Oracle XMLTABLE函数无法正确获取数据 [英] Oracle XMLTABLE function not fetching data correctly

问题描述

我正在使用Oracle 11g XMLTABLE函数从附加的XML文件中获取数据.当我执行代码时，我得到3行.我正在正确检索产品，为与客户相对应的每个产品生成一行.问题是我没有得到其余的客户数据，而客户名，客户DOB和客户电子邮件都为空.由于某种原因，我正在使用的代码Oracle没有将其升级2个级别.请帮忙！我在做什么错了?

I am using Oracle 11g XMLTABLE function to fetch data from the attached XML file. When I execute the code, I get 3 rows. I am retrieving the Products correctly generating one row for each Product corresponding to a Customer. The problem is that I'm not getting the rest of the Customer data, I' getting nulls for CustomerName, CustomerDOB, and CustomerEmail. For some reason the code that I am using, Oracle is not fetching 2 levels up. Please help! What am I doing wrong?

<?xml version="1.0" encoding="iso-8859-1"?>
<USACustomers>
    <NewYorkCustomers>
        <Customer>
            <CustomerData>
                <CustomerName>John Stark</CustomerName>
                <CustomerDOB>07/09/1973</CustomerDOB>
                <CustomerEmail>[e-mail]</CustomerEmail>
            </CustomerData>
            <CustomerAddress>
                <Address>400 Railroad Way</Address>
                <City>Larchmont</City>
                <State>NY</State>
                <Zip>10542</Zip>
            </CustomerAddress>
            <CustomerProducts>
                <CustomerProduct>
                    <PoductType>CTD</PoductType>
                    <ProductNumber>2050035302</ProductNumber>
                </CustomerProduct>
                <CustomerProduct>
                    <PoductType>REC</PoductType>
                    <ProductNumber>2050920400</ProductNumber>
                </CustomerProduct>
            </CustomerProducts>
        </Customer>
        <Customer>
            <CustomerData>
                <CustomerName>Maria Stark</CustomerName>
                <CustomerDOB>07/09/1972</CustomerDOB>
                <CustomerEmail>[e-mail]</CustomerEmail>
            </CustomerData>
            <CustomerAddress>
                <Address>410 Railroad Way</Address>
                <City>Larchmont</City>
                <State>NY</State>
                <Zip>10542</Zip>
            </CustomerAddress>
            <CustomerProducts>
                <CustomerProduct>
                    <PoductType>REC</PoductType>
                    <ProductNumber>2050920400</ProductNumber>
                </CustomerProduct>
            </CustomerProducts>
        </Customer>
    </NewYorkCustomers>
</USACustomers>

CODE

SELECT                            
CustomerName,
CustomerDOB,
CustomerEmail,
PoductType


FROM   XMLTABLE (                    '/USACustomers/NewYorkCustomers/Customer/CustomerProducts/CustomerProduct'
PASSING xmltype (BFILENAME ('BACKUP', 'TEST.xml'), NLS_CHARSET_ID ('AL32UTF8'))

COLUMNS CustomerName  VARCHAR2(50)    PATH 'CustomerData/CustomerName',
        CustomerDOB   VARCHAR2(50)    PATH 'CustomerData/CustomerDOB',
        CustomerEmail VARCHAR2(50)    PATH 'CustomerData/CustomerEmail',
        PoductType    VARCHAR2(50)    PATH 'PoductType',
        ProductNumber VARCHAR2(50)    PATH 'ProductNumber');

推荐答案

您可以这样操作(只需调用一个xmltable():

You can do it like this (with one xmltable() call:

SELECT                            
CustomerName,
CustomerDOB,
CustomerEmail,
PoductType


FROM   XMLTABLE ('for $i in $custt/USACustomers/NewYorkCustomers/Customer, 
                 $j in $i//CustomerProduct 
                 return <deNormalizedCust>{$i//CustomerData}{$j}</deNormalizedCust>'
PASSING xmltype(BFILENAME ('BACKUP', 'TEST.xml'), NLS_CHARSET_ID ('AL32UTF8'))
as "custt"
COLUMNS CustomerName  VARCHAR2(50)    PATH '/deNormalizedCust/CustomerData/CustomerName',
        CustomerDOB   VARCHAR2(50)    PATH '/deNormalizedCust/CustomerData/CustomerDOB',
        CustomerEmail VARCHAR2(50)    PATH '/deNormalizedCust/CustomerData/CustomerEmail',
        PoductType    VARCHAR2(50)    PATH '/deNormalizedCust/CustomerProduct/PoductType',
        ProductNumber VARCHAR2(50)    PATH '/deNormalizedCust/CustomerProduct/ProductNumber');

这是一个sqlfiddle演示

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