SQL Clone
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


query xml


query xml

Author
Message
sam-433147
sam-433147
SSC-Enthusiastic
SSC-Enthusiastic (123 reputation)SSC-Enthusiastic (123 reputation)SSC-Enthusiastic (123 reputation)SSC-Enthusiastic (123 reputation)SSC-Enthusiastic (123 reputation)SSC-Enthusiastic (123 reputation)SSC-Enthusiastic (123 reputation)SSC-Enthusiastic (123 reputation)

Group: General Forum Members
Points: 123 Visits: 153
i have a large xml file
one of my queries looks like:
SELECT
p.value('(PodactID)[1]', 'nvarchar(max)'),
q.value('(CustomerID)[1]', 'nvarchar(max)'),
r.value('(IsPaid)[1]', 'int'),
r.value('(Payment)[1]', 'real'),
r.value('(PaymentDate)[1]', 'nvarchar(max)')
FROM XmlTable CROSS APPLY XML_DATA.nodes('Customers/Customer/Podact/PodactBills/PodactsBill') t(p)
CROSS APPLY p.nodes('Payments/PaymentDetails[CustomerID]') a(q)
CROSS APPLY r.nodes('PaymentsDetails[IsPaid]') b(r)

how can i improve the query duration, because it takes lot of time?

thanks
Eugene Elutin
Eugene Elutin
SSCarpal Tunnel
SSCarpal Tunnel (5K reputation)SSCarpal Tunnel (5K reputation)SSCarpal Tunnel (5K reputation)SSCarpal Tunnel (5K reputation)SSCarpal Tunnel (5K reputation)SSCarpal Tunnel (5K reputation)SSCarpal Tunnel (5K reputation)SSCarpal Tunnel (5K reputation)

Group: General Forum Members
Points: 4974 Visits: 5478
Process large xml in chunks.

_____________________________________________
"The only true wisdom is in knowing you know nothing"
"O skol'ko nam otkrytiy chudnyh prevnosit microsofta duh!":-D
(So many miracle inventions provided by MS to us...)

How to post your question to get the best and quick help
sam-433147
sam-433147
SSC-Enthusiastic
SSC-Enthusiastic (123 reputation)SSC-Enthusiastic (123 reputation)SSC-Enthusiastic (123 reputation)SSC-Enthusiastic (123 reputation)SSC-Enthusiastic (123 reputation)SSC-Enthusiastic (123 reputation)SSC-Enthusiastic (123 reputation)SSC-Enthusiastic (123 reputation)

Group: General Forum Members
Points: 123 Visits: 153
any idea how to divide the xml to chunks?
mister.magoo
mister.magoo
SSCarpal Tunnel
SSCarpal Tunnel (4.1K reputation)SSCarpal Tunnel (4.1K reputation)SSCarpal Tunnel (4.1K reputation)SSCarpal Tunnel (4.1K reputation)SSCarpal Tunnel (4.1K reputation)SSCarpal Tunnel (4.1K reputation)SSCarpal Tunnel (4.1K reputation)SSCarpal Tunnel (4.1K reputation)

Group: General Forum Members
Points: 4112 Visits: 7865
Do you really need your PodactID, CustomerID and PaymentDate to be nvarchar(MAX) data types? I doubt it - use the correct data type for these.

When you query an element value, do it like this : '(mynode/text())[1]', not this '(mynode)[1]'

What is going on with those cross apply clauses ? r.nodes is invalid here as the only "r" declared is the result of the r.nodes clause!!

How many rows are in your table? How big is each XML_DATA value? Do you have suitable indexes and a WHERE clause?

MM


select geometry::STGeomFromWKB(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




  • Forum Etiquette: How to post Reporting Services problems
  • Forum Etiquette: How to post data/code on a forum to get the best help - by Jeff Moden
  • How to Post Performance Problems - by Gail Shaw

  • Go


    Permissions

    You can't post new topics.
    You can't post topic replies.
    You can't post new polls.
    You can't post replies to polls.
    You can't edit your own topics.
    You can't delete your own topics.
    You can't edit other topics.
    You can't delete other topics.
    You can't edit your own posts.
    You can't edit other posts.
    You can't delete your own posts.
    You can't delete other posts.
    You can't post events.
    You can't edit your own events.
    You can't edit other events.
    You can't delete your own events.
    You can't delete other events.
    You can't send private messages.
    You can't send emails.
    You can read topics.
    You can't vote in polls.
    You can't upload attachments.
    You can download attachments.
    You can't post HTML code.
    You can't edit HTML code.
    You can't post IFCode.
    You can't post JavaScript.
    You can post emoticons.
    You can't post or upload images.

    Select a forum

































































































































































    SQLServerCentral


    Search