gistfile1.txt

postgres=# select jsonx_build_object('{"o": {"foo":"bar", "apa":"tuta", "phone":["1",2]}}');
                                                                                       jsonx_build_object
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 <json:object xsi:schemaLocation="http://www.datapower.com/schemas/json jsonx.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:json="http://www.ibm.com/xmlns/prod/2009/jsonx">+
 <json:object name="o">                                                                                                                                                                        +
   <json:string name="foo">bar</json:string>                                                                                                                                                   +
   <json:string name="apa">tuta</json:string>                                                                                                                                                  +
   <json:array name="phone">                                                                                                                                                                   +
     <json:string>1</json:string>                                                                                                                                                              +
     <json:number>2</json:number>                                                                                                                                                              +
   </json:array>                                                                                                                                                                               +
 </json:object>                                                                                                                                                                                +
 </json:object>
(1 row)

postgres=# select xmlexists('//*[@name]' PASSING jsonx_build_object('{"o": {"foo":"bar", "apa":"tuta", "phone":["1",2]}}'));
 xmlexists
-----------
 t
(1 row)