CREATE TABLE IF NOT EXISTS keyrings_public (
    master_key_id INTEGER NOT NULL PRIMARY KEY,
    key_ring_data BLOB NULL
);

insertKeyRingPublic:
INSERT INTO keyrings_public (master_key_id, key_ring_data) VALUES (?, ?);

selectAllMasterKeyIds:
SELECT master_key_id
    FROM keyrings_public;

selectByMasterKeyId:
SELECT *
    FROM keyrings_public
    WHERE master_key_id = ?;

deleteByMasterKeyId:
DELETE FROM keyrings_public
    WHERE master_key_id = ?;