You need to transition  between a query builder object and the result set object.

The query builder object and the result set aren’t the object as your code assumes..

I’d rewrite it this way:

  $result = db_select('taxonomy_term_data', 't')
     ->addField('t', 'tid');
     ->condition('t.vid', $vids, 'IN')
     ->condition(db_or()->condition('t.description', "%$keys%", 'LIKE')

     ->condition('t.name', "%$keys%", 'LIKE'))
->execute();

  $found = NULL;
  foreach ($result as $row) {
    $output .= print_r($row, true);
  }

But if you need other conditional logic around this make the last line be:

$result = $result->execute();

---

From: support-bounces@drupal.org [mailto:support-bounces@drupal.org] On Behalf Of Ms. Nancy Wichmann
Sent: Friday, July 06, 2012 1:44 PM
To: support drupal
Subject: [support] What's wrong with this query?

  $result = db_select('taxonomy_term_data', 't');
  $result->addField('t', 'tid');
  $result->condition('t.vid', $vids, 'IN')
    ->condition(db_or()->condition('t.description', "%$keys%", 'LIKE')->condition('t.name', "%$keys%", 'LIKE'))
    ;
  $result->execute();

  $found = NULL;
  foreach ($result as $row) {
    $output .= print_r($row, true);
  }
The Devel query log shows the query properly built. I copied the query from the log into PhpMyAdmin and it gets one row. But my code shows nothing fetched.

Nancy