U
    8ÄT_'  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                
       sÒ   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&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)szOCREATE INDEX %(name)s ON %(table)s%(using)s (%(columns)s)%(extra)s%(condition)sz\CREATE INDEX CONCURRENTLY %(name)s ON %(table)s%(using)s (%(columns)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 |¡ ¡  ¡ S )Nú%z%%)Ú
isinstanceÚstrÚreplaceÚpsycopg2Ú
extensionsZadaptZ	getquotedÚdecode)ÚselfÚvalue© r   úH/tmp/pip-unpacked-wheel-dv63caxw/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
connectionZ
data_typesÚgetÚget_internal_typeÚdb_type©r   r   r   r   r   Ú_field_data_type/   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$   7   s    z+DatabaseSchemaEditor._field_base_data_typesc                 C   sr   |j | jd�}|dk	rn|js"|jrnd|kr.dS | d¡rN| j||gddgd�S | d¡rn| j||gdd	gd�S dS )
z£
        Return the statement to create an index with varchar operator pattern
        when the column type is 'varchar' or 'text', otherwise return None.
        )r   Nú[ÚvarcharÚ_likeZvarchar_pattern_ops)ÚsuffixÚ	opclassesÚtextZtext_pattern_ops)r    r   Údb_indexÚuniqueÚ
startswithÚ_create_index_sql)r   r   r   r    r   r   r   r   >   s    

z+DatabaseSchemaEditor._create_like_index_sqlc                    sœ  d| _ d}| ¡ }| ¡ }|dkrV||krVt|  |¡ƒt|  |¡ƒkrx|  j |7  _ n"|  |¡|  |¡krx|  j |7  _ t|jjƒ}ddddœ}	| ¡ |	k�r†t|j	ƒ}
d||
f }| j |  
|
¡|	| ¡  d	œ g f| jd
|  
|¡i g f| jd
|  
|¡i g f| j|  
|¡| j|  
|
¡d|  
|¡ dœ dœ g f| j|  
|¡|  
|
¡|  
|¡dœ g f| j|  
|¡|  
|
¡|  
|¡dœ g fgfS tƒ  ||||¡S d S )Nz%ALTER COLUMN %(column)s TYPE %(type)sz USING %(column)s::%(type)sr#   ZbigintÚintegerZsmallint)Z	bigserialÚserialZsmallserialz	%s_%s_seq)ÚcolumnÚtypeÚsequenceznextval('%s'))r1   Údefault)ÚtableÚchanges)r5   r1   r3   )Zsql_alter_column_typer   Úlistr$   r"   r   Ú_metaÚdb_tableÚlowerr1   Ú
quote_nameÚsql_delete_sequenceÚsql_create_sequenceZsql_alter_columnZsql_alter_column_defaultÚsql_set_sequence_maxÚsql_set_sequence_ownerr   Ú_alter_column_type_sql)r   r   Ú	old_fieldÚ	new_fieldÚnew_typeZ	using_sqlZnew_internal_typeZold_internal_typer5   Zserial_fields_mapr1   Zsequence_namer   r   r   r@   T   st    

þû	 ÿü ÿüþþøýú	ýúáø2z+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&   r*   Zcitextr'   )r(   )r+   r,   r-   Z_create_index_namer8   r9   r1   ÚexecuteÚ_delete_index_sqlr   Ú_alter_fieldr   )r   r   rA   rB   Zold_typerC   Zold_db_paramsZnew_db_paramsÚstrictZ
index_namer   Zindex_to_remover   r   r   rF   š   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   r;   r   Ú_index_columns)r   r5   ÚcolumnsrH   r)   r   r   r   rI   ¶   s    z#DatabaseSchemaEditor._index_columnsc                 C   s   | j |j|| |d�d d� d S )N©Úconcurrently)Úparams)rD   Z
create_sql©r   r   ÚindexrL   r   r   r   Ú	add_index»   s    zDatabaseSchemaEditor.add_indexc                 C   s   |   |j|| |d�¡ d S )NrK   )rD   Z
remove_sqlrN   r   r   r   Úremove_index¾   s    z!DatabaseSchemaEditor.remove_indexNc                    s    |r
| j n| j}tƒ  |||¡S r   )Úsql_delete_index_concurrentlyÚsql_delete_indexr   rE   )r   r   ÚnameÚsqlrL   r   r   r   rE   Á   s    z&DatabaseSchemaEditor._delete_index_sqlÚ r   )	rT   r(   ÚusingÚdb_tablespacerH   rU   r)   Ú	conditionrL   c       	            s0   |s
| j n| j}tƒ j|||||||||	|
d�
S )N)rT   r(   rW   rX   rH   rU   r)   rY   )Úsql_create_indexÚsql_create_index_concurrentlyr   r.   )r   r   ÚfieldsrT   r(   rW   rX   rH   rU   r)   rY   rL   r   r   r   r.   Å   s            þz&DatabaseSchemaEditor._create_index_sql)F)F)F)NF)Ú__name__Ú
__module__Ú__qualname__r=   r<   r>   r?   rZ   r[   rS   rR   Zsql_create_column_inline_fkZsql_delete_fkZsql_delete_procedurer   r   r"   r$   r   r@   rF   rI   rP   rQ   rE   r.   Ú__classcell__r   r   r   r   r      sF   ÿÿG 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   