docs: def getExpnums(pointing,night=None):
      """Get all exposures of specified pointing ID.
  
      Default is to return a list of all exposure numbers"""
  
      if night:
          night=" floor(e.mjdate-0.0833)=%d " % ( night ) 
      else:	
          night=''
      
      sql="SELECT e.expnum "
      sql=sql+"FROM bucket.exposure e "
      sql=sql+"JOIN bucket.association a on e.expnum=a.expnum "
      sql=sql+"WHERE a.pointing="+str(pointing)+" AND "+night
      sql=sql+" ORDER BY mjdate, uttime DESC "
      cfeps.execute(sql)
  
      return(cfeps.fetchall())