Use extended REST functions like contains in Dynamics CRM
<p>As I noticed, fetching data in Dynamics CRM with REST is a lot faster then with SOAP especially for big data.</p>

<p>Since I'm new to this topic (REST) I want to ask if it's necessary to include any additional library to use functions in my query for instance "contains".</p>

<p>If I send the query:</p>

<pre><code>XrmServiceToolkit.Rest.RetrieveMultiple("ActivityPointerSet", 
"$filter=contains(Subject,'Test')&amp;$top=10", 
function(results){ 
    console.log(results);
}, 
function(error){
    console.log(error);
},
function onComplete(){

}, false);
</code></pre>

<p>I get the error message: Error : 400: Bad Request: Unknown function 'contains' at position 0.</p>

<p>I got more or less intricate queries yet with fetchXML. Is it in most cases possible to alter them to REST?</p>

<p>Best Regards</p>