使用可選參數調用存儲過程

Question

基本上我有一個存儲過程，它接受8個參數，並基於所有這些參數只執行查詢並給出輸出，但現在我有一種情況，即可以通過單值或多值，在1到8個參數之間的任何地方，它應該完美地工作，並且它應該基於已經傳遞的參數返回一些值。 我的StoredProcedure在MySQL中，我通過Java代碼中的CallableStatement調用它。 以下是我的StoredProcedure的片段。

DELIMITER $$ 


CREATE PROCEDURE get_details(IN cus_name varchar(255),u_id int, ent_type varchar(255) 
,branchId varchar(255), from_date datetime,to_date datetime, val varchar(255),rep_status varchar(255) 
) 
BEGIN 
SELECT 
r.id,r.parent_request_id,r.customer_master_id, 
r.user_master_id,r.request_status, 

cm.customer_name, 

u.unique_id, 

c.branch_id,c.created_date,c.entity_name, 
c.entity_status,c.entity_type,c.no_of_documents, 
c.no_of_parties,c.request_id,c.validity,c.itr_validity 

FROM request as r 
left join user_master as u on r.user_master_id = u.id 
left join customer_master as cm on u.customer_master_id = cm.id 
left join customer_entity as c on r.id= c.request_id 

where 
customer_name = cus_name and 
unique_id = u_id and 
entity_type = ent_type and 
branch_id = branchId and 
created_date >= from_date and 
created_date <= to_date and 
validity = val and 
request_status = rep_status and 
entity_status='parent'; 

END$$ 
DELIMITER ; 

和下面是我的代碼來調用這個StoredProcedure的Java中

String query = "{ call get_details(?,?,?,?,?,?,?,?)}"; 
      ResultSet resultSet = null; 
      List<SuperAdmin> admins = new ArrayList<SuperAdmin>(); 
      try(
        Connection connection = getconnection(); 
        CallableStatement callableStatement = connection.prepareCall(query)){ 
       if(ReportDTO.getCustomerName() != null){ 
       callableStatement.setString(1, ReportDTO.getCustomerName()); 
       } 
       if(ReportDTO.getUniqueId() != null){ 
       callableStatement.setString(2, ReportDTO.getUniqueId()); 
       } 
       if(ReportDTO.getEntity_type() != null){ 
       callableStatement.setString(3, ReportDTO.getEntity_type()); 
       } 
       if(ReportDTO.getBranchId() != null){ 
       callableStatement.setString(4, ReportDTO.getBranchId().toString()); 
       } 
       if(ReportDTO.getFilter_from() != null){ 
        Date newFilterDate_from = dateFormat.parse(ReportDTO.getFilter_from().toString()); 
        String newFormattedDate = dateFormat2.format(newFilterDate_from); 
        callableStatement.setString(5, newFormattedDate); 
       } 
       if(ReportDTO.getFilter_to() != null){ 
        Date newFilterDate_to = (Date) dateFormat.parse(ReportDTO.getFilter_to().toString()); 
        String newFormattedDateTo = dateFormat2.format(newFilterDate_to); 
        callableStatement.setString(6,newFormattedDateTo); 
       } 
       if(ReportDTO.getValidity() != null){ 
       callableStatement.setString(7, ReportDTO.getValidity()); 
       } 
       if(ReportDTO.getReport_status() != null){ 
       callableStatement.setString(8, ReportDTO.getReport_status()); 
       } 
       resultSet = callableStatement.executeQuery(); 
       while(resultSet.next()){ 
        SuperAdmin sAdmin = new SuperAdmin(); 
        sAdmin.setRequest_status(resultSet.getString("request_status")); 
        sAdmin.setCustomer_entity_type(resultSet.getString("entity_type")); 
        sAdmin.setCustomer_entity_name(resultSet.getString("entity_name")); 
        sAdmin.setRequest_id(resultSet.getInt("id")); 
        sAdmin.setCustomer_entity_created_date(resultSet.getDate("created_date")); 
        sAdmin.setCustomer_entity_status(resultSet.getString("entity_status")); 
        sAdmin.setCustomer_entity_no_of_documents(resultSet.getString("no_of_documents")); 
        sAdmin.setCustomer_entity_no_of_parties(resultSet.getString("no_of_parties")); 
        sAdmin.setCustomer_entity_validity(resultSet.getString("validity")); 
        sAdmin.setCustomer_entity_itr_validity(resultSet.getString("itr_validity")); 
        sAdmin.setCustomer_entity_branch_id(resultSet.getLong("branch_id")); 
        admins.add(sAdmin); 
       } 

      } 

任何幫助將是非常appreciable.Thanks提前做好。

Answer 1

對於存儲過程中的可選參數，你可以這樣寫

CREATE PROCEDURE get_details(IN cus_name varchar(255)='',u_id int=0, ent_type varchar(255)='', 
branchId varchar(255)='', from_date datetime=null,to_date datetime=null, val varchar(255)='',rep_status varchar(255)='' 
) 
BEGIN 
you query syntex