SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier fill
   ExpressionList (children 2)
    OrderByElement (children 3)
     Identifier date
     Function toDate (children 1)
      ExpressionList (children 1)
       Literal \'2019-05-01\'
     Function toDate (children 1)
      ExpressionList (children 1)
       Literal \'2019-05-31\'
    OrderByElement (children 1)
     Identifier val
