使用 Xquery 和多个嵌套命名空间查询 Oracle 数据库 XML 数据类型列
Querying Oracle database XML Datatype Column with Xquery and multiple nested namespaces
很抱歉不得不向社区提出这个问题，我已经为这个问题苦苦思索了一个星期，阅读和研究了 Oracle 文档和这些论坛。我能得到的最接近的模型答案是 this
我在数据类型为 XML:
的 oracle colum 中有这个 XML
<TravelReservationRequest xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://schema.atravelcompany.com/TravelReservationTransaction" transactionType="TICKETED" creationDateTime="2015-06-30T21:01:09.0405878Z">
<CWTTravelReservation xmlns="http://schema.atravelcompany.com/TravelReservation">
<Reservation accountNumber="12345678" lastModifiedTimestamp="2015-06-30T21:01:09.0717888Z" recordLocatorNumber="ABCDEFG" supplierService="SUPPLIER" reservationType="Business" InternationalFlag="false" bookingDate="2015-06-30">
<VendorList>
<Vendor vendorCode="AD" vendorClassCode="1" vendorClassification="Air"/>
<Vendor vendorCode="RT" vendorClassCode="3" vendorName="SOME HOTEL SOMEWHERE" vendorClassification="Hotel"/>
</VendorList>
<TravelerList>
<Traveler sequence="1" guid="A:GUID">
<Person birthDate="XXXX-XX-XX">
<Name xmlns="http://schema.atravelcompany.com/V1" namePrefix="MR" firstName="JOHN " lastName="DOE"/>
</Person>
<TravelerAddress type="Alternate" line1="A HOUSE" stateProvince="A PLACE"/>
<Client>
<ClientTop xmlns="http://schema.atravelcompany.com/V1" guid="ANOTHER:GUID"/>
<ClientSub xmlns="http://schema.atravelcompany.com/V1"/>
</Client>
<TravelerEmail emailAddress="email@address.com"/>
<TravelerPhone usage="Mobile"/>
<TravelerType description="SOMETHING"/>
<EmergencyContactList>
<EmergencyContact>
<EmergencyContactPhone/>
<EmergencyContactEmail/>
<UnparsedGDSContent/>
</EmergencyContact>
</EmergencyContactList>
<PassportList>
<Passport xmlns="http://schema.atravelcompany.com/V1" number="XXXXXXXX" issuingCountry="BR"/>
</PassportList>
</Traveler>
</TravelerList>
<SegmentGroupList>
<SegmentGroup lowFareAmount="0">
<SegmentList>
<Segment segmentEndTimestamp="2015-07-01T07:15:00" segmentTravelDurationValue="0117" segmentTypeDescription="Air" segmentBeginTimestamp="2015-07-01T05:58:00" vendorCode="AD" vendorClassCode="1" supplierStatusCode="YK" confirmationNumber="SOMETHING" segmentNumber="1" manualBookingFlag="false">
<SegmentTravelerList>
<SegmentTraveler travelerIdRef="1"/>
</SegmentTravelerList>
<AirSegment aircraftTypeCode="E90" beginAirportCode="VCP" endAirportCode="FLN" classOfServiceCode="V" connectionType="false" eTicketFlag="true" flightNumber="4050" inFlightMealDescription="" travelDistanceValue="320">
<CodeShare/>
</AirSegment>
</Segment>
<Segment segmentEndTimestamp="2015-07-03T12:38:00" segmentTravelDurationValue="0120" segmentTypeDescription="Air" segmentBeginTimestamp="2015-07-03T11:18:00" vendorCode="AD" vendorClassCode="1" supplierStatusCode="YK" confirmationNumber="SOMETHING" segmentNumber="3" manualBookingFlag="false">
<SegmentTravelerList>
<SegmentTraveler travelerIdRef="1"/>
</SegmentTravelerList>
<AirSegment aircraftTypeCode="E90" beginAirportCode="A" endAirportCode="B" classOfServiceCode="G" connectionType="false" eTicketFlag="true" flightNumber="4064" inFlightMealDescription="" travelDistanceValue="320">
<CodeShare/>
</AirSegment>
</Segment>
</SegmentList>
<InvoiceList>
<Invoice ticketNumber="8003674469" travelerRefId="1" exchangeTransactionFlag="false"/>
</InvoiceList>
</SegmentGroup>
<SegmentGroup>
<SegmentList>
<Segment segmentEndTimestamp="2015-07-03T11:18:00" segmentTypeDescription="Hotel" reservedUnitQuantity="1" segmentBeginTimestamp="2015-07-01T07:15:00" vendorCode="RT" vendorClassCode="3" supplierStatusCode="HK" confirmationNumber="000000000" currencyCode="BRL" segmentNumber="2" rateFareAmount="218.70" manualBookingFlag="false">
<HotelSegment cityCode="C" hotelPropertyCode="1234" propertyName="A HOTEL" roomAdultQuantity="1" roomTypeCode="C2T01J">
<HotelAddressList>
<HotelAddress type="Alternate" line1="AN ADDRESS"/>
</HotelAddressList>
<HotelEmailAddress/>
<HotelFaxNumber phoneNumber="1234"/>
<HotelPhoneNumber phoneNumber="1234"/>
</HotelSegment>
</Segment>
</SegmentList>
</SegmentGroup>
</SegmentGroupList>
<ReservationPCCList>
<ReservationPCC pseudoCityCode="CI6C" supplierService="Sabre" pseudoCityType="Booking"/>
</ReservationPCCList>
<BookingAgencyList>
<BookingAgency>
<AgencyPhoneList>
<AgencyPhone phoneNumber="321321321321"/>
</AgencyPhoneList>
</BookingAgency>
</BookingAgencyList>
</Reservation>
</CWTTravelReservation>
</TravelReservationRequest>
我需要能够使用类似于模型答案中的查询之类的东西从这个 XML 中检索值和可能的值列表，但是我可能会尝试我无法让它工作，我需要一些帮助-持有.
我最近的尝试看起来像这样，基于这个例子，但根本不起作用。
select t.*
from
sch_edw_stg.mdf_audit a,
xmltable(xmlnamespaces('http://schema.acompany.com/V1' as "v1"
,'http://schema.acompany.com/TravelReservation' as "resr"
,'http://schema.acompany.com/TravelReservationTransaction' as "trans"
,'http://www.w3.org/2001/XMLSchema' as "xsd"
,'http://www.w3.org/2001/XMLSchema-instance' as "xsi")
,'for $d in resr:/CWTTravelReservation:Value
return $d' passing a.mdf_xml_text columns value varchar2(100) path '/') as t;
而且我已经从这里和其他地方尝试了许多其他排列和示例。我能做的最好的事情是 return 两个空值，我很确定这是因为无法精确识别我需要的相对于 XML.
基数的节点
这是返回一堆空值但至少运行的代码：
SELECT xt.*
FROM sch_edw_stg.mdf_audit x,
XMLTABLE(XMLNAMESPACES ('http://schema.acompany.com/TravelReservationTransaction' AS "e"),'/'
PASSING x.mdf_xml_text
COLUMNS
"VENDORCODE" VARCHAR2(255) PATH 'e:vendorCode',
"VENDORCLASSCODE" VARCHAR2(255) PATH 'e:vendorClassCode',
"VENDORCLASSIFICATION" VARCHAR2(255) PATH 'e:vendorClassification',
"VENDORNAME" VARCHAR2(255) PATH 'e:vendorName'
) xt;
谁能给我一个基于此 XML 的有效 xquery 示例并给我一些关于 为什么 我的尝试失败的指示？
谢谢。
Ed.
您需要给出供应商节点的完整路径，包括在每个级别指定相关的命名空间：
/trans:TravelReservationRequest/resr:CWTTravelReservation/resr:Reservation/resr:VendorList/resr:Vendor
并且您正在访问这些节点的属性，因此您需要使用 @ 语法在 PATH:
中查看它们
select t.*
from mdf_audit a
cross join xmltable(
xmlnamespaces('http://schema.atravelcompany.com/V1' as "v1"
,'http://schema.atravelcompany.com/TravelReservation' as "resr"
,'http://schema.atravelcompany.com/TravelReservationTransaction' as "trans"
,'http://www.w3.org/2001/XMLSchema' as "xsd"
,'http://www.w3.org/2001/XMLSchema-instance' as "xsi")
,'/trans:TravelReservationRequest/resr:CWTTravelReservation/resr:Reservation/resr:VendorList/resr:Vendor'
passing a.mdf_xml_text
columns
"VENDORCODE" VARCHAR2(255) PATH '@vendorCode',
"VENDORCLASSCODE" VARCHAR2(255) PATH '@vendorClassCode',
"VENDORCLASSIFICATION" VARCHAR2(255) PATH '@vendorClassification',
"VENDORNAME" VARCHAR2(255) PATH '@vendorName'
) t;
VENDORCODE VENDORCLAS VENDORCLAS VENDORNAME
---------- ---------- ---------- ------------------------------
AD 1 Air
RT 3 Hotel SOME HOTEL SOMEWHERE
在您最近的尝试中，resr:/CWTTravelReservation:Value 只是格式错误。在 working-but-null 中，您只查看顶级 TravelReservationRequest，它没有名为 vendorCode 等的子节点，因此结果为空。无论如何，您正在寻找具有该路径语法的节点，而不是属性。 （你在 atravelcompany.com 和 acompany.com 之间也有差异，但我怀疑你介绍了形成问题并隐藏真实值）。
很抱歉不得不向社区提出这个问题，我已经为这个问题苦苦思索了一个星期，阅读和研究了 Oracle 文档和这些论坛。我能得到的最接近的模型答案是 this
我在数据类型为 XML:
的 oracle colum 中有这个 XML <TravelReservationRequest xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://schema.atravelcompany.com/TravelReservationTransaction" transactionType="TICKETED" creationDateTime="2015-06-30T21:01:09.0405878Z">
<CWTTravelReservation xmlns="http://schema.atravelcompany.com/TravelReservation">
<Reservation accountNumber="12345678" lastModifiedTimestamp="2015-06-30T21:01:09.0717888Z" recordLocatorNumber="ABCDEFG" supplierService="SUPPLIER" reservationType="Business" InternationalFlag="false" bookingDate="2015-06-30">
<VendorList>
<Vendor vendorCode="AD" vendorClassCode="1" vendorClassification="Air"/>
<Vendor vendorCode="RT" vendorClassCode="3" vendorName="SOME HOTEL SOMEWHERE" vendorClassification="Hotel"/>
</VendorList>
<TravelerList>
<Traveler sequence="1" guid="A:GUID">
<Person birthDate="XXXX-XX-XX">
<Name xmlns="http://schema.atravelcompany.com/V1" namePrefix="MR" firstName="JOHN " lastName="DOE"/>
</Person>
<TravelerAddress type="Alternate" line1="A HOUSE" stateProvince="A PLACE"/>
<Client>
<ClientTop xmlns="http://schema.atravelcompany.com/V1" guid="ANOTHER:GUID"/>
<ClientSub xmlns="http://schema.atravelcompany.com/V1"/>
</Client>
<TravelerEmail emailAddress="email@address.com"/>
<TravelerPhone usage="Mobile"/>
<TravelerType description="SOMETHING"/>
<EmergencyContactList>
<EmergencyContact>
<EmergencyContactPhone/>
<EmergencyContactEmail/>
<UnparsedGDSContent/>
</EmergencyContact>
</EmergencyContactList>
<PassportList>
<Passport xmlns="http://schema.atravelcompany.com/V1" number="XXXXXXXX" issuingCountry="BR"/>
</PassportList>
</Traveler>
</TravelerList>
<SegmentGroupList>
<SegmentGroup lowFareAmount="0">
<SegmentList>
<Segment segmentEndTimestamp="2015-07-01T07:15:00" segmentTravelDurationValue="0117" segmentTypeDescription="Air" segmentBeginTimestamp="2015-07-01T05:58:00" vendorCode="AD" vendorClassCode="1" supplierStatusCode="YK" confirmationNumber="SOMETHING" segmentNumber="1" manualBookingFlag="false">
<SegmentTravelerList>
<SegmentTraveler travelerIdRef="1"/>
</SegmentTravelerList>
<AirSegment aircraftTypeCode="E90" beginAirportCode="VCP" endAirportCode="FLN" classOfServiceCode="V" connectionType="false" eTicketFlag="true" flightNumber="4050" inFlightMealDescription="" travelDistanceValue="320">
<CodeShare/>
</AirSegment>
</Segment>
<Segment segmentEndTimestamp="2015-07-03T12:38:00" segmentTravelDurationValue="0120" segmentTypeDescription="Air" segmentBeginTimestamp="2015-07-03T11:18:00" vendorCode="AD" vendorClassCode="1" supplierStatusCode="YK" confirmationNumber="SOMETHING" segmentNumber="3" manualBookingFlag="false">
<SegmentTravelerList>
<SegmentTraveler travelerIdRef="1"/>
</SegmentTravelerList>
<AirSegment aircraftTypeCode="E90" beginAirportCode="A" endAirportCode="B" classOfServiceCode="G" connectionType="false" eTicketFlag="true" flightNumber="4064" inFlightMealDescription="" travelDistanceValue="320">
<CodeShare/>
</AirSegment>
</Segment>
</SegmentList>
<InvoiceList>
<Invoice ticketNumber="8003674469" travelerRefId="1" exchangeTransactionFlag="false"/>
</InvoiceList>
</SegmentGroup>
<SegmentGroup>
<SegmentList>
<Segment segmentEndTimestamp="2015-07-03T11:18:00" segmentTypeDescription="Hotel" reservedUnitQuantity="1" segmentBeginTimestamp="2015-07-01T07:15:00" vendorCode="RT" vendorClassCode="3" supplierStatusCode="HK" confirmationNumber="000000000" currencyCode="BRL" segmentNumber="2" rateFareAmount="218.70" manualBookingFlag="false">
<HotelSegment cityCode="C" hotelPropertyCode="1234" propertyName="A HOTEL" roomAdultQuantity="1" roomTypeCode="C2T01J">
<HotelAddressList>
<HotelAddress type="Alternate" line1="AN ADDRESS"/>
</HotelAddressList>
<HotelEmailAddress/>
<HotelFaxNumber phoneNumber="1234"/>
<HotelPhoneNumber phoneNumber="1234"/>
</HotelSegment>
</Segment>
</SegmentList>
</SegmentGroup>
</SegmentGroupList>
<ReservationPCCList>
<ReservationPCC pseudoCityCode="CI6C" supplierService="Sabre" pseudoCityType="Booking"/>
</ReservationPCCList>
<BookingAgencyList>
<BookingAgency>
<AgencyPhoneList>
<AgencyPhone phoneNumber="321321321321"/>
</AgencyPhoneList>
</BookingAgency>
</BookingAgencyList>
</Reservation>
</CWTTravelReservation>
</TravelReservationRequest>
我需要能够使用类似于模型答案中的查询之类的东西从这个 XML 中检索值和可能的值列表，但是我可能会尝试我无法让它工作，我需要一些帮助-持有.
