o
    <g8                     @   sD   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ZdS )    )BaseDatabaseSchemaEditor)IndexColumns)sql)strip_quotesc                       s  e Zd ZdZdZdZdZdZdZdZ	dZ
d	Zd
Zd2 fdd	ZdZdZdd Z fddZdd Zdd Zdd Zdd Zdd Z fddZ	 d3 fd!d"	Z fd#d$Zd3d%d&Zd3d'd(Zd4 fd*d+	Zd)d)d,d,d)dd)dd)d d)d)d- fd.d/
Zd0d1 Z  ZS )5DatabaseSchemaEditorzeUPDATE %(table)s SET %(column)s = %(default)s WHERE %(column)s IS NULL; SET CONSTRAINTS ALL IMMEDIATEz1ALTER SEQUENCE IF EXISTS %(sequence)s AS %(type)sz,DROP SEQUENCE IF EXISTS %(sequence)s CASCADEzZCREATE INDEX %(name)s ON %(table)s%(using)s (%(columns)s)%(include)s%(extra)s%(condition)szgCREATE INDEX CONCURRENTLY %(name)s ON %(table)s%(using)s (%(columns)s)%(include)s%(extra)s%(condition)szDROP INDEX IF EXISTS %(name)sz*DROP INDEX CONCURRENTLY IF EXISTS %(name)szyCONSTRAINT %(name)s REFERENCES %(to_table)s(%(to_column)s)%(deferrable)s; SET CONSTRAINTS %(namespace)s%(name)s IMMEDIATEzRSET CONSTRAINTS %(name)s IMMEDIATE; ALTER TABLE %(table)s DROP CONSTRAINT %(name)sz,DROP FUNCTION %(procedure)s(%(param_types)s) c                    s8   |d u rt  ||S | jjt||}t  |d S N)superexecute
connectionopscompose_sqlstr)selfr   params	__class__r   W/var/www/html/venv/lib/python3.10/site-packages/django/db/backends/postgresql/schema.pyr
   *   s   zDatabaseSchemaEditor.executezRALTER TABLE %(table)s ALTER COLUMN %(column)s ADD GENERATED BY DEFAULT AS IDENTITYzEALTER TABLE %(table)s ALTER COLUMN %(column)s DROP IDENTITY IF EXISTSc                 C   s   t || jjS r   )r   quoter   )r   valuer   r   r   quote_value:   s   z DatabaseSchemaEditor.quote_valuec                    s0   t  ||}| ||}|d ur|| |S r   )r	   _field_indexes_sql_create_like_index_sqlappend)r   modelfieldoutputlike_index_statementr   r   r   r   =   s
   
z'DatabaseSchemaEditor._field_indexes_sqlc                 C   s.   |j r	|| jS | jj| || jS r   )is_relationrel_db_typer   
data_typesgetget_internal_typedb_typer   r   r   r   r   _field_data_typeD   s   
z%DatabaseSchemaEditor._field_data_typec                 c   s8    |j  dkr| |j E d H  d S | |j V  d S )N
ArrayField)
base_fieldr"   _field_base_data_typesr%   r$   r   r   r   r(   L   s   z+DatabaseSchemaEditor._field_base_data_typesc                 C   s   |j | jd}|durR|js|jrRd|v rdS t|dd}|s)|jr)t|jdd}|r2| |s2dS |drB| j	||gddgdS |d	rR| j	||gdd
gdS dS )z
        Return the statement to create an index with varchar operator pattern
        when the column type is 'varchar' or 'text', otherwise return None.
        r   N[db_collationvarchar_likevarchar_pattern_ops)fieldssuffix	opclassestexttext_pattern_ops)
r#   r   db_indexuniquegetattrr   target_field_is_collation_deterministic
startswith_create_index_sql)r   r   r   r#   collation_namer   r   r   r   S   s0   


z+DatabaseSchemaEditor._create_like_index_sqlc                 C   sd   d}|  }|  }|dkr$||kr$t| |t| |kr"|S dS | || |kr0|S dS )Nz USING %(column)s::%(type)sr&    )r"   listr(   r%   )r   	new_field	old_field	using_sqlnew_internal_typeold_internal_typer   r   r   
_using_sqlz   s   zDatabaseSchemaEditor._using_sqlc                 C   sl   | j  '}| j j||D ]}|d |kr#|d   W  d    S qW d    d S 1 s/w   Y  d S )Ncolumnname)r   cursorintrospectionget_sequences)r   tablerD   rF   sequencer   r   r   _get_sequence_name   s   

