o
    ?ÊÆh0  ã                   @   sà   d Z ddlZddlmZ ddlmZ ddlmZ ddlm	Z	 dd	lm
Z
 dd
lmZ ddlmZ ddlmZ G dd„ dƒZG dd„ deƒZG dd„ deƒZG dd„ deƒZG dd„ dƒZG dd„ deƒZG dd„ deƒZeZdS )aZ
  

.. dialect:: sqlite+aiosqlite
    :name: aiosqlite
    :dbapi: aiosqlite
    :connectstring: sqlite+aiosqlite:///file_path
    :url: https://pypi.org/project/aiosqlite/

The aiosqlite dialect provides support for the SQLAlchemy asyncio interface
running on top of pysqlite.

aiosqlite is a wrapper around pysqlite that uses a background thread for
each connection.   It does not actually use non-blocking IO, as SQLite
databases are not socket-based.  However it does provide a working asyncio
interface that's useful for testing and prototyping purposes.

Using a special asyncio mediation layer, the aiosqlite dialect is usable
as the backend for the :ref:`SQLAlchemy asyncio <asyncio_toplevel>`
extension package.

This dialect should normally be used only with the
:func:`_asyncio.create_async_engine` engine creation function::

    from sqlalchemy.ext.asyncio import create_async_engine
    engine = create_async_engine("sqlite+aiosqlite:///filename")

The URL passes through all arguments to the ``pysqlite`` driver, so all
connection arguments are the same as they are for that of :ref:`pysqlite`.

.. _aiosqlite_udfs:

User-Defined Functions
----------------------

aiosqlite extends pysqlite to support async, so we can create our own user-defined functions (UDFs)
in Python and use them directly in SQLite queries as described here: :ref:`pysqlite_udfs`.

.. _aiosqlite_serializable:

Serializable isolation / Savepoints / Transactional DDL (asyncio version)
-------------------------------------------------------------------------

Similarly to pysqlite, aiosqlite does not support SAVEPOINT feature.

The solution is similar to :ref:`pysqlite_serializable`. This is achieved by the event listeners in async::

    from sqlalchemy import create_engine, event
    from sqlalchemy.ext.asyncio import create_async_engine

    engine = create_async_engine("sqlite+aiosqlite:///myfile.db")

    @event.listens_for(engine.sync_engine, "connect")
    def do_connect(dbapi_connection, connection_record):
        # disable aiosqlite's emitting of the BEGIN statement entirely.
        # also stops it from emitting COMMIT before any DDL.
        dbapi_connection.isolation_level = None

    @event.listens_for(engine.sync_engine, "begin")
    def do_begin(conn):
        # emit our own BEGIN
        conn.exec_driver_sql("BEGIN")

.. warning:: When using the above recipe, it is advised to not use the
   :paramref:`.Connection.execution_options.isolation_level` setting on
   :class:`_engine.Connection` and :func:`_sa.create_engine`
   with the SQLite driver,
   as this function necessarily will also alter the ".isolation_level" setting.

é    N)Úpartialé   )ÚSQLiteExecutionContext)ÚSQLiteDialect_pysqliteé   )Úpool)Úutil)ÚAdaptedConnection)Úawait_fallback)Ú
await_onlyc                   @   s`   e Zd ZdZdZdd„ Zdd„ Zddd	„Zd
d„ Zdd„ Z	dd„ Z
dd„ Zddd„Zdd„ ZdS )ÚAsyncAdapt_aiosqlite_cursor)Ú_adapt_connectionÚ_connectionÚdescriptionÚawait_Ú_rowsÚ	arraysizeÚrowcountÚ	lastrowidFc                 C   s2   || _ |j| _|j| _d| _d| _d | _g | _d S )Nr   éÿÿÿÿ)r   r   r   r   r   r   r   )ÚselfÚadapt_connection© r   úq/var/www/html/HyperOracle/crypto_trader/venv/lib/python3.10/site-packages/sqlalchemy/dialects/sqlite/aiosqlite.pyÚ__init__m   s   
z$AsyncAdapt_aiosqlite_cursor.__init__c                 C   s   g | j d d …< d S ©N©r   ©r   r   r   r   Úclosev   s   z!AsyncAdapt_aiosqlite_cursor.closeNc              
   C   sÞ   zU|   | j ¡ ¡}|d u r|   | |¡¡ n	|   | ||¡¡ |jr8|j| _d | _| _| js7|   | ¡ ¡| _	nd | _|j| _|j| _| jsP|   | 
¡ ¡ W d S || _W d S  tyn } z| j |¡ W Y d }~d S d }~ww )Nr   )r   r   ÚcursorÚexecuter   r   r   Úserver_sideÚfetchallr   r   Ú_cursorÚ	Exceptionr   Ú_handle_exception)r   Ú	operationÚ
parametersr#   Úerrorr   r   r   r    y   s*   €€ÿz#AsyncAdapt_aiosqlite_cursor.executec              
   C   s€   z&|   | j ¡ ¡}|   | ||¡¡ d | _|j| _|j| _|   | ¡ ¡ W d S  ty? } z| j	 
|¡ W Y d }~d S d }~ww r   )r   r   r   Úexecutemanyr   r   r   r   r$   r   r%   )r   r&   Úseq_of_parametersr#   r(   r   r   r   r)   ”   s   €ÿz'AsyncAdapt_aiosqlite_cursor.executemanyc                 G   s   d S r   r   )r   Ú
inputsizesr   r   r   ÚsetinputsizesŸ   s   z)AsyncAdapt_aiosqlite_cursor.setinputsizesc                 c   s$   � | j r| j  d¡V  | j sd S d S ©Nr   ©r   Úpopr   r   r   r   Ú__iter__¢   s   €ÿz$AsyncAdapt_aiosqlite_cursor.__iter__c                 C   s   | j r	| j  d¡S d S r-   r.   r   r   r   r   Úfetchone¦   s   z$AsyncAdapt_aiosqlite_cursor.fetchonec                 C   s8   |d u r| j }| jd|… }| j|d … | jd d …< |S r-   )r   r   )r   ÚsizeÚretvalr   r   r   Ú	fetchmany¬   s
   z%AsyncAdapt_aiosqlite_cursor.fetchmanyc                 C   s    | j d d … }g | j d d …< |S r   r   )r   r3   r   r   r   r"   ´   s   z$AsyncAdapt_aiosqlite_cursor.fetchallr   )Ú__name__Ú
__module__Ú__qualname__Ú	__slots__r!   r   r   r    r)   r,   r0   r1   r4   r"   r   r   r   r   r   \   s    	

