[Koha] Identifying the user who catalogued a biblio

Hello all, I'm trying to fing out whether koha logs the user who catalogued an item or issued it out. i've tried to check the database and i founf that some tables have the timestamp field. does anybody know what sql query i can execute that will tell me who catalogued or issued out an item in koha? i am familiar with phpmyadmin and can run the query from phpmyadmin. thanks in advance for your responses Olugbenga Adara MCP Consultant, 3OM Services, 75, Lebanon Street, Dugbe, Ibadan, Nigeria. Mobile: 234-803-3220288 __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com