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Data Bases > Xbase Fox > Re: VFP 9: Filt...
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Re: VFP 9: Filters Implemented with SQL

by Gene Wirchenko <genew@[EMAIL PROTECTED] > Jan 15, 2008 at 06:22 PM

"Stefan Wuebbe" <stefan.wuebbe@[EMAIL PROTECTED]
> wrote:

>"Gene Wirchenko" <genew@[EMAIL PROTECTED]
> schrieb im Newsbeitrag 
>news:7d03o35qfe3vt9sjlb4obdtm82qrscgn80@[EMAIL PROTECTED]
><...>
>>>Then I'd have a look at all involved tables and their CDX files.
>>
>>     They seem to be fine though I really do not know what to do to
>> check them.  I opened the table and listed it with each of the tags in
>> effect.  I saw nothing odd.
>
>I'd probably try to (backup the real table files and) create a new
>test.DBF (and CDX) from scratch, adding only a few lines of test
>content first and later the entire content step by step.
>Beyond that, I'd try a DBF Repair tool like Abri "Recover" or "FoxFix".

     There is no problem with any other program.  I do not believe
that the table is corrupt.

>>     Sometimes, the code works, and sometimes, it does not.  One point
>> that I have not mentioned previously.  When the code fails, it fails
>> at the beginning of the browse.  First, the browse grid appears, then
>> the contents do.  I usually get some of the contents, then boom!  I do
>> not recall a case where the browse has blown up after it has completed
>> its initial display.
>
>So you've got a quite complex Browse statement but do not use the
>"Last" clause (because Set Resource is Off), right?
>Can you track down the error to some data dependencies, e.g.
>suspicious content like say filter results containing .Null. values or
not
>or Length() of certain content exceeding some limits like the 120/240
>difference depending on Set Collate?

     No problems of that sort.  All columns are not null.  It is a
straight browse of a table.

>>     I have not been able to figure out a pattern.  In following your
>> suggestions, I finally did get an error indicating a statement in the
>> browse function method.  (Previously, they have been for the browse
>> statement.)  It turned out to be the SQL-select.  That did not help.
>
>Do you use Cast() for all calculated columns to avoid truncation of
>fields in subsequent rows depending on the first line found by the SQL
>engine?

     Not applicable.  I am browsing the table columns directly.

>>     I think that I have some sort of Heisenbug here.  For example, I
>> tried set coverage, and it changed the behaviour of the program!
>
>Hu! <s>

     As I noted elsewhere, opening the table exclusive appears to have
stopped the problem though I do not know why.

Sincerely,

Gene Wirchenko

Computerese Irregular Verb Conjugation:
     I have preferences.
     You have biases.
     He/She has prejudices.
 




 6 Posts in Topic:
VFP 9: Filters Implemented with SQL
Gene Wirchenko <genew@  2008-01-03 17:45:59 
Re: VFP 9: Filters Implemented with SQL
Gene Wirchenko <genew@  2008-01-05 23:30:39 
Re: VFP 9: Filters Implemented with SQL
"Stefan Wuebbe"  2008-01-06 13:24:46 
Re: VFP 9: Filters Implemented with SQL
Gene Wirchenko <genew@  2008-01-06 17:56:44 
Re: VFP 9: Filters Implemented with SQL
"Stefan Wuebbe"  2008-01-15 10:35:07 
Re: VFP 9: Filters Implemented with SQL
Gene Wirchenko <genew@  2008-01-15 18:22:04 

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tan12V112 Wed Aug 20 8:10:42 CDT 2008.