r   c                       sF   e Zd ZdZdZ‡ fdd„Zdd„ Zdd„ Zdd
d„Zdd„ Z	‡  Z
S )ÚAsyncAdapt_aiosqlite_ss_cursorr#   Tc                    s   t ƒ j|i |¤Ž d | _d S r   )Úsuperr   r#   )r   ÚargÚkw©Ú	__class__r   r   r   Á   s   
z'AsyncAdapt_aiosqlite_ss_cursor.__init__c                 C   s(   | j d ur|  | j  ¡ ¡ d | _ d S d S r   )r#   r   r   r   r   r   r   r   Å   s   

þz$AsyncAdapt_aiosqlite_ss_cursor.closec                 C   ó   |   | j ¡ ¡S r   )r   r#   r1   r   r   r   r   r1   Ê   ó   z'AsyncAdapt_aiosqlite_ss_cursor.fetchoneNc                 C   s"   |d u r| j }|  | jj|d�¡S )N)r2   )r   r   r#   r4   )r   r2   r   r   r   r4   Í   s   z(AsyncAdapt_aiosqlite_ss_cursor.fetchmanyc                 C   r?   r   )r   r#   r"   r   r   r   r   r"   Ò   r@   z'AsyncAdapt_aiosqlite_ss_cursor.fetchallr   )r5   r6   r7   r8   r!   r   r   r1   r4   r"   Ú__classcell__r   r   r=   r   r9   º   s    
r9   c                   @   st   e Zd ZeeƒZdZdd„ Zedd„ ƒZ	e	j
dd„ ƒZ	dd„ Zdd
d„Zdd„ Zdd„ Zdd„ Zdd„ Zdd„ ZdS )ÚAsyncAdapt_aiosqlite_connection)Údbapic                 C   s   || _ || _d S r   )rC   r   )r   rC   Ú
connectionr   r   r   r   Ú   s   
z(AsyncAdapt_aiosqlite_connection.__init__c                 C   s   | j jS r   )r   Úisolation_levelr   r   r   r   rE   Þ   s   z/AsyncAdapt_aiosqlite_connection.isolation_levelc              
   C   st   dd„ }t || jj|ƒ}t ¡  ¡ }| jj ||f¡ z|  |¡W S  t	y9 } z|  
|¡ W Y d }~d S d }~ww )Nc                 S   s
   || _ d S r   )rE   )rD   Úvaluer   r   r   Úset_isoé   s   
z@AsyncAdapt_aiosqlite_connection.isolation_level.<locals>.set_iso)r   r   Ú_connÚasyncioÚget_event_loopÚcreate_futureÚ_txÚ
put_nowaitr   r$   r%   )r   rF   rG   ÚfunctionÚfuturer(   r   r   r   rE   â   s   €ÿc              
   O   sP   z|   | jj|i |¤Ž¡ W d S  ty' } z|  |¡ W Y d }~d S d }~ww r   )r   r   Úcreate_functionr$   r%   )r   Úargsr<   r(   r   r   r   rP   ö   s   €ÿz/AsyncAdapt_aiosqlite_connection.create_functionFc                 C   s   |rt | ƒS t| ƒS r   )r9   r   )r   r!   r   r   r   r   ü   s   z&AsyncAdapt_aiosqlite_connection.cursorc                 O   s   |   | jj|i |¤Ž¡S r   )r   r   r    )r   rQ   r<   r   r   r   r      s   z'AsyncAdapt_aiosqlite_connection.executec              
   C   óH   z|   | j ¡ ¡ W d S  ty# } z|  |¡ W Y d }~d S d }~ww r   )r   r   Úrollbackr$   r%   ©r   r(   r   r   r   rS     ó   €ÿz(AsyncAdapt_aiosqlite_connection.rollbackc              
   C   rR   r   )r   r   Úcommitr$   r%   rT   r   r   r   rV     rU   z&AsyncAdapt_aiosqlite_connection.commitc              
   C   sZ   z|   | j ¡ ¡ W d S  ty   Y d S  ty, } z|  |¡ W Y d }~d S d }~ww r   )r   r   r   Ú
ValueErrorr$   r%   rT   r   r   r   r     s   	€ÿz%AsyncAdapt_aiosqlite_connection.closec                 C   s,   t |tƒr|jd dkr| jj d¡|‚|‚)Nr   úno active connection)Ú
isinstancerW   rQ   rC   ÚsqliteÚOperationalErrorrT   r   r   r   r%   !  s   ÿÿþz1AsyncAdapt_aiosqlite_connection._handle_exceptionN)F)r5   r6   r7   Ústaticmethodr   r   r8   r   ÚpropertyrE   ÚsetterrP   r   r    rS   rV   r   r%   r   r   r   r   rB   Ö   s    


