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Module to ensure SQLite usage prevents common mistakes, and best performance.
� )� annotations)�CallableNc �( � | j dd� y)z�Turns on write ahead logging
Reduces contention and improves write performance. WAL is
`described here <https://www.sqlite.org/wal.html>`__.
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connections �3/usr/lib/python3/dist-packages/apsw/bestpractice.py�connection_walr
s � � ���n�e�,� c �& � | j |� y)a\ Sets a short busy timeout
:param duration_ms: How many thousandths of a second to wait
When another thread or process has locked the database, SQLite
immediately raises :exc:`apsw.BusyError`. Changing the `busy
timeout <https://www.sqlite.org/c3ref/busy_timeout.html>`__ gives
a grace period during which SQLite retries.
N)�setbusytimeout)r � duration_mss r �connection_busy_timeoutr s � � � � �k�*r c �( � | j dd� y)z�Enables foreign key constraints
`Foreign keys <https://www.sqlite.org/foreignkeys.html>`__ need to
`be enabled <https://www.sqlite.org/foreignkeys.html#fk_enable>`__
to have an effect.
� foreign_keys�ONNr r
s r � connection_enable_foreign_keysr $ s � � ���n�d�+r c � � | j t j d� | j t j d� y)a= Double quotes are for identifiers only, not strings
Turns off `allowing double quoted strings
<https://www.sqlite.org/quirks.html#dblquote>`__ if they don't
match any identifier (column/table names etc), making it an error
to use double quotes around strings. SQL strings use single
quotes.
r N)�config�apsw�SQLITE_DBCONFIG_DQS_DML�SQLITE_DBCONFIG_DQS_DDLr
s r �connection_dqsr . s0 � � ���d�2�2�A�6����d�2�2�A�6r c �@ � t j j � y)zZForwards SQLite logging to Python logging module
See :meth:`apsw.ext.log_sqlite`
N)r �ext�
log_sqlite� r r �library_loggingr! ; s � �
�H�H���r �tuple[Callable, ...]� recommendedc �� �� g �| D ]6 }|j j d� r�j |� �0 |� �8 d�fd� }t j j |� y)z=Applies library immediately and connection to new connections� connection_c �$ �� �D ]
} || � � y )Nr )r �func�hookss �r � best_practise_connection_applyz-apply.<locals>.best_practise_connection_applyV s �� �� �D� �� � r N)r �apsw.Connection)�__name__�
startswith�appendr �connection_hooks)�whichr' r) r( s @r �applyr0 M sV �� � �E�� �� �=�=� #� #�M� 2� �L�L�� � �F� � � ��� � �!?�@r )r r* �return�None)�d )r r* r �intr1 r2 )r1 r2 )r/ r" r1 r2 )�__doc__�
__future__r �typingr r �apsw.extr
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