Regarding the Ref Cursor functional;ity

HI,
I am using ref cursor to return Result Set to .Net.
I am in doubt that , Is it requires multiple server trips to fill the DataSet at front end.
As my assumption it will return the address of the work area provided in Oracle server. After that for each row it make a server trip .
Is my assumption is right ?
Can any one tell me the functionality behind returning a Ref Cursor .
Thank you....

This is (or ought to be) configurable on the .NET side. There will be a server round-trip to fetch every N records where N is a setting on the client. I'm not particularly experienced with .NET, so I'm not sure where this setting is set, but the folks over in the .NET forum might.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

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    15                             'Joining Date: '||rec_x.hiredate||' - '||                          
    16                             'Salary: '||rec_x.sal||' - '||                          
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    SQL>

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                FROM EMR_ADTAOE_DTL
                WHERE PATIENT_ID  = IN_PATIENT_ID
                AND   TEST_ID = AOE_REC.TEST_ID
                AND   FACILITY_ID = IN_FACILITY_ID   
                AND   (DRAW_DATE   = IN_DRAW_DT
                    OR DRAW_DATE   = TO_DATE('2999/12/31','YYYY/MM/DD'))
                AND   SOURCE_SYSTEM = IN_CORP_ACRONYM ;
                --Collecting all questions in interface_adt_aoe_master
                SELECT STRAGG(SUB1.QUESTION_CODE), COUNT(SUB1.QUESTION_CODE)
                INTO VC_ACTUAL_QUES, VC_ACTUAL_QUES_CNT
                FROM (SELECT DISTINCT QUESTION_CODE FROM INTERFACE_ADT_AOE_MASTER
                      WHERE TEST_CODE = (SELECT TEST_CODE FROM TEST WHERE TEST_ID = AOE_REC.TEST_ID)
                      AND   SOURCE_SYSTEM = IN_CORP_ACRONYM
                      ORDER BY QUESTION_CODE) SUB1;
                 SPL_SPN_ERROR_LOGGING_SPK.INFO_PROC
                              (IC_PACKAGE_NAME    => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                              ,IC_PROCEDURE_NAME  => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                              ,IN_BATCH_ID        => '100'
                              ,IC_MESSAGE_TEXT    => 'vc_actual_ques:'||VC_ACTUAL_QUES ||
                                                     ' vn_exact_pat_id_cnt:'||VN_EXACT_PAT_ID_CNT||
                                                     ' aoe_rec.test_id:'||AOE_REC.TEST_ID||
                                                     ' VN_ITERATION_RUN:'||VN_ITERATION_RUN);
                <<MAIN_IF_BLOCK>>
                IF
                    VN_EXACT_PAT_ID_CNT = 1 AND
                    VN_ITERATION_RUN    >= 1 THEN               
                    --Collecting avaliable questions in emr_adtaoe_dtl               
                    SELECT STRAGG(SUB.QUESTION_CODE), COUNT(DISTINCT SUB.QUESTION_CODE)
                    INTO VC_AVL_PAT_QUES, VN_AVL_PAT_QUES_CNT
                    FROM (SELECT DISTINCT QUESTION_CODE FROM EMR_ADTAOE_DTL
                          WHERE TEST_ID = AOE_REC.TEST_ID
                          AND   PATIENT_ID  = IN_PATIENT_ID
                          AND   FACILITY_ID = IN_FACILITY_ID
                          AND   (DRAW_DATE   = IN_DRAW_DT
                              OR DRAW_DATE   = TO_DATE('2999/12/31','YYYY/MM/DD'))
                          AND   SOURCE_SYSTEM = IN_CORP_ACRONYM
                          AND   ANSWER IS NOT NULL
                          ORDER BY QUESTION_CODE) SUB;
                    SPL_SPN_ERROR_LOGGING_SPK.INFO_PROC
                      (IC_PACKAGE_NAME    => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                      ,IC_PROCEDURE_NAME  => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                      ,IN_BATCH_ID        => '100'
                      ,IC_MESSAGE_TEXT    => 'vc_avl_pat_ques:'||VC_AVL_PAT_QUES||
                                             ' vn_avl_pat_ques_cnt:'||VN_AVL_PAT_QUES_CNT);
                    <<CASE_1_AND_2>>
                    IF
                        VC_AVL_PAT_QUES = VC_ACTUAL_QUES THEN
                        VC_EXACT_BOOLEAN_VAL := 'TRUE';
                        VC_COMMENTS := 'AOE AVAILABLE';
                    ELSIF--<<case_1_and_2>>
                        (VC_AVL_PAT_QUES != VC_ACTUAL_QUES OR VC_AVL_PAT_QUES IS NULL) AND
