SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function toDate (alias date_value) (children 1)
     ExpressionList (children 1)
      Literal \'2020-12-12\'
   ExpressionList (children 2)
    Function last_day (children 1)
     ExpressionList (children 1)
      Identifier date_value
    Function LAST_DAY (children 1)
     ExpressionList (children 1)
      Identifier date_value
