XMLTYPE Function - Oracle to PostgreSQL Migration

In Oracle the XMLTYPE function allows you to built XML element from a string. In PostgreSQL you can use the XMLPARSE function.

Oracle:

  -- Single XML element
  SELECT XMLTYPE('<employee>John</employee>') FROM dual;

PostgreSQL:

  -- Single XML element
  SELECT XMLPARSE(CONTENT '<employee>John</employee>');

You can also build a complete XML element as follows:

Oracle:

  -- Complete XML document
  SELECT XMLTYPE('<?xml version="1.0"?><document><employee>John</employee></document>') 
  FROM dual;

PostgreSQL:

  -- Complete XML document
  SELECT XMLPARSE(DOCUMENT '<?xml version="1.0"?><document><employee>John</employee></document>');