                        VN_AVL_PAT_QUES_CNT >= 0 THEN
                        VC_EXACT_PAR_BOOLEAN_VAL := 'TRUE';
                        VC_PAR_COMMENTS := 'PARTIAL AOE AVAILABLE';
                    END IF;--<<case_1_and_2>>
                ELSIF
                    VN_EXACT_PAT_ID_CNT = 0 AND
                    VN_ITERATION_RUN    > 1 THEN 
                    VC_EXACT_PAR_BOOLEAN_VAL := 'TRUE';
                    VC_PAR_COMMENTS := 'PARTIAL AOE AVAILABLE';
                ELSIF--<<Main_if_block>>
                    VN_EXACT_PAT_ID_CNT = 0 THEN
                    <<DUPL_PAT_LOOP>>
                    FOR PAT_ID_REC IN(SELECT DISTINCT PATIENT_ID
                                      FROM PATIENT P
                                      WHERE P.ABCDEF_MRN = IN_ABCDEF_MRN
                                      AND EXISTS(SELECT 1 FROM EMR_ADTAOE_DTL EAD
                                                 WHERE EAD.PATIENT_ID  = P.PATIENT_ID
                                                 AND   EAD.TEST_ID     = AOE_REC.TEST_ID
                                                 AND   EAD.FACILITY_ID = IN_FACILITY_ID
                                                 AND  (EAD.DRAW_DATE  = IN_DRAW_DT
                                                    OR EAD.DRAW_DATE  = TO_DATE('2999/12/31','YYYY/MM/DD'))
                                                 AND   EAD.SOURCE_SYSTEM   = IN_CORP_ACRONYM)
                                      AND P.PATIENT_ID != IN_PATIENT_ID)
                    LOOP
                        --Collecting avaliable questions in emr_adtaoe_dtl
                        SELECT STRAGG(SUB.QUESTION_CODE), COUNT(QUESTION_CODE)
                        INTO VC_DUP_PAT_QUES, VN_DUP_PAT_QUES_CNT
                        FROM (SELECT QUESTION_CODE FROM EMR_ADTAOE_DTL   
                               WHERE TEST_ID     = AOE_REC.TEST_ID
                               AND   PATIENT_ID  = PAT_ID_REC.PATIENT_ID
                               AND   FACILITY_ID = IN_FACILITY_ID
                               AND   (DRAW_DATE   = IN_DRAW_DT
                                   OR DRAW_DATE   = TO_DATE('2999/12/31','YYYY/MM/DD'))
                               AND   SOURCE_SYSTEM = IN_CORP_ACRONYM
                               AND   ANSWER IS NOT NULL
                               ORDER BY QUESTION_CODE) SUB;
                        <<CASE_3_AND_4>>
                        IF 
                            VC_DUP_PAT_QUES = VC_ACTUAL_QUES THEN
                            VC_DUPL_BOOLEAN_VAL  := 'TRUE';
                            VC_COMMENTS := 'AOE AVAILABLE FOR DUPLICATE PATIENT';
                        ELSIF
                            VC_DUP_PAT_QUES != VC_ACTUAL_QUES AND
                            VN_DUP_PAT_QUES_CNT >= 0 THEN
                            VC_DUPL_PAR_BOOLEAN_VAL := 'TRUE';
                            VC_PAR_COMMENTS := 'PARTIAL AOE AVAILABLE FOR DUPLICATE PATIENT';
                        END IF;--<<case_3_and_4>>
                        VN_DUPL_PAT_ID := PAT_ID_REC.PATIENT_ID;
                        SPL_SPN_ERROR_LOGGING_SPK.INFO_PROC
                                  (IC_PACKAGE_NAME    => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                                  ,IC_PROCEDURE_NAME    => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                                  ,IN_BATCH_ID        => '100'
                                  ,IC_MESSAGE_TEXT    => 'vc_dup_pat_ques:'||VC_DUP_PAT_QUES||
                                                         ' vn_dup_pat_ques_cnt:'||VN_DUP_PAT_QUES_CNT||
                                                         ' VC_COMMENTS:'||VC_COMMENTS||
                                                         ' VC_PAR_COMMENTS:'||VC_PAR_COMMENTS);
                    END LOOP DUPL_PAT_LOOP;
                    VC_CHK_FOR_EXT_ID := 'Y';
                    IF
                      VC_CHK_FOR_EXT_ID = 'Y' THEN
                      <<EXTERNAL_ID_LOOP>>
                      FOR P_PAT_EXT_ID_REC IN (SELECT DISTINCT P.EXTERNAL_ID
                                                 FROM PATIENT P
                                                WHERE P.ABCDEF_MRN = IN_ABCDEF_MRN
                                                  AND P.EXTERNAL_ID IS NOT NULL)
                      LOOP 
                          INSERT INTO TT_A04_OBX_QUES_ANS_DTL
                          (SELECT IAOBX.MSG_ID, IAOBX.OBSERVATION_IDENTIFIER, IAOBX.OBSERVATION_VALUE, IAM.UOM
