if (isParamSet == null) return;
    public void clearParameters() throws  SQLException {        for (int i = 0; i < isParamSet.length; i++)            isParamSet[i] = false;                XSQLVAR[] xsqlvar = fixedStmt.getInSqlda().sqlvar;        for (int i = 0; i < xsqlvar.length; i++) {            xsqlvar[i].sqldata = null;        }    }