SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 3)
    Identifier p.key
    Identifier p.ts
    Identifier e.value
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier probes (alias p)
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier events (alias e)
     TableJoin (children 1)
      Function and (children 1)
       ExpressionList (children 2)
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier p.key
          Identifier e.key
        Function greaterOrEquals (children 1)
         ExpressionList (children 2)
          Identifier p.ts
          Identifier e.begin
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier p.key
    OrderByElement (children 1)
     Identifier p.ts
