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Passing list of keys to a sproc to get recordset
Message
 
 
À
25/09/2009 07:43:48
Cetin Basoz
Engineerica Inc.
Izmir, Turquie
Information générale
Forum:
Microsoft SQL Server
Catégorie:
Syntaxe SQL
Versions des environnements
SQL Server:
SQL Server 2008
Application:
Desktop
Divers
Thread ID:
01425870
Message ID:
01426941
Vues:
47
Hi Cetin,

Where is the link to the original code by Jeff Moden? Are you referring to the numbers table idea of splitting the list?

See also http://blogs.lessthandot.com/index.php/DataMgmt/DataDesign/the-ten-most-asked-sql-server-questions--1#3

>>Struggling with t-SQL syntax to get a set of record by passing in a string built in vb .net from a list of primary keys. Need 2 versions - one for integer keys, one for guid / uid keys
>>- I can be flexible about what and how I pass the params
>>I understand t-sql does not actually have arrays so my first instinct is to pass in a string with the guids delimited with ' and separated with a comma and see if the pk is in the "list" of the string.
>>
>>But that won't work with
>>
>>select * from members where cpk in (@pklist)
>>
>>if I leave out the delimeters and have a single string with single quotes surrounding it the above select works but only pulls the first record
>>
>>Integers an even bigger disaster as they a string values and the above code doesn't cast them
>>
>>Plan B would be to build a table from the incoming param string and join against that to get the recordset but the syntax for that is beyond my t-sql skills
>>
>>Have a feeling somebody has the answer to this
>>
>>Guidance appreciated
>>
>>TIA
>
>Jeff Moden's code is the best code I have ever seen about sending and splitting a comma separated list. You can find a modified implementation on:
>
>http://www.foxite.com/archives/sqlexec-with-a-local-cursor-0000192577.htm
>
>It doesn't have 8000 characters limit and it does work with too many items in the list.
>
>An alternative is to use Linq:
>
>List<int> cpk = new List<int> {1,3,5,6,....};
>cpk.Add(...);
>
>var members = from m in db.Members
>                      where cpk.Contains( m.memberId )
>                      select m;
>
It is fast and IDs are sent as parameters. Drawback is that parameters are limited to 2100 (but that shouldn't be a problem if you can use splitting algorithms that use varchar(8000) which even wouldn't let you create 2100 IDs).
>
>If you have SQL 2008, then of course sending a table is a nice solution.
>
>Cetin
If it's not broken, fix it until it is.


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