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Baffling Delete Problem
Message
De
19/08/1997 13:05:54
Matt Mc Donnell
Mc Donnell Software Consulting
Boston, Massachusetts, États-Unis
 
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Divers
Thread ID:
00045076
Message ID:
00045591
Vues:
34
>>Hi all,
>>
>>Today I deleted 25,000 records from a 30,000 record table, and packed it. A SQL (40 records) which had been taking <1 sec. now took 15 sec.
>>:-(((
>>So, I:
>>
>>a. reindexed. Still slow
>>
>>b. re-packed Still slow
>>
>>c. checked every clause in the SQL and matched them with indexes. Still slow
>>
>>d. Restored the original. Speed was fine. :-))
>>
>>e. Deleted, speed was fine. :-)
>>
>>f. Packed - slow again :-((
>>
>>g. Copied data (5K records) to a temp file, ZAPped and appended.
>>
>>Speed is now terrific - almost too fast to see. :-)
>>
>>Question: Why did this happen?
>>
>>TIA
>>Barbara
>
>Try and delete the index, then re-create it again.
>
>Dave

Deleting and recreating the index is like , as my wife would say, taking a water pill at that time of the month....gets rid of the bloat.
Matt McDonnell
...building a better mousetrap with moldy cheese...
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