z'DatabaseSchemaEditor._get_sequence_namec                    sT  |j | jd}|d }|js|jrD|dr|dr/|dr%|dr/|drD|dsD| j|jj|jgdd}	| 	| 
||	 d| _| || }
rV|  j|
7  _| }| }t|jj}h d	}||v }||v }|r|st|j}| j| ||d
d g f| j| || |d g fgfS |r|s| 	| j| || t|jd  t|j}t ||||||\}}g }| || }r| jd| |i g fg}||fS |r|r||krt ||||||\}}t|j}dddd}g }| || }r| j| ||| d g fg}||fS t ||||||S )Nr)   typer,   r2   citextr-   r0   z2ALTER COLUMN %(column)s TYPE %(type)s%(collation)s>   	AutoFieldBigAutoFieldSmallAutoFieldr<   )rD   rL   	collation)rI   rD   rJ   integerbigintsmallint)rO   rP   rQ   )rJ   rL   )db_parametersr   r4   r5   r9   _create_index_name_metadb_tablerD   r
   _delete_index_sqlsql_alter_column_typerC   r"   r   
quote_namesql_add_identitysql_drop_indentityr	   _alter_column_type_sqlrK   sql_delete_sequencesql_alter_sequence_type)r   r   r?   r>   new_typeold_collationnew_collationold_db_paramsold_type
index_namer@   rA   rB   rI   auto_field_typesold_is_autonew_is_autorD   fragment_other_actionssequence_namedb_typesr   r   r   r_      s   


	

z+DatabaseSchemaEditor._alter_column_type_sqlFc	              
      s   t  |||||||| |js|js|js|js+|jr+| ||}	|	d ur+| |	 |jrK|jsM|jsO| j|jj|j	gdd}
| | 
||
 d S d S d S d S )Nr-   rN   )r	   _alter_fieldr4   r5   r   r
   rW   rX   rY   rD   rZ   )r   r   r?   r>   rf   rb   re   new_db_paramsstrictr   index_to_remover   r   r   rp     s0   
z!DatabaseSchemaEditor._alter_fieldc                    s*   |rt ||| j||dS t ||||S )N)col_suffixesr1   )r   r\   r	   _index_columns)r   rI   columnsrt   r1   r   r   r   ru   &  s   z#DatabaseSchemaEditor._index_columnsc                 C   s   | j |j|| |dd d d S )Nconcurrently)r   )r
   
create_sqlr   r   indexrx   r   r   r   	add_index1  s   
zDatabaseSchemaEditor.add_indexc                 C   s   |  |j|| |d d S )Nrw   )r
   
remove_sqlrz   r   r   r   remove_index6  s   z!DatabaseSchemaEditor.remove_indexNc                    s    |r| j n| j}t |||S r   )sql_delete_index_concurrentlysql_delete_indexr	   rZ   )r   r   rE   r   rx   r   r   r   rZ   9  s
   z&DatabaseSchemaEditor._delete_index_sqlr<   )r/   rE   r0   usingdb_tablespacert   r   r1   	conditionrx   includeexpressionsc                   s8   |p	|s| j n| j}t j|||||||||	|
||dS )N)r/   rE   r0   r   r   rt   r   r1   r   r   r   )sql_create_indexsql_create_index_concurrentlyr	   r:   )r   r   r/   rE   r0   r   r   rt   r   r1   r   rx   r   r   r   r   r   r:   A  s&   z&DatabaseSchemaEditor._create_index_sqlc                 C   sT   | j  }|d|g | }|r|d nd W  d    S 1 s#w   Y  d S )Nz
                SELECT collisdeterministic
                FROM pg_collation
                WHERE collname = %s
                r   )r   rF   r
   fetchone)r   r;   rF   rowr   r   r   r8   f  s   $z0DatabaseSchemaEditor._is_collation_deterministic)r   )F)NF) __name__
__module____qualname__sql_update_with_defaultra   r`   r   r   r   r   sql_create_column_inline_fksql_delete_fksql_delete_procedurer
   r]   r^   r   r   r%   r(   r   rC   rK   r_   rp   ru   r|   r~   rZ   r:   r8   __classcell__r   r   r   r   r      sb    	'|$

%r   N)	django.db.backends.base.schemar   !django.db.backends.ddl_referencesr   )django.db.backends.postgresql.psycopg_anyr   django.db.backends.utilsr   r   r   r   r   r   <module>   s
    