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Databases,Tables, Views, Indexing and SQL syntax
Rob,
I *think* I have good news on the SQL/FPT issue...
Using VFP7 SP1 I did a number of Select-SQLs, always to the same records in a 500K records table with every second record having FPT content.
Between Select-SQL runs I ran a program to add data to each of the Memo fields in the subject table. After doing this 3 times, I ran a PACK MEMO and then ran the Select-SQL one more time.
The output table size (both DBF and FPT) was identical for the run prior to the PACK MEMO and the one after.
By the way, I had started with a .FPT of 160,000,512 and after the last run to add to the memo fields its size was 944,000,512. After the PACK MEMO the FPT size was down to 304,000,512.
So I think that problem has been resolved. Do you agree?
cheers
>>
>>That was WELL WORTH the length of wind it took you. Thanks for sharing that - I have never heard of it either and I do think it is very significant.
>>
>>My testing showed some oddity in the processing of FPTs, but this takes it to a whole new level. I'm now thinking seriously of a Wish List item to have more efficient processing and better documentation regarding memo fields and FPT files.
>>
>>cheers
>>
>Hi Jim:
>
>Thanx for the kind words, and agreement with me that it could be significant... I tried to get this published in FPA or FT at the time, but they weren't interested, and never even responded...
>
>Hasn't been a common problem, but it sure threw me for a loop when I first encountered it.
>
>Rob
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