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U -?�f>� � @ s� d dl mZ d dlZd dlZd dlmZ d dlmZ d dlmZ d dlmZ d dlm Z d dlm Z d d lm Z d d lm Z d d lm Z d d lmZ d d lmZ d dlmZ d dlmZ ddlmZ ddlmZ ddlmZ ddlmZ ddlmZ ddlmZ ddlm Z ddlm Z ddlmZ ddlm Z ddlm Z dd l m!Z! dd l m"Z# dd l m$Z% dd l m&Z& dd l'm(Z( dd!l'm)Z) dd"lm*Z* dd#l+m,Z, dd$l-m.Z. dd%l-m/Z/ e�r�dd&l0m1Z1 dd'l2m3Z3 dd(l2m4Z4 dd)l2m5Z5 dd*l2m6Z6 dd+l2m7Z7 dd,l2m8Z8 dd-l2m9Z9 dd.l2m:Z: dd/l2m;Z; dd0l<m=Z= dd1l>m?Z? dd2l@mAZA dd3l@mBZB dd4lCmDZD dd5lEmFZF dd6lGmHZH e/d7�ZIed8ed9�ZJd:d;d<d=�d>d?�ZKdrdAdBd;d<dC�dDdE�ZLd:d;dFdG�dHdI�ZMG dJdK� dK�ZNe jOe!dLdMg g dNdOdPdQgdR�G dSdT� dTee! edT eN��ZPe jOe&dUdVg dWdXdYgdZd[dPd\d]d^d_gdR�G d`d<� d<ee& eN��ZQG dadb� dbee) edb �ZRe d<dcdd�dedf��ZSe dTdgdd�dhdf��ZSdidjdd�dkdf�ZSe �TeP�dTdldm�dndo��ZUe �TeQ�d<dldm�dpdq��ZVdS )s� )� annotationsN)�Any)� AsyncIterator)�Callable)�Dict)� Generator)�NoReturn)�Optional)�overload)�Tuple)�Type)� TYPE_CHECKING)�TypeVar)�Union� )�exc)�asyncstartablecontext)�GeneratorStartableContext)�ProxyComparable)�StartableContext)�_ensure_sync_result)� AsyncResult)�AsyncScalarResult� )� inspection)�util)� Connection)� create_engine)�create_pool_from_url)�Engine)�NestedTransaction)� Transaction)� ArgumentError)�greenlet_spawn)� Concatenate)� ParamSpec)� CursorResult)�_CoreAnyExecuteParams)�_CoreSingleExecuteParams)�_DBAPIAnyExecuteParams)�_ExecuteOptions)�CompiledCacheType)�CoreExecuteOptionsParameter)�Dialect)�IsolationLevel)�SchemaTranslateMapType)� ScalarResult)�URL)�Pool)�PoolProxiedConnection)� _InfoType)� Executable)�TypedReturnsRows�_P�_T)�boundzUnion[str, URL]r � AsyncEngine)�url�kw�returnc sr |� dd�rt�d��d|d< |�dd�� � r^|� dd�rBtd ��d d �� �fd d � }||d< t| f|��t��S )a Create a new async engine instance. Arguments passed to :func:`_asyncio.create_async_engine` are mostly identical to those passed to the :func:`_sa.create_engine` function. The specified dialect must be an asyncio-compatible dialect such as :ref:`dialect-postgresql-asyncpg`. .. versionadded:: 1.4 :param async_creator: an async callable which returns a driver-level asyncio connection. If given, the function should take no arguments, and return a new asyncio connection from the underlying asyncio database driver; the connection will be wrapped in the appropriate structures to be used with the :class:`.AsyncEngine`. Note that the parameters specified in the URL are not applied here, and the creator function should use its own connection parameters. This parameter is the asyncio equivalent of the :paramref:`_sa.create_engine.creator` parameter of the :func:`_sa.create_engine` function. .. versionadded:: 2.0.16 Zserver_side_cursorsFz}Can't set server_side_cursors for async engine globally; use the connection.stream() method for an async streaming result setT� _is_async� async_creatorN�creatorz?Can only specify one of 'async_creator' or 'creator', not both.r �r= c s �j jj� d�S )N)Zasync_creator_fn)�dialectZdbapi�connect� �r? � sync_enginerD �M/opt/hc_python/lib64/python3.8/site-packages/sqlalchemy/ext/asyncio/engine.pyr@ o s �z$create_async_engine.<locals>.creator)�get� async_excZAsyncMethodRequired�popr" �_create_enginer: )r; r< r@ rD rE rG �create_async_engineF s � � rL � sqlalchemy.zDict[str, Any]�str)� configuration�prefix�kwargsr= c s> � fdd�| � � D �}d|d< |�|� |�d�}t|f|�S )a� Create a new AsyncEngine instance using a configuration dictionary. This function is analogous to the :func:`_sa.engine_from_config` function in SQLAlchemy Core, except that the requested dialect must be an asyncio-compatible dialect such as :ref:`dialect-postgresql-asyncpg`. The argument signature of the function is identical to that of :func:`_sa.engine_from_config`. .. versionadded:: 1.4.29 c s, i | ]$\}}|� � �r|t� �d � |�qS �N)� startswith�len)�.0�key�value�rP rD rG � <dictcomp>� s � z,async_engine_from_config.<locals>.