CallbackWriter is an LDBWriter that delegates to another writer and then, upon a successful write, executes N callbacks.

LDBWriteMetadata contains the metadata about a statement that was written to the LDB.

PragmaWALResult https://www.sqlite.org/pragma.html#pragma_wal_checkpoint.

ldbWriter applies statements to a SQL database.

Statement to update the sequence tracker, ensuring that it doesn't go backwards without a round-trip to the DB and/or any race conditions.

CheckpointType see https://www.sqlite.org/pragma.html#pragma_wal_checkpoint.