请告诉我如何从该 XML 中提取 guid 字段？问题是 xmlns 参数的存在。目前返回空。
with XML_text(col) as
(
select
'<?xml version="1.0" encoding="UTF-8"?>
<purchasePlan
xmlns:ns2="http://zakupki.gov.ru/223fz/purchasePlan/1"
xmlns="http://zakupki.gov.ru/223fz/types/1"
xmlns:ns10="http://zakupki.gov.ru/223fz/decisionSuspension/1"
xmlns:ns11="http://zakupki.gov.ru/223fz/disagreementProtocol/1"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="https://zakupki.gov.ru/223/integration/schema/TFF-13.1 https://zakupki.gov.ru/223/integration/schema/TFF-13.1/purchasePlan.xsd">
<body>
<item>
<guid>096c4bf6-d656-4441-9032-0b7c45423af1</guid>
</item>
</body>
</purchasePlan>'::xml
)
SELECT r.guid
FROM XML_text as x,
XMLTABLE('purchasePlan/body/item' passing x.col
COLUMNS guid varchar(50) path './guid'
) as r
;
结果必须是“096c4bf6-d656-4441-9032-0b7c45423af1”。
请尝试以下解决方案。
您的 XML 有一个默认名称空间。它需要通过
xmlnamespaces(...)SQL
with XML_text(col) as
(
select
'<?xml version="1.0" encoding="UTF-8"?>
<purchasePlan xmlns:ns2="http://zakupki.gov.ru/223fz/purchasePlan/1"
xmlns="http://zakupki.gov.ru/223fz/types/1"
xmlns:ns10="http://zakupki.gov.ru/223fz/decisionSuspension/1"
xmlns:ns11="http://zakupki.gov.ru/223fz/disagreementProtocol/1"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="https://zakupki.gov.ru/223/integration/schema/TFF-13.1 https://zakupki.gov.ru/223/integration/schema/TFF-13.1/purchasePlan.xsd">
<body>
<item>
<guid>096c4bf6-d656-4441-9032-0b7c45423af1</guid>
</item>
</body>
</purchasePlan>'::xml
)
SELECT r.guid
FROM XML_text as x,
XMLTABLE(xmlnamespaces('http://zakupki.gov.ru/223fz/types/1' AS "ns1"),
'/ns1:purchasePlan/ns1:body/ns1:item' passing x.col
COLUMNS guid varchar(50) path 'ns1:guid'
) as r
;