rB   c                   @   s   e Zd ZdZeeƒZdS )Ú'AsyncAdaptFallback_aiosqlite_connectionr   N)r5   r6   r7   r8   r\   r
   r   r   r   r   r   r_   -  s    r_   c                   @   s$   e Zd Zdd„ Zdd„ Zdd„ ZdS )ÚAsyncAdapt_aiosqlite_dbapic                 C   s   || _ || _d| _|  ¡  d S )NÚqmark)Ú	aiosqliterZ   Ú
paramstyleÚ_init_dbapi_attributes)r   rb   rZ   r   r   r   r   4  s   z#AsyncAdapt_aiosqlite_dbapi.__init__c                 C   s^   dD ]}t | |t| j|ƒƒ qdD ]}t | |t| j|ƒƒ qdD ]}t | |t| j|ƒƒ q d S )N)ÚDatabaseErrorÚErrorÚIntegrityErrorÚNotSupportedErrorr[   ÚProgrammingErrorÚsqlite_versionÚsqlite_version_info)ÚPARSE_COLNAMESÚPARSE_DECLTYPES)ÚBinary)ÚsetattrÚgetattrrb   rZ   )r   Únamer   r   r   rd   :  s   
ÿz1AsyncAdapt_aiosqlite_dbapi._init_dbapi_attributesc                 O   sj   |  dd¡}|  dd ¡}|r||i |¤Ž}n| jj|i |¤Ž}d|_t |¡r.t| t|ƒƒS t| t	|ƒƒS )NÚasync_fallbackFÚasync_creator_fnT)
r/   rb   ÚconnectÚdaemonr   Úasboolr_   r
   rB   r   )r   r;   r<   rr   Ú
creator_fnrD   r   r   r   rt   M  s   
þþz"AsyncAdapt_aiosqlite_dbapi.connectN)r5   r6   r7   r   rd   rt   r   r   r   r   r`   3  s    r`   c                   @   s   e Zd Zdd„ ZdS )Ú SQLiteExecutionContext_aiosqlitec                 C   s   | j jdd�S )NT)r!   )Ú_dbapi_connectionr   r   r   r   r   Úcreate_server_side_cursore  s   z:SQLiteExecutionContext_aiosqlite.create_server_side_cursorN)r5   r6   r7   rz   r   r   r   r   rx   d  s    rx   c                       sP   e Zd ZdZdZdZdZeZe	dd„ ƒZ
e	dd„ ƒZ‡ fdd„Zd	d
„ Z‡  ZS )ÚSQLiteDialect_aiosqliterb   Tc                 C   s   t tdƒtdƒƒS )Nrb   Úsqlite3)r`   Ú
__import__)Úclsr   r   r   Úimport_dbapis  s   ÿz$SQLiteDialect_aiosqlite.import_dbapic                 C   s   |   |¡rtjS tjS r   )Ú_is_url_file_dbr   ÚNullPoolÚ
StaticPool)r~   Úurlr   r   r   Úget_pool_classy  s   
z&SQLiteDialect_aiosqlite.get_pool_classc                    s.   t || jjƒrdt|ƒv rdS tƒ  |||¡S )NrX   T)rY   rC   r[   Ústrr:   Úis_disconnect)r   ÚerD   r   r=   r   r   r†   €  s   ÿz%SQLiteDialect_aiosqlite.is_disconnectc                 C   s   |j S r   )r   )r   rD   r   r   r   Úget_driver_connectionˆ  s   z-SQLiteDialect_aiosqlite.get_driver_connection)r5   r6   r7   ÚdriverÚsupports_statement_cacheÚis_asyncÚsupports_server_side_cursorsrx   Úexecution_ctx_clsÚclassmethodr   r„   r†   rˆ   rA   r   r   r=   r   r{   i  s    

r{   )Ú__doc__rI   Ú	functoolsr   Úbaser   Úpysqliter   Ú r   r   Úenginer	   Úutil.concurrencyr
   r   r   r9   rB   r_   r`   rx   r{   Údialectr   r   r   r   Ú<module>   s$   	F^W1#