SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayEnumerateUniqRanked (children 1)
     ExpressionList (children 3)
      Literal UInt64_1
      Literal Array_[\'a\', \'b\', \'c\']
      Literal UInt64_1