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   pg_getresult checks to see if any commands
   issued by pg_sendquery have completed.
  
   This will return the same sort of result handle that 
   pg_exec returns.
  
   If there is no query currently being processed or all of the results
   have been obtained, pg_getresult returns
   nothing.
  
The handle of a connection to the database to which asynchronous requests are being issued.