<dictcomp>TZ_coerce_configr; )�items�updaterJ rL )rO rP rQ �optionsr; rD rX rG �async_engine_from_config| s � r] r2 )r; rQ r= c K s d|d< t | f|�S )aV Create a new async engine instance. Arguments passed to :func:`_asyncio.create_async_pool_from_url` are mostly identical to those passed to the :func:`_sa.create_pool_from_url` function. The specified dialect must be an asyncio-compatible dialect such as :ref:`dialect-postgresql-asyncpg`. .. versionadded:: 2.0.10 Tr> )�_create_pool_from_url)r; rQ rD rD rG �create_async_pool_from_url� s r_ c @ s" e Zd ZdZedd�dd��ZdS )�AsyncConnectable)Z_slots_dispatch� __weakref__r rA c C s t d��d S )Nz�asynchronous events are not implemented at this time. Apply synchronous listeners to the AsyncEngine.sync_engine or AsyncConnection.sync_connection attributes.)�NotImplementedError)�clsrD rD rG �_no_async_engine_events� s �z(AsyncConnectable._no_async_engine_eventsN)�__name__� __module__� __qualname__� __slots__� classmethodrd rD rD rD rG r` � s r` z:class:`_engine.Connection`z!:class:`_asyncio.AsyncConnection`�closed� invalidatedrB �default_isolation_level)Z classmethods�methods� attributesc @ s4 e Zd ZU dZdZd�ddd�dd�Zded < d ed < ed d d �dd��Zd�dd d�dd�Z e dd�dd��Z dd�dd�Z e jd d�d d ��Ze jd d�d d ��Zd!d�d"d#�Zd!d�d$d%�Zd�d&d'd(�d)d*�Zd+d�d,d-�Zdd�d.d/�Zdd�d0d1�Zd2d�d3d4�Zd2d�d5d6�Zed7d7d7ddd7d7d7d7dd8� d9d:d+ddd;d;d;d<dd=d d>� d?d@��Zed=d dA�dBd@��Zd=d dA�dCd@�Zd'd�dDdE�Zd'd�dFdG�Z d'd�dHdI�Z d'd�dJdK�Z d�d:dLdMdNdO�dPdQ�Z ed�ddR�dSdTdMdUdO�dVdW��Z ed�ddR�dXdTdMdYdO�dZdW��Z e!d�ddR�dXdTdMd[dO�d\dW��Z ed�ddR�dSdTdMd]dO�d^d_��Z"ed�ddR�dXdTdMdNdO�d`d_��Z"d�ddR�dXdTdMdNdO�dad_�Z"ed�ddR�dbdcdMdddO�dedf��Z#ed�ddR�dXdcdMd=dO�dgdf��Z#d�ddR�dXdcdMd=dO�dhdf�Z#ed�ddR�dbdTdMdidO�djdk��Z$ed�ddR�dXdTdMdldO�dmdk��Z$d�ddR�dXdTdMdldO�dndk�Z$ed�ddR�dbdcdMdodO�dpdq��Z%ed�ddR�dXdcdMdrdO�dsdq��Z%e!d�ddR�dXdcdMdtdO�dudq��Z%dvdwdxdydz�d{d|�Z&d}d�d~d�Z'd=d=d=d'd��d�d��Z(e d=d�d�d���Z)e d=d�d�d���Z*e d�d�d�d���Z+e+j,d�d'd��d�d���Z+e d=d�d�d���Z-dS )��AsyncConnectiona� An asyncio proxy for a :class:`_engine.Connection`. :class:`_asyncio.AsyncConnection` is acquired using the :meth:`_asyncio.AsyncEngine.connect` method of :class:`_asyncio.AsyncEngine`:: from sqlalchemy.ext.asyncio import create_async_engine engine = create_async_engine("postgresql+asyncpg://user:pass@host/dbname") async with engine.connect() as conn: result = await conn.execute(select(table)) .. versionadded:: 1.4 )�enginerF �sync_connectionNr: zOptional[Connection])� async_enginerq c C s || _ |j| _| �|�| _d S rR )rp rF �_assign_proxiedrq )�selfrr rq rD rD rG �__init__� s zAsyncConnection.__init__rq r rF r ��targetr= c C s t t�|j�|�S rR )ro r: �_retrieve_proxy_for_targetrp �rc rw rD rD rG � _regenerate_proxy_for_target� s �z,AsyncConnection._regenerate_proxy_for_targetF�bool�� is_ctxmanagerr= c � s. | j rt�d��| �t| jj�I dH �| _ | S )zzStart this :class:`_asyncio.AsyncConnection` object's context outside of using a Python ``with:`` block. z connection is already startedN)rq r �InvalidRequestErrorrs r# rF rC �rt r} rD rD rG �start s �zAsyncConnection.startr rA c C s t �d��dS )zeNot implemented for async; call :meth:`_asyncio.AsyncConnection.get_raw_connection`. z�AsyncConnection.connection accessor is not implemented as the attribute may need to reconnect on an invalidated connection. Use the get_raw_connection() method.N)r r~ �rt rD rD rG � connection s �zAsyncConnection.connectionr3 c � s t t| jd�I dH S )a Return the pooled DBAPI-level connection in use by this :class:`_asyncio.AsyncConnection`. This is a SQLAlchemy connection-pool proxied connection which then has the attribute :attr:`_pool._ConnectionFairy.driver_connection` that refers to the actual driver connection. Its :attr:`_pool._ConnectionFairy.dbapi_connection` refers instead to an :class:`_engine.AdaptedConnection` instance that adapts the driver connection to the DBAPI protocol. r� N)r# �getattr�_proxiedr� rD rD rG �get_raw_connection s z"AsyncConnection.get_raw_connectionr4 c C s | j jS )a Return the :attr:`_engine.Connection.info` dictionary of the underlying :class:`_engine.Connection`. This dictionary is freely writable for user-defined state to be associated with the database connection. This attribute is only available if the :class:`.AsyncConnection` is currently connected. If the :attr:`.AsyncConnection.closed` attribute is ``True``, then accessing this attribute will raise :class:`.ResourceClosedError`. .. versionadded:: 1.4.0b2 )r� �infor� rD rD rG r� 0 s zAsyncConnection.infoc C s | j s| �� | j S rR )rq �_raise_for_not_startedr� rD rD rG r� B s zAsyncConnection._proxied�AsyncTransactionc C s | j s t�t| �S )z1Begin a transaction prior to autobegin occurring.