                            FROM INTERFACE_A04_OBX_SEGMENT IAOBX, INTERFACE_ADT_AOE_MASTER IAM
                            WHERE IAOBX.OBSERVATION_IDENTIFIER = IAM.QUESTION_CODE
                            AND   (IAOBX.OBSERVATION_DTM  = TO_CHAR(IN_DRAW_DT,'YYYYMMDD')
                                OR IAOBX.OBSERVATION_DTM = TO_CHAR(TO_DATE('2999/12/31','YYYY/MM/DD'),'YYYYMMDD'))
                            AND   IAOBX.MSG_ID IN (SELECT IPID.MSG_ID
                                                     FROM   INTERFACE_A04_PID_SEGMENT IPID
                                                    WHERE   IPID.PATIENT_ID_EXTERNAL  = P_PAT_EXT_ID_REC.EXTERNAL_ID
                                                      AND   IPID.MSG_ID IN (SELECT IMSH.MSG_ID
                                                                             FROM  INTERFACE_A04_MSH_SEGMENT IMSH
                                                                             WHERE (TRIM('W' FROM SUBSTR(IMSH.SENDING_FACILITY,5,LENGTH(IMSH.SENDING_FACILITY))) = IN_ACCOUNT_NUMBER
                                                                                 OR SUBSTR(IMSH.SENDING_FACILITY,2,LENGTH(IMSH.SENDING_FACILITY))    = IN_HLAB_NUM))));
                          BEGIN
                            SELECT STRAGG(SUB3.OBSERVATION_IDENTIFIER), COUNT(OBSERVATION_IDENTIFIER)
                            INTO VC_OBX_QUES, VC_OBX_QUES_CNT
                            FROM (SELECT DISTINCT OBSERVATION_IDENTIFIER
                                  FROM TT_A04_OBX_QUES_ANS_DTL
                                  ORDER BY OBSERVATION_IDENTIFIER)SUB3;
                             IF
                                VC_OBX_QUES = VC_ACTUAL_QUES THEN
                                VC_COMMENTS := 'AOE RECEIVED IN A REJECTED ADT';
                                VC_REJECTED_BOOLEAN_VAL := 'TRUE';
                             ELSIF
                                VC_OBX_QUES != VC_ACTUAL_QUES AND
                                VC_OBX_QUES_CNT > 0 THEN
                                VC_PAR_COMMENTS := 'PARTIAL AOE RECEIVED IN A REJECTED ADT';
                                VC_REJECTED_PAR_BOOLEAN_VAL := 'TRUE';
                             END IF;
                            VN_EXTERNAL_ID := P_PAT_EXT_ID_REC.EXTERNAL_ID;
                        EXCEPTION
                          WHEN NO_DATA_FOUND THEN
                            VC_REJECTED_BOOLEAN_VAL := 'FALSE';
                            VC_REJECTED_PAR_BOOLEAN_VAL := 'FALSE';
                        END;
                         SPL_SPN_ERROR_LOGGING_SPK.INFO_PROC
                                    (IC_PACKAGE_NAME    => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                                    ,IC_PROCEDURE_NAME    => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                                    ,IN_BATCH_ID        => '100'
                                    ,IC_MESSAGE_TEXT    => 'vc_obx_ques:'||VC_OBX_QUES||
                                                           ' vc_obx_ques_cnt:'||VC_OBX_QUES_CNT);
                      END LOOP EXTERNAL_ID_LOOP;
                    END IF;
                END IF;--<<Main_if_block>>
          END LOOP AOE_TEST_LOOP;
      --Returning output as per the execution result.
      IF
         VC_EXACT_BOOLEAN_VAL = 'TRUE' AND
         VC_EXACT_PAR_BOOLEAN_VAL = 'FALSE' THEN
         OV_COMMENTS := VC_COMMENTS;
         VC_DUPL_BOOLEAN_VAL         := NULL;
         VC_DUPL_PAR_BOOLEAN_VAL     := NULL;
         VC_REJECTED_BOOLEAN_VAL     := NULL;
         VC_REJECTED_PAR_BOOLEAN_VAL := NULL;
         VC_RETURN_EXACT_PAT := 'Y';
      ELSIF
         --VC_EXACT_BOOLEAN_VAL = 'TRUE' AND
         VC_EXACT_PAR_BOOLEAN_VAL = 'TRUE' THEN
         OV_COMMENTS := VC_PAR_COMMENTS;
         VC_DUPL_BOOLEAN_VAL         := NULL;
         VC_DUPL_PAR_BOOLEAN_VAL     := NULL;
         VC_REJECTED_BOOLEAN_VAL     := NULL;
         VC_REJECTED_PAR_BOOLEAN_VAL := NULL;
         VC_RETURN_EXACT_PAT := 'Y';
      END IF;
      IF
        VC_RETURN_EXACT_PAT = 'Y' THEN
        --Returning result set (OV_COMMENTS,Question and Answer) for the exact patient.(Case 1 (AOE) and 2 (PARTIAL AOE))
        SELECT MAX (SUB.COUNT_QUES_ANS)
        INTO VN_MAX_COUNT FROM (SELECT COUNT(*) OVER (PARTITION BY EAD.QUESTION_CODE, EAD.ANSWER) AS COUNT_QUES_ANS
                                FROM  EMR_ADTAOE_DTL EAD , INTERFACE_ADT_AOE_MASTER IAM, TEST T
                                WHERE T.TEST_ID = EAD.TEST_ID
