SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 4)
    Literal \'Africa/El_Aaiun\'
    Function toDateTime (alias x) (children 1)
     ExpressionList (children 2)
      Literal \'2020-01-02 03:04:05\'
      Literal \'Africa/El_Aaiun\'
    Function toStartOfDay (children 1)
     ExpressionList (children 1)
      Identifier x
    Function toHour (children 1)
     ExpressionList (children 1)
      Identifier x