�r� �AssertionErrorr� r� rD rD rG �beginH s zAsyncConnection.beginc C s | j s t�t| dd�S )z;Begin a nested transaction and return a transaction handle.T)�nestedr� r� rD rD rG � begin_nestedM s z AsyncConnection.begin_nestedzOptional[BaseException]�None)� exceptionr= c � s t | jj|d�I dH S )z�Invalidate the underlying DBAPI connection associated with this :class:`_engine.Connection`. See the method :meth:`_engine.Connection.invalidate` for full detail on this method. )r� N)r# r� � invalidate)rt r� rD rD rG r� R s �zAsyncConnection.invalidater. c � s t | jj�I d H S rR )r# r� �get_isolation_levelr� rD rD rG r� a s z#AsyncConnection.get_isolation_levelc C s | j �� S )z,Return True if a transaction is in progress.)r� �in_transactionr� rD rD rG r� d s z AsyncConnection.in_transactionc C s | j �� S )zYReturn True if a transaction is in progress. .. versionadded:: 1.4.0b2 )r� �in_nested_transactionr� rD rD rG r� i s z%AsyncConnection.in_nested_transactionzOptional[AsyncTransaction]c C s$ | j �� }|dk r t�|�S dS dS )a� Return an :class:`.AsyncTransaction` representing the current transaction, if any. This makes use of the underlying synchronous connection's :meth:`_engine.Connection.get_transaction` method to get the current :class:`_engine.Transaction`, which is then proxied in a new :class:`.AsyncTransaction` object. .. versionadded:: 1.4.0b2 N)r� �get_transactionr� rx �rt ZtransrD rD rG r� q s z AsyncConnection.get_transactionc C s$ | j �� }|dk r t�|�S dS dS )a� Return an :class:`.AsyncTransaction` representing the current nested (savepoint) transaction, if any. This makes use of the underlying synchronous connection's :meth:`_engine.Connection.get_nested_transaction` method to get the current :class:`_engine.Transaction`, which is then proxied in a new :class:`.AsyncTransaction` object. .. versionadded:: 1.4.0b2 N)r� �get_nested_transactionr� rx r� rD rD rG r� � s z&AsyncConnection.get_nested_transaction.) �compiled_cache� logging_token�isolation_level� no_parameters�stream_results�max_row_buffer� yield_per�insertmanyvalues_page_size�schema_translate_map�preserve_rowcount�Optional[CompiledCacheType]rN �int� Optional[SchemaTranslateMapType]r ) r� r� r� r� r� r� r� r� r� r� �optr= c � s d S rR rD ) rt r� r� r� r� r� r� r� r� r� r� r� rD rD rG �execution_options� s z!AsyncConnection.execution_options�r� r= c � s d S rR rD �rt r� rD rD rG r� � s c � s* | j }t|jf|�I dH }||ks&t�| S )a' Set non-SQL options for the connection which take effect during execution. This returns this :class:`_asyncio.AsyncConnection` object with the new options added. See :meth:`_engine.Connection.execution_options` for full details on this method. N)r� r# r� r� )rt r� �conn�c2rD rD rG r� � s c � s t | jj�I dH dS )a� Commit the transaction that is currently in progress. This method commits the current transaction if one has been started. If no transaction was started, the method has no effect, assuming the connection is in a non-invalidated state. A transaction is begun on a :class:`_engine.Connection` automatically whenever a statement is first executed, or when the :meth:`_engine.Connection.begin` method is called. N�r# r� �commitr� rD rD rG r� � s zAsyncConnection.commitc � s t | jj�I dH dS )a& Roll back the transaction that is currently in progress. This method rolls back the current transaction if one has been started. If no transaction was started, the method has no effect. If a transaction was started and the connection is in an invalidated state, the transaction is cleared using this method. A transaction is begun on a :class:`_engine.Connection` automatically whenever a statement is first executed, or when the :meth:`_engine.Connection.begin` method is called. N�r# r� �rollbackr� rD rD rG r� � s zAsyncConnection.rollbackc � s t | jj�I dH dS )z�Close this :class:`_asyncio.AsyncConnection`. This has the effect of also rolling back the transaction if one is in place. N�r# r� �closer� rD rD rG r� � s zAsyncConnection.closec � s | � � I dH dS )a A synonym for :meth:`_asyncio.AsyncConnection.close`. The :meth:`_asyncio.AsyncConnection.aclose` name is specifically to support the