                                AND   IAM.TEST_CODE = T.TEST_CODE
                                AND   EAD.SOURCE_SYSTEM = IAM.SOURCE_SYSTEM
                                AND   EAD.QUESTION_CODE = IAM.QUESTION_CODE
                                AND   EAD.PATIENT_ID    = IN_PATIENT_ID
                                AND   EAD.FACILITY_ID   = IN_FACILITY_ID
                                AND   (TRUNC(EAD.DRAW_DATE)   = IN_DRAW_DT
                                      OR TRUNC(EAD.DRAW_DATE) = TRUNC(TO_DATE('12-31-2999','mm-dd-yyyy')))
                                AND   EAD.SOURCE_SYSTEM = IN_REQUISITION_NUMBER) SUB;
         IF
            VN_MAX_COUNT > 1 THEN
            SPL_SPN_ERROR_LOGGING_SPK.INFO_PROC
                                    (IC_PACKAGE_NAME    => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                                    ,IC_PROCEDURE_NAME  => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                                    ,IN_BATCH_ID        => '100'
                                    ,IC_MESSAGE_TEXT    => 'exact patient duplicate scenario'||' vn_max_count:'||VN_MAX_COUNT);
            OPEN VR_QUES_AND_ANS FOR                                 
            SELECT DISTINCT IAM.QUESTION_CODE,
                  (SELECT DISTINCT CASE
                                   WHEN EAD.ANSWER IS NULL THEN NULL
                                   WHEN LENGTH(TRIM(TRANSLATE(EAD.ANSWER, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', ' '))) IS NULL THEN EAD.ANSWER
                                   ELSE TO_CHAR(TRUNC(EAD.ANSWER *  DECODE(UPPER(IAM.UOM), 'KGS', 2.20462,1),2))
                                   END
                    FROM  EMR_ADTAOE_DTL EAD , TEST T
                    WHERE T.TEST_ID = EAD.TEST_ID
                    AND   IAM.TEST_CODE = T.TEST_CODE
                    AND   EAD.SOURCE_SYSTEM = IAM.SOURCE_SYSTEM
                    AND   EAD.QUESTION_CODE = IAM.QUESTION_CODE
                    AND   EAD.PATIENT_ID    = IN_PATIENT_ID
                    AND   EAD.FACILITY_ID   = IN_FACILITY_ID
                    AND   (TRUNC(EAD.DRAW_DATE)    = IN_DRAW_DT
                            OR TRUNC(EAD.DRAW_DATE) = TRUNC(TO_DATE('12-31-2999','mm-dd-yyyy')))
                    AND   EAD.SOURCE_SYSTEM = IN_CORP_ACRONYM
                    AND   EAD.ANSWER IS NOT NULL
                    AND   EAD.STATUS = DECODE(IAM.MATCH_TYPE, 'AT', EAD.STATUS, 'N')
                    ) AS ANSWER
            FROM INTERFACE_ADT_AOE_MASTER IAM
            WHERE IAM.SOURCE_SYSTEM = IN_CORP_ACRONYM
            AND IAM.TEST_CODE IN  (SELECT ORD.TEST_CODE
                                     FROM ORDER_REQUISITION_DETAIL ORD
                                    WHERE ORD.REQUISITION_HDR_ID = (SELECT ORH.REQUISITION_HDR_ID
                                                                      FROM ORDER_REQUISITION_HEADER ORH
                                                                     WHERE ORH.REQUISITION_NUMBER = IN_REQUISITION_NUMBER)   
                                    AND EXISTS (SELECT 1 FROM EMR_ADTAOE_DTL EAD1, INTERFACE_ADT_AOE_MASTER IAM1, TEST T1
                                                 WHERE  ORD.TEST_ID = EAD1.TEST_ID
                                                  AND   IAM1.TEST_CODE = T1.TEST_CODE
                                                  AND   EAD1.SOURCE_SYSTEM = IAM1.SOURCE_SYSTEM
                                                  AND   EAD1.QUESTION_CODE = IAM1.QUESTION_CODE
                                                  AND   EAD1.PATIENT_ID    = IN_PATIENT_ID
                                                  AND   EAD1.FACILITY_ID   = IN_FACILITY_ID
                                                  AND   (TRUNC(EAD1.DRAW_DATE)    = IN_DRAW_DT
                                                        OR TRUNC(EAD1.DRAW_DATE) = TRUNC(TO_DATE('12-31-2999','mm-dd-yyyy')))
                                                  AND   EAD1.SOURCE_SYSTEM = IN_CORP_ACRONYM
                                                  AND   EAD1.ANSWER IS NOT NULL
                                                  AND   EAD1.STATUS = DECODE(IAM1.MATCH_TYPE, 'AT', EAD1.STATUS, 'N')));
         ELSIF
           VN_MAX_COUNT = 1 THEN
           SPL_SPN_ERROR_LOGGING_SPK.INFO_PROC
                                    (IC_PACKAGE_NAME    => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                                    ,IC_PROCEDURE_NAME  => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                                    ,IN_BATCH_ID        => '100'
