code: func Int8(db XODB, v0 int16, v1 int, v2 pgtypes.Oid, v3 float32, v4 float64, v5 uint8, v6 float64) (int64, error) {
  	var err error
  
  	// sql query
  	const sqlstr = `SELECT pg_catalog.int8($1, $2, $3, $4, $5, $6, $7)`
  
  	// run query
  	var ret int64
  	XOLog(sqlstr, v0, v1, v2, v3, v4, v5, v6)
  	err = db.QueryRow(sqlstr, v0, v1, v2, v3, v4, v5, v6).Scan(&ret)
  	if err != nil {
  		return 0, err
  	}
  
  	return ret, nil
  }
docs: // Int8 calls the stored procedure 'pg_catalog.int8(smallint, integer, oid, real, double precision, bit, numeric) bigint' on db.