SQL Server WHERE clause XPath with multiple nodes and conditions - sql-server

Question

I have this XML in a table column in SQL Server:
<root>
<Request>
<RequestData>
<VendorLeadList>
<VendorLeadItem>
<CampaignOfferTypeID>REN</CampaignOfferTypeID>
<LeadDispositionID>Lead</LeadDispositionID>
<Jurisdiction>NY</Jurisdiction>
<FirstName>Shikasta</FirstName>
<LastName>Kashti</LastName>
<MessageId>1347_1483825159115_c8273</MessageId>
</VendorLeadItem>
</VendorLeadList>
</RequestData>
<DualMessageID/>
<AzureBlobFile/>
<AzureBlobImageList/>
</Request>
</root>
I want to query all the records where it matches some nodes with specific values. For example I want all records where LeadDispositionID=Lead and Jurisdiction=NY and CampaignOfferTypeID=REN and a MessageId element exists (doesn't matter what value.)
I tried this but it doesn't work (no errors but the conditions doesn't match and it returns other records):
SELECT TOP 10 *
FROM [Messages]
WHERE PayLoadXml.exist('//LeadDispositionID[.="Lead"] and //CampaignOfferTypeID[.="REN"] and //Jurisdiction[.="NY"] and //MessageId') = 1
ORDER BY ID DESC
Any idea as to what I'm doing wrong?

Answer 1

You cannot combine nodes within .exist() simply with and. Your own example would work like this:
SELECT TOP 10 *
FROM #Messages
WHERE PayLoadXml.exist('//VendorLeadItem[LeadDispositionID[.="Lead"] and CampaignOfferTypeID[.="REN"] and Jurisdiction[.="NY"] and MessageId/text()]') = 1
Try it like this:
First a declared table to mock-up your Messages table. Insert 3 cases:
DECLARE #messages TABLE(SomeDescription VARCHAR(100),PayLoadXml XML);
INSERT INTO #messages VALUES
('Your example'
,'<root>
<Request>
<RequestData>
<VendorLeadList>
<VendorLeadItem>
<CampaignOfferTypeID>REN</CampaignOfferTypeID>
<LeadDispositionID>Lead</LeadDispositionID>
<Jurisdiction>NY</Jurisdiction>
<FirstName>Shikasta</FirstName>
<LastName>Kashti</LastName>
<MessageId>1347_1483825159115_c8273</MessageId>
</VendorLeadItem>
</VendorLeadList>
</RequestData>
<DualMessageID/>
<AzureBlobFile/>
<AzureBlobImageList/>
</Request>
</root>'
)
,('LeadDispositionID=Slave'
,'<root>
<Request>
<RequestData>
<VendorLeadList>
<VendorLeadItem>
<CampaignOfferTypeID>REN</CampaignOfferTypeID>
<LeadDispositionID>Slave</LeadDispositionID>
<Jurisdiction>NY</Jurisdiction>
<FirstName>Bruno</FirstName>
<LastName>Kashti</LastName>
<MessageId>1347_1483825159115_c8273</MessageId>
</VendorLeadItem>
</VendorLeadList>
</RequestData>
<DualMessageID/>
<AzureBlobFile/>
<AzureBlobImageList/>
</Request>
</root>'
)
,('LeadDispositionID=Lead but No MessageId'
,'<root>
<Request>
<RequestData>
<VendorLeadList>
<VendorLeadItem>
<CampaignOfferTypeID>REN</CampaignOfferTypeID>
<LeadDispositionID>Lead</LeadDispositionID>
<Jurisdiction>NY</Jurisdiction>
<FirstName>Bruno</FirstName>
<LastName>Kashti</LastName>
<MessageId></MessageId>
</VendorLeadItem>
</VendorLeadList>
</RequestData>
<DualMessageID/>
<AzureBlobFile/>
<AzureBlobImageList/>
</Request>
</root>'
);
This is the query:
The CROSS APPLY will ensure, that only nodes with a MessageId are taken into account. The WHERE will apply an additional filter
SELECT m.*
FROM #messages AS m
CROSS APPLY m.PayLoadXml.nodes(N'/root/Request/RequestData/VendorLeadList/VendorLeadItem[not(empty(MessageId/text()))]') AS A(itm)
WHERE itm.exist(N'LeadDispositionID[text()="Lead"]')=1
If you need to check more than one condition you might use this:
WHERE itm.exist(N'.[LeadDispositionID="Slave" and FirstName="Bruno"]')=1