pg_isbusy
Name
pg_isbusy -- see if a query is busy
Description
   pg_isbusy checks to see if the backend is
   busy handling a query or not.
  
Arguments
- conn
-       The handle of a connection to the database in which the large object
      exists.
      
Return Value
   Returns 1 if the backend is busy, in which case a call to 
   pg_getresult would block, otherwise
   it returns 0.