B
    CVvg@7  ã               @   sd   d dl mZ d dlZd dlmZ d dlmZmZm	Z	 d dl
mZ edejd ƒZG dd	„ d	eƒZdS )
é    )Ú
namedtupleN)Úmodels)ÚBaseDatabaseIntrospectionÚ	FieldInfoÚ	TableInfo)Úcached_propertyr   )Úis_autofieldÚis_jsonc                   sn   e Zd ZdZedd„ ƒZ‡ fdd„Zdd„ Zdd	„ Zd
d„ Z	ddd„Z
dd„ Zdd„ Zdd„ Zdd„ Z‡  ZS )ÚDatabaseIntrospectioné   c             C   s¨   | j jdk rXtjdtjdtjdtjdtjdtjdtj	dtj
dtjdtjdtjdtjd	iS tjdtjdtjdtjdtjdtjdtjdtjdtjdtjdtjd	tjdiS d S )
N)é   ZBinaryFieldZ	TextFieldZ	DateFieldZ	CharFieldZDurationFieldÚ
FloatFieldZDecimalFieldZDateTimeField)Ú
connectionZcx_oracle_versionÚ	cx_OracleZBLOBZCLOBZDATETIMEZ
FIXED_CHARZFIXED_NCHARZINTERVALZNATIVE_FLOATZNCHARÚNCLOBÚNUMBERÚSTRINGÚ	TIMESTAMPZDB_TYPE_DATEZDB_TYPE_BINARY_DOUBLEZDB_TYPE_BLOBZDB_TYPE_CHARZDB_TYPE_CLOBZDB_TYPE_INTERVAL_DSZDB_TYPE_NCHARZDB_TYPE_NCLOBZDB_TYPE_NVARCHARZDB_TYPE_NUMBERZDB_TYPE_TIMESTAMPZDB_TYPE_VARCHAR)Úself© r   úK/tmp/pip-install-o3oxmrkh/Django/django/db/backends/oracle/introspection.pyÚdata_types_reverse   s2    
z(DatabaseIntrospection.data_types_reversec                s¦   |t jkr„|dd… \}}|dkrv|dkr8|jr4dS dS d|  k rLdk rZn n
|jrZdS |dkrfd	S |jrpd
S dS q˜|dkr˜dS n|t jkr˜|jr˜dS tƒ  ||¡S )Né   é   r   é   ZBigAutoFieldZBigIntegerFieldr   ZSmallAutoFieldZBooleanFieldÚ	AutoFieldZIntegerFieldiÿÿÿr   Z	JSONField)r   r   r   r   r	   ÚsuperÚget_field_type)r   Z	data_typeÚdescriptionZ	precisionZscale)Ú	__class__r   r   r   3   s"    
z$DatabaseIntrospection.get_field_typec                s    |  d¡ ‡ fdd„| ¡ D ƒS )z>Return a list of table and view names in the current database.a¨  
            SELECT table_name, 't'
            FROM user_tables
            WHERE
                NOT EXISTS (
                    SELECT 1
                    FROM user_mviews
                    WHERE user_mviews.mview_name = user_tables.table_name
                )
            UNION ALL
            SELECT view_name, 'v' FROM user_views
            UNION ALL
            SELECT mview_name, 'v' FROM user_mviews
        c                s$   g | ]}t ˆ  |d  ¡|d ƒ‘qS )r   r   )r   Úidentifier_converter)Ú.0Úrow)r   r   r   ú
<listcomp>X   s    z8DatabaseIntrospection.get_table_list.<locals>.<listcomp>)ÚexecuteÚfetchall)r   Úcursorr   )r   r   Úget_table_listH   s    z$DatabaseIntrospection.get_table_listc             C   sÔ   |  d|g¡ dd„ | ¡ D ƒ}|  jd7  _|  d | jj |¡| j¡¡ g }x~|jD ]t}|d }|| \}}}	}
}|i  }| t	|  
|¡f|dd… ||d p¤d|d	 p®df|d
d… ||	|
|fžŽ ¡ qXW |S )zi
        Return a description of the table with the DB-API cursor.description
        interface.
