How can I check whether cck field's content is changed in node_update hook? I want to check whether cck field's content is changed in node_update 

I tried the same with following conditions but it gave me incorrect result.

if($node-&gt;field_event_type['und'][0]['value'] == $node-&gt;original-&gt;field_event_type['und'][0]['value']){
   echo "same";
}else{
   echo "changed"
}


Thanks.
From documentation:


  Note that when this hook is invoked, the changes have not yet been written to the database


So you can use

$old_node = node_load($node-&gt;nid);


Then simply compare $node provided to a hook with $old_node obtained from database.