MySQL存储过程不起作用 - 为什么？

Question

我在java中使用了以下存储过程来处理我的项目。但我没有得到任何结果集。请帮我解决这个存储过程中的任何错误。

我想在MySQL中创建存储过程。如果你可以帮助我在MySQL中创建它，那将是很棒的。

请检查以下存储过程。

    CREATE DEFINER=`Archu`@`localhost` PROCEDURE `UserReportAdminProc`(IN `WHEREClause` VARCHAR(1), IN `grname` VARCHAR(100), IN `goldcpa` VARCHAR(100), IN `username` VARCHAR(50), IN `fname` VARCHAR(50), IN `lname` VARCHAR(50), IN `ssn` VARCHAR(50), IN `email` VARCHAR(50), IN `gtxkey` VARCHAR(50), IN `dcn` VARCHAR(50), IN `pin` VARCHAR(50), IN `and_or` VARCHAR(16), IN `regdate1` VARCHAR(16), IN `regdate2` VARCHAR(16), IN `efileddate1` VARCHAR(16), IN `efileddate2` VARCHAR(16), IN `paiddate1` VARCHAR(16), IN `paiddate2` VARCHAR(16), IN `efiled` VARCHAR(1), IN `federalstatus` VARCHAR(10), IN `pkg` VARCHAR(10), IN `cpaname` VARCHAR(1000), IN `ExtraWHEREClause` VARCHAR(1000), OUT `colnames` VARCHAR(400))
DETERMINISTIC
Begin
    declare SQLStatement  varchar(8000);
    if(WHEREClause !='') then
        if(and_or='and') then
        SELECT SQLStatement ='SELECT '+colnames+' FROM user_states_ord_return_list where username is not null ';        
    else if(and_or='or') then
        SELECT SQLStatement ='SELECT '+colnames+' FROM user_states_ord_return_list where username is null ';    
        else if((regdate1!='' and regdate1 != ' 00:00') and (regdate2!='' and regdate2 != ' 23:59')) then
         SELECT SQLStatement = SQLStatement+and_or+' User_Created_Date BETWEEN '+regdate1+' and '+regdate2;
        else if(grname!='' and goldcpa!='') then
         SELECT SQLStatement = SQLStatement+' and GroupName in ('+grname+', '+goldcpa+')  ';
    else if(username!='') then
         SELECT SQLStatement = SQLStatement+and_or+' username Like '+username+'%';
        else if(fname!='') then
         SELECT SQLStatement = SQLStatement+and_or+' First_Name Like '+fname+'%';
    else if(lname!='') then
         SELECT SQLStatement = SQLStatement+and_or+' Last_Name Like '+lname+'%';
    else if(ssn!='') then
         SELECT SQLStatement = SQLStatement+and_or+' SSN Like '+ssn+'%';
        else if(email!='') then
        SELECT SQLStatement = SQLStatement+and_or+' EMail Like '+email+'%';
    else if(gtxkey!='') then
        SELECT SQLStatement = SQLStatement+and_or+' GTXKey Like '+gtxkey+'%';
    else if(dcn!='') then
            SELECT SQLStatement = SQLStatement+and_or+' DCN Like '+dcn+'%';         
    else if(pin!='') then
        SELECT SQLStatement = SQLStatement+and_or+' PIN Like '+pin+'%';
    else if((efileddate1!='' and efileddate1 != ' 00:00') and (efileddate2!='' and efileddate2 != ' 23:59')) then
        SELECT SQLStatement = SQLStatement+and_or+'  EFile_Created_Date BETWEEN '+efileddate1+' and '+efileddate2;
    else if((paiddate1 != '' and paiddate1 !=  ' 00:00') and (paiddate2 != '' and paiddate2!= ' 23:59')) then
         SELECT SQLStatement = SQLStatement+and_or+' Paid_Date BETWEEN '+paiddate1+' and '+paiddate2; 
        else if(efiled != '') then
         SELECT SQLStatement = SQLStatement+and_or+' EFile_Status='+efiled;
    else if(federalstatus != '')     then           
        SELECT SQLStatement = SQLStatement+and_or+' Federal_EFile_Status='+federalstatus;
    else if(pkg != '') then
    Begin
         SELECT SQLStatement = SQLStatement+and_or+' Package_Selected='+pkg;
    End;                    
    else if(cpaname != '') then
        SELECT SQLStatement = SQLStatement+and_or+' CPA_Name Like'+cpaname;
    else if(ExtraWHEREClause != '') then            SELECT SQLStatement = SQLStatement+ ExtraWHEREClause;
        else
        SELECT SQLStatement ='SELECT  '+colnames+'  FROM user_states_ord_return_list ';
        END IF;
    END IF;
    END IF;
    END IF;
    END IF;
        END IF;
    END IF;
    END IF;
    END IF;
    END IF;
    END IF;
        END IF;
        END IF;
        END IF;
        End IF;
        End IF;
        End IF;
        End If;
        End IF;
        End IF;
        SET colnames = SQLStatement;
        End