我最近的尝试看起来像这样，基于这个例子，但根本不起作用。
select t.*
from
sch_edw_stg.mdf_audit a,
xmltable(xmlnamespaces('http://schema.acompany.com/V1' as "v1"
,'http://schema.acompany.com/TravelReservation' as "resr"
,'http://schema.acompany.com/TravelReservationTransaction' as "trans"
,'http://www.w3.org/2001/XMLSchema' as "xsd"
,'http://www.w3.org/2001/XMLSchema-instance' as "xsi")
,'for $d in resr:/CWTTravelReservation:Value
return $d' passing a.mdf_xml_text columns value varchar2(100) path '/') as t;
而且我已经从这里和其他地方尝试了许多其他排列和示例。我能做的最好的事情是 return 两个空值，我很确定这是因为无法精确识别我需要的相对于 XML.
基数的节点这是返回一堆空值但至少运行的代码：
SELECT xt.*
FROM sch_edw_stg.mdf_audit x,
XMLTABLE(XMLNAMESPACES ('http://schema.acompany.com/TravelReservationTransaction' AS "e"),'/'
PASSING x.mdf_xml_text
COLUMNS
"VENDORCODE" VARCHAR2(255) PATH 'e:vendorCode',
"VENDORCLASSCODE" VARCHAR2(255) PATH 'e:vendorClassCode',
"VENDORCLASSIFICATION" VARCHAR2(255) PATH 'e:vendorClassification',
"VENDORNAME" VARCHAR2(255) PATH 'e:vendorName'
) xt;
谁能给我一个基于此 XML 的有效 xquery 示例并给我一些关于 为什么 我的尝试失败的指示？
谢谢。
Ed.
您需要给出供应商节点的完整路径，包括在每个级别指定相关的命名空间：
/trans:TravelReservationRequest/resr:CWTTravelReservation/resr:Reservation/resr:VendorList/resr:Vendor
并且您正在访问这些节点的属性，因此您需要使用 @ 语法在 PATH:
select t.*
from mdf_audit a
cross join xmltable(
xmlnamespaces('http://schema.atravelcompany.com/V1' as "v1"
,'http://schema.atravelcompany.com/TravelReservation' as "resr"
,'http://schema.atravelcompany.com/TravelReservationTransaction' as "trans"
,'http://www.w3.org/2001/XMLSchema' as "xsd"
,'http://www.w3.org/2001/XMLSchema-instance' as "xsi")
,'/trans:TravelReservationRequest/resr:CWTTravelReservation/resr:Reservation/resr:VendorList/resr:Vendor'
passing a.mdf_xml_text
columns
"VENDORCODE" VARCHAR2(255) PATH '@vendorCode',
"VENDORCLASSCODE" VARCHAR2(255) PATH '@vendorClassCode',
"VENDORCLASSIFICATION" VARCHAR2(255) PATH '@vendorClassification',
"VENDORNAME" VARCHAR2(255) PATH '@vendorName'
) t;
VENDORCODE VENDORCLAS VENDORCLAS VENDORNAME
---------- ---------- ---------- ------------------------------
AD 1 Air
RT 3 Hotel SOME HOTEL SOMEWHERE
在您最近的尝试中，resr:/CWTTravelReservation:Value 只是格式错误。在 working-but-null 中，您只查看顶级 TravelReservationRequest，它没有名为 vendorCode 等的子节点，因此结果为空。无论如何，您正在寻找具有该路径语法的节点，而不是属性。 （你在 atravelcompany.com 和 acompany.com 之间也有差异，但我怀疑你介绍了形成问题并隐藏真实值）。