Python standard library ``@contextlib.aclosing`` context manager function. .. versionadded:: 2.0.20 N�r� r� rD rD rG �aclose� s zAsyncConnection.aclosez Optional[_DBAPIAnyExecuteParams]z%Optional[CoreExecuteOptionsParameter]zCursorResult[Any])� statement� parametersr� r= c � s. t | jj|||dd�I dH }t|| j�I dH S )zaExecutes a driver-level SQL string and return buffered :class:`_engine.Result`. T)�_require_awaitN)r# r� �exec_driver_sqlr �rt r� r� r� �resultrD rD rG r� � s � z AsyncConnection.exec_driver_sql�r� zTypedReturnsRows[_T]z Optional[_CoreAnyExecuteParams]z*GeneratorStartableContext[AsyncResult[_T]]c C s d S rR rD �rt r� r� r� rD rD rG �stream s zAsyncConnection.streamr5 z+GeneratorStartableContext[AsyncResult[Any]]c C s d S rR rD r� rD rD rG r� s z AsyncIterator[AsyncResult[Any]]c C s� | j jst�d��t| jj||tj� |ddi�dd�I dH }|j j sHt �t |�}z |V W n tk rn Y n X t�|�� �}t�|�I dH dS )aL Execute a statement and return an awaitable yielding a :class:`_asyncio.AsyncResult` object. E.g.:: result = await conn.stream(stmt): async for row in result: print(f"{row}") The :meth:`.AsyncConnection.stream` method supports optional context manager use against the :class:`.AsyncResult` object, as in:: async with conn.stream(stmt) as result: async for row in result: print(f"{row}") In the above pattern, the :meth:`.AsyncResult.close` method is invoked unconditionally, even if the iterator is interrupted by an exception throw. Context manager use remains optional, however, and the function may be called in either an ``async with fn():`` or ``await fn()`` style. .. versionadded:: 2.0.0b3 added context manager support :return: an awaitable object that will yield an :class:`_asyncio.AsyncResult` object. .. seealso:: :meth:`.AsyncConnection.stream_scalars` zmCant use `stream` or `stream_scalars` with the current dialect since it does not support server side cursors.r� T�r� r� N)rB Z supports_server_side_cursorsr r~ r# r� �executer � EMPTY_DICTZ merge_with�contextZ_is_server_sider� r � GeneratorExit�asyncio� create_taskr� �shield)rt r� r� r� r� �ar�taskrD rD rG r� s, *� �� zCursorResult[_T]c � s d S rR rD r� rD rD rG r� Y s zAsyncConnection.executec � s d S rR rD r� rD rD rG r� b s c � s. t | jj|||dd�I dH }t|| j�I dH S )a� Executes a SQL statement construct and return a buffered :class:`_engine.Result`. :param object: The statement to be executed. This is always an object that is in both the :class:`_expression.ClauseElement` and :class:`_expression.Executable` hierarchies, including: * :class:`_expression.Select` * :class:`_expression.Insert`, :class:`_expression.Update`, :class:`_expression.Delete` * :class:`_expression.TextClause` and :class:`_expression.TextualSelect` * :class:`_schema.DDL` and objects which inherit from :class:`_schema.ExecutableDDLElement` :param parameters: parameters which will be bound into the statement. This may be either a dictionary of parameter names to values, or a mutable sequence (e.g. a list) of dictionaries. When a list of dictionaries is passed, the underlying statement execution will make use of the DBAPI ``cursor.executemany()`` method. When a single dictionary is passed, the DBAPI ``cursor.execute()`` method will be used. :param execution_options: optional dictionary of execution options, which will be associated with the statement execution. This dictionary can provide a subset of the options that are accepted by :meth:`_engine.Connection.execution_options`. :return: a :class:`_engine.Result` object. Tr� N)r# r� r� r r� rD rD rG r� k s &� zTypedReturnsRows[Tuple[_T]]z"Optional[_CoreSingleExecuteParams]z Optional[_T]c � s d S rR rD r� rD rD rG �scalar� s zAsyncConnection.scalarc � s d S rR rD r� rD rD rG r� � s c � s | j |||d�I dH }|�� S )au Executes a SQL statement construct and returns a scalar object. This method is shorthand for invoking the :meth:`_engine.Result.scalar` method after invoking the :meth:`_engine.Connection.execute` method. Parameters are equivalent. :return: a scalar Python value representing the first column of the first row returned. r� N)r� r� r� rD rD rG r� � s � zScalarResult[_T]c � s d S rR rD r� rD rD rG �scalars� s zAsyncConnection.scalarszScalarResult[Any]c � s d S rR rD r� rD rD rG r� � s c � s | j |||d�I