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VIEW taxes network more than underlying SQL SELECT
Message
 
 
À
05/03/2008 12:09:48
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Versions des environnements
Visual FoxPro:
VFP 9 SP2
OS:
Windows XP SP2
Network:
Windows 2000 Server
Database:
Visual FoxPro
Divers
Thread ID:
01298989
Message ID:
01298999
Vues:
14
You can use ODBC trace or/and SQL Server profiler to see what is sent to SQL Server in each case.

>
>I am monitering the network traffic when I open a view versus when I execute the underlying SQL. I find that the SQL SELECT taxes the network < 5% while opening the view records under 50%. I get the SQL statement from GENDBC so I am confident that's the view's code. The SELECT statement for the view is:
>SELECT ManifestHdr.dManifest, ManifestHdr.lOpen, ManifestHdr.iQty,;
>       COUNT(ManifestDtl.iPk) AS nScanned, ManifestHdr.iPk,
>             Manifesthdr.iFkSystems;
>	FROM  SN!ManifestHdr;
>		LEFT OUTER JOIN SN!ManifestGrp;
>        	ON  ManifestGrp.iFkManHdr = ManifestHdr.iPk;
>     	LEFT OUTER JOIN SN!ManifestDtl;
>        	ON  ManifestDtl.iFkManGrp = ManifestGrp.iPk;
>   	WHERE ManifestHdr.iFkSystems = ?vp_ManifestHdr_iFkSystems;
>	GROUP BY ManifestHdr.iPk;
>        ORDER BY ManifestHdr.dManifest
>Any ideas why this is?
--sb--
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