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

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