Oracle存储过程不返回结果

Question

我的Oracle存储过程不会返回任何结果。我已经在SPROC之外测试了查询，它似乎返回值。我有一种感觉它与我如何传递样本和测试参数有关 - 因为如果我在存储过程中对sampleNumber和testNumber参数进行硬编码，则结果会正确返回。我已粘贴过程和PLSQL声明。我是编写Oracle程序的新手，非常感谢任何帮助。谢谢。

    CREATE OR REPLACE PROCEDURE TESTANALYSIS
    (vOrderNumber IN VARCHAR2
    , vTestNumber IN NUMBER
    , vSampleNumber IN NUMBER
    ) 

    AS

    anVar VARCHAR2(50) := NULL;

    BEGIN

    SELECT T.ANALYSIS INTO anVar FROM TEST T JOIN SAMPLE S
    ON T.SAMPLE_NUMBER = S.SAMPLE_NUMBER
    WHERE T.TEST_NUMBER = vTestNumber
    AND S.SAMPLE_NUMBER = vSampleNumber
    AND S.ORDER_NUM = vOrderNumber;

    dbms_output.put_line(anVar);

    END TESTANALYSIS;


    --PL SQL Call 
    SET SERVEROUTPUT ON
    EXEC TESTANALYSIS('4200010061', 720000050516, 14789)
    /