jsf - Primefaces only get file to download on click -

i have datatable commandlink in each row, file database.

the code have commandlink is:

<p:commandlink title="download file" styleclass="fa fa-lg fa-download output-button" actionlistener="#{filesearchpagebean.getfiletodownload(result.id)}">     <p:filedownload  value="#{filesearchpagebean.file}"  /> </p:commandlink> 

the function getfiletodownload in page bean makes query file , puts in file variable, in filedownload.

what happening when datatable loaded, makes queries files rows. thing want make query , specific file when link file clicked, doing wrong?

thanks!