我有一个包含关系数据的XML,例如
<object name="object1">
<attribute name="attribute1"/>
<attribute name="attribute2">
<value>value 1</value>
<value>value 2</value>
</attribute>
</object>
<object name="object2">
<attribute name="attribute1"/>
<attribute name="attribute2">
<value>value 1</value>
<value>value 2</value>
</attribute>
</object>
我需要将其存储到以下关系模型中:
表对象
表格属性FK到对象
表值FK属性
使用XMLTable函数我提出了以下解决方案:
declare
-- This cursor retreives a record for each object with it's attribute values and
-- the underlying attributes as XMLtype
cursor c_object(p_xml xmltype) is
select obj.*
from xmltable('$d//object' passing p_xml as "d"
columns ... object columns ...
,attributes xmltype path 'attribute') as obj;
-- This cursor retreives a record for each attribute with it's attribute values and
-- the underlying values as XMLtype
cursor c_attributes(p_xml xmltype) is
select att.*
from xmltable('$d//object' passing p_xml as "d"
columns ... attribute columns ...
,values xmltype path 'value') as att;
-- This cursor retreives a record for each attribute with it's attribute values and
-- the underlying values as XMLtype
cursor c_values(p_xml xmltype) is
select val.*
from xmltable('$d//object' passing p_xml as "d"
,columns value varcahr2(100) path 'value') as val;
begin
-- p_xml contains the XML document
for r_obj in c_obj(p_xml) loop
-- insert an object record
insert into object...
for r_att in c_att(r_obj.attributes) loop
-- insert into attribute
insert into attribute ...
for r_val in c_val(r_att.values) loop
-- insert into values
end loop;
end loop;
end loop;
end;
这是正确的方法吗?或者你会怎么做?
答案 0 :(得分:0)
我很抱歉这是非常不完整的,但我希望它能朝着正确的方向发展。
您的解决方案进行了大量的XML解析。它可能有用,但是如果有很多数据要处理,我会想象它需要一段时间。索引XML可能会有所帮助,并可能使您的方法可以接受。
更好的解决方案可能是使用DBMS_XMLSAVE
或DBMS_XMLSTORE
个包。