SQLite Transactions Part 1

Tue, 09 Jul 2019 06:43:41 +0000

In the world of software these days it is expected that applications do multiple things at once. With that said it’s pretty typical that multiple processes or threads have read and write access to a database. In this post we will go over transactions in SQLite which prohibits changes made to the database unless they are inside a transaction.

Defining a Database Transaction

Let’s first define a database transaction which is essentially to carry out or conduct to a conclusion. In the context of a database a transaction is a grouping of SQL commands. We can consider this transaction to be atomic in the sense that all the commands will execute successfully or it will fail.

Simple SQLite C API Example

Sat, 02 Feb 2019 16:45:00 +0000

When getting started on the SQLite C API they recommend 2 basic ways: sqlite3_exec() and sqlite3_get_table() both are convenience wrappers around the core API Calls. They give good examples for the sqlite3_exec() call, and the sqlite3_get_table() is deprecated in the documentation. Using sqlite3_exec() employs a callback function which gives the advantage of speed and low memory usage - due to being able to process each row at a time. It however, does not allow for knowing when all the rows are returned, as well as, being synchronous.

Database on Lloyd Rochester's Geek Blog

SQLite Transactions Part 1

Defining a Database Transaction

Simple SQLite C API Example