[basex-talk] Update functions - Error handling and counting

[Bogdan Bogucki]

Hello,

 

I am playing with XQUF in BaseX ann I encountered following problems.

 

1) XQuery is functional language and updating function can return empty
sequence. How can I count and return result how many nodes was inserted or
updated ?

 

Example:

declare %private %updating function cfv:upsertVehicles ($vehicles as
node()*) as empty-sequence() {

 

    let $db := db:open("db")/cars

    for $v in $vehicles

    let $dbVehicle :=  $db/car[vin = $v/vin]

    return if (not(exists($dbVehicle))) then (insert node $v as last into
$db)

             else 

               if (exists($dbVehicle)) then (replace node $dbVehicle with
$v)

               else ()                                          

};

 

I have similar problem with error handling. How can I catch and return any
error.

 

Regards
Bogdan Bogucki