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This module implements Cursors of various types for MySQLdb. By
default, MySQLdb uses the Cursor class.
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BaseCursora A base for Cursor classes. Useful attributes:
description
A tuple of DB API 7-tuples describing the columns in
the last executed query; see PEP-249 for details.
description_flags
Tuple of column flags for last query, one entry per column
in the result set. Values correspond to those in
MySQLdb.constants.FLAG. See MySQL documentation (C API)
for more information. Non-standard extension.
arraysize
default number of rows fetchmany() will fetch
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|�S d S )N)r* c 3 s | ]}� � |�V qd S )N)�literal)r, �arg)�connr" r# r. o s z*BaseCursor._escape_args.<locals>.<genexpr>c 3 s" | ]\}}� |�� |�fV qd S )Nr" )r, �key�val)� ensure_bytesr" r# r. r s c 3 s | ]\}}|� � |�fV qd S )N)r6 )r, r9 r: )r8 r" r# r. t s ) r r+ r* r/ r2 r3 �PY2�map�dict�itemsr6 )r! �argsr8 r" )r8 r; r# � _escape_argsi s
zBaseCursor._escape_argsc C s | j s| �| td� d S )Nzexecute() first)r r r )r! r" r" r# �_check_executed| s zBaseCursor._check_executedc C s ddl m} | �� }| jd kr(|�� | _| jr�| j}d| _| jrv| jjrvd|f }| j�|� || � d|�dd� d S |�
� }|r�x |D ]}| j�| j |f� q�W xZ|D ] }|| j |dd� � dd� q�W n2|� � }|r�| j�| j |f� || � d|�dd� d S )Nr )�warnz There are %d MySQL warnings.� )�
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zBaseCursor._warning_checkc C sR | j r| �� | jdd�= | �� }|�� }|dkr6dS | �� | �� | �� dS )z`Advance to the next result set.
Returns None if there are no more result sets.
Nr r )r �fetchallr rG Z next_result�_do_get_result�_post_get_resultrN )r! rK Znrr" r" r# r% � s zBaseCursor.nextsetc C s d S )Nr" )r! r" r" r# rQ � � zBaseCursor._post_get_resultc C sb | � � }| �� | _|�� | _d| _| jr2| j�� p4d | _| jrH| j�� pJd | _ |�
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zBaseCursor._do_get_resultc G s dS )z!Does nothing, required by DB API.Nr" )r! r@ r" r" r# �
setinputsizes� s zBaseCursor.setinputsizesc G s dS )z!Does nothing, required by DB API.Nr" )r! r@ r" r" r# �setoutputsizes� s zBaseCursor.setoutputsizesc C s | j }|d krtd��|S )Nz
cursor closed)r r )r! Zconr" r" r# rG � s zBaseCursor._get_dbc
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�r6 t�� dd� \}}| �| ||� Y nX || _| j�sN| �� |S )a� Execute a query.
query -- string, query to execute on server
args -- optional sequence or mapping, parameters to use with query.
Note: If args is a sequence, then %s must be used as the
parameter placeholder in the query. If a mapping is used,
%(key)s must be used as the placeholder.
Returns integer represents rows affected, if any
Nc 3 s | ]\}}|� � |�fV qd S )N)r6 )r, r9 �item)rK r" r# r. � s z%BaseCursor.execute.<locals>.<genexpr>�surrogateescaper )r% rG r< r/ r r1 �unicode_literal�charsetr> r? r2 r= r6 �bytes� bytearray�decode� TypeErrorr r �str�_query� Exception�sysr( r �_defer_warningsrN )r! �queryr@ �m�res�exc�valuer" )rK r# �execute� s6
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ax Execute a multi-row query.
:param query: query to execute on server
:param args: Sequence of sequences or mappings. It is used as parameter.
:return: Number of rows affected, if any.
This method improves performance on multiple-row INSERT and
REPLACE. Otherwise it is equivalent to looping over args with
execute().
Nr r" r rD � r �(r �)c 3 s | ]}�� � |�V qd S )N)rh )r, r7 )rc r! r" r# r. s z)BaseCursor.executemany.<locals>.<genexpr>) r �RE_INSERT_VALUES�match�group�rstrip�AssertionError�_do_execute_many�max_stmt_lengthrG r* �sumr )r! rc r@ rd Zq_prefixZq_valuesZ q_postfixr" )rc r! r# � executemany s
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| js�| �� |S )a Execute stored procedure procname with args
procname -- string, name of procedure to execute on server
args -- Sequence of parameters to use with procedure
Returns the original args.
