---
layout: article
title: MPE_MAXKEYVALUES
description: The MPE_MAXKEYVALUES table stores the current maximum surrogate / retained key value for each keyed table in Data Controller for SAS®.
---

# MPE_MAXKEYVALUES

The `MPE_MAXKEYVALUES` table stores the current maximum surrogate / retained key value for each table configured with a retained key (see [RK_UNDERLYING](/dcc-tables/#rk_underlying)). It is used to generate new key values during loads.

## Columns

 - 🔑 `KEYTABLE char(41)`: Base table in `libref.dataset` format
 - `KEYCOLUMN char(32)`: The surrogate / retained key field containing the key values
 - `MAX_KEY num`: Integer value representing the current max RK or SK value in the KEYTABLE
 - `PROCESSED_DTTM num`: Datetime this value was last updated