Xquery鑄造迄今不返回行

Question

我有一個表在Oracle XDB中有一行稱爲測試。

SQL> select * from test; 

SYS_NC_ROWINFO$ 
--------------------------- 
<Employee xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation=""> 
    <location> 
    <joiningDate id="onsite"> 
     <hireDate>2012-06-18</hireDate> 
    </joiningDate> 
    <joiningDate id="offshore"> 
     <hireDate>2011-07-8</hireDate> 
    </joiningDate> 
    </location> 
</Employee> 

消逝：00：00：00.00

我也有喜歡

CREATE INDEX test_xml_index ON test (OBJECT_VALUE) 
    INDEXTYPE IS XDB.XMLIndex PARAMETERS ('PATH TABLE test_dates_tab'); 

BEGIN 
    DBMS_XMLINDEX.registerParameter(
    'myprop', 
    'ADD_GROUP GROUP test_dates 
     XMLTable test_dates_tab ''/Employee'' 
     XMLNAMESPACES (''http://www.w3.org/2001/XMLSchema-instance'' AS "xsi")      
     COLUMNS onsite  date PATH ''.//*[@id="onsite"]/hireDate/text()''    
     '); 
END; 
/

爲什麼我的查詢沒有返回空值的指數？

SQL> select x.* 
    2   from test t, 
    3    xmltable(
    4    xmlnamespaces(
    5     'http://www.w3.org/2001/XMLSchema-instance' as "xsi" 
    6    ), 
    7    'for $d in /Employee/location 
    8       where $d/joiningDate[@id="onsite"]/hireDate/text() = xs:date("2012-06-18") 
    9     return $d' 
10    passing t.object_value 
11     columns 
12     hiredate date path 'hireDate' 
13   ) as x 
14 
SQL>/

HIREDATE 
-------------------- 

在您的幫助延

select x.* 
     from test t, 
      xmltable(
      xmlnamespaces(
       'http://www.w3.org/2001/XMLSchema-instance' as "xsi" 
      ), 
      'for $d in /Employee/location 
         where $d/joiningDate[@id="onsite"]/hireDate/text() = xs:date("2012-06-18") 
       return $d' 
      passing t.object_value 
       columns 
       hiredate date path 'joiningDate[@id="onsite"]/hireDate' 
      ) as x 

Answer 1

有一個在你的XQuery一個錯字明白了：這個元素被命名爲<hireDate/>，但你的軸步說hiredate。