U
    }®cS+  ã                   @   s@   d dl 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BaseDatabaseSchemaEditor)ÚIndexColumns)Ústrip_quotesc                       sØ   e Zd ZdZdZdZdZdZdZdZ	dZ
d	Zd
ZdZdd„ Z‡ fdd„Zdd„ Zdd„ Zdd„ Z‡ fdd„Zd)‡ fdd„	Z‡ fdd„Zd*dd„Zd+dd „Zd,‡ fd"d#„	Zd!d!d$d$d!d%d!d%d!dd!d!d&œ‡ fd'd(„
Z‡  ZS )-ÚDatabaseSchemaEditorzCREATE SEQUENCE %(sequence)sz,DROP SEQUENCE IF EXISTS %(sequence)s CASCADEz=SELECT setval('%(sequence)s', MAX(%(column)s)) FROM %(table)sz9ALTER SEQUENCE %(sequence)s OWNED BY %(table)s.%(column)szZCREATE 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                 C   s>   t |tƒr| dd¡}tj |¡}t|dƒr2d|_| ¡  	¡ S )Nú%z%%ÚencodingÚutf8)
Ú
isinstanceÚstrÚreplaceÚpsycopg2Ú
extensionsZadaptÚhasattrr   Z	getquotedÚdecode)ÚselfÚvalueZadapted© r   úH/tmp/pip-unpacked-wheel-7m9rsep5/django/db/backends/postgresql/schema.pyÚquote_value&   s    

z DatabaseSchemaEditor.quote_valuec                    s0   t ƒ  ||¡}|  ||¡}|d k	r,| |¡ |S ©N)ÚsuperÚ_field_indexes_sqlÚ_create_like_index_sqlÚappend)r   ÚmodelÚfieldÚoutputÚlike_index_statement©Ú	__class__r   r   r   /   s
    
z'DatabaseSchemaEditor._field_indexes_sqlc                 C   s.   |j r| | j¡S | jj | ¡ | | j¡¡S r   )Zis_relationZrel_db_typeÚ
connectionÚ
data_typesÚgetÚget_internal_typeÚdb_type©r   r   r   r   r   Ú_field_data_type6   s    
þz%DatabaseSchemaEditor._field_data_typec                 c   s4   |j  ¡ dkr"|  |j ¡E d H  n|  |j ¡V  d S )NÚ
ArrayField)Z
base_fieldr#   Ú_field_base_data_typesr&   r%   r   r   r   r(   >   s    z+DatabaseSchemaEditor._field_base_data_typesc                 C   sr   |j | jd�}|dk	rn|js"|jrnd|kr.dS | d¡rN| j||gddgd�S | d¡rn| 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    Nú[ÚvarcharÚ_likeZvarchar_pattern_ops)ÚfieldsÚsuffixÚ	opclassesÚtextZtext_pattern_ops)r$   r    Údb_indexÚuniqueÚ
startswithÚ_create_index_sql)r   r   r   r$   r   r   r   r   E   s&    
ü
üz+DatabaseSchemaEditor._create_like_index_sqlc                    sþ  d| _ d}| ¡ }| ¡ }|dkrV||krVt|  |¡ƒt|  |¡ƒkrx|  j |7  _ n"|  |¡|  |¡krx|  j |7  _ t|jjƒ}ddddœ}	| ¡ |	k�r†t|j	ƒ}
d||
f }| j |  
|
¡|	| ¡  d	œ g f| jd
|  
|¡i g f| jd
|  
|¡i g f| j|  
|¡| j|  
|
¡d|  
|¡ dœ dœ g f| j|  
|¡|  
|
¡|  
|¡dœ g f| j|  
|¡|  
|
¡|  
|¡dœ g fgfS |j| jd�d |	k�rèt|j	ƒ}
d||
f }tƒ  ||||¡\}}|| jd
|  
|¡i g fgfS tƒ  ||||¡S d S )Nz%ALTER COLUMN %(column)s TYPE %(type)sz USING %(column)s::%(type)sr'   ZbigintÚintegerZsmallint)Z	bigserialÚserialZsmallserialz	%s_%s_seq)ÚcolumnÚtypeÚsequenceznextval('%s'))r7   Údefault)ÚtableÚchanges)r;   r7   r9   r)   r8   )Zsql_alter_column_typer#   Úlistr(   r&   r   Ú_metaÚdb_tableÚlowerr7   Ú
quote_nameÚsql_delete_sequenceÚsql_create_sequenceZsql_alter_columnZsql_alter_column_defaultÚsql_set_sequence_maxÚsql_set_sequence_ownerZdb_parametersr    r   Ú_alter_column_type_sql)r   r   Ú	old_fieldÚ	new_fieldÚnew_typeZ	using_sqlZnew_internal_typeZold_internal_typer;   Zserial_fields_mapr7   Zsequence_nameÚfragmentÚ_r   r   r   rF   e   sŒ    

