[CX] A few functions are undefined

Query issued:

SELECT ISSTR(name) as type_output FROM default_shadow;

Result:

"msg": "function null.ISSTR@1 is undefined "

 SELECT TOSTR(join_mo) month FROM default_shadow;

"msg": "function null.TOSTR@1 is undefined "

SELECT tonum("12.12") - tonum("0.12") as num;

	"msg": "function null.tonum@1 is undefined "

SELECT tobool("true") as boo;

function null.tobool@1 is undefined "

 select now_str() as now;

	"msg": "function null.now_str@0 is undefined "

 SELECT TYPENAME(name) as type_output FROM default_shadow;

	"msg": "function null.TYPENAME@1 is undefined "

select date_part_str(now_str(), "hour") as hour, date_part_str(now_str(),"minute") as minute, date_part_str(now_str(),"second") 

	"msg": "function null.date_part_str@2 is undefined "

select now_millis() as now;

   	"msg": "function null.now_millis@0 is undefined "

select str_to_millis('2016-09-29') as now;

    	"msg": "function null.str_to_millis@1 is undefined "

select millis_to_str(str_to_millis('2010-01-01')) as date;

	"msg": "function null.millis_to_str@1 is undefined "