docs: def getExpInfo(expnum):
      """Return a dictionary of information about a particular exposure"""
  
      col_names=['object',
                 'e.expnum',
                 'mjdate',
                 'uttime',
                 'filter',
                 'elongation',
                 'obs_iq_refccd',
                 'triple', 'qso_status']
  
      sql="SELECT "
      sep=" "
      for col_name in col_names:
          sql=sql+sep+col_name
          sep=","
      sql=sql+" FROM bucket.exposure e "
      sql=sql+" JOIN bucket.circumstance c ON e.expnum=c.expnum "
      sql=sql+" LEFT JOIN triple_members t ON e.expnum=t.expnum "
      sql=sql+" WHERE e.expnum=%d " % ( expnum ) 
      #sys.stderr.write(sql);
      cfeps.execute(sql)
      rows=cfeps.fetchall()
      #print rows
      result={}
      #import datetime
      for idx in range(len(rows[0])):
          result[col_names[idx]]=rows[0][idx]
      
      return(result)