| Overview |  |
Authors: Maas-Maarten Zeeman (mmzeeman@xs4all.nl).
ESQLite is a library which makes it possible to use sqlite databases in erlang. It is implemented as a NIF, which means that the sqlite database engine is linked to the erlang virtual machine.
Sqlite is a implementation of SQL as a library. This means that you don't run a separate SQL server that your program communicates with, but you embed the SQL implementation directly in your program. Sqlite stores its data in a single file. The file format is portable between different machine architectures. It supports atomic transactions and it is possible to access the file by multiple processes and different programs.
The main api is the esqlite3 module. It contains more high level api methods to use the database.
%% Open a database
{ok, Conn} = esqlite3:open("my-database.db").
This opens a connection to a database. When the file does not exist yet, it is created. It is possible to share the connection between different processes.
Sqlite supports a URI database naming scheme which makes it possible to open a database in read-only mode, or use shared memory databases. More information on this can be found at: https://sqlite.org/uri.html#uri_filenames_in_sqlite
For example:
%% Open a shared memory database with transactional capabilities
{ok, Conn} = esqlite3:open("file:memdb1?mode=memory&cache=shared").
This opens a shared memory database. Other processes can open the same database name and access and store data consistently.
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