Question

我有以下xml

<EmployeeList>
  <Employee>
    <EmpID>11</EmpID>
    <EmpName>ABC</EmpName>
  </Employee>
  <Employee>
    <EmpID>12</EmpID>
    <EmpName>XYZ</EmpName>
  </Employee>
</EmployeeList>

我想根据Employee in的计数将元素值插入到Employee表

我有员工表，其id和名称为列。

我收到了以下代码段

declare xml_content text;
declare v_row_index int unsigned default 0;   
declare v_row_count int unsigned;  
declare v_xpath_row varchar(255); 

set xml_content = load_file(path);

-- calculate the number of row elements.   
set v_row_count  = extractValue(xml_content, concat('count(', node, ')')); 

-- loop through all the row elements    
while v_row_index < v_row_count do                
    set v_row_index = v_row_index + 1;        
    set v_xpath_row = concat(node, '[', v_row_index, ']/@*');
    insert into applicants values (
        extractValue(xml_content, concat(v_xpath_row, '[1]')),
        extractValue(xml_content, concat(v_xpath_row, '[2]'))
    );
end while;

以上仅适用于属性值。

到目前为止，我所做的是：

-- loop through all the row elements    
    while v_row_index < v_row_count do                
        set v_row_index = v_row_index + 1;        
        set v_xpath_row = concat(node, '[', v_row_index, ']/@*');
set @I=1,@j=2;
        insert into applicants values (
            extractValue(xml_content, '//Employee[$@i]'),
            extractValue(xml_content, '//Employee[$@j]')
        );
    end while;

我要做的是：

我有一个如上所述的xml。其中有两个Employee记录。想在Employee表中插入那些

Answer 1

您可以创建一个如图所示的过程来读取XML并插入表中：

DELIMITER $$
CREATE PROCEDURE `import_applicant_xml`()
BEGIN
    declare path varchar(255);
    declare node varchar(255);
    declare xml_content text;
    declare v_row_index int unsigned default 0;   
    declare v_row_count int unsigned;  
    declare v_empID varchar(255); 
    declare v_empName varchar(255); 
    set path = 'C:\\demo\\employee.xml';
    set node = 'Employee';
    set xml_content = load_file(path);

    -- calculate the number of row elements.   
    set v_row_count  = extractValue(xml_content, concat('count(//', node, ')')); 
    -- loop through all the row elements    
    while v_row_index < v_row_count do                
        set v_row_index = v_row_index + 1;        
        set v_empID = concat('//',node, '[', v_row_index, ']/EmpID');
        set v_empName = concat('//',node, '[', v_row_index, ']/EmpName');
        insert into employee values (
            extractValue(xml_content,v_empID),
            extractValue(xml_content, v_empName)
        );
    end while;
END

您可以将路径和节点值作为IN PARAMETERS传递给过程，并使其更具动态性。

使用extractValue从MySql中的元素获取值

1 个答案: