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Data Controller for SAS® - Adding Tables


Adding tables to the Data Controller is a matter of configuration, specifically the addition of a new record to the DATACTRL.MPE_TABLES table, and corresponding entries in the DATACTRL.MPE_SECURITY table.


In order to surface the table to users, appropriate groups should be configured as per security settings.


MPE_TABLES Configuration Details

Each table to be edited in the Data Controller is represented by one record in DATACTRL.MPE_TABLES. The fields should be populated as follows:


The libref of the table. If not pre-assigned, DC will assign it at runtime using the first definition found in metadata, using this macro.


The dataset (table) name as visible when assigning a direct libref connection to LIBREF.


This is an integer representing the number of approvals required before a table is updated. This mechanism lets you insist on, for example, 2 or 3 approvals before sensitive data is updated following a submission. Note that only one rejection is ever necessary to remove the submission. This is a required field.


The loadtype determines the nature of the update to be applied. Valid values are as follows:

  • UPDATE. This is the most basic type, and any updates will happen 'in place'. Simply provide the primary key fields in the BUSKEY column.
  • TXTEMPORAL. This signifies an SCD2 type load. For this type the validity fields (valid from, valid to) should be specified in the VAR_TXFROM and VAR_TXTO fields. The table itself should include VAR_TXFROM in the physical key. The remainder of the primary key fields (not including VAR_TXFROM) should be specified in BUSKEY.
  • BITEMPORAL. These tables have two time dimensions - a version history, and a business history. The version history (SCD2) fields should be specified in VAR_TXFROM and VAR_TXTO and the business history fields should be specified in VAR_BUSFROM and VAR_BUSTO. The VAR_TXFROM and VAR_BUSFROM fields should be in the key of the actual table, but should not be also specified in the BUSKEY field.


The support for BITEMPORAL loads is restricted, in the sense it is only possible to load data at a single point in time (no support for loading multiple business date ranges for a single business key). The workaround is simply to load each date range separately.


The business (natural) key of the table. For SCD2 / Bitemporal, this does NOT include the validity dates. For Retained / Surrogate key tables, this contains the actual surrogate key - the underlying fields that are used to create the surrogate key are specified in RK_UNDERLYING. This is a required field.


The SCD2 type validity dates, representing the point in time at which the field was created (VAR_TXFROM) and when it was closed out (VAR_TXTO) from a change or deletion. If the record is active, the VAR_TXTO field would contain a high value. VAR_TXFROM is a part of the physical key of the underlying table. These fields should contain the NAME of the variables which contain the open / close timestamps in the underlying table. Leave blank if not required.


The BITEMPORAL business dates which represent the reporting period to which the record is valid. Typically these contain date values (rather than datetime values). If variables are specified here, then the LOADTYPE should be BITEMPORAL. Leave blank if not required.


Set the name of a variable (eg processed_dttm) which should be given a current timestamp whenever the table is updated. Leave blank if not required.


By default, the Data Controller will only process the records that are part of a changeset. This means that records should be explicity marked for deletion. But what if you are performing a reload of a monthly batch, and the absence of a record implies that it is no longer required? For this scenario, it is necessary to specify the range within a 'complete' load is expected. For instance, by reporting month, or month + product. When performing loads, the DC will then first extract a distinct list of values for this key and close them out in the target table, before performing the upload. The CLOSE_VARS are typically a subset of the BUSKEY fields. Leave blank if not required.


The full path / location (unquoted) of a SAS program (or Viya Job, SAS 9 Stored Process) to execute prior to an edit being made. This allows a particular view of a table to be presented to a user for editing (eg masking columns, removing rows etc). Leave blank if not required.

SAS Developer Notes

The PRE_EDIT_HOOK program will be %inc'd after the data has already been extracted. A table called work.out will be available that has all the same columns (in the same order) as that shown on the EDIT screen on the frontend. The observations will have been sorted on the BUSKEY. The surrounding code looks like this:

pre edit hook SAS code

You can make any changes you wish, just be sure that the final table is also called work.out.


The path / location (unquoted) of a SAS Program that is %include'd after an edit has been made. The program may be:

  • A .sas program on the server directory
  • A SAS 9 Stored Process or Viya Job

This program code can modify the dataset (work.staging_ds) that is created in the staging area, which is useful for augmenting data / applying complex DQ rules. If your DQ check means that the program should not be submitted, then simply exit with syscc > 4 . If you'd like to show a specific message to the user, you can use the following macro:

%mp_abort(iftrue= (&