Question

我试图将输入关系INPUTRel中的元组插入到具有外键的源关系UK_RD_Spend中，然后更新目标关系UK_Status的元组。 UK_Status和UK_RD_Spend具有主键 - 外键关系。

以下是参数： INPUTRel：TransId，Company，ICB_Code，RD2008 UK_RD_Spend：Company，ICB_Code，RD_spend_2008 UK_Status：公司：RD08

所以我从INPUTRel插入一个元组到UK_RD_Spend。它成功了。但是当我尝试更新UK_Status的元组时，它返回了SQLException。

我正在尝试更新RD08，但我还需要检查是否违反了外键约束（如果公司名称在UK_RD_Spend中不存在）。但是，我收到了这个错误：

SQLException: UCAExc:::4.0.3 user lacks privilege or object not found:

我不确定如何修复它。我的代码部分如下：

String queryFK = "SELECT * FROM UK_Status WHERE Company = "
                    + company + "";
            pstmt = conn.prepareStatement(queryFK);
            pstmt.setString(1, company);
            pstmt.setDouble(2, RD2008);
            String msg1;
            try {
                pstmt.executeUpdate();

            } catch (SQLException se) {
                // Check FK Violation: company must exist
                if (t2.get(company).getCompany() == null) {
                // or this ?->
                // if
                // (!(conn.createStatement()).executeQuery(queryFK).next())
                // {
                    String ICB_CodeTest = Integer.toString(ICB_Code);
                    String RD2008Test = Double.toString(RD2008);
                    ICB_CodeTest = ICB_CodeTest.replaceAll("\\s+", "");
                    RD2008Test = RD2008Test.replaceAll("\\s+", "");
                    msg1 = "Transaction "
                            + tid
                            + " failed due to a FK constraint, for the following values of the input; ("
                            + company + ", " + ICB_Code + ", " + RD2008
                            + ")";
                    String fk2 = "INSERT INTO OUTPUTRel"
                            + "(TransId, RunMessages) " + "values (?, ?)";
                    pstmt = conn.prepareStatement(fk2);
                    pstmt.setInt(1, tid);
                    pstmt.setString(2, msg1);
                    pstmt.execute();
                    pstmt.close();
                    continue;
                }
            }
            //
            String companyName = t2.get(company).getCompany();
            Status s = t2.get(companyName);
            s.setRD2008(RD2008);

            String query = "UPDATE UK_Status SET RD08 = ? WHERE Company = ?";
            pstmt = conn.prepareStatement(query);
            pstmt.setDouble(1, s.getRD2008());
            pstmt.setString(2, company);

            int number = (int) s.getRD2008();

            if (number < ICB_Code) {
                msg = "Transaction "
                        + tid
                        + " succeeded for the following values of the input; ("
                        + company + ", " + ICB_Code + ", " + RD2008 + ")";
                pstmt.execute();
                // Finally insert execution result on the output table.
                String oo = "INSERT INTO OUTPUTRel"
                        + "(TransId, RunMessages) " + "values (?, ?)";
                pstmt = conn.prepareStatement(oo);
                pstmt.setInt(1, tid);
                pstmt.setString(2, msg);
                pstmt.execute();
                pstmt.close();
            } else {
                msg = "Transaction "
                        + tid
                        + " failed due to a dynamic constraint, for the following values of the input; ("
                        + company + ", " + ICB_Code + ", " + RD2008 + ")";
                // Finally insert execution result on the output table.
                String dynamicFail = "INSERT INTO OUTPUTRel"
                        + "(TransId, RunMessages) " + "values (?, ?)";
                pstmt = conn.prepareStatement(dynamicFail);
                pstmt.setInt(1, tid);
                pstmt.setString(2, msg);
                pstmt.execute();
                pstmt.close();
            }
        }

Answer 1

String queryFK = "SELECT * FROM UK_Status WHERE Company = "
                + company + "";
        pstmt = conn.prepareStatement(queryFK);
        pstmt.setString(1, company);
        pstmt.setDouble(2, RD2008);
        String msg1;
        try {
            pstmt.executeUpdate();

        } catch (SQLException se) {

您的陈述不能用作PreparedStatement，因为您输入的值代替?。错误来自BTW，因为您没有引用该值，因此数据库会查找具有公司名称的列，而不是查找值为{{1}的行在“公司＆＃39;”栏目中。

此外，您使用company执行该语句，该语句不能与select语句一起使用，也不会返回您可以迭代的结果集。

JDBC / Access：用户缺少未找到的权限或对象

1 个答案: