Constant xapian::constants::DB_BACKEND_HONEY

pub const DB_BACKEND_HONEY: i32 = 0x500;

Use the honey backend.

When opening a WritableDatabase, this means create a honey database if a new database is created. If there’s an existing database (of any type) at the specified path, this flag has no effect.

When opening a Database, this flag means to only open it if it’s a honey database. There’s rarely a good reason to do this - it’s mostly provided as equivalent functionality to that provided by the namespaced open() functions in Xapian 1.2.