src/test/regress/expected/gp_xml_1.out

SELECT XMLPARSE(CONTENT '<abc>x</abc>'::text STRIP WHITESPACE) AS "xmlparse";
ERROR:  unsupported XML feature
DETAIL:  This functionality requires the server to be built with libxml support.
HINT:  You need to rebuild PostgreSQL using --with-libxml.
SELECT XMLPARSE(CONTENT '<abc>x</abc>'::text PRESERVE WHITESPACE) AS "xmlparse";
ERROR:  unsupported XML feature
DETAIL:  This functionality requires the server to be built with libxml support.
HINT:  You need to rebuild PostgreSQL using --with-libxml.