SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function JSONExtract (children 1)
     ExpressionList (children 2)
      Literal \'{"a" : {"b" : {"c" : 1, "d" : "str"}}}\'
      Literal \'Tuple( a String, b LowCardinality(String), c LowCardinality(String), d LowCardinality(String))\'