þû	 ÿü ÿüþþøýú	ýúáø1
 ÿüÿ	z+DatabaseSchemaEditor._alter_column_type_sqlFc	              
      s  |j s|jrr| d¡r | d¡rH| d¡r4| d¡rH| d¡rr| d¡sr| j|jj|jgdd�}	|  |  ||	¡¡ t	ƒ  
||||||||¡ |j sž|jsž|j sª|jsÈ|jrÈ|  ||¡}
|
d k	rÈ|  |
¡ |j�r
|j �s
|j�s
| j|jj|jgdd�}|  |  ||¡¡ d S )Nr+   r0   Zcitextr,   )r.   )r1   r2   r3   Z_create_index_namer>   r?   r7   ÚexecuteÚ_delete_index_sqlr   Ú_alter_fieldr   )r   r   rG   rH   Zold_typerI   Zold_db_paramsZnew_db_paramsÚstrictZ
index_namer   Zindex_to_remover   r   r   rN   ¸   sH    ÿÿþþýý      þÿÿ
z!DatabaseSchemaEditor._alter_fieldc                    s*   |rt ||| j||d�S tƒ  ||||¡S )N)Úcol_suffixesr/   )r   rA   r   Ú_index_columns)r   r;   ÚcolumnsrP   r/   r   r   r   rQ   Ô   s    z#DatabaseSchemaEditor._index_columnsc                 C   s   | j |j|| |d�d d� d S )N©Úconcurrently)Úparams)rL   Z
create_sql©r   r   ÚindexrT   r   r   r   Ú	add_indexÙ   s    zDatabaseSchemaEditor.add_indexc                 C   s   |   |j|| |d�¡ d S )NrS   )rL   Z
remove_sqlrV   r   r   r   Úremove_indexÜ   s    z!DatabaseSchemaEditor.remove_indexNc                    s    |r
| j n| j}tƒ  |||¡S r   )Úsql_delete_index_concurrentlyÚsql_delete_indexr   rM   )r   r   ÚnameÚsqlrT   r   r   r   rM   ß   s    z&DatabaseSchemaEditor._delete_index_sqlÚ r   )r-   r\   r.   ÚusingÚdb_tablespacerP   r]   r/   Ú	conditionrT   ÚincludeÚexpressionsc                   s4   |s
| j n| j}tƒ j|||||||||	|
||d�S )N)r-   r\   r.   r_   r`   rP   r]   r/   ra   rb   rc   )Úsql_create_indexÚsql_create_index_concurrentlyr   r4   )r   r   r-   r\   r.   r_   r`   rP   r]   r/   ra   rT   rb   rc   r   r   r   r4   ã   s            üz&DatabaseSchemaEditor._create_index_sql)F)F)F)NF)Ú__name__Ú
__module__Ú__qualname__rC   rB   rD   rE   rd   re   r[   rZ   Zsql_create_column_inline_fkZsql_delete_fkZsql_delete_procedurer   r   r&   r(   r   rF   rN   rQ   rX   rY   rM   r4   Ú__classcell__r   r   r   r   r      sN   ÿÿÿ	 T ÿ

         ýr   )r   Zdjango.db.backends.base.schemar   Z!django.db.backends.ddl_referencesr   Zdjango.db.backends.utilsr   r   r   r   r   r   Ú<module>   s   