Function rorm::rorm_db_raw_sql

#[no_mangle]
pub extern "C" fn rorm_db_raw_sql(
    db: &'static Database,
    transaction: Option<&'static mut Transaction>,
    query_string: FFIString<'static>,
    bind_params: FFISlice<'static, FFIValue<'static>>,
    callback: Option<unsafe extern "C" fn(_: usize, _: FFISlice<'_, Row>, _: Error<'_>)>,
    context: usize
)

This function executes a raw SQL statement.

Statements are executed as prepared statements, if possible.

To define placeholders, use ? in SQLite and MySQL and $1, $n in Postgres. The corresponding parameters are bound in order to the query.

The number of placeholder must match with the number of provided bind parameters.

To include the statement in a transaction specify transaction as a valid Transaction. As the Transaction needs to be mutable, it is important to not use the Transaction anywhere else until the callback is finished.

If the statement should be executed not in a Transaction, specify a null pointer.

Parameter:

• db: Reference to the Database, provided by rorm_db_connect.
• transaction: Mutable pointer to a Transaction. Can be a null pointer to ignore this parameter.
• query_string: SQL statement to execute.
• bind_params: Slice of FFIValues to bind to the query.
• callback: callback function. Takes the context, a pointer to a slice of rows and an Error.
• context: Pass through void pointer.

Important:

• Make sure db, query_string and bind_params are allocated until the callback was executed.
• The FFISlice returned in the callback is freed after the callback has ended.

This function is called from an asynchronous context.