dH }|�� S )ai Executes a SQL statement construct and returns a scalar objects. This method is shorthand for invoking the :meth:`_engine.Result.scalars` method after invoking the :meth:`_engine.Connection.execute` method. Parameters are equivalent. :return: a :class:`_engine.ScalarResult` object. .. versionadded:: 1.4.24 r� N)r� r� r� rD rD rG r� � s � z0GeneratorStartableContext[AsyncScalarResult[_T]]c C s d S rR rD r� rD rD rG �stream_scalars� s z AsyncConnection.stream_scalarsz1GeneratorStartableContext[AsyncScalarResult[Any]]c C s d S rR rD r� rD rD rG r� � s z%AsyncIterator[AsyncScalarResult[Any]]c C s8 | j |||d�4 I dH �}|�� V W 5 Q I dH R X dS )af Execute a statement and return an awaitable yielding a :class:`_asyncio.AsyncScalarResult` object. E.g.:: result = await conn.stream_scalars(stmt) async for scalar in result: print(f"{scalar}") This method is shorthand for invoking the :meth:`_engine.AsyncResult.scalars` method after invoking the :meth:`_engine.Connection.stream` method. Parameters are equivalent. The :meth:`.AsyncConnection.stream_scalars` method supports optional context manager use against the :class:`.AsyncScalarResult` object, as in:: async with conn.stream_scalars(stmt) as result: async for scalar in result: print(f"{scalar}") In the above pattern, the :meth:`.AsyncScalarResult.close` method is invoked unconditionally, even if the iterator is interrupted by an exception throw. Context manager use remains optional, however, and the function may be called in either an ``async with fn():`` or ``await fn()`` style. .. versionadded:: 2.0.0b3 added context manager support :return: an awaitable object that will yield an :class:`_asyncio.AsyncScalarResult` object. .. versionadded:: 1.4.24 .. seealso:: :meth:`.AsyncConnection.stream` r� N)r� r� r� rD rD rG r� � s 0 �z)Callable[Concatenate[Connection, _P], _T]z_P.argsz _P.kwargsr8 )�fn�argr< r= c � s" t || jf|�ddi|��I dH S )aY Invoke the given synchronous (i.e. not async) callable, passing a synchronous-style :class:`_engine.Connection` as the first argument. This method allows traditional synchronous SQLAlchemy functions to run within the context of an asyncio application. E.g.:: def do_something_with_core(conn: Connection, arg1: int, arg2: str) -> str: '''A synchronous function that does not require awaiting :param conn: a Core SQLAlchemy Connection, used synchronously :return: an optional return value is supported ''' conn.execute( some_table.insert().values(int_col=arg1, str_col=arg2) ) return "success" async def do_something_async(async_engine: AsyncEngine) -> None: '''an async function that uses awaiting''' async with async_engine.begin() as async_conn: # run do_something_with_core() with a sync-style # Connection, proxied into an awaitable return_code = await async_conn.run_sync(do_something_with_core, 5, "strval") print(return_code) This method maintains the asyncio event loop all the way through to the database connection by running the given callable in a specially instrumented greenlet. The most rudimentary use of :meth:`.AsyncConnection.run_sync` is to invoke methods such as :meth:`_schema.MetaData.create_all`, given an :class:`.AsyncConnection` that needs to be provided to :meth:`_schema.MetaData.create_all` as a :class:`_engine.Connection` object:: # run metadata.create_all(conn) with a sync-style Connection, # proxied into an awaitable with async_engine.begin() as conn: await conn.run_sync(metadata.create_all) .. note:: The provided callable is invoked inline within the asyncio event loop, and will block on traditional IO calls. IO within this callable should only call into SQLAlchemy's asyncio database APIs which will be properly adapted to the greenlet context. .. seealso:: :meth:`.AsyncSession.run_sync` :ref:`session_run_sync` r� FN)r# r� )rt r� r� r< rD rD rG �run_sync2 s D ����zAsyncConnection.run_syncz%Generator[Any, None, AsyncConnection]c C s | � � �� S rR )r� � __await__r� rD rD rG r� z s zAsyncConnection.__await__��type_rW � tracebackr= c � s" t �| �� �}t �|�I d H d S rR )r� r� r� r� )rt r� rW r� r� rD rD rG � __aexit__} s zAsyncConnection.