SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Function arrayUnion (alias num_example) (children 1)
     ExpressionList (children 4)
      Literal Array_[Int64_-2, UInt64_1]
      Literal Array_[UInt64_10, UInt64_1]
      Literal Array_[Int64_-2]
      Function array (children 1)
       ExpressionList
    Function arrayUnion (alias str_example) (children 1)
     ExpressionList (children 3)
      Literal Array_[\'hi\']
      Function array (children 1)
       ExpressionList
      Literal Array_[\'hello\', \'hi\']
    Function arrayUnion (alias null_example) (children 1)
     ExpressionList (children 2)
      Literal Array_[UInt64_1, UInt64_3, NULL]
      Literal Array_[UInt64_2, UInt64_3, NULL]