<?php
 $link = pg_connect("dbname=metadata user=gis password=gispassword host=210.77.68.241");
 $host='ftp2.westgis.ac.cn';
 $sql="select d.uuid,sum(df.filesize) as volume,count(df.id) as fcount,d.path from dataset d left join mdstatus ms on d.uuid=ms.uuid
  left join datafile df on d.id=df.dsid
  where ms.status>4 and d.host='".$host."'  group by d.id,d.uuid,d.path";
 $result = pg_query($link, $sql);
 $numrows = pg_num_rows($result);
 $content='';
 for($ri = 0; $ri < $numrows; $ri++) 
 {
  $row = pg_fetch_array($result, $ri);
  $content.=$row['uuid']."\t";
  $content.=$row['volume']."\t";
  $content.=$row['fcount']."\t";
  $content.=$row['path']."\n";
 }

 $filename='./dataset-0.txt';
 if (!empty($content)) 
  if (!file_put_contents($filename, $content, LOCK_EX))
  {
 	sleep(1);
 	if (!file_put_contents($filename, $content, LOCK_EX))
 	{
   sleep(1);
   			if (!file_put_contents($filename, $content, LOCK_EX))
   				die("error in write dataset-0.txt");
   		}
   	}
	pg_free_result($result);
	pg_close($link);