone-aware datetimes when USE_TZ is False.)	hasattrr   is_awarer   rK   
make_naiver   
ValueErrorstrr   valuer!   r!   r"   adapt_datetimefield_value  s   

z,DatabaseOperations.adapt_datetimefield_valuec                 C   s4   |d u rd S t |dr|S t|rtdt|S )Nr   z5SQLite backend does not support timezone-aware times.)r   r   r   r   r   r   r!   r!   r"   adapt_timefield_value  s   

z(DatabaseOperations.adapt_timefield_valuec                    s   t  |}|j }|dkr|| j |S |dkr#|| j |S |dkr/|| j |S |dkr=|| | |S |dkrI|| j	 |S |dkrS|| j
 |S )Nr   r   r$   DecimalField	UUIDFieldBooleanField)superget_db_convertersr+   get_internal_typeappendconvert_datetimefield_valueconvert_datefield_valueconvert_timefield_valueget_decimalfield_converterconvert_uuidfield_valueconvert_booleanfield_value)r   r0   
convertersinternal_type	__class__r!   r"   r   &  s(   
	z$DatabaseOperations.get_db_convertersc                 C   s@   |d urt |tjst|}tjrt|st|| jj}|S rf   )	r)   datetimer   r   rK   r   r   
make_awarer   r   r   r0   r   r!   r!   r"   r   7  s   z.DatabaseOperations.convert_datetimefield_valuec                 C       |d urt |tjst|}|S rf   )r)   r   dater   r   r!   r!   r"   r   ?     z*DatabaseOperations.convert_datefield_valuec                 C   r   rf   )r)   r   timer   r   r!   r!   r"   r   E  r   z*DatabaseOperations.convert_timefield_valuec                    sP   t jddj t|tr t d|jj  fdd}|S  fdd}|S )N   )precr   c                    s"   | d ur | j |jjdS d S )N)context)quantizer+   r   r   r0   r   create_decimalquantize_valuer!   r"   	converterT  s
   z@DatabaseOperations.get_decimalfield_converter.<locals>.converterc                    s   | d ur | S d S rf   r!   r   )r   r!   r"   r   \  s   )	decimalContextcreate_decimal_from_floatr)   r   Decimalscalebr+   decimal_places)r   r0   r   r!   r   r"   r   K  s   

z-DatabaseOperations.get_decimalfield_converterc                 C   s   |d ur	t |}|S rf   )uuidUUIDr   r!   r!   r"   r   b  s   
z*DatabaseOperations.convert_uuidfield_valuec                 C   s   |dv rt |S |S )N)r   r   )boolr   r!   r!   r"   r   g  s   z-DatabaseOperations.convert_booleanfield_valuec                 C   s,   dd |D }d dd |D }d| S )Nc                 s   s    | ]}d  |V  qdS )r[   Nr^   rt   r!   r!   r"   r   k  r   z5DatabaseOperations.bulk_insert_sql.<locals>.<genexpr>r[   c                 s   s    | ]	}d | dV  qdS )(r6   Nr!   )ru   r;   r!   r!   r"   r   l  s    zVALUES r   )r   r   placeholder_rowsplaceholder_rows_sql
values_sqlr!   r!   r"   bulk_insert_sqlj  s   
z"DatabaseOperations.bulk_insert_sqlc                    s:   |dkrdd | S |dkrdd | S t ||S )N^z	POWER(%s),#z
BITXOR(%s))r^   r   combine_expression)r   	connectorsub_expressionsr   r!   r"   r   o  s
   z%DatabaseOperations.combine_expressionc                 C   sD   |dvr
t d| d| g| }t|dkrtddd| S )N)+-*/z$Invalid connector for timedelta: %s.r      z)Too many params for timedelta operations.zdjango_format_dtdelta(%s)r[   )r   r   r   r^   )r   r   r   	fn_paramsr!   r!   r"   combine_duration_expressionx  s   z.DatabaseOperations.combine_duration_expressionc                 C   s   |dv rdS dS )N)PositiveBigIntegerFieldPositiveIntegerFieldPositiveSmallIntegerField)r       )l         r   r!   )r   r   r!   r!   r"   integer_field_range  s   z&DatabaseOperations.integer_field_rangec           	      C   sF   |\}}|\}}g ||R }|dkrd||f |fS d||f |fS )Nr$   zdjango_time_diff(%s, %s)zdjango_timestamp_diff(%s, %s)r!   )	r   r   lhsrhslhs_sql
lhs_paramsrhs_sql
rhs_paramsr<   r!   r!   r"   subtract_temporals  s   z%DatabaseOperations.subtract_temporalsc                    s   |t jkrdS t j|dS )NzINSERT OR IGNORE INTO)on_conflict)r
   IGNOREr   insert_statement)r   r   r   r!   r"   r     s   
z#DatabaseOperations.insert_statementc                    s,   |sdS  fdd|D }dd | dfS )N) r!   c                    s,   g | ]}d   |jjj  |jf qS )z%s.%s)rq   model_metadb_tablecolumnru   fieldrX   r!   r"   rw     s    
z<DatabaseOperations.return_insert_columns.<locals>.<listcomp>zRETURNING %sr[   r!   r   )r   r   columnsr!   rX   r"   return_insert_columns  s   
z(DatabaseOperations.return_insert_columnsc                    sX   |t jkr#| jjjr#ddt| j|ddd t| j|D f S t 	||||S )Nz ON CONFLICT(%s) DO UPDATE SET %sr[   c                 S   s   g | ]	}| d | qS )z = EXCLUDED.r!   r   r!   r!   r"   rw     s    z=DatabaseOperations.on_conflict_suffix_sql.<locals>.<listcomp>)
r
   r   r   r   %supports_update_conflicts_with_targetr^   maprq   r   on_conflict_suffix_sql)r   r   r   update_fieldsunique_fieldsr   r!   r"   r     s"   

	z)DatabaseOperations.on_conflict_suffix_sqlrf   )1__name__
__module____qualname__"cast_char_field_without_max_lengthcast_data_typesexplain_prefix	frozensetjsonfield_datatype_valuesr#   r4   r=   r@   rA   rH   rJ   rE   rP   rR   rS   rT   rU   rY   r]   rl   rq   rs   r}   r   r~   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   __classcell__r!   r!   r   r"   r      s^    


	r   )r   r   r   	functoolsr   	itertoolsr   django.confr   django.core.exceptionsr   	django.dbr   r   r   "django.db.backends.base.operationsr	   django.db.models.constantsr
   django.db.models.expressionsr   django.utilsr   django.utils.dateparser   r   r   django.utils.functionalr   r   r!   r!   r!   r"   <module>   s    