                                    ,IC_MESSAGE_TEXT    => 'exact patient unique scenario'||' vn_max_count:'||VN_MAX_COUNT);
           OPEN VR_QUES_AND_ANS FOR                                 
           SELECT DISTINCT IAM.QUESTION_CODE,
                  (SELECT DISTINCT CASE
                                   WHEN EAD.ANSWER IS NULL THEN NULL
                                   WHEN LENGTH(TRIM(TRANSLATE(EAD.ANSWER, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', ' '))) IS NULL THEN EAD.ANSWER
                                   ELSE TO_CHAR(TRUNC(EAD.ANSWER *  DECODE(UPPER(IAM.UOM), 'KGS', 2.20462,1),2))
                                   END
                    FROM  EMR_ADTAOE_DTL EAD , TEST T
                    WHERE T.TEST_ID = EAD.TEST_ID
                    AND   IAM.TEST_CODE = T.TEST_CODE
                    AND   EAD.SOURCE_SYSTEM = IAM.SOURCE_SYSTEM
                    AND   EAD.QUESTION_CODE = IAM.QUESTION_CODE
                    AND   EAD.PATIENT_ID    = IN_PATIENT_ID
                    AND   EAD.FACILITY_ID   = IN_FACILITY_ID
                    AND   (TRUNC(EAD.DRAW_DATE)    = IN_DRAW_DT
                            OR TRUNC(EAD.DRAW_DATE) = TRUNC(TO_DATE('12-31-2999','mm-dd-yyyy')))
                    AND   EAD.SOURCE_SYSTEM = IN_CORP_ACRONYM
                    AND   EAD.ANSWER IS NOT NULL
                    AND   EAD.STATUS = DECODE(IAM.MATCH_TYPE, 'AT', EAD.STATUS, 'N')
                    ) AS ANSWER
            FROM INTERFACE_ADT_AOE_MASTER IAM
            WHERE IAM.SOURCE_SYSTEM = IN_CORP_ACRONYM
            AND IAM.TEST_CODE IN  (SELECT ORD.TEST_CODE
                                     FROM ORDER_REQUISITION_DETAIL ORD
                                    WHERE ORD.REQUISITION_HDR_ID = (SELECT ORH.REQUISITION_HDR_ID
                                                                      FROM ORDER_REQUISITION_HEADER ORH
                                                                     WHERE ORH.REQUISITION_NUMBER = IN_REQUISITION_NUMBER));
         END IF;                           
         OR_QUES_AND_ANS := VR_QUES_AND_ANS;
        SPL_SPN_ERROR_LOGGING_SPK.INFO_PROC
                      (IC_PACKAGE_NAME    => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                      ,IC_PROCEDURE_NAME  => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                      ,IN_BATCH_ID        => '100'
                      ,IC_MESSAGE_TEXT    => 'vc_exact_boolean_val:'||VC_EXACT_BOOLEAN_VAL||
                                             ' vc_exact_par_boolean_val:'||VC_EXACT_PAR_BOOLEAN_VAL||
                                             ' OV_COMMENTS:'||OV_COMMENTS);
      END IF;               
      IF
          VC_DUPL_BOOLEAN_VAL = 'TRUE' AND
          VC_DUPL_PAR_BOOLEAN_VAL = 'FALSE' THEN
          OV_COMMENTS := VC_COMMENTS;
          VC_EXACT_BOOLEAN_VAL        := NULL;
          VC_EXACT_PAR_BOOLEAN_VAL    := NULL;
          VC_REJECTED_BOOLEAN_VAL     := NULL;
          VC_REJECTED_PAR_BOOLEAN_VAL := NULL;
          VC_RETURN_DUPL_PAT := 'Y';
      ELSIF
         --VC_DUPL_BOOLEAN_VAL = 'TRUE' AND
         VC_DUPL_PAR_BOOLEAN_VAL = 'TRUE' THEN
         OV_COMMENTS := VC_PAR_COMMENTS;
         VC_EXACT_BOOLEAN_VAL        := NULL;
         VC_EXACT_PAR_BOOLEAN_VAL    := NULL;
         VC_REJECTED_BOOLEAN_VAL     := NULL;
         VC_REJECTED_PAR_BOOLEAN_VAL := NULL;
         VC_RETURN_DUPL_PAT := 'Y';
      END IF;
      IF
        VC_RETURN_DUPL_PAT = 'Y' THEN
        --Returning result set (OV_COMMENTS,Question and Answer) for the duplicate patient.(Case 3 (AOE) and 4 (PARTIAL AOE))
        SELECT MAX (SUB.COUNT_QUES_ANS)
        INTO VN_MAX_COUNT FROM (SELECT COUNT(*) OVER (PARTITION BY EAD.QUESTION_CODE, EAD.ANSWER) AS COUNT_QUES_ANS
                                FROM  EMR_ADTAOE_DTL EAD , INTERFACE_ADT_AOE_MASTER IAM, TEST T
                                WHERE T.TEST_ID = EAD.TEST_ID
                                AND   IAM.TEST_CODE = T.TEST_CODE
                                AND   EAD.SOURCE_SYSTEM = IAM.SOURCE_SYSTEM
                                AND   EAD.QUESTION_CODE = IAM.QUESTION_CODE
                                AND   EAD.PATIENT_ID    = VN_DUPL_PAT_ID
                                AND   EAD.FACILITY_ID   = IN_FACILITY_ID
                                AND   (TRUNC(EAD.DRAW_DATE)   = IN_DRAW_DT
                                      OR TRUNC(EAD.DRAW_DATE) = TRUNC(TO_DATE('12-31-2999','mm-dd-yyyy')))
