code: func PgAuthMemberByMemberRoleid(db XODB, member pgtypes.Oid, roleid pgtypes.Oid) (*PgAuthMember, error) {
  	var err error
  
  	// sql query
  	const sqlstr = `SELECT ` +
  		`tableoid, cmax, xmax, cmin, xmin, ctid, roleid, member, grantor, admin_option ` +
  		`FROM pg_catalog.pg_auth_members ` +
  		`WHERE member = $1 AND roleid = $2`
  
  	// run query
  	XOLog(sqlstr, member, roleid)
  	pam := PgAuthMember{}
  
  	err = db.QueryRow(sqlstr, member, roleid).Scan(&pam.Tableoid, &pam.Cmax, &pam.Xmax, &pam.Cmin, &pam.Xmin, &pam.Ctid, &pam.Roleid, &pam.Member, &pam.Grantor, &pam.AdminOption)
  	if err != nil {
  		return nil, err
  	}
  
  	return &pam, nil
  }
docs: // PgAuthMemberByMemberRoleid retrieves a row from 'pg_catalog.pg_auth_members' as a PgAuthMember.
  //
  // Generated from index 'pg_auth_members_member_role_index'.