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Query executes too long
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To
07/07/2001 08:48:30
General information
Forum:
Visual FoxPro
Category:
Databases,Tables, Views, Indexing and SQL syntax
Miscellaneous
Thread ID:
00527693
Message ID:
00527792
Views:
44
Sorry, Craig. All I got, is: "Oops" :)

Why it could not be fully optimized? What if I remove join to lender table?

>You will never fully optimize this query. See the article on Rushmore on my web site.
>
>
>>Hi everybody,
>>
>>I have a query, which executes too long (though I executed it through PCAnywhere, but it should not be a factor here):
>>
>>
SELECT oJC.CurState as State, CMRView.*, Date, Mortgage, Source, ;
>>ParentCode as Lender, extrWeek, extrYear ;
>>FROM TranMstr inner join Lookups!Lender on TranMstr.Lender=Lender.Code ;
>>Inner Join SiteMstr on TranMstr.PropID=SiteMstr.PropID ;
>>Inner Join CMRView on SiteMstr.town=CMRView.town ;
>> where (between(date,ctod('01/01/2001'),ctod('06/30/2001')) ) and between(Mortgage,1,1000000000)  INTO TABLE \redp\work\CMR\CMR_0FE18SEWQ
>>
>>Here is sys(3054) result:
>>
>>
>>Using index tag Date to rushmore optimize table tranmstr
>>Using index tag Mortgage to rushmore optimize table tranmstr
>>Using index tag Deleted to rushmore optimize table tranmstr
>>Rushmore optimization level for table tranmstr: full
>>Using index tag Deleted to rushmore optimize table lender
>>Rushmore optimization level for table lender: full
>>Using index tag Deleted to rushmore optimize table sitemstr
>>Rushmore optimization level for table sitemstr: full
>>Rushmore optimization level for intermediate result: none
>>Joining table tranmstr and table sitemstr using index tag Propid
>>Joining intermediate result and intermediate result using temp index
>>Joining table lender and intermediate result using temp index
>>Selected 13446 records in 368.26 seconds
>>        275
>>        375
>>        475
>>        575
>>        675
>>        775
>>        875
>>        975
>>
>>BTW, what do the numbers (275, 375, etc.) show here?
>>
>>Do you have suggestions to optimize it (don't suggest to drop deleted tags :))?
>>
>>Thanks a lot in advance.
If it's not broken, fix it until it is.


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