SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 5)
    Literal \'r1\'
    Identifier id
    Identifier val
    Function count (children 1)
     ExpressionList
    Function uniqExact (children 1)
     ExpressionList (children 1)
      Identifier unique_value
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier replicated_deduplicate_by_columns_r1
   ExpressionList (children 2)
    Identifier id
    Identifier val
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier id
    OrderByElement (children 1)
     Identifier val
