Finished sphinx support

extensions/sphinx/Command.php

@@ -191,7 +191,7 @@ class Command extends \yii\db\Command
      * @param string $index the name of the index from which to take the text processing settings
      * @param string $text the text to break down to keywords.
      * @param boolean $fetchStatistic whether to return document and hit occurrence statistics
-     * @return string the SQL statement for call keywords.
+     * @return static the command object itself
      */
     public function callKeywords($index, $text, $fetchStatistic = false)
     {

extensions/sphinx/Connection.php

@@ -109,7 +109,6 @@ class Connection extends \yii\db\Connection
      */
     public function createCommand($sql = null, $params = [])
     {
-        $this->open();
         $command = new Command([
             'db' => $this,
             'sql' => $sql,

extensions/sphinx/Schema.php

@@ -323,12 +323,11 @@ class Schema extends Object
      */
     public function quoteValue($str)
     {
-        if (!is_string($str)) {
+        if (is_string($str)) {
+            return $this->db->getReadPdo()->quote($str);
+        } else {
             return $str;
         }
-        $this->db->open();
-
-        return $this->db->pdo->quote($str);
     }
 
     /**