U
    Hai(                     @   s4   d dl mZmZmZ d dlmZ G dd deZdS )    )BaseDatabaseIntrospection	FieldInfo	TableInfo)Indexc                       s   e Zd Zdddddddddd	d	d
dddddddddZdZg Z fddZdd Zdd Zd"ddZ	dd Z
dd Zd d! Z  ZS )#DatabaseIntrospectionZBooleanFieldZBinaryFieldBigIntegerFieldSmallIntegerFieldIntegerFieldZ	TextFieldZ
FloatFieldZGenericIPAddressFieldZ	CharFieldZ	DateFieldZ	TimeFieldZDateTimeFieldZDurationFieldZDecimalFieldZ	UUIDFieldZ	JSONField)                  i  i  ie  i  i  i:  i;  iZ  i  i  i  i  i  i  Zbtreec                    sF   t  ||}|jrBd|jkrB|dkr*dS |dkr6dS |dkrBdS |S )NZnextvalr	   Z	AutoFieldr   ZBigAutoFieldr   ZSmallAutoField)superget_field_typedefault)selfZ	data_typedescriptionZ
field_type	__class__ O/tmp/pip-unpacked-wheel-3jxiddxt/django/db/backends/postgresql/introspection.pyr   $   s    z$DatabaseIntrospection.get_field_typec                    s4   | d jjjrdnd  fdd| D S )z>Return a list of table and view names in the current database.a  
            SELECT c.relname,
            CASE WHEN {} THEN 'p' WHEN c.relkind IN ('m', 'v') THEN 'v' ELSE 't' END
            FROM pg_catalog.pg_class c
            LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
            WHERE c.relkind IN ('f', 'm', 'p', 'r', 'v')
                AND n.nspname NOT IN ('pg_catalog', 'pg_toast')
                AND pg_catalog.pg_table_is_visible(c.oid)
        zc.relispartitionFALSEc                    s"   g | ]}|d   j krt| qS )r   )ignored_tablesr   .0rowr   r   r   
<listcomp>:   s      z8DatabaseIntrospection.get_table_list.<locals>.<listcomp>)executeformat
connectionfeaturesZsupports_table_partitionsfetchall)r   cursorr   r   r   get_table_list/   s    	z$DatabaseIntrospection.get_table_listc                    sL   | d|g dd | D  | d| jj|   fdd|jD S )zi
        Return a description of the table with the DB-API cursor.description
        interface.
        ag  
            SELECT
                a.attname AS column_name,
                NOT (a.attnotnull OR (t.typtype = 'd' AND t.typnotnull)) AS is_nullable,
                pg_get_expr(ad.adbin, ad.adrelid) AS column_default,
                CASE WHEN collname = 'default' THEN NULL ELSE collname END AS collation
            FROM pg_attribute a
            LEFT JOIN pg_attrdef ad ON a.attrelid = ad.adrelid AND a.attnum = ad.adnum
            LEFT JOIN pg_collation co ON a.attcollation = co.oid
            JOIN pg_type t ON a.atttypid = t.oid
            JOIN pg_class c ON a.attrelid = c.oid
            JOIN pg_namespace n ON c.relnamespace = n.oid
            WHERE c.relkind IN ('f', 'm', 'p', 'r', 'v')
                AND c.relname = %s
                AND n.nspname NOT IN ('pg_catalog', 'pg_toast')
                AND pg_catalog.pg_table_is_visible(c.oid)
        c                 S   s   i | ]}|d  |dd qS )r      Nr   r   liner   r   r   
<dictcomp>U   s      z?DatabaseIntrospection.get_table_description.<locals>.<dictcomp>zSELECT * FROM %s LIMIT 1c              	      s6   g | ].}t |j|j|j|j|j|jf |j  qS r   )r   nameZ	type_codeZdisplay_sizeZinternal_sizeZ	precisionZscaler(   Z	field_mapr   r   r   W   s   
z?DatabaseIntrospection.get_table_description.<locals>.<listcomp>)r    r$   r"   opsZ
quote_namer   r   r%   
table_namer   r,   r   get_table_description<   s    

z+DatabaseIntrospection.get_table_descriptionr   c                    s$   | d g  fdd| D S )Na  
            SELECT s.relname as sequence_name, col.attname
            FROM pg_class s
                JOIN pg_namespace sn ON sn.oid = s.relnamespace
                JOIN pg_depend d ON d.refobjid = s.oid AND d.refclassid = 'pg_class'::regclass
                JOIN pg_attrdef ad ON ad.oid = d.objid AND d.classid = 'pg_attrdef'::regclass
                JOIN pg_attribute col ON col.attrelid = ad.adrelid AND col.attnum = ad.adnum
                JOIN pg_class tbl ON tbl.oid = ad.adrelid
            WHERE s.relkind = 'S'
              AND d.deptype in ('a', 'n')
              AND pg_catalog.pg_table_is_visible(tbl.oid)
              AND tbl.relname = %s
        c                    s    g | ]}|d   |d dqS )r   r'   )r+   tablecolumnr   r   r/   r   r   r   r   s   z7DatabaseIntrospection.get_sequences.<locals>.<listcomp>r    r$   )r   r%   r/   Ztable_fieldsr   r3   r   get_sequencesd   s    
z#DatabaseIntrospection.get_sequencesc                 C   s   dd |  ||D S )z
        Return a dictionary of {field_name: (field_name_other_table, other_table)}
        representing all relationships to the given table.
