SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Function toStartOfMinute (alias dt_m) (children 1)
     ExpressionList (children 1)
      Identifier dt
    Function sum (children 1)
     ExpressionList (children 1)
      Identifier cost
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier projection_test
   ExpressionList (children 1)
    Identifier dt_m
