SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayAUCPR (children 1)
     ExpressionList (children 2)
      Literal Array_[\'a\', \'b\', \'c\', \'d\']
      Literal Array_[UInt64_1, UInt64_0, UInt64_1, UInt64_1]