来自 Toplink 表达式的 SQL 查询

Question

我有一个 oracle.toplink.expressions.Expression 表达式对象，它是使用 oracle.toplink.expressions.ExpressionBuilder 创建的。我想找到它的等效 SQL 查询（比如从员工 emp 中选择 emp.empname，emp.empId），它最终将被触发以获取数据。我想找到它的等价 Statement/PreparedStatement 或任何能帮助我获得即将被触发的原始​​ SQL 语句的东西。

例如 以下是 toplink 表达式：

expressionBuilder.get("empName").equal("Eric");

我想得到等效的 SQL 查询：

select emp.empName,emp.emp_id,emp.sal from employee emp where emp.empName like 'Eric'

如果有任何 API 可以获取 sol，请告诉我。我尝试了 DatabaseQuery 的实现类，但找不到任何可以完成此操作的方法。

下面是我的toplink表达式：

Logical operator  AND 
   Logical operator  AND 
      Logical operator  AND 
         Logical operator  AND 
            Logical operator  AND 
               Logical operator  AND 
                  Logical operator  AND 
                     Logical operator  AND 
                        Relation operator  < 
                           Query Key minEffectiveBegDate
                              Base com.altra.common.data.OperationalTrxData
                           Constant Tue Feb 01 08:00:00 CST 2011
                        Relation operator  > 
                           Query Key maxEffectiveEndDate
                              Base com.altra.common.data.OperationalTrxData
                           Constant Sat Jan 01 08:00:00 CST 2011
                     Relation operator  < 
                        Query Key begDate
                           Query Key calculatedQuantityDataList
                              Query Key qtyClassificationDataList
                                 Query Key operationalQuantityDataList
                                    Base com.altra.common.data.OperationalTrxData
                        Constant Tue Feb 01 08:00:00 CST 2011
                  Relation operator  > 
                     Query Key endDate
                        Query Key calculatedQuantityDataList
                           Query Key qtyClassificationDataList
                              Query Key operationalQuantityDataList
                                 Base com.altra.common.data.OperationalTrxData
                     Constant Sat Jan 01 08:00:00 CST 2011
               Relation operator  = 
                  Query Key opsTrxClassification
                     Base com.altra.common.data.OperationalTrxData
                  Constant -5001579
            Relation operator  = 
               Query Key accountingCompany
                  Base com.altra.common.data.OperationalTrxData
               Constant 1196
         Logical operator  OR 
            Logical operator  AND 
               Relation operator  = 
                  Query Key sourceRelatedNodeObjType
                     Base com.altra.common.data.OperationalTrxData
                  Constant -2094
               Relation operator  IN 
                  Query Key sourceRelatedNodeObjId
                     Base com.altra.common.data.OperationalTrxData
                  Constant [4187]
            Logical operator  AND 
               Relation operator  = 
                  Query Key dispositionRelatedNodeObjType
                     Base com.altra.common.data.OperationalTrxData
                  Constant -2094
               Relation operator  IN 
                  Query Key dispositionRelatedNodeObjId
                     Base com.altra.common.data.OperationalTrxData
                  Constant [4187]
      Relation operator  = 
         Query Key qtyType
            Query Key operationalQuantityDataList
               Base com.altra.common.data.OperationalTrxData
         Constant -5000328
   Relation operator  = 
      Query Key qtyStatus
         Query Key qtyClassificationDataList
            Query Key operationalQuantityDataList
               Base com.altra.common.data.OperationalTrxData
      Constant -5000316

我想要类似

的 SQL 等价物

select otd.operationaltrx_id,otd.accountingCompany from OperationalTrxData otd where minEffectiveBegDate > to_date('','') ...

谢谢， 阿迪提亚。

Answer 1

使用 ReportQuery 选择所需的字段，然后“准备”查询并打印出将生成的 SQL：

ExpressionBuilder emp = new ExpressionBuilder(Employee.class);
ReportQuery query = new ReportQuery(Employee.class, emp);
query.addAttribute("empName");
query.addAttribute("emp_id");
query.addAttribute("sal");

query.setSelectionCriteria(emp.get("empName").equal("Eric"););
query.prepareCall(session, new DatbaseRecord());
String sql = query.getSQLString();

Answer 2

您需要使用 ReportQuery。

ExpressionBuilder emp = new ExpressionBuilder();
ReportQuery query = new ReportQuery(Employee.class, emp);
query.addAttribute("empName");
query.addAttribute("emp_id");
query.addAttribute("sal");

query.setSelectionCriteria(emp.get("empName").equal("Eric"););
List reports = (List) session.executeQuery(query);