SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test
   Function less (children 1)
    ExpressionList (children 2)
     Identifier timestamp
     Literal \'2020-10-16\'
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier timestamp
