SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function JSONExtract (children 1)
     ExpressionList (children 3)
      Literal \'{"obj" : {"a" : 42, "b" : "Hello", "c" : [1,2,3]}}\'
      Literal \'obj\'
      Literal \'Map(String, Variant(UInt32, String, Array(UInt32)))\'
