MB Software Solutions General Account wrote:
> VFP9SP2 - WinXP - dbfs on network
>
> I have to query 2 tables to populate a lookup list:
>
> SELECT x1.provnum ;
> FROM (ADDBS(this.cDataPath)+this.cClaimsTable) x1 ;
> UNION ;
> SELECT x2.provnum ;
> FROM (ADDBS(this.cDataPath)+this.cDischargeTable) x2 ;
> INTO CURSOR curTemp
>
> This query is taking forever (4 minutes!). There's no WHERE clause so
> it's not optimizable. But is there a better way?
>
> My current plan now is to create logic that extracts the provnums into a
> separate table and just query that. That makes complete sense to me.
> (These tables are basically input files from a vendor, with the provnum
> built in and not sent in a separate lookup table.)
>
> Other ideas?
>
>
If all you are doing is checking if the provnum is valid you could just
seek into both tables (assuming it is indexed). Should be quick enough.
* assume open with above aliases and order set.
if seek(mytestvalue,'X1') or seek(mytestvalue,'X2')
* value is ok
else
* value not ok
endif
Peter
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