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WHERE Clause order changes in Local View
Message
General information
Forum:
Visual FoxPro
Category:
Databases,Tables, Views, Indexing and SQL syntax
Miscellaneous
Thread ID:
00715210
Message ID:
00715220
Views:
11
You can use the alternative to the View Designer, Steve Sawyer's ViewEditor http://www.geeksandgurus.com/vfptools/vieweditor.htm or ErikMoore 's eView eView File #9474,

>When I createed a local view for access to 2 Visual FoxPro tables (VFP 6.0), I specifically wanted the main key condition to hit first; however, after I saved the view, FoxPro changed the order of the where clause conditions, which causes the prgoram to run longer than it would with a SQL statement with the WHERE clause conditions in the right order, as follows:
>
>SELECT Pocosts.po_main, Pocosts.project_no, Pocosts.cs_desc,;
> Pocosts.cs_date, Pocosts.cs_amount, Apsumfil.paid_date,;
> Apsumfil.invoice_no, Apsumfil.vendor_no;
> FROM po!pocosts, apsumfil;
> WHERE Pocosts.vendor_no = Apsumfil.vendor_no;
> AND Pocosts.invoice_no = Apsumfil.invoice_no;
> AND Pocosts.po_main = ?ThisForm.cPO_Main;
> ORDER BY Apsumfil.invoice_no
>
>I wanted the condition, Pocosts.po_main = ?ThisForm.cPO_Main, to hit first in the WHERE clause.
>
>SELECT Pocosts.po_main, Pocosts.project_no, Pocosts.cs_desc,;
> Pocosts.cs_date, Pocosts.cs_amount, Apsumfil.paid_date,;
> Apsumfil.invoice_no, Apsumfil.vendor_no;
> FROM po!pocosts, apsumfil;
> WHERE ;
>Pocosts.po_main = ?ThisForm.cPO_Main; AND ;
> Pocosts.vendor_no = Apsumfil.vendor_no;
> AND Pocosts.invoice_no = Apsumfil.invoice_no;
> AND
> ORDER BY Apsumfil.invoice_no
>
>When I run the above SQL code, outside of a view, it runs fastr, when it is the way I want it written, but if I leave it the way VFP writes it, it runs slowly.
>
>How do I make VFP leave it the way I pit it in there? Makes me want to go back to writing SQL code instead of using Views!
>
>Cecil
--sb--
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