Below is a representative XQuery expression, wherein the JSON file is added via db:rename, and that addition is journaled to an XML log file via the write-log-event function.

*I’ve noticed that the update to the xml log is adversely affected as the number of JSON files in the db grows.*

Here’s the XQuery:

declare namespace _="http://com.sap.ariba.metadata.event/log"; declare namespace log="http://com.sap.ariba.metadata.event/log"; declare variable $logFilename external := "2017-01-31.xml"; declare variable $logDirectory external := "log"; declare variable $dbSchema external := "schemaRepo"; declare function _:write-log-event() as empty-sequence() { let $event := <entry id="6669" timestamp="2017-01-31T14:24:49.83-05:00"> <command toPath="meta/services/demo/serviceversions/v1/docs/demo/biggerform.json/1" isBinary="true" dbSchema="schemaRepo" type="ADD_BINARY" ></command></entry> let $logPath := $logDirectory || '/' || $logFilename let $fullPath := $dbSchema || '/' || $logPath return insert node $event as last into doc($fullPath)//log:log }; declare variable $tempFileUri external := "temp/7b04aab6-6ee6-47c7-89e0-e5132e505daf/meta/services/demo/serviceversions/v1/docs/demo/biggerform.json/1"; declare variable $toPath external := "meta/services/demo/serviceversions/v1/docs/demo/biggerform.json/1"; if (not(db:exists($dbSchema, $logDirectory || '/' || $logFilename))) then ( error(QName('http://com.sap.ariba.metadata/err', 'LogFileReq'), "write operation logFile not exist.") ) else ( try{ db:rename( $dbSchema, $tempFileUri, $toPath), _:write-log-event(), db:output("SUCCESSFULLY")

} catch * { fn:string("FAILED" || ": " || $err:description) } )

Thanks,

Joe

On 1/27/17, 6:11 AM, "Christian Grün" christian.gruen@gmail.com wrote:

> In what ways might the number of JSON resources > affect the performance of an XQuery update for a particular XML resource?

What kind of updates are you performing? How do you store your JSON resources?