__aexit__c C s | j jS )z�Return True if this connection is closed. .. container:: class_bases Proxied for the :class:`_engine.Connection` class on behalf of the :class:`_asyncio.AsyncConnection` class. )r� rj r� rD rD rG rj � s zAsyncConnection.closedc C s | j jS )aT Return True if this connection was invalidated. .. container:: class_bases Proxied for the :class:`_engine.Connection` class on behalf of the :class:`_asyncio.AsyncConnection` class. This does not indicate whether or not the connection was invalidated at the pool level, however )r� rk r� rD rD rG rk � s zAsyncConnection.invalidatedr- c C s | j jS )z�Proxy for the :attr:`_engine.Connection.dialect` attribute on behalf of the :class:`_asyncio.AsyncConnection` class. �r� rB r� rD rD rG rB � s zAsyncConnection.dialect��attrr= c C s || j _d S rR r� �rt r� rD rD rG rB � s c C s | j jS )a� The initial-connection time isolation level associated with the :class:`_engine.Dialect` in use. .. container:: class_bases Proxied for the :class:`_engine.Connection` class on behalf of the :class:`_asyncio.AsyncConnection` class. This value is independent of the :paramref:`.Connection.execution_options.isolation_level` and :paramref:`.Engine.execution_options.isolation_level` execution options, and is determined by the :class:`_engine.Dialect` when the first connection is created, by performing a SQL query against the database for the current isolation level before any additional commands have been emitted. Calling this accessor does not invoke any new SQL queries. .. seealso:: :meth:`_engine.Connection.get_isolation_level` - view current actual isolation level :paramref:`_sa.create_engine.isolation_level` - set per :class:`_engine.Engine` isolation level :paramref:`.Connection.execution_options.isolation_level` - set per :class:`_engine.Connection` isolation level )r� rl r� rD rD rG rl � s "z'AsyncConnection.default_isolation_level)N)F)N)NN)N)N)N)N)N)N)N)N)N)N)N)N)N)N)N).re rf rg �__doc__rh ru �__annotations__ri rz r� �propertyr� r� r �ro_non_memoized_propertyr� r� r� r� r� r� r� r� r� r� r r� r� r� r� r� r� r� r r� r� r� r� r� r� r� rj rk rB �setterrl rD rD rD rG ro � s � � ��* � �� �� ��B �� �� ��/ �� �� �� �� �� �� �� �� ��4H ro z:class:`_engine.Engine`z :class:`_asyncio.AsyncEngine`�clear_compiled_cache�update_execution_options�get_execution_optionsr; �poolrp �name�driver�echoc @ s� e Zd ZU dZdZeZded< ded< dd�dd�Ze j dd �d d ��Z e dd d �d d��Z ejdd �dd��Zdd �dd�Zdd �dd�Zedddddd�ddd d d d d d �d!d"��Zed d d#�d$d"��Zd d d#�d%d"�ZdJd'd(d)�d*d+�Zd(d �d,d-�Zd d(d#�d.d/�Zd0d �d1d2�Zed3d �d4d5��Zejd3d(d6�d7d5��Zed8d �d9d:��Z e jd8d(d6�d;d:��Z ed<d �d=d>��Z e jd<d(d6�d?d>��Z ed d �d@dA��Z ed d �dBdC��Z ed d �dDdE��Z ed d �dFdG��Z!e!jd d(d6�dHdG��Z!dIS )Kr: aP An asyncio proxy for a :class:`_engine.Engine`. :class:`_asyncio.AsyncEngine` is acquired using the :func:`_asyncio.create_async_engine` function:: from sqlalchemy.ext.asyncio import create_async_engine engine = create_async_engine("postgresql+asyncpg://user:pass@host/dbname") .. versionadded:: 1.4 rF zType[AsyncConnection]�_connection_clsr �rF c C s. |j js t�d|j j�d���| �|�| _d S )NzFThe asyncio extension requires an async driver to be used. The loaded z is not async.)rB Zis_asyncr r~ r� rs rF )rt rF rD rD rG ru s �zAsyncEngine.__init__rA c C s | j S rR r� r� rD rD rG r� s zAsyncEngine._proxiedrv c C s t |�S rR )r: ry rD rD rG rz s z(AsyncEngine._regenerate_proxy_for_targetz AsyncIterator[AsyncConnection]c C sR | � � }|4 I dH �. |�� 4 I dH � |V W 5 Q I dH R X W 5 Q I dH R X dS )a� Return a context manager which when entered will deliver an :class:`_asyncio.AsyncConnection` with an :class:`_asyncio.AsyncTransaction` established. E.g.:: async with async_engine.begin() as conn: await conn.execute( text("insert into table (x, y, z) values (1, 2, 3)") ) await conn.execute(text("my_special_procedure(5)")) N)rC r� )rt r� rD rD rG r� s zAsyncEngine.beginro c C s | � | �S )a Return an :class:`_asyncio.AsyncConnection` object. The :class:`_asyncio.AsyncConnection` will procure a database connection from the underlying connection pool when it is entered as an async context manager:: async with async_engine.connect() as conn: result = await conn.execute(select(user_table)) The :class:`_asyncio.AsyncConnection` may also be started outside of a context manager by invoking its :meth:`_asyncio.AsyncConnection.start` method. )r� r� rD rD rG rC + s zAsyncEngine.connectr3 c � s t | jj�I dH S )zReturn a "raw" DBAPI connection from the connection pool. .. seealso:: :ref:`dbapi_connections` N)r# rF �raw_connectionr� rD rD rG r� = s zAsyncEngine.raw_connection.)r� r� r� r� r� r� rN r. r� r� r )r� r� r� r� r� r� r= c K s d S rR rD )rt r� r� r� r� r� r� rD rD rG r� G s z AsyncEngine.execution_optionsr� c K s d S rR rD r� rD rD rG r� S s c K s t | jjf |��S )a Return a new :class:`_asyncio.AsyncEngine` that will provide :class:`_asyncio.AsyncConnection` objects with the given execution options. Proxied from :meth:`_engine.Engine.execution_options`. See that method for details. )r: rF r� r� rD rD rG r� V s Tr{ r� )r� r= c � s t | jj|d�I dH dS )aE Dispose of the connection pool used by this :class:`_asyncio.AsyncEngine`. :param close: if left at its default of ``True``, has the effect of fully closing all **currently checked in** database connections. Connections that are still checked out will **not** be closed, however they will no longer be associated with this :class:`_engine.Engine`, so when they are closed individually, eventually the :class:`_pool.Pool` which they are associated with will be garbage collected and they will be closed out fully, if not already closed on checkin. If set to ``False``, the previous connection pool is de-referenced, and otherwise not touched in any way. .. seealso:: :meth:`_engine.Engine.dispose` r� N)r# rF �dispose)rt r� rD rD rG r� b s zAsyncEngine.disposec C s | j �� S )a- Clear the compiled cache associated with the dialect. .. container:: class_bases Proxied for the :class:`_engine.Engine` class on behalf of the :class:`_asyncio.AsyncEngine` class. This applies **only** to the built-in cache that is established via the :paramref:`_engine.create_engine.query_cache_size` parameter. It will not impact any dictionary caches that were passed via the :paramref:`.Connection.execution_options.compiled_cache` parameter. .. versionadded:: 1.4 )r� r� r� rD rD rG r� � s z AsyncEngine.clear_compiled_cachec K s | j jf |�S )a� Update the default execution_options dictionary of this :class:`_engine.Engine`. .. container:: class_bases Proxied for the :class:`_engine.Engine` class on behalf of the :class:`_asyncio.AsyncEngine` class. The given keys/values in \**opt are added to the default execution options that will be used for all connections. The initial contents of this dictionary can be sent via the ``execution_options`` parameter to :func:`_sa.create_engine`. .. seealso:: :meth:`_engine.Connection.execution_options` :meth:`_engine.Engine.execution_options` )r� r� r� rD rD rG r� � s z$AsyncEngine.update_execution_optionsr* c C s | j �� S )aU Get the non-SQL options which will take effect during execution. .. container:: class_bases Proxied for the :class:`_engine.Engine` class on behalf of the :class:`_asyncio.AsyncEngine` class. .. versionadded: 1.3 .. seealso:: :meth:`_engine.Engine.execution_options` )r� r� r� rD rD rG r� � s z!AsyncEngine.get_execution_optionsr1 c C s | j jS )zzProxy for the :attr:`_engine.Engine.url` attribute on behalf of the :class:`_asyncio.AsyncEngine` class. �r� r; r� rD rD rG r; � s zAsyncEngine.urlr� c C s || j _d S rR r� r� rD rD rG r; � s r2 c C s | j jS )z{Proxy for the :attr:`_engine.Engine.pool` attribute on behalf of the :class:`_asyncio.AsyncEngine` class. �r� r� r� rD rD rG r� � s zAsyncEngine.poolc C s || j _d S rR r� r� rD rD rG r� � s r- c C s | j jS )z~Proxy for the :attr:`_engine.Engine.dialect` attribute on behalf of the :class:`_asyncio.AsyncEngine` class. r� r� rD rD rG rB � s zAsyncEngine.dialectc C s || j _d S rR r� r� rD rD rG rB � s c C s | j jS )aI Returns this :class:`.Engine`. .. container:: class_bases Proxied for the :class:`_engine.Engine` class on behalf of the :class:`_asyncio.AsyncEngine` class. Used for legacy schemes that accept :class:`.Connection` / :class:`.Engine` objects within the same variable. )r� rp r� rD rD rG rp � s zAsyncEngine.enginec C s | j jS )a String name of the :class:`~sqlalchemy.engine.interfaces.Dialect` in use by this :class:`Engine`. .. container:: class_bases Proxied for the :class:`_engine.Engine` class on behalf of the :class:`_asyncio.AsyncEngine` class. )r� r� r� rD rD rG r� � s zAsyncEngine.namec C s | j jS )a Driver name of the :class:`~sqlalchemy.engine.interfaces.Dialect` in use by this :class:`Engine`. .. container:: class_bases Proxied for the :class:`_engine.Engine` class on behalf of the :class:`_asyncio.AsyncEngine` class. )r� r� r� rD rD rG r� s zAsyncEngine.driverc C s | j jS )a3 When ``True``, enable log output for this element. .. container:: class_bases Proxied for the :class:`_engine.Engine` class on behalf of the :class:`_asyncio.AsyncEngine` class. This has the effect of setting the Python logging level for the namespace of this element's class and object reference. A value of boolean ``True`` indicates that the loglevel ``logging.INFO`` will be set for the logger, whereas the string value ``debug`` will set the loglevel to ``logging.DEBUG``. �r� r� r� rD rD rG r� s zAsyncEngine.echoc C s || j _d S rR r� r� rD rD rG r� ) s N)T)"re rf rg r� rh ro r� r� ru r r� r� ri rz � contextlib�asynccontextmanagerr� rC r� r r� r� r� r� r� r� r; r� r� rB rp r� r� r� rD rD rD rG r: � sb � c @ s� e Zd ZU dZdZded< ded< ded< d'ddd �d d �Zed d d�dd��Ze j d d�dd��Z e dd�dd��Z e dd�dd��Zdd�dd�Zdd�dd �Zdd�d d �Zd(dd d �d d!�Zd"d"d"dd#�d$d%�Zd&S ))r� z4An asyncio proxy for a :class:`_engine.Transaction`.�r� �sync_transactionr� zOptional[Transaction]r� ro r� r{ r� F)r� r� c C s || _ d | _|| _d S rR r� )rt r� r� rD rD rG ru ; s zAsyncTransaction.__init__r! rv c C sP |j }|}t|t�}t�|�}|d k s*t�| �| �}||_ |�|�|_||_ |S rR ) r� � isinstancer ro rx r� �__new__rs r� r� )rc rw rq r� r� Zasync_connection�objrD rD rG rz @ s � z-AsyncTransaction._regenerate_proxy_for_targetrA c C s | j s| �� | j S rR )r� r� r� rD rD rG r� S s zAsyncTransaction._proxiedc C s | j jS rR )r� �is_validr� rD rD rG r� Y s zAsyncTransaction.is_validc C s | j jS rR )r� � is_activer� rD rD rG r� ] s zAsyncTransaction.is_activer� c � s t | jj�I dH dS )a@ Close this :class:`.AsyncTransaction`. If this transaction is the base transaction in a begin/commit nesting, the transaction will rollback(). Otherwise, the method returns. This is used to cancel a Transaction without affecting the scope of an enclosing transaction. Nr� r� rD rD rG r� a s zAsyncTransaction.closec � s t | jj�I dH dS )z*Roll back this :class:`.AsyncTransaction`.Nr� r� rD rD rG r� n s zAsyncTransaction.rollbackc � s t | jj�I dH dS )z'Commit this :class:`.AsyncTransaction`.Nr� r� rD rD rG r� r s zAsyncTransaction.commitr| c � s> | � t| jr| jjjn| jjj�I dH �| _|r:| j�� | S )z{Start this :class:`_asyncio.AsyncTransaction` object's context outside of using a Python ``with:`` block. N) rs r# r� r� r� r� r� r� � __enter__r rD rD rG r� w s � �� zAsyncTransaction.startr r� c � s t | jj|||�I d H d S rR )r# r� �__exit__)rt r� rW r� rD rD rG r� � s zAsyncTransaction.__aexit__N)F)F)re rf rg r� rh r� ru ri rz r r� r� r� r� r� r� r� r� r� r� rD rD rD rG r� 0 s& r� r )rr r= c C s d S rR rD �rr rD rD rG � _get_sync_engine_or_connection� s r� r c C s d S rR rD r� rD rD rG r� � s z#Union[AsyncEngine, AsyncConnection]zUnion[Engine, Connection]c C sP t | t�r| jS z| jW S tk rJ } zt�d| �|�W 5 d }~X Y nX d S )Nz AsyncEngine expected, got %r)r� ro r� rF �AttributeErrorr r" )rr �erD rD rG r� � s ��r )�subjectr= c C s t jddd��d S )Nz�Inspection on an AsyncConnection is currently not supported. Please use ``run_sync`` to pass a callable where it's possible to call ``inspect`` on the passed connection.�xd3s��code�r ZNoInspectionAvailable�r� rD rD rG �_no_insp_for_async_conn_yet� s �r� c C s t jddd��d S )Nz�Inspection on an AsyncEngine is currently not supported. Please obtain a connection then use ``conn.run_sync`` to pass a callable where it's possible to call ``inspect`` on the passed connection.r� r� r� r� rD rD rG � _no_insp_for_async_engine_xyet� s �r� )rM )W� __future__r r� r� �typingr r r r r r r r r r r r r � r rI �baser r r r r� r r r r r rp r r rK r r^ r Z engine.baser r! r" Zutil.concurrencyr# Z util.typingr$ r% Z engine.cursorr& Zengine.interfacesr' r( r) r* r+ r, r- r. r/ Z engine.resultr0 Z engine.urlr1 r� r2 r3 Z sql._typingr4 Zsql.baser5 Zsql.selectabler6 r7 r8 rL r] r_ r` Zcreate_proxy_methodsro r: r� r� Z _inspectsr� r� rD rD rD rG �<module> s� 7 � �� � !�� N �\