Creating a query from XML input parameter in SQL Server stored procedure and verifying output

问题

I have created a stored procedure that reads XML data as its input. I am having two issues that I am hoping someone can help with.

Issue 1: When I execute the stored procedure, I only get back the first value for AccountType (9). I am expecting/wanting to get back all values for AccountType.

Issue 2: Once I have fixed the above issue I would like to use values from AccountType to select users from another table e.g. dbo.UserData

What I have tried:

I saw this on another SO post that you can debug but I am not sure exactly how to use this or what it's doing-

select col.query('.') as Debug

XML:

<root>
    <From>4</From>
    <AccountType>9</AccountType>
    <AccountType>5</AccountType>
    <AccountType>6</AccountType>
    <AccountType>7</AccountType>
    <AccountType>5</AccountType>
    <AccountType>4</AccountType>
    <AccountType>1</AccountType>
    <AccountType>15</AccountType>
    <AccountType>16</AccountType>
    <AccountType>1</AccountType>
    <AccountType>ivs</AccountType>
    <AccountType>10</AccountType>
    <AccountType>12</AccountType>
    <AccountType>11</AccountType>
    <AccountType>tfs</AccountType>
    <AccountType>vsa</AccountType>
    <AccountType>13</AccountType>
    <AccountType>14</AccountType>
    <GroupID>1</GroupID>
    <GroupID>5</GroupID>
</root>

Stored procedure:

CREATE PROCEDURE dbo.UserSelect
    @XMLInput XML
AS
BEGIN
    SET NOCOUNT ON;

    SELECT DISTINCT
        'AccountType' = x.v('AccountType[1]', 'nvarchar(2)')
    FROM  
        @XMLInput.nodes('/root') AS x(v)
END

Execution of stored procedure:

DECLARE @XML as XML

SET @XML = '<root>
    <From>4</From>
    <AccountType>9</AccountType>
    <AccountType>5</AccountType>
    <AccountType>6</AccountType>
    <AccountType>7</AccountType>
    <AccountType>5</AccountType>
    <AccountType>4</AccountType>
    <AccountType>1</AccountType>
    <AccountType>15</AccountType>
    <AccountType>16</AccountType>
    <AccountType>1</AccountType>
    <AccountType>ivs</AccountType>
    <AccountType>10</AccountType>
    <AccountType>12</AccountType>
    <AccountType>11</AccountType>
    <AccountType>tfs</AccountType>
    <AccountType>vsa</AccountType>
    <AccountType>13</AccountType>
    <AccountType>14</AccountType>
    <GroupID>1</GroupID>
    <GroupID>5</GroupID>
</root>'

EXEC dbo.UserSelect @XML

回答1:

You were close, but you needed to specify the 'AccountType' node in the nodes function. And then use the value function to get the value.

select distinct x.v.[value]('.','nvarchar(2)') AccountType
from @XML.nodes('/root/AccountType') x(v)

In an ITVF (Inline Table Valued Function) it looks like:

create function dbo.GetAccountTypeFromXML
(
  @Xml xml
)
returns table
return
  select distinct x.v.[value]('.','nvarchar(2)') AccountType
  from @XML.nodes('/root/AccountType') x(v)

Which can then be used as, for example:

select *
from dbo.UserData
where AccountType in (select AccountType from dbo.GetAccountTypeFromXML(@Xml))

来源：https://stackoverflow.com/questions/56369698/creating-a-query-from-xml-input-parameter-in-sql-server-stored-procedure-and-ver

标签

sql

sql-server

xml

stored-procedures