db2 sql json_table and multiple rows

So when I do the below, I get a list of objects as expected...


*-- values json_object(*
*-- key 'test'*
*-- value * (select *json_object*(
*trim*(sys_tname)
*value* *json_object*(
'tableName' *value* *trim*
(sys_tname)
)
)
from qsys2.systables
where sys_dname = 'QGPL');
*-- ); *

But when I remove the comments, because I want the list of objects within
another object, I get the following error...

sqlcode -811
THE RESULT OF AN EMBEDDED SELECT STATEMENT OR A SUBSELECT IN THE SET CLAUSE
OF AN UPDATE STATEMENT IS A TABLE OF MORE THAN ONE ROW, OR THE RESULT
OF A SUBQUERY
OF A BASIC PREDICATE IS MORE THAN ONE VALUE

So what is the correct syntax?

tia
Jay