SQLite natively supports only the types TEXT, INTEGER, REAL, BLOB and NULL. The default for the timeout parameter is 5.0 (five seconds).įor the isolation_level parameter, please see the isolation_level property of Connection objects. The timeout parameter specifies how long the connection should wait for the lock to go away until raising an exception. When a database is accessed by multiple connections, and one of the processes modifies the database, the SQLite database is locked until that transaction is committed. You can use ":memory:" to open a database connection to a database that resides in RAM instead of on disk. By default returns a Connection object, unless a custom factory is given.ĭatabase is a path-like object giving the pathname (absolute or relative to the current working directory) of the database file to be opened. Opens a connection to the SQLite database file database. if you use something like 'as "Expiration date "' in your SQL, then we will parse out everything until the first ' ) The column name found in scription does not include the type, i. It will try to find an entry of ‘mytype’ in the converters dictionary and then use the converter function found there to return the value. It will look for a string formed in there, and then decide that ‘mytype’ is the type of the column. Setting this makes the SQLite interface parse the column name for each column it returns. Then for that column, it will look into the converters dictionary and use the converter function registered for that type there. for “integer primary key”, it will parse out “integer”, or for “number(10)” it will parse out “number”. It will parse out the first word of the declared type, i. Setting it makes the sqlite3 module parse the declared type for each column it returns. This constant is meant to be used with the detect_types parameter of the connect() function. Note that the SQLITE_THREADSAFE levels do not match the DB-API 2.0 threadsafety levels. Where compile_options like 'THREADSAFE=%' You can check the underlying SQLite library’s compile-time threaded mode using the following query: Currently hard-coded to 1, meaning “Threads may share the module, but not connections.” However, this may not always be true. Integer constant required by the DB-API, stating the level of thread safety the sqlite3 module supports. sqlite_version_info The version number of the run-time SQLite library, as a tuple of integers. sqlite_version The version number of the run-time SQLite library, as a string. This is not the version of the SQLite library. version_info The version number of this module, as a tuple of integers. version The version number of this module, as a string. However, the DB-API does not allow multiple values for the paramstyle attribute. The sqlite3 module supports both qmark and numeric DB-API parameter styles, because that is what the underlying SQLite library supports. Here the data will be stored in the example.db file: To use the module, start by creating a Connection object that represents the database. It provides a SQL interface compliant with the DB-API 2.0 specification described by PEP 249, and requires SQLite 3.7.15 or newer. The sqlite3 module was written by Gerhard Häring. It’s also possible to prototype an application using SQLite and then port the code to a larger database such as PostgreSQL or Oracle. Some applications can use SQLite for internal data storage. SQLite is a C library that provides a lightweight disk-based database that doesn’t require a separate server process and allows accessing the database using a nonstandard variant of the SQL query language. Sqlite3 - DB-API 2.0 interface for SQLite databases
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |