Question

我们有一个SQLJ文件，我们指定了一个迭代器来从表中获取多个记录。目前，我们尝试通过一次从总共300条记录中提取50条记录，将300条记录从中间表上传到实际表中。

我们面临的问题是，每次获取都会创建50个迭代器，其中1个游标是DICTIONARY LOOKUP CURSOR CACHED，49个是OPEN-RECURSIVE。在我们循环遍历迭代器后，我们在finally块中进行了一次close调用，但是这会关闭一个游标，我们剩下48个OPEN-RECURSIVE游标和1个DICTIONARY LOOKUP CURSOR CACHED。我想知道是否有任何具体方法可以关闭所有这些。我试图在网上查看，但在这种情况下我们并没有真正想到这个问题。

    #sql public static iterator UploadDetailsList(BigDecimal ID, String FUNCTION_ID,String TABLE_NAME)
#sql public static iterator UploadDetailsListAnother(BigDecimal ID, String FUNCTION_ID,String TABLE_NAME)
public List<UploadDto> getRecords(UploadDto newDto,int fromRowNo){
    //fromRowNo is sent as 0
    int maxResults=50;
    int toRowNum= fromRowNo + maxResults;
    UploadDetailsList uploadDetailsList=null;
    UploadDetailsListAnother uploadDetailsListAnother=null;
    try{
        #sql  uploadDetailsList = {SELECT ID,FUNCTION_ID,TABLE_NAME FROM UPLOAD_TABLE WHERE  STATUS= 'U' AND ROWNUM BETWEEN :fromRowNo AND :toRowNum};
        while(uploadDetailsList.next()){
            //populate details to Dto object
           try{
                #sql  uploadDetailsListAnother = {SELECT ID,FUNCTION_ID,TABLE_NAME FROM UPLOAD_TABLE WHERE  STATUS= 'U' AND ROWNUM BETWEEN :fromRowNo AND :toRowNum};
                while(uploadDetailsListAnother.next()){
                    //populate details to Dto object
                }
           }
            catch(Exception e){
                //print error
            }
        }
    }
    catch(Exception e){
        //print error
    }
    finally{
        try{
            dbg("Inside finally in List<UploadDto> getRecords(UploadDto newDto,int fromRowNo)");
            if(uploadDetailsList != null){
                dbg("Closing uploadDetailsList");
                uploadDetailsList.close();
            }
             if(uploadDetailsListAnother != null){
                dbg("Closing uploadDetailsListAnother");
                uploadDetailsListAnother.close();
            }
        }
        catch(Exception e){
            //print error
        }
    }
}

有人可以让我知道我哪里出错了，还是有什么我可能会失踪的？

Answer 1

发现了我犯的最愚蠢的错误。第一个while循环中的第二个迭代器应该已经关闭然后在try迭代器的try catch之后有一个finally块。这对我有用。将问题留在这里以防其他人犯同样的错误。这是代码

#sql public static iterator UploadDetailsList(BigDecimal ID, String FUNCTION_ID,String TABLE_NAME)
#sql public static iterator UploadDetailsListAnother(BigDecimal ID, String FUNCTION_ID,String TABLE_NAME)
public List<UploadDto> getRecords(UploadDto newDto,int fromRowNo){
    //fromRowNo is sent as 0
    int maxResults=50;
    int toRowNum= fromRowNo + maxResults;
    UploadDetailsList uploadDetailsList=null;
    UploadDetailsListAnother uploadDetailsListAnother=null;
    try{
        #sql  uploadDetailsList = {SELECT ID,FUNCTION_ID,TABLE_NAME FROM UPLOAD_TABLE WHERE  STATUS= 'U' AND ROWNUM BETWEEN :fromRowNo AND :toRowNum};
        while(uploadDetailsList.next()){
            //populate details to Dto object
           try{
                #sql  uploadDetailsListAnother = {SELECT ID,FUNCTION_ID,TABLE_NAME FROM UPLOAD_TABLE WHERE  STATUS= 'U' AND ROWNUM BETWEEN :fromRowNo AND :toRowNum};
                while(uploadDetailsListAnother.next()){
                    //populate details to Dto object
                }
           }
            catch(Exception e){
                //print error
            }
            //moved the finally here with closing of the inner iterator
            finally{
                try{
                    if(uploadDetailsListAnother != null){
                        dbg("Closing uploadDetailsListAnother");
                        uploadDetailsListAnother.close();
                    }
                }
                catch(Exception e){
                    //print error
                }
            }
        }
    }
    catch(Exception e){
        //print error
    }
    finally{
        try{
            dbg("Inside finally in List<UploadDto> getRecords(UploadDto newDto,int fromRowNo)");
            if(uploadDetailsList != null){
                dbg("Closing uploadDetailsList");
                uploadDetailsList.close();
            }

        }
        catch(Exception e){
            //print error
        }
    }
}

通过SQLJ文件关闭OPEN-RECURSIVE和DICTIONARY LOOKUP CURSOR CACHED游标

1 个答案: