Hi Ramzi,
I am not sure whether your are using RestXQ, however if you do, the
implementation should take care of this by itself.
XQuery update in general either applies the whole updating query, or cancels
all updates:
Take the following example db containing 5 documents.
> db:create("mailinglist",
> (1 to 5) ! ,
> (1 to 5) ! ("doc-"|| . ||".xml")
> )
Now if you ran an update:
> for $i in 1 to 5
> let $x := if($i > 4) then error() else ()
> return (
> prof:dump($i, "Inserting "),
> insert node element _ {
>"Hello World"
> } as last into db:open("mailinglist", "doc-"||$i||".xml")
> )
You can see in the GUI / Debug View, that the code for inserting the elements
in the first 4 Documents is executed, and thus the pending update list is
populated in memory.
Once the Query throws the error() the whole query is cancelled and the pending
update list is discarded.
Hence no changes are applied to your databases, if you manage to handle the
whole update in a single transaction.
Feel free to ask for more information!
Best
Michael
> Am 06.07.2020 um 08:38 schrieb Ramzi Hammouda
> :
>
> Hello BaseX team,
> We're developing an application where a command can result in saving data on
> multiple xml documents in the same database. We're using Rest APIs. Now,
> We're looking on handling saving errors. For example, if there were an error
> in saving data on a one document, then the saving of data on other documents
> must be canceled (even if there were successful updates, they must be
> canceled). How can this be implemented?
>
> Thanks.
>
>
> P Respectons ensemble l'environnement. N'imprimez ce message que si
> nécessaire. Let's respect the environment together. Only print this message
> if necessary.