                                AND   EAD.SOURCE_SYSTEM = IN_REQUISITION_NUMBER) SUB;
         IF
            VN_MAX_COUNT > 1 THEN
            SPL_SPN_ERROR_LOGGING_SPK.INFO_PROC
                                    (IC_PACKAGE_NAME    => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                                    ,IC_PROCEDURE_NAME  => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                                    ,IN_BATCH_ID        => '100'
                                    ,IC_MESSAGE_TEXT    => 'duplicate patient duplicate scenario'||' vn_max_count:'||VN_MAX_COUNT);
            OPEN VR_QUES_AND_ANS FOR                                 
            SELECT DISTINCT IAM.QUESTION_CODE,
                  (SELECT DISTINCT CASE
                                   WHEN EAD.ANSWER IS NULL THEN NULL
                                   WHEN LENGTH(TRIM(TRANSLATE(EAD.ANSWER, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', ' '))) IS NULL THEN EAD.ANSWER
                                   ELSE TO_CHAR(TRUNC(EAD.ANSWER *  DECODE(UPPER(IAM.UOM), 'KGS', 2.20462,1),2))
                                   END
                    FROM  EMR_ADTAOE_DTL EAD , TEST T
                    WHERE T.TEST_ID = EAD.TEST_ID
                    AND   IAM.TEST_CODE = T.TEST_CODE
                    AND   EAD.SOURCE_SYSTEM = IAM.SOURCE_SYSTEM
                    AND   EAD.QUESTION_CODE = IAM.QUESTION_CODE
                    AND   EAD.PATIENT_ID    = VN_DUPL_PAT_ID
                    AND   EAD.FACILITY_ID   = IN_FACILITY_ID
                    AND   (TRUNC(EAD.DRAW_DATE)    = IN_DRAW_DT
                            OR TRUNC(EAD.DRAW_DATE) = TRUNC(TO_DATE('12-31-2999','mm-dd-yyyy')))
                    AND   EAD.SOURCE_SYSTEM = IN_CORP_ACRONYM
                    AND   EAD.ANSWER IS NOT NULL
                    AND   EAD.STATUS = DECODE(IAM.MATCH_TYPE, 'AT', EAD.STATUS, 'N')
                    ) AS ANSWER
            FROM INTERFACE_ADT_AOE_MASTER IAM
            WHERE IAM.SOURCE_SYSTEM = IN_CORP_ACRONYM
            AND IAM.TEST_CODE IN  (SELECT ORD.TEST_CODE
                                     FROM ORDER_REQUISITION_DETAIL ORD
                                    WHERE ORD.REQUISITION_HDR_ID = (SELECT ORH.REQUISITION_HDR_ID
                                                                      FROM ORDER_REQUISITION_HEADER ORH
                                                                     WHERE ORH.REQUISITION_NUMBER = IN_REQUISITION_NUMBER)   
                                    AND EXISTS (SELECT 1 FROM EMR_ADTAOE_DTL EAD1, INTERFACE_ADT_AOE_MASTER IAM1, TEST T1
                                                 WHERE  ORD.TEST_ID = EAD1.TEST_ID
                                                  AND   IAM1.TEST_CODE = T1.TEST_CODE
                                                  AND   EAD1.SOURCE_SYSTEM = IAM1.SOURCE_SYSTEM
                                                  AND   EAD1.QUESTION_CODE = IAM1.QUESTION_CODE
                                                  AND   EAD1.PATIENT_ID    = VN_DUPL_PAT_ID
                                                  AND   EAD1.FACILITY_ID   = IN_FACILITY_ID
                                                  AND   (TRUNC(EAD1.DRAW_DATE)    = IN_DRAW_DT
                                                        OR TRUNC(EAD1.DRAW_DATE) = TRUNC(TO_DATE('12-31-2999','mm-dd-yyyy')))
                                                  AND   EAD1.SOURCE_SYSTEM = IN_CORP_ACRONYM
                                                  AND   EAD1.ANSWER IS NOT NULL
                                                  AND   EAD1.STATUS = DECODE(IAM1.MATCH_TYPE, 'AT', EAD1.STATUS, 'N')));
         ELSIF
           VN_MAX_COUNT = 1 THEN
            SPL_SPN_ERROR_LOGGING_SPK.INFO_PROC
                                    (IC_PACKAGE_NAME    => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                                    ,IC_PROCEDURE_NAME  => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                                    ,IN_BATCH_ID        => '100'
                                    ,IC_MESSAGE_TEXT    => 'duplicate patient unique scenario'||' vn_max_count:'||VN_MAX_COUNT);
            OPEN VR_QUES_AND_ANS FOR                                 
            SELECT DISTINCT IAM.QUESTION_CODE,
                  (SELECT DISTINCT CASE
                                   WHEN EAD.ANSWER IS NULL THEN NULL
