Configuration

If true, foreign key constraints are checked.

Default: true

If true, database modifications are disallowed.

Default: false

A function that is called on every statement executed by the database.

Default: nil

The passphrase for encrypted database.

Default: nil

The default kind of transaction.

Default: deferred

If false, it is a programmer error to leave a transaction opened at the end of a database access block.

For example:

let dbQueue = DatabaseQueue()

// fatal error: A transaction has been left opened at the end of a database access
try dbQueue.inDatabase { db in
    try db.beginTransaction()
}

If true, one can leave opened transaction at the end of database access blocks:

var config = Configuration()
config.allowsUnsafeTransactions = true
let dbQueue = DatabaseQueue(configuration: config)

try dbQueue.inDatabase { db in
    try db.beginTransaction()
}

try dbQueue.inDatabase { db in
    try db.commit()
}

This configuration flag has no effect on DatabasePool readers: those never allow leaving a transaction opened at the end of a read access.

Default: false

The behavior in case of SQLITE_BUSY error. See https://www.sqlite.org/rescode.html#busy

Default: immediateError

The maximum number of concurrent readers (applies to database pools only).

Default: 5

Creates a factory configuration