        c                 S   s"   i | ]}|d  |d |d fqS )r      r'   r   r   r   r   r   r*   |   s      z7DatabaseIntrospection.get_relations.<locals>.<dictcomp>)get_key_columnsr.   r   r   r   get_relationsw   s    z#DatabaseIntrospection.get_relationsc                 C   s   | d|g | S )Na[  
            SELECT a1.attname, c2.relname, a2.attname
            FROM pg_constraint con
            LEFT JOIN pg_class c1 ON con.conrelid = c1.oid
            LEFT JOIN pg_class c2 ON con.confrelid = c2.oid
            LEFT JOIN pg_attribute a1 ON c1.oid = a1.attrelid AND a1.attnum = con.conkey[1]
            LEFT JOIN pg_attribute a2 ON c2.oid = a2.attrelid AND a2.attnum = con.confkey[1]
            WHERE
                c1.relname = %s AND
                con.contype = 'f' AND
                c1.relnamespace = c2.relnamespace AND
                pg_catalog.pg_table_is_visible(c1.oid)
        r4   r.   r   r   r   r7   ~   s    z%DatabaseIntrospection.get_key_columnsc                 C   s  i }| d|g | D ]L\}}}}}||dk|dk|dkrNt|ddnd|dkd	d|d
||< q| d| j|g | D ]~\}	}}
}}}}}|	|kr|| jko|	d o|dk}|dgkr|ng |dgkr|ng ||
dd	d|rtjn|||d
||	< q|S )z
        Retrieve any constraints or keys (unique, pk, fk, check, index) across
        one or more columns. Also retrieve the definition of expression-based
        indexes.
        aH  
            SELECT
                c.conname,
                array(
                    SELECT attname
                    FROM unnest(c.conkey) WITH ORDINALITY cols(colid, arridx)
                    JOIN pg_attribute AS ca ON cols.colid = ca.attnum
                    WHERE ca.attrelid = c.conrelid
                    ORDER BY cols.arridx
                ),
                c.contype,
                (SELECT fkc.relname || '.' || fka.attname
                FROM pg_attribute AS fka
                JOIN pg_class AS fkc ON fka.attrelid = fkc.oid
                WHERE fka.attrelid = c.confrelid AND fka.attnum = c.confkey[1]),
                cl.reloptions
            FROM pg_constraint AS c
            JOIN pg_class AS cl ON c.conrelid = cl.oid
            WHERE cl.relname = %s AND pg_catalog.pg_table_is_visible(cl.oid)
        p)r9   uf.r'   NcF)columnsprimary_keyuniqueforeign_keycheckindex
definitionoptionsa  
            SELECT
                indexname, array_agg(attname ORDER BY arridx), indisunique, indisprimary,
                array_agg(ordering ORDER BY arridx), amname, exprdef, s2.attoptions
            FROM (
                SELECT
                    c2.relname as indexname, idx.*, attr.attname, am.amname,
                    CASE
                        WHEN idx.indexprs IS NOT NULL THEN
                            pg_get_indexdef(idx.indexrelid)
                    END AS exprdef,
                    CASE am.amname
                        WHEN %s THEN
                            CASE (option & 1)
                                WHEN 1 THEN 'DESC' ELSE 'ASC'
                            END
                    END as ordering,
                    c2.reloptions as attoptions
                FROM (
                    SELECT *
                    FROM pg_index i, unnest(i.indkey, i.indoption) WITH ORDINALITY koi(key, option, arridx)
                ) idx
                LEFT JOIN pg_class c ON idx.indrelid = c.oid
                LEFT JOIN pg_class c2 ON idx.indexrelid = c2.oid
                LEFT JOIN pg_am am ON c2.relam = am.oid
                LEFT JOIN pg_attribute attr ON attr.attrelid = c.oid AND attr.attnum = idx.key
                WHERE c.relname = %s AND pg_catalog.pg_table_is_visible(c.oid)
            ) s2
            GROUP BY indexname, indisunique, indisprimary, amname, exprdef, attoptions;
        Z_btreeT)
r>   ordersr?   r@   rA   rB   rC   typerD   rE   )r    r$   tuplesplitindex_default_access_methodendswithr   suffix)r   r%   r/   constraints
constraintr>   kindZ	used_colsrE   rC   r@   ZprimaryrF   type_rD   Zbasic_indexr   r   r   get_constraints   sH    

z%DatabaseIntrospection.get_constraints)r   )__name__
__module____qualname__Zdata_types_reverserJ   r   r   r&   r0   r5   r8   r7   rQ   __classcell__r   r   r   r   r      s<   (
r   N)Z%django.db.backends.base.introspectionr   r   r   Zdjango.db.modelsr   r   r   r   r   r   <module>   s   