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I'm trying to use either db_select or db_query with a join in Drupal 7, but not having luck.

The query I'm trying to run is:

SELECT floormap_counter_expected.counter_name, tls_connect_agent_counters.counter_stage,tls_connect_agent_counters.applicant_gwf, tls_connect_agent_counters.counter_ip, floormap_counter_expected.expected FROM tls_connect_agent_counters INNER JOIN floormap_counter_expected ON floormap_counter_expected.counter_name = tls_connect_agent_counters.counter_name;

When passed to mysql via the command line, the information I am wanting is returned without a problem.

when I try db_select:

$get_counter_info = db_select('tls_connect_agent_counters', 't');
      $get_counter_info->fields('t', array('counter_stage', 'applicant_gwf', 'counter_ip'));
      $get_counter_info->fields('n', array('expected'));
      $get_counter_info->join('floormap_counter_expected', 'n', 't.counter_name = n.counter_name');
      $get_counter_info->execute()->fetchAll();

when I try db_query, I do:

$counters_query = "SELECT floormap_counter_expected.counter_name, tls_connect_agent_counters.counter_stage,";
      $counters_query .= "tls_connect_agent_counters.applicant_gwf, tls_connect_agent_counters.counter_ip, ";
      $counters_query .= "floormap_counter_expected.expected FROM tls_connect_agent_counters INNER JOIN ";
      $counters_query .= "floormap_counter_expected ON floormap_counter_expected.counter_name = tls_connect_agent_counters.counter_name";

      $get_counter_info = db_query($counters_query);
      $get_counter_info->fetchAll();

Then, I follow with this:

if (isset($get_counter_info)) {
    foreach ($get_counter_info as $results) {
      echo "Rest";
      $center_counters[$results->counter_name]['stage'] = $results->counter_stage;
      $center_counters[$results->counter_name]['counter_ip'] = $results->counter_ip;
      $i++;
    }
  }
  return $center_counters;

With both db_select and db_query, I get an error saying that $center_counters is not set. I've trying using

try{}catch(Exception $e){echo $e-getMessage()}

with both but nothing is printed. Put in an echo with the catch that isn't printed, so I'm assuming the query is running without error because nothing is "caught". I was thinking maybe I'm just calling the information wrong in my foreach loop, maybe I should be identifying the table name as well when I call the field name? I don't think that is the case as nothing is printed when I try to echo strings out of the foreach.

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$get_counter_info->execute()->fetchAll();

will execute the query...but what are you doing with the results, exactly? At the moment you're discarding them, instead you need to assign them to a variable.

$results = $get_counter_info->execute()->fetchAll();
foreach ($results as $result) {
  ...
}

Or at the very least actually use the return value from the execution:

foreach ($get_counter_info->execute()->fetchAll() as $result) {
  ...
}

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