SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier xxxx_null
   Function greater (children 1)
    ExpressionList (children 2)
     Identifier ts
     Literal \'2021-10-11 00:00:00\'
