presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/metadata/MetadataDao.java/MetadataDao/unblockMaintenance
class MetadataDao:    @SqlUpdate("UPDATE tables SET maintenance_blocked = NULL\n" +
            "WHERE table_id = :tableId")
    void unblockMaintenance(@Bind("tableId") long tableId);