[CX] query with expression.* in where clause not expressible in current CBAS

n1ql query:
SELECT tasks_points FROM default_shadow WHERE tasks_points.* LIKE '_1%';

When I executed above query with analytics I get:
"msg": "Syntax error: In line 1 >>SELECT tasks_points FROM default_shadow WHERE tasks_points.* LIKE '_1%';<< Encountered '' \"\" at column 60. "