o
    <g)                     @   sT   d dl Z d dlZd dlZd dlmZ d dlmZmZ d dlm	Z	 G dd deZ
dS )    N)DatabaseError)BaseDatabaseSchemaEditor_related_non_m2m_objects)duration_iso_stringc                       s   e Zd ZdZdZdZdZdZdZeZ	dZ
dZd	Zd
Zdd Z fddZ fddZd) fdd	Z fddZ fddZdd Zdd Zdd Z fddZd d! Zd"d# Zd$d% Zd* fd'd(	Z  ZS )+DatabaseSchemaEditorz3ALTER TABLE %(table)s ADD %(column)s %(definition)sz'MODIFY %(column)s %(type)s%(collation)szMODIFY %(column)s NULLzMODIFY %(column)s NOT NULLz%MODIFY %(column)s DEFAULT %(default)szMODIFY %(column)s DEFAULT NULLz,ALTER TABLE %(table)s DROP COLUMN %(column)szHCONSTRAINT %(name)s REFERENCES %(to_table)s(%(to_column)s)%(deferrable)sz(DROP TABLE %(table)s CASCADE CONSTRAINTSz9CREATE INDEX %(name)s ON %(table)s (%(columns)s)%(extra)sc                 C   s   t |tjtjtjfrd| S t |tjrdt| S t |tr(d|dd S t |tt	t
fr6d|  S t |trA|r?dS dS t|S )Nz'%s''z''10)
isinstancedatetimedatetime	timedeltar   strreplacebytes	bytearray
memoryviewhexboolselfvalue r   S/var/www/html/venv/lib/python3.10/site-packages/django/db/backends/oracle/schema.pyquote_value   s   

z DatabaseSchemaEditor.quote_valuec                    s6   |  |jj|jr| |jj|j t || d S N)_is_identity_column_metadb_tablecolumn_drop_identitysuperremove_field)r   modelfield	__class__r   r   r#   +   s   z!DatabaseSchemaEditor.remove_fieldc                    s0   t  | | dd| jj|jji  d S )NaK  
            DECLARE
                i INTEGER;
            BEGIN
                SELECT COUNT(1) INTO i FROM USER_SEQUENCES
                    WHERE SEQUENCE_NAME = '%(sq_name)s';
                IF i = 1 THEN
                    EXECUTE IMMEDIATE 'DROP SEQUENCE "%(sq_name)s"';
                END IF;
            END;
        /sq_name)r"   delete_modelexecute
connectionops_get_no_autofield_sequence_namer   r   )r   r$   r&   r   r   r)   2   s   
z!DatabaseSchemaEditor.delete_modelFc              
      s2  zt  |||| W d S  ty } zt|}d|v s d|v r(| ||| nPd|v r>| |jj|j | |||| nAd|v rT|j	rT| j
|dd | ||| n2d|v rw|j	rw| j
|dd | |||| |j	rv| | || n W Y d }~d S W Y d }~d S W Y d }~d S W Y d }~d S d }~ww )Nz	ORA-22858z	ORA-22859z	ORA-30675z	ORA-30673T)strictz	ORA-43923)r"   alter_fieldr   r   _alter_field_type_workaroundr!   r   r   r    primary_key_delete_primary_keyr*   _create_primary_key_sql)r   r$   	old_field	new_fieldr.   edescriptionr&   r   r   r/   I   s0   z DatabaseSchemaEditor.alter_fieldc                    sd  t |}| dv|_| |j|_| || | |j}|| j	}t
d|r1d| }d}t
d|rY| }|dkrDd| }n|dkrMd	| }n|d
krYd| }d	| }| d| |jj| |j|f  | || t ||| || j	}|jr|js|jr|jr||krt||D ]\}	}
|
jjr| | |
j|
jd qdS dS dS dS )a  
        Oracle refuses to change from some type to other type.
        What we need to do instead is:
        - Add a nullable version of the desired field with a temporary name. If
          the new column is an auto field, then the temporary column can't be
          nullable.
        - Update the table to transfer values from old to new
        - Drop old column
        - Rename the new column and possibly drop the nullable property
        )	AutoFieldBigAutoFieldSmallAutoFieldz^N?CLOBzTO_CHAR(%s)VARCHAR2z^N?VARCHAR2	DateFieldzTO_DATE(%s, 'YYYY-MM-DD')DateTimeFieldz,TO_TIMESTAMP(%s, 'YYYY-MM-DD HH24:MI:SS.FF')	TimeFieldzCONCAT('1900-01-01 ', %s)zUPDATE %s set %s=%s_fkN)copydeepcopyget_internal_typenull_generate_temp_namer    	add_field
quote_namedb_typer+   rematchr*   r   r   r#   r"   r/   r1   uniquer   r%   db_constraint_create_fk_sqlrelated_model)r   r$   r4   r5   new_temp_field	new_valueold_typenew_internal_typenew_type_relr&   r   r   r0   g   s^   



