keepInCache control for QueryCachePolicy

Author: alshabalin

src/Session.php

@@ -65,6 +65,11 @@ class Session
      */
     protected $is_alive = false;
 
+    /**
+     * @var bool
+     */
+    protected $keep_query_in_cache = false;
+
     /**
      * @param Table $table
      * @param string $session_id
@@ -295,6 +300,17 @@ public function rollBack()
         return $this->rollbackTransaction();
     }
 
+    /**
+     * Set whether to keep query in cache.
+     *
+     * @return $this
+     */
+    public function keepInCache($value = true)
+    {
+        $this->keep_query_in_cache = (bool)$value;
+        return $this;
+    }
+
     /**
      * @param string $yql
      * @param array|null $parameters
@@ -326,7 +342,9 @@ public function query($yql, array $parameters = null)
             // 'commit_tx' => true,
         ]);
 
-        $query_cache_policy = new QueryCachePolicy;
+        $query_cache_policy = new QueryCachePolicy([
+            'keep_in_cache' => $this->keep_query_in_cache,
+        ]);
 
         $data = [
             'session_id' => $this->session_id,