Explain EXPLAIN PIPELINE (children 1)
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 4)
    ExpressionList (children 2)
     Function toStartOfDay (alias date) (children 1)
      ExpressionList (children 1)
       Identifier dt
     Identifier d
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier t_read_in_order
    ExpressionList (children 2)
     OrderByElement (children 1)
      Identifier date
     OrderByElement (children 1)
      Function round (children 1)
       ExpressionList (children 1)
        Identifier d
    Literal UInt64_5