        a>  
            SELECT
                user_tab_cols.column_name,
                user_tab_cols.data_default,
                CASE
                    WHEN user_tab_cols.collation = user_tables.default_collation
                    THEN NULL
                    ELSE user_tab_cols.collation
                END collation,
                CASE
                    WHEN user_tab_cols.char_used IS NULL
                    THEN user_tab_cols.data_length
                    ELSE user_tab_cols.char_length
                END as internal_size,
                CASE
                    WHEN user_tab_cols.identity_column = 'YES' THEN 1
                    ELSE 0
                END as is_autofield,
                CASE
                    WHEN EXISTS (
                        SELECT  1
                        FROM user_json_columns
                        WHERE
                            user_json_columns.table_name = user_tab_cols.table_name AND
                            user_json_columns.column_name = user_tab_cols.column_name
                    )
                    THEN 1
                    ELSE 0
                END as is_json
            FROM user_tab_cols
            LEFT OUTER JOIN
                user_tables ON user_tables.table_name = user_tab_cols.table_name
            WHERE user_tab_cols.table_name = UPPER(%s)
        c             S   s4   i | ],\}}}}}}||d kr"|nd|||f|“qS )ZNULLNr   )r!   ÚcolumnÚdefaultÚ	collationÚinternal_sizer   r	   r   r   r   ú
<dictcomp>‚   s   z?DatabaseIntrospection.get_table_description.<locals>.<dictcomp>r   z,SELECT * FROM {} WHERE ROWNUM < 2 AND {} > 0r   é   r   é   r   N)r$   r%   Úcache_bust_counterÚformatr   ÚopsZ
quote_namer   Úappendr   r    )r   r&   Ú
table_nameZ	field_mapr   ÚdescÚnamer+   r)   r*   r   r	   r   r   r   Úget_table_descriptionZ   s"    !

 ,z+DatabaseIntrospection.get_table_descriptionc             C   s   |  ¡ S )z7Identifier comparison is case insensitive under Oracle.)Úlower)r   r5   r   r   r   r    •   s    z*DatabaseIntrospection.identifier_converterr   c             C   sn   |  d|g¡ | ¡ }|rB|  |d ¡|  |¡|  |d ¡dœgS x&|D ]}t|tjƒrH||jdœgS qHW g S )Na|  
            SELECT
                user_tab_identity_cols.sequence_name,
                user_tab_identity_cols.column_name
            FROM
                user_tab_identity_cols,
                user_constraints,
                user_cons_columns cols
            WHERE
                user_constraints.constraint_name = cols.constraint_name
                AND user_constraints.table_name = user_tab_identity_cols.table_name
                AND cols.column_name = user_tab_identity_cols.column_name
                AND user_constraints.constraint_type = 'P'
                AND user_tab_identity_cols.table_name = UPPER(%s)
        r   r   )r5   Útabler(   )r8   r(   )r$   Úfetchoner    Ú
isinstancer   r   r(   )r   r&   r3   Ztable_fieldsr"   Úfr   r   r   Úget_sequences™   s    

z#DatabaseIntrospection.get_sequencesc                s,   |  ¡ }| d|g¡ ‡ fdd„| ¡ D ƒS )z—
        Return a dictionary of {field_name: (field_name_other_table, other_table)}
        representing all relationships to the given table.
        ab  
    SELECT ca.column_name, cb.table_name, cb.column_name
    FROM   user_constraints, USER_CONS_COLUMNS ca, USER_CONS_COLUMNS cb
    WHERE  user_constraints.table_name = %s AND
           user_constraints.constraint_name = ca.constraint_name AND
           user_constraints.r_constraint_name = cb.constraint_name AND
           ca.position = cb.positionc                s.   i | ]&\}}}ˆ   |¡ˆ   |¡fˆ   |¡“qS r   )r    )r!   Ú
field_nameZrel_table_nameZrel_field_name)r   r   r   r,   Æ   s   z7DatabaseIntrospection.get_relations.<locals>.<dictcomp>)Úupperr$   r%   )r   r&   r3   r   )r   r   Úget_relations¸   s
    

z#DatabaseIntrospection.get_relationsc                s(   |  d| ¡ g¡ ‡ fdd„| ¡ D ƒS )Naš  
            SELECT ccol.column_name, rcol.table_name AS referenced_table, rcol.column_name AS referenced_column
            FROM user_constraints c
            JOIN user_cons_columns ccol
              ON ccol.constraint_name = c.constraint_name
            JOIN user_cons_columns rcol
              ON rcol.constraint_name = c.r_constraint_name
            WHERE c.table_name = %s AND c.constraint_type = 'R'c                s"   g | ]}t ‡ fd d„|D ƒƒ‘qS )c             3   s   | ]}ˆ   |¡V  qd S )N)r    )r!   Úcell)r   r   r   ú	<genexpr>×   s    zCDatabaseIntrospection.get_key_columns.<locals>.<listcomp>.<genexpr>)Útuple)r!   r"   )r   r   r   r#   ×   s   z9DatabaseIntrospection.get_key_columns.<locals>.<listcomp>)r$   r>   r%   )r   r&   r3   r   )r   r   Úget_key_columnsÍ   s    
z%DatabaseIntrospection.get_key_columnsc             C   s,   |  d|g¡ | ¡ }|r(|  |d ¡S d S )NaŽ  
            SELECT
                cols.column_name
            FROM
                user_constraints,
                user_cons_columns cols
            WHERE
                user_constraints.constraint_name = cols.constraint_name AND
                user_constraints.constraint_type = 'P' AND
                user_constraints.table_name = UPPER(%s) AND
                cols.position = 1
        r   )r$   r9   r    )r   r&   r3   r"   r   r   r   Úget_primary_key_columnÛ   s    
z,DatabaseIntrospection.get_primary_key_columnc             C   s  i }|  d|g¡ x@| ¡ D ]4\}}}}}|  |¡}| d¡||d||dœ||< qW |  d|g¡ xB| ¡ D ]6\}}}	}
|  |¡}dd|	|
fdd| d¡dœ||< qlW |  d|g¡ xT| ¡ D ]H\}}}}|  |¡}ddddd	|d
krêdn|| d¡| d¡dœ||< q¾W |S )zu
        Retrieve any constraints or keys (unique, pk, fk, check, index) across
        one or more columns.
