Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
How to implement FetchAsNeeded
Message
 
À
28/07/2003 22:51:05
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00814414
Message ID:
00814626
Vues:
11
Sounds ok to me...

>Hi all,
>
>Is this the correct implementation of FetchAsNeeded? See comments.
>
>dbsetprop("cConnName","connection","asynchronous",.t.)
>cursorsetprop("FetchSize", 50, 0)
>cursorsetprop("MaxRecords", 50, 0)
>cursorsetprop("FetchAsNeeded", .t., 0)
>* assume this query takes 10+ seconds to run, I want to display
>* the grid at once with the first 50 rows and 'fetch' the remaining data
>* in the background.
>nLocID = 12345
>cSQL1 = "select "+;
>           "a.itemid,b.locname,a.yearweek,c.skustat, d.itemname, e.supplier "+;
>        "from "+;
>           "dailysales a, locs b, sku c,items d, suppliers e "+;
>        "where "+;
>          "a.locid=b.locid "+;
>          "and a.itemid=c.itemid and a.locid=c.locid "+;
>          "and a.itemid=d.itemid "+;
>          "and d.suppid=e.suppid "+;
>          "and a.locid=?nLocID "
>create sql view (cViewName1) remote connection (cConnName) shared as &cSQL1
>use (cViewName1) in 0 alias (cViewAlias1)
>* will VFP continue processing the following lines of code
>* even before all the records in cViewName1 are "fetched".
>* this is just a view that will be a "child" of the current record of the above view.
>create sql view (cViewName2) remote connection (cConnName) shared as &cSQL2
>use (cViewName2) in 0 alias (cViewAlias2) nodata && note: nodata keyword
>
>
>These queries are for the purpose of explaining my question. Assume that the queries
>will work.
- Jayesh
Précédent
Suivant
Répondre
Fil
Voir

Click here to load this message in the networking platform