'Returns hex converted field string'

def hexConvertField(self, field):

    rootQuery = queries[Backend.getIdentifiedDbms()]
    hexField = field
    if ('hex' in rootQuery):
        hexField = (rootQuery.hex.query % field)
    else:
        warnMsg = ("switch    '--hex'    is    currently    not    supported    on    DBMS    %s" % Backend.getIdentifiedDbms())
        singleTimeWarnMessage(warnMsg)
    return hexField