                                   WHEN LENGTH(TRIM(TRANSLATE(EAD.ANSWER, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', ' '))) IS NULL THEN EAD.ANSWER
                                   ELSE TO_CHAR(TRUNC(EAD.ANSWER *  DECODE(UPPER(IAM.UOM), 'KGS', 2.20462,1),2))
                                   END
                    FROM  EMR_ADTAOE_DTL EAD , TEST T
                    WHERE T.TEST_ID = EAD.TEST_ID
                    AND   IAM.TEST_CODE = T.TEST_CODE
                    AND   EAD.SOURCE_SYSTEM = IAM.SOURCE_SYSTEM
                    AND   EAD.QUESTION_CODE = IAM.QUESTION_CODE
                    AND   EAD.PATIENT_ID    = VN_DUPL_PAT_ID
                    AND   EAD.FACILITY_ID   = IN_FACILITY_ID
                    AND   (TRUNC(EAD.DRAW_DATE)    = IN_DRAW_DT
                            OR TRUNC(EAD.DRAW_DATE) = TRUNC(TO_DATE('12-31-2999','mm-dd-yyyy')))
                    AND   EAD.SOURCE_SYSTEM = IN_CORP_ACRONYM
                    AND   EAD.ANSWER IS NOT NULL
                    AND   EAD.STATUS = DECODE(IAM.MATCH_TYPE, 'AT', EAD.STATUS, 'N')
                    ) AS ANSWER
            FROM INTERFACE_ADT_AOE_MASTER IAM
            WHERE IAM.SOURCE_SYSTEM = IN_CORP_ACRONYM
            AND IAM.TEST_CODE IN  (SELECT ORD.TEST_CODE
                                     FROM ORDER_REQUISITION_DETAIL ORD
                                    WHERE ORD.REQUISITION_HDR_ID = (SELECT ORH.REQUISITION_HDR_ID
                                                                      FROM ORDER_REQUISITION_HEADER ORH
                                                                     WHERE ORH.REQUISITION_NUMBER = IN_REQUISITION_NUMBER));
         END IF; 
        OR_QUES_AND_ANS := VR_QUES_AND_ANS;
        SPL_SPN_ERROR_LOGGING_SPK.INFO_PROC
                      (IC_PACKAGE_NAME    => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                      ,IC_PROCEDURE_NAME  => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                      ,IN_BATCH_ID        => '100'
                      ,IC_MESSAGE_TEXT    => 'vc_dup_pat_ques:'||VC_DUP_PAT_QUES||
                                             ' vc_dupl_boolean_val:'||VC_DUPL_BOOLEAN_VAL||
                                             ' vc_dupl_par_boolean_val:'||VC_DUPL_PAR_BOOLEAN_VAL||
                                             ' OV_COMMENTS:'||OV_COMMENTS);
      END IF;               
      IF
         VC_REJECTED_BOOLEAN_VAL = 'TRUE' AND
         VC_REJECTED_PAR_BOOLEAN_VAL = 'FALSE' THEN
         OV_COMMENTS := VC_COMMENTS;
         VC_EXACT_BOOLEAN_VAL        := NULL;
         VC_EXACT_PAR_BOOLEAN_VAL    := NULL;
         VC_DUPL_BOOLEAN_VAL         := NULL;
         VC_DUPL_PAR_BOOLEAN_VAL     := NULL;
         VC_RETURN_REJECT_PAT := 'Y';
      ELSIF
         --VC_REJECTED_BOOLEAN_VAL = 'FALSE' AND
         VC_REJECTED_PAR_BOOLEAN_VAL = 'TRUE' THEN
         OV_COMMENTS := VC_PAR_COMMENTS;
         VC_EXACT_BOOLEAN_VAL        := NULL;
         VC_EXACT_PAR_BOOLEAN_VAL    := NULL;
         VC_DUPL_BOOLEAN_VAL         := NULL;
         VC_DUPL_PAR_BOOLEAN_VAL     := NULL;
         VC_RETURN_REJECT_PAT := 'Y';
      ELSIF
         VC_REJECTED_BOOLEAN_VAL = 'FALSE' AND
         VC_REJECTED_PAR_BOOLEAN_VAL = 'FALSE' THEN
         --Returning result set (OV_COMMENTS) for the rejected ADT.(Case 7)
         OV_COMMENTS := 'AOE NOT RECEIVED IN ADT';
         OR_QUES_AND_ANS := NULL;
         SPL_SPN_ERROR_LOGGING_SPK.INFO_PROC
                        (IC_PACKAGE_NAME    => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                        ,IC_PROCEDURE_NAME  => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                        ,IN_BATCH_ID        => '100'
                        ,IC_MESSAGE_TEXT    => 'vc_obx_ques:'||VC_OBX_QUES||
                                               ' vc_rejected_boolean_val:'||VC_REJECTED_BOOLEAN_VAL||
                                               ' vc_rejected_par_boolean_val:'||VC_REJECTED_PAR_BOOLEAN_VAL||
                                               ' OV_COMMENTS:'||OV_COMMENTS);
         VC_EXACT_BOOLEAN_VAL        := NULL;
         VC_EXACT_PAR_BOOLEAN_VAL    := NULL;
         VC_DUPL_BOOLEAN_VAL         := NULL;
         VC_DUPL_PAR_BOOLEAN_VAL     := NULL;
      END IF;
      IF
        VC_RETURN_REJECT_PAT = 'Y' THEN
        --Returning result set (OV_COMMENTS,Question and Answer) for the rejected ADT.(Case 5 (AOE) and 6 (PARTIAL AOE))
        --In case of multiple external id with same patient, facility and draw date; the lastest record should be picked.
