OpenEuphoria

Re: EDB error

• Posted by Rubens Monteiro Luciano <rml at rubis.trix.net> Oct 29, 2003
• 559 views

Robert, Matt and all;

         After using db_compress() I could access the wrong record which 
shows key: -9  record: -10  and then delete it using EDB Browser. Problem 
solved. The edb file is ok now. But what could have caused this? And why 
these values -9 and -10 ? Could it be a memory fault or HD error ? Or even 
a crash in the system ? Other possibillities?


Thanks for the help !!


Rubens

At 13:45 28/10/2003, you wrote:
>
>Rubens Monteiro Luciano wrote:
>>> > I'm getting this error in my EDB file when I try to delete a
>>> > register.
>>> >
>>> > ( if db_record_key(i) = -9 then  db_delete_record(i) end if )
>>> >
>>> > I suspect that my edb file is corrupted.
>>> > I can open it in the excellent Matt Lewis EDB Browser, and see that
>>> > the last register entered is key:  -9  and register: -10.
>>> > This values are impossible to exist in my program, so I believe
>>> > this could be a crash in the computer or media.
>>
>>...
>>Fatal Database Error: bad record number
>
>I wonder if you have some code like:
>
>    for i = 1 to db_table_size() do
>       if db_record_key(i) = -9 then
>           db_delete_record(i)
>       end if
>    end for
>
>When you delete one of the records, the size of the
>table changes, and all the subsequent records are renumbered.
>db_table_size() is only evaluated once, at the start of the loop.
>By the time you get to the end, you are short one record
>(i is too big), so EDS says "bad record number".
>Maybe you should try a while loop:
>
>     i = 1
>     while i <= db_table_size() do
>         ...
>         i += 1
>     end while
>
>I haven't had any reports of mysteriously
>corrupted .edb files, but I once had my own .edb file
>get corrupted when I built it on Windows and uploaded
>it to FreeBSD using FTP. I accidentally uploaded it in "text"
>or ASCII mode, rather than binary mode. This
>changes the line terminator characters. i.e. \r\n is changed
>to \n. (i.e. anywhere in the .edb file where you have the
>two bytes: 13 10, they will be changed to one byte: 10).
>When I uploaded it again in binary mode it was fine.
>
>Regards,
>    Rob Craig
>    Rapid Deployment Software
>    http://www.RapidEuphoria.com
>
>
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