Allow logging in Debug level the SQL queries of all log archivers (#11812)

* Debug log archiver queries

* comment out

core/DataAccess/LogAggregator.php

@@ -10,10 +10,12 @@ namespace Piwik\DataAccess;
 
 use Piwik\ArchiveProcessor\Parameters;
 use Piwik\Common;
+use Piwik\Container\StaticContainer;
 use Piwik\DataArray;
 use Piwik\Db;
 use Piwik\Metrics;
 use Piwik\Tracker\GoalManager;
+use Psr\Log\LoggerInterface;
 
 /**
  * Contains methods that calculate metrics by aggregating log data (visits, actions, conversions,
@@ -140,17 +142,24 @@ class LogAggregator
      */
     private $queryOriginHint = '';
 
+    /**
+     * @var LoggerInterface
+     */
+    private $logger;
+
+
     /**
      * Constructor.
      *
      * @param \Piwik\ArchiveProcessor\Parameters $params
      */
-    public function __construct(Parameters $params)
+    public function __construct(Parameters $params, LoggerInterface $logger = null)
     {
         $this->dateStart = $params->getDateStart();
         $this->dateEnd = $params->getDateEnd();
         $this->segment = $params->getSegment();
         $this->sites = $params->getIdSites();
+        $this->logger = $logger ?: StaticContainer::get('Psr\Log\LoggerInterface');
     }
 
     public function setQueryOriginHint($nameOfOrigiin)
@@ -169,6 +178,9 @@ class LogAggregator
             $query['sql'] = 'SELECT /* ' . $this->queryOriginHint . ' */' . substr($query['sql'], strlen($select));
         }
 
+	// Uncomment to log on DEBUG level all archiving queries
+        // $this->logger->debug($query['sql']);
+
         return $query;
     }