[bitter]

Query                   query          = new Query();
QueryRun                queryRun;
QueryBuildDataSource    qbds;
;

qbds = query.addDataSource(tableNum(RContractTable));
qbds.addRange(fieldNum(RContractTable, RContractAccount)).value(PayRequestTable.RContractAccount);
queryRun = new QueryRun(query);
if (queryRun.next())
{
    info("true");
}
else if (!queryRun.next())
{
    info("false");
}