SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function JSON_EXISTS (children 1)
     ExpressionList (children 2)
      Literal \'{"a":[[{"b":1}, {"g":1}],[{"h":1},{"y":1}]]}\'
      Literal \'$.a[*][0].h\'