The sqlite3 module internally uses a statement cache to avoid SQL parsing
#Create sqlite database manual#
You can, however, subclass the Connection class and makeĬonnect() use your class instead by providing your class for the factoryĬonsult the section SQLite and Python types of this manual for details. Writing operations should be serialized by the user to avoid data corruption.īy default, the sqlite3 module uses its Connection class for theĬonnect call. When using multiple threads with the same connection If set False, the returned connection may be sharedĪcross multiple threads. Inīy default, check_same_thread is True and only the creating thread may Due to SQLite behaviour, types can’t be detected for generatedįields (for example max(data)), even when detect_types parameter is set. off, no type detection), you can set it toĪny combination of PARSE_DECLTYPES and PARSE_COLNAMES to turn Module-level register_converter() function allow you to easily do that.ĭetect_types defaults to 0 (i. Theĭetect_types parameter and the using custom converters registered with the You want to use other types you must add support for them yourself. SQLite natively supports only the types TEXT, INTEGER, REAL, BLOB and NULL. Isolation_level property of Connection objects. The default for the timeoutįor the isolation_level parameter, please see the The timeout parameter specifies how long the connection should waitįor the lock to go away until raising an exception. Modifies the database, the SQLite database is locked until that transaction isĬommitted.
When a database is accessed by multiple connections, and one of the processes You can use ":memory:" to open a database connection to a database that Relative to the current working directory) of the database file to be opened. By default returns aĬonnection object, unless a custom factory is given.ĭatabase is a path-like object giving the pathname (absolute or Opens a connection to the SQLite database file database. The preceding space: the column name would simply be “Expiration date”. 'as "Expiration date "' in your SQL, then we will parse outĮverything until the first '[' for the column name and strip The column name found in scriptionĭoes not include the type, i. ‘mytype’ in the converters dictionary and then use the converter function found It will look for a string formed in there, and then decide Setting this makes the SQLite interface parse the column name for each column it Into the converters dictionary and use the converter function registered for for “integer primary key”, it will parse out “integer”, or for It will parse out the first word of the declared type, Setting it makes the sqlite3 module parse the declared type for eachĬolumn it returns. This constant is meant to be used with the detect_types parameter of the Note that the SQLITE_THREADSAFE levels do not match the DB-API 2.0 execute ( """ select * from pragma_compile_options where compile_options like 'THREADSAFE=%' """ ). You can check the underlying SQLite library’s compile-time “Threads may share the module, but not connections.” However, this may notĪlways be true. Integer constant required by the DB-API, stating the level of thread safety The version number of the run-time SQLite library, as a tuple of integers. The version number of the run-time SQLite library, as a string.
The version number of this module, as a tuple of integers. The version number of this module, as a string. However, the DB-API does not allow multiple values for Parameter styles, because that is what the underlying SQLite library The sqlite3 module supports both qmark and numeric DB-API
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