Post JSON using YQL Open Table

jsonpost.xml

<?xml version="1.0" encoding="UTF-8"?>
<table xmlns="http://query.yahooapis.com/v1/schema/table.xsd">
  <meta>
  <author>Johannes Charman</author>
  <description>JSON pages that need post data (this table is based on htmlpost by Christian Heilmann)</description>
  <sampleQuery>select * from {table} where url='http://search.twitter.com/search.json' and postdata="q=test"</sampleQuery>
  <documentationURL></documentationURL>
  </meta>
  <bindings>
    <select itemPath="" produces="XML">
    <urls>
      <url>{url}</url>
    </urls>
    <inputs>
      <key id="url" type="xs:string" required="true" paramType="variable"/>
      <key id="postdata" type="xs:string" required="true" paramType="variable"/>
      
    </inputs>
    <execute>
    <![CDATA[
      var myRequest = y.rest(url);  
      var data = myRequest.accept('application/json').
                 contentType("application/json").
                 post(postdata).response;
     
      response.object = <postresult>{data}</postresult>;
    ]]>
    </execute>
  </select> 
  </bindings>
</table>

Example:

use "https://gist.github.com/Aymkdn/19d7ca69c11a86d1656cd703aad3267d/raw/74d5802b5e6d4bceb4b39fbd120c53311b19623f/jsonpost.xml" as jsonpost;  
select * from jsonpost
   where url='https://web.site.com/api/v5/features/58236?access_token=e9cde433-7651-49a9-01fb0b4eee'
   and postdata="{over:rainbow,item:{description:'hello world'}}"