        SELECT MAX(MSG_ID) INTO VN_MAX_MSG_ID FROM TT_A04_OBX_QUES_ANS_DTL;
        OPEN VR_QUES_AND_ANS FOR
        SELECT DISTINCT IAM.QUESTION_CODE,
                       (SELECT DISTINCT
                         CASE
                            WHEN TOBX.OBSERVATION_VALUE IS NULL THEN NULL
                            WHEN LENGTH(TRIM(TRANSLATE(TOBX.OBSERVATION_VALUE, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', ' '))) IS NULL THEN TOBX.OBSERVATION_VALUE
                            ELSE TO_CHAR(TRUNC(TOBX.OBSERVATION_VALUE *  DECODE(UPPER(TOBX.UOM), 'KGS', 2.20462,1),2))
                         END
                         FROM TT_A04_OBX_QUES_ANS_DTL TOBX
                        WHERE TOBX.OBSERVATION_IDENTIFIER = IAM.QUESTION_CODE
                          AND TOBX.MSG_ID = VN_MAX_MSG_ID) AS ANSWER
         FROM INTERFACE_ADT_AOE_MASTER IAM
        WHERE SOURCE_SYSTEM = IN_CORP_ACRONYM;
        OR_QUES_AND_ANS := VR_QUES_AND_ANS;
        SPL_SPN_ERROR_LOGGING_SPK.INFO_PROC
                        (IC_PACKAGE_NAME    => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                        ,IC_PROCEDURE_NAME  => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                        ,IN_BATCH_ID        => '100'
                        ,IC_MESSAGE_TEXT    => 'vc_rejected_boolean_val:'||VC_REJECTED_BOOLEAN_VAL||
                                               ' vc_rejected_par_boolean_val:'||VC_REJECTED_PAR_BOOLEAN_VAL||
                                               ' OV_COMMENTS:'||OV_COMMENTS);
      END IF;
       SPL_SPN_ERROR_LOGGING_SPK.INFO_PROC
                        (IC_PACKAGE_NAME    => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                        ,IC_PROCEDURE_NAME  => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                        ,IN_BATCH_ID        => '100'
                        ,IC_MESSAGE_TEXT    => 'End of the procedure with Patient_Id:'||IN_PATIENT_ID||' Facility_Id:'||IN_FACILITY_ID||
                                               ' Draw_Dt:'||IN_DRAW_DT||' Requisition_Number:'||IN_REQUISITION_NUMBER||' Corp_Acronym:'||IN_CORP_ACRONYM||
                                               ' ABCDEF_Mrn:'||IN_ABCDEF_MRN||' Account_Number:'||IN_ACCOUNT_NUMBER||' Hlab_Num:'||IN_HLAB_NUM);
    EXCEPTION
      WHEN NO_DATA_FOUND THEN
        SPL_SPN_ERROR_LOGGING_SPK.ERROR_PROC
                        (IC_PACKAGE_NAME    => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                        ,IC_PROCEDURE_NAME  => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                        ,IN_BATCH_ID        => '100'
                        ,IC_MESSAGE_TEXT    => SQLERRM);
      WHEN OTHERS THEN
        SPL_SPN_ERROR_LOGGING_SPK.ERROR_PROC
                        (IC_PACKAGE_NAME    => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                        ,IC_PROCEDURE_NAME  => 'SPL_SPN_MISSING_EMR_AOE_DTL'
                        ,IN_BATCH_ID        => '100'
                        ,IC_MESSAGE_TEXT    => SQLERRM);
    END SPL_SPN_MISSING_EMR_AOE_DTL;
    Regards,
    BS2012.

    Hey Guys,
    I'm sorry, that I troubled you all. But I found the issue and solved it.
    The actual problem is residing at that max of that partition by query. I had a misconception that this query will always return a value which is positive number like 1,2 etc.
    But sometimes it's returning null as well. So the ref cursor is fetching nothing. Now I've modified my code and everything is working fine. Thanks for your help and support.
    Regards,
    BS2012.

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    Edited by: user8897365 on 24-Aug-2011 10:32

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    Hi
    i came across the below reply for a thread with the similar query as above.
    <<
    Justin Cave
    Posts: 10,696
    From: Michigan, USA
    Registered: 10/11/99
    Re: sort data in ref cursor
    Posted: Feb 3, 2005 10:30 AM in response to: [email protected] Reply
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    Distributed Database Consulting, Inc.
    http://www.ddbcinc.com/askDDBC
    >>
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