--- !ruby/object:RI::MethodDescription 
aliases: []

block_params: 
comment: 
- !ruby/struct:SM::Flow::P 
  body: Requests cancellation of the command currently being processed.
- !ruby/struct:SM::Flow::P 
  body: Returns <tt>nil</tt> on success, or a string containing the error message if a failure occurs.
full_name: PGconn#cancel
is_singleton: false
name: cancel
params: |
  conn.cancel() -> String

visibility: public