        a$  
            SELECT
                user_constraints.constraint_name,
                LISTAGG(LOWER(cols.column_name), ',') WITHIN GROUP (ORDER BY cols.position),
                CASE user_constraints.constraint_type
                    WHEN 'P' THEN 1
                    ELSE 0
                END AS is_primary_key,
                CASE
                    WHEN user_constraints.constraint_type IN ('P', 'U') THEN 1
                    ELSE 0
                END AS is_unique,
                CASE user_constraints.constraint_type
                    WHEN 'C' THEN 1
                    ELSE 0
                END AS is_check_constraint
            FROM
                user_constraints
            LEFT OUTER JOIN
                user_cons_columns cols ON user_constraints.constraint_name = cols.constraint_name
            WHERE
                user_constraints.constraint_type = ANY('P', 'U', 'C')
                AND user_constraints.table_name = UPPER(%s)
            GROUP BY user_constraints.constraint_name, user_constraints.constraint_type
        ú,N)ÚcolumnsÚprimary_keyÚuniqueÚforeign_keyÚcheckÚindexaÞ  
            SELECT
                cons.constraint_name,
                LISTAGG(LOWER(cols.column_name), ',') WITHIN GROUP (ORDER BY cols.position),
                LOWER(rcols.table_name),
                LOWER(rcols.column_name)
            FROM
                user_constraints cons
            INNER JOIN
                user_cons_columns rcols ON rcols.constraint_name = cons.r_constraint_name AND rcols.position = 1
            LEFT OUTER JOIN
                user_cons_columns cols ON cons.constraint_name = cols.constraint_name
            WHERE
                cons.constraint_type = 'R' AND
                cons.table_name = UPPER(%s)
            GROUP BY cons.constraint_name, rcols.table_name, rcols.column_name
        F)rG   rH   rI   rJ   rK   rF   a¹  
            SELECT
                ind.index_name,
                LOWER(ind.index_type),
                LISTAGG(LOWER(cols.column_name), ',') WITHIN GROUP (ORDER BY cols.column_position),
                LISTAGG(cols.descend, ',') WITHIN GROUP (ORDER BY cols.column_position)
            FROM
                user_ind_columns cols, user_indexes ind
            WHERE
                cols.table_name = UPPER(%s) AND
                NOT EXISTS (
                    SELECT 1
                    FROM user_constraints cons
                    WHERE ind.index_name = cons.index_name
                ) AND cols.index_name = ind.index_name
            GROUP BY ind.index_name, ind.index_type
        TZnormalÚidx)rG   rH   rI   rJ   rK   ÚtyperF   Úorders)r$   r%   r    Úsplit)r   r&   r3   ÚconstraintsÚ
constraintrF   ÚpkrH   rJ   Zother_tableZother_columnÚtype_rN   r   r   r   Úget_constraintsë   sD    





z%DatabaseIntrospection.get_constraints)r   )Ú__name__Ú
__module__Ú__qualname__r/   r   r   r   r'   r6   r    r<   r?   rC   rD   rT   Ú__classcell__r   r   )r   r   r
      s   !;
r
   )Úcollectionsr   r   Z	django.dbr   Z%django.db.backends.base.introspectionr   r   ZBaseFieldInfor   Zdjango.utils.functionalr   Ú_fieldsr
   r   r   r   r   Ú<module>   s   