public Rndm_bldr_wkr( Db_conn conn, Rndm_qry_tbl qry_tbl, Rndm_rng_tbl rng_tbl, Rndm_seq_tbl seq_tbl) { this.conn = conn; this.qry_tbl = qry_tbl; this.rng_tbl = rng_tbl; this.seq_tbl = seq_tbl; qry_idx_max = qry_tbl.Select_qry_max(); }