	z1DatabaseSchemaEditor._alter_field_type_workaroundc                    sZ   h d}|  |v r"|  |vr"| |jj|jr"| |jj|j t ||||||S )N>   r8   r9   r:   )rB   r   r   r   r    r!   r"   _alter_column_type_sql)r   r$   r4   r5   rR   old_collationnew_collationauto_field_typesr&   r   r   rU      s   z+DatabaseSchemaEditor._alter_column_type_sqlc                 C   s2   |  |}|d dkr|d dkr|dd }|S )z
        Get the properly shortened and uppercased identifier as returned by
        quote_name() but without the quotes.
        r   "   )rF   )r   namennr   r   r   normalize_name   s   
z#DatabaseSchemaEditor.normalize_namec                 C   s*   t t| dd }| |d | S )z@Generate temporary names for workarounds that need temp columns.r[   NrS   )r   hashupperr^   )r   for_namesuffixr   r   r   rD      s   z(DatabaseSchemaEditor._generate_temp_namec                 C   s
   |  |S r   )r   r   r   r   r   prepare_default   s   
z$DatabaseSchemaEditor.prepare_defaultc                    s:   t  ||}|| j}|d ur| | jjv rdS |S )NF)r"   _field_should_be_indexedrG   r+   lower_limited_data_types)r   r$   r%   create_indexrG   r&   r   r   rd      s   z-DatabaseSchemaEditor._field_should_be_indexedc                 C   sb   | j  "}|d| || |g | }|r|d ndW  d    S 1 s*w   Y  d S )Nz
                SELECT
                    CASE WHEN identity_column = 'YES' THEN 1 ELSE 0 END
                FROM user_tab_cols
                WHERE table_name = %s AND
                      column_name = %s
                r   Fr+   cursorr*   r^   fetchone)r   
table_namecolumn_nameri   rowr   r   r   r      s   
$z(DatabaseSchemaEditor._is_identity_columnc                 C   s$   |  d| || |d  d S )Nz5ALTER TABLE %(table)s MODIFY %(column)s DROP IDENTITY)tabler    )r*   rF   )r   rk   rl   r   r   r   r!      s   z#DatabaseSchemaEditor._drop_identityc                 C   sN   | j  }|d| |g | d W  d    S 1 s w   Y  d S )Nza
                SELECT default_collation FROM user_tables WHERE table_name = %s
                r   rh   )r   rk   ri   r   r   r   _get_default_collation   s   

$z+DatabaseSchemaEditor._get_default_collationNc                    s*   |d u r|d ur|  |}t |||S r   )ro   r"   _collate_sql)r   	collationrV   rk   r&   r   r   rp      s   
z!DatabaseSchemaEditor._collate_sql)F)NN)__name__
__module____qualname__sql_create_columnsql_alter_column_typesql_alter_column_nullsql_alter_column_not_nullsql_alter_column_defaultsql_alter_column_no_default sql_alter_column_no_default_nullsql_delete_columnsql_create_column_inline_fksql_delete_tablesql_create_indexr   r#   r)   r/   r0   rU   r^   rD   rc   rd   r   r!   ro   rp   __classcell__r   r   r&   r   r      s6    C

	
r   )r@   r   rH   	django.dbr   django.db.backends.base.schemar   r   django.utils.durationr   r   r   r   r   r   <module>   s    