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How to detect corrupted indexes
Message
From
21/08/2002 07:33:26
Hilmar Zonneveld
Independent Consultant
Cochabamba, Bolivia
 
General information
Forum:
Visual FoxPro
Category:
Coding, syntax & commands
Miscellaneous
Thread ID:
00691754
Message ID:
00691839
Views:
7
>How can i detect the a particular table has corrupted index. Simly using the table does'nt fire the error numbers below.
>
>INLIST(tnerrornumber,19,114)
>
>what command will initiate vfp to return the error numbers above

These errors appear when the index no longer matches the table - this would mainly happen when your table structure changes, without having the index open. I believe this can only happen with temporary indices (IDX), or when you overwrite one of the two files (DBF vs. CDX).

A corrupted index is not so easy to detect. One thing you can do is reindex regularly, whether you detect corruption or not. Another option is write a program that sets a specific index and then loops through all the records. If you have SET DELETED OFF, and the index is not filtered, the loop should go through reccount() records. Watch out - if there really is corruption, this might become an endless loop.

Hilmar.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)
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