Cluster drop old Partitions - example

Author: isublimity

README.md

@@ -476,6 +476,72 @@ file_put_contents($fileName,\ClickHouseDB\FormatLine::TSV($row)."\n",FILE_APPEND
 
 ```
 
+### Cluster drop old Partitions
+
+Example code :
+ 
+```php
+class my
+{
+    /**
+     * @return \ClickHouseDB\Cluster
+     */
+    public function getClickHouseCluster()
+    {
+            return $this->_cluster;
+    }
+    public function msg($text)
+    {
+            echo $text."\n";
+    }
+    private function cleanTable($dbt)
+        {
+    
+        $sizes=$this->getClickHouseCluster()->getSizeTable($dbt);
+        $this->msg("Clean table : $dbt,size = ".$this->humanFileSize($sizes));
+
+        // split string "DB.TABLE"
+        list($db,$table)=explode('.',$dbt);
+
+        // Get Master node for table
+        $nodes=$this->getClickHouseCluster()->getMasterNodeForTable($dbt);
+        foreach ($nodes as $node)
+        {
+            $client=$this->getClickHouseCluster()->client($node);
+            
+            $size=$client->database($db)->tableSize($table);
+            
+            $this->msg("$node \t {$size['size']} \t {$size['min_date']} \t {$size['max_date']}");
+            
+            $client->dropOldPartitions($table,30,30);
+        }
+
+
+    }
+    public function clean()
+    {
+        $this->msg("clean");
+
+        $this->getClickHouseCluster()->setScanTimeOut(2.5); // 2500 ms
+        $this->getClickHouseCluster()->setSoftCheck(true);
+        if (!$this->getClickHouseCluster()->isReplicasIsOk())
+        {
+            throw new Exception('Replica state is bad , error='.$this->getClickHouseCluster()->getError());
+        }
+        
+        
+        $this->cleanTable('model.history_full_model_sharded');
+        
+        
+        $this->cleanTable('model.history_model_result_sharded');
+
+
+    }    
+}
+
+```
+
+
 ### Debug & Verbose
 
 ```php