Compatibility warning: PEP-249 specifies that any modified
parameters must be returned. This is currently impossible
as they are only available by storing them in a server
variable and then retrieved by a query. Since stored
procedures return zero or more result sets, there is no
reliable way to get at OUT or INOUT parameters via callproc.
The server variables are named @_procname_n, where procname
is the parameter above and n is the position of the parameter
(from zero). Once all result sets generated by the procedure
have been fetched, you can issue a SELECT @_procname_0, ...
query using .execute() to get any OUT or INOUT values.
Compatibility warning: The act of calling a stored procedure
itself creates an empty result set. This appears after any
result sets generated by the procedure. This is non-standard
behavior with respect to the DB-API. Be sure to use nextset()
to advance through all result sets; otherwise you may get
disconnected.
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<listcomp>i s z'BaseCursor.callproc.<locals>.<listcomp>)rG � enumerater6 r/ r r1 rX rY r_ r% �join�rangerx r rb rN )r! r~ r@ rK �indexr7 �qr" )r~ r# �callprocB s$
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result set can be very large, consider adding a LIMIT clause to your
query, or using CursorUseResultMixIn instead.c C s | � � �� S )N)rG Z store_result)r! r" r" r# rS � s z"CursorStoreResultMixIn._get_resultc C s | � |�}| �� |S )N)r� rQ )r! r� r r" r" r# r_ � s
z CursorStoreResultMixIn._queryc C s | � d�| _d | _d S )Nr )r� �_rowsr )r! r" r" r# rQ � s z'CursorStoreResultMixIn._post_get_resultc C s8 | � � | jt| j�kr dS | j| j }| jd | _|S )z]Fetches a single row from the cursor. None indicates that
no more rows are available.Nr )rB r rx r� )r! �resultr" r" r# r� � s z CursorStoreResultMixIn.fetchoneNc C s> | � � | j|p| j }| j| j|� }t|t| j��| _|S )z�Fetch up to size rows from the cursor. Result set may be smaller
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z CursorStoreResultMixIn.fetchmanyc C s6 | � � | jr | j| jd� }n| j}t| j�| _|S )z*Fetchs all available rows from the cursor.N)rB r r� rx )r! r� r" r" r# rO � s z CursorStoreResultMixIn.fetchall�relativec C sn | � � |dkr | j| }n$|dkr*|}n| �| tdt|� � |dk sV|t| j�krd| �| td� || _dS )a Scroll the cursor in the result set to a new position according
to mode.
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value states an absolute target position.r� Zabsolutezunknown scroll mode %sr z out of rangeN)rB r r r �reprrx r� �
IndexError)r! rg �mode�rr" r" r# �scroll� s z CursorStoreResultMixIn.scrollc C s, | � � | jr | j| jd � p"| j}t|�S )N)rB r r� rv )r! r� r" r" r# r� � s z CursorStoreResultMixIn.__iter__)N)r� ) r� r� r� r� rS r_ rQ r� r� rO r� r� r" r" r" r# r� � s
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close() the cursor before additional queries can be performed on
the connection.Tc C s | � � �� S )N)rG Z
use_result)r! r" r" r# rS � rR z CursorUseResultMixIn._get_resultc C s6 | � � | �d�}|s"| �� dS | jd | _|d S )z%Fetches a single row from the cursor.r Nr )rB r� rN r )r! r� r" r" r# r� � s
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r� c @ s e Zd ZdZdZdS )�CursorOldDictRowsMixInz�This is a MixIn class that returns rows as dictionaries with
the same key convention as the old Mysqldb (MySQLmodule). Don't
use this.r N)r� r� r� r� r� r" r" r" r# r� 3 s r� c @ s e Zd ZdZdS )�CursorzjThis is the standard Cursor class that returns rows as tuples
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DictCursorzeThis is a Cursor class that returns rows as dictionaries and
stores the result set in the client.N)r� r� r� r� r" r" r" r# r� A s r� c @ s e Zd ZdZdS )�SSCursorz_This is a Cursor class that returns rows as tuples and stores
the result set in the server.N)r� r� r� r� r" r" r" r# r� G s r� c @ s e Zd ZdZdS )� SSDictCursorzeThis is a Cursor class that returns rows as dictionaries and
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