[support] Database query cache issue

[Jamie Holly]

You aren't deleting the record from the database, just the file from the 
file system. You should add in there a:

db_query('DELETE FROM {files} WHERE fid = %d', $FID);

Also do that on any other linked tables you have added in.

Jamie Holly
http://www.intoxination.net
http://www.hollyit.net

On 8/26/2012 10:25 AM, Kamal Palei wrote:
> Hi All
> I am using Drupal 6.26.
> I am trying to upload a file. One user can upload only one file.
> After a while, if user wants to upload another file, I need to delete 
> the first file and upload the second file.
> To delete the first file, I do a query to get the first file name, 
> deletes first file and uploads the second file.
> After a while, if user wants to upload another file, when I do query 
> to get the second file name (as I want to delete the second file now), 
> I always get the first file name.
> So I am not able to delete the second file.
> Probably database cache plays a role here, how can I make sure, my 
> query returns the latest data present in table, query should not pick 
> the data from cache.
> Please refer code below.
>  global $user;
>  $FID = -1;
>
>  $result = db_query("SELECT fid, filepath FROM {resubmt_table} LEFT 
> JOIN {files} USING (fid) WHERE resubmt_table.uid = %d", $user->uid);
>  $obj = db_fetch_object($result);
>  if($obj)
>  {
>   $FID = $obj->fid;
>   if($obj->filepath)
>   {
>    if(file_exists($obj->filepath))
>    {
>     drupal_set_message("File exists deleting " . $obj->filepath);
>     unlink($obj->filepath);
>    }
>    else
>    {
>     drupal_set_message("File does not exists, so not able to delete, 
> file = " . $obj->filepath);
>    }
>   }
>  }
>
> Many times, I am not able to delete the file.
> Please suggest how can I fix this issue.
> Thanks
> Kamal
> NECS, Bangalore
>
>

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