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GetHistorical
def GetHistorical (self, oid, serial): ob = {sql} if not ob.data and ob.dataserial: actual = GetHistorical (oid, ob.dataserial) ob.data = actual.data return ob SQL: SELECT z_oid, z_serial, z_pre, z_status, z_data, z_datalen, z_version, z_nv, z_dataserial FROM zodb_data WHERE z_oid = ? AND z_serial = ?