Github user mebelousov commented on the issue:
    @zjffdu @felixcheung 
    Every day our users run about 1000 queries in the Greenplum (open source 
Postgres-based DB).
    There is great need for binding the query to the user and/or to the note.
    The precode `set application_name=#{noteId};` allows quickly find the note.
    This precode must be set by Zeppelin administrator, business users will not 
write any precode in each note for each jdbc-interpreter.
    I believe the precode in JDBC interpreter is necessary feature for 
entreprise users.


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