Autocommit mode has slightly different behavior depending on the interface and provider that you are using and how you control the autocommit behavior.
Autocommit mode can be implemented in one of two ways:
ADO.NET, ADO/OLE DB, ODBC, PHP, and SQL Anywhere JDBC driver applications control commit behavior from the client side.
Embedded SQL, the jConnect driver, and Open Client applications manipulate server-side commit behavior (for example, they set the chained option).
For compound statements such as stored procedures or triggers there is a difference between client-side and server-side autocommit. From the client side, a stored procedure is a single statement, and so autocommit sends a single commit statement after the whole procedure is executed. From the database server perspective, the stored procedure may be composed of many SQL statements, and so server-side autocommit commits the results of each SQL statement within the procedure.