Fix- Add index to accelerate query - refs #8200

app/Migrations/Schema/V110/Version20151221150100.php

@@ -16,9 +16,6 @@ class Version20151221150100 extends AbstractMigrationChamilo
      */
     public function up(Schema $schema)
     {
-        $this->addSql(" 
-            ALTER TABLE c_quiz_answer ADD INDEX idx_quiz_qid (question_id)");
-
         $this->addSql("
             UPDATE track_e_attempt a
             INNER JOIN c_quiz_answer qa

app/Migrations/Schema/V110/Version20160707131900.php

@@ -0,0 +1,29 @@
+<?php
+/* For licensing terms, see /license.txt */
+
+namespace Application\Migrations\Schema\V110;
+
+use Application\Migrations\AbstractMigrationChamilo;
+use Doctrine\DBAL\Schema\Schema;
+
+/**
+ * Fix c_quiz_answer's correct field for id_auto
+ */
+class Version20160707131900 extends AbstractMigrationChamilo
+{
+    /**
+     * @param Schema $schema
+     */
+    public function up(Schema $schema)
+    {
+        $this->addSql(" 
+            ALTER TABLE c_quiz_answer ADD INDEX idx_cqa_q (question_id)");
+    }
+
+    /**
+     * @param Schema $schema
+     */
+    public function down(Schema $schema)
+    {
+    }
+}

src/Chamilo/CourseBundle/Entity/CQuizAnswer.php

@@ -11,7 +11,8 @@ use Doctrine\ORM\Mapping as ORM;
  * @ORM\Table(
  *  name="c_quiz_answer",
  *  indexes={
- *      @ORM\Index(name="c_id", columns={"c_id"})
+ *      @ORM\Index(name="c_id", columns={"c_id"}),
+ *      @ORM\Index(name="idx_cqa_q", columns={"question_id"})
  *  }
  * )
  * @ORM\Entity