/**
 * runs a query and returns the result
 *
 * @param string   $query               query to run
 * @param resource $link                mysql link resource
 * @param integer  $options             query options
 * @param bool     $cache_affected_rows whether to cache affected row
 *
 * @return mixed
 */
function PMA_DBI_try_query($query, $link = null, $options = 0, $cache_affected_rows = true)
{
    if (empty($link)) {
        if (isset($GLOBALS['userlink'])) {
            $link = $GLOBALS['userlink'];
        } else {
            return false;
        }
    }
    if ($GLOBALS['cfg']['DBG']['sql']) {
        $time = microtime(true);
    }
    $result = PMA_DBI_real_query($query, $link, $options);
    if ($cache_affected_rows) {
        $GLOBALS['cached_affected_rows'] = PMA_DBI_affected_rows($link, $get_from_cache = false);
    }
    if ($GLOBALS['cfg']['DBG']['sql']) {
        $time = microtime(true) - $time;
        PMA_DBI_DBG_query($query, $link, $result, $time);
    }
    if ($result != false && PMA_Tracker::isActive() == true) {
        PMA_Tracker::handleQuery($query);
    }
    return $result;
}
/**
 * runs a query and returns the result
 *
 * @param string   $query               query to run
 * @param resource $link                mysql link resource
 * @param integer  $options             query options
 * @param bool     $cache_affected_rows whether to cache affected row
 *
 * @return mixed
 */
function PMA_DBI_try_query($query, $link = null, $options = 0, $cache_affected_rows = true)
{
    if (empty($link)) {
        if (isset($GLOBALS['userlink'])) {
            $link = $GLOBALS['userlink'];
        } else {
            return false;
        }
    }
    if ($GLOBALS['cfg']['DBG']['sql']) {
        $time = microtime(true);
    }
    $r = PMA_DBI_real_query($query, $link, $options);
    if ($cache_affected_rows) {
        $GLOBALS['cached_affected_rows'] = PMA_DBI_affected_rows($link, $get_from_cache = false);
    }
    if ($GLOBALS['cfg']['DBG']['sql']) {
        $time = microtime(true) - $time;
        $hash = md5($query);
        if (isset($_SESSION['debug']['queries'][$hash])) {
            $_SESSION['debug']['queries'][$hash]['count']++;
        } else {
            $_SESSION['debug']['queries'][$hash] = array();
            if ($r == false) {
                $_SESSION['debug']['queries'][$hash]['error'] = '<b style="color:red">' . mysqli_error($link) . '</b>';
            }
            $_SESSION['debug']['queries'][$hash]['count'] = 1;
            $_SESSION['debug']['queries'][$hash]['query'] = $query;
            $_SESSION['debug']['queries'][$hash]['time'] = $time;
        }
        $trace = array();
        foreach (debug_backtrace() as $trace_step) {
            $trace[] = PMA_Error::relPath($trace_step['file']) . '#' . $trace_step['line'] . ': ' . (isset($trace_step['class']) ? $trace_step['class'] : '') . (isset($trace_step['type']) ? $trace_step['type'] : '') . (isset($trace_step['function']) ? $trace_step['function'] : '') . '(' . (isset($trace_step['params']) ? implode(', ', $trace_step['params']) : '') . ')';
        }
        $_SESSION['debug']['queries'][$hash]['trace'][] = $trace;
    }
    if ($r != false && PMA_Tracker::isActive() == true) {
        PMA_Tracker::handleQuery($query);
    }
    return $r;
}
 /**
  * Simple test for basic query
  *
  * This relies on dummy driver internals
  *
  * @return void
  */
 function testQuery()
 {
     $this->assertEquals(0, PMA_DBI_real_query('SELECT 1'));
 }