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Any way to speed this up?
Message
From
30/10/2007 13:38:56
 
General information
Forum:
Visual FoxPro
Category:
Databases,Tables, Views, Indexing and SQL syntax
Miscellaneous
Thread ID:
01265099
Message ID:
01265105
Views:
10
>This is part of an application originally written in vfp5; it runs slower in vfp9.
>Any idea on how to speed it up? (All fields involved in joins, where clauses, etc. have indexes...)
>
>SELECT VAL(Customer.code) AS valcode, Invhead.*, Ordhead.location,;
>  Ordhead.entered, Ordhead.priorityorder, Ordhead.customerpo,;
>  Ordhead.daterequired, Ordhead.comm1, Ordhead.comm2, Ordhead.comm3,;
>  Ordhead.terms, Customer.name, Customer.code, Customer.creditlmt,;
>  Customer.einnumber, Customer.specialdisc, Customer.dollarsuse,;
>  Ordhead.customerid, Customer.country AS custcountry,;
>  Prodqty.totordered, Prodqty.totallocated, Prodqty.totshipped, .F. AS ok,;
>  Rdytoship.rdytoship, Shipped.shipped, Prodqty.specialord,;
>  ALLTRIM(STR(Ordhead.orderid))+IIF(Ordhead.sbo,"B"," ") AS dispordno,;
>  Customer.onhold;
> FROM ;
>     frantisi!invhead ;
>    INNER JOIN frantisi!ordhead ;
>   ON  Invhead.orderid = Ordhead.orderid ;
>    INNER JOIN frantisi!shipped ;
>   ON  Ordhead.orderid = Shipped.orderid ;
>    INNER JOIN frantisi!rdytoship ;
>   ON  Invhead.invoiceno = Rdytoship.invoiceno ;
>    INNER JOIN frantisi!customer ;
>   ON  Customer.customerid = Ordhead.customerid ;
>    INNER JOIN frantisi!prodqty ;
>   ON  Ordhead.orderid = Prodqty.orderid;
> WHERE ( ( (  EMPTY(?ldDateReqd) ;
>   OR  Ordhead.daterequired <= ( ?ldDateReqd ) );
>   OR  NOT (EMPTY(Invhead.picked) ) );
>   AND  (  ( ?lnLocation ) = ( 0 );
>   OR  Ordhead.location = ( ?lnLocation ) ) );
>   AND  EMPTY(dispatchdate) ;
> ORDER BY 1, Ordhead.priorityorder DESC, Invhead.invoiceno ;
>into cursor dispatch
>
Make sure the codepage for the tables involved is the same as the codepage when you open the view. (CPDBF() = CPCURRENT())

Use SYS(3054) to see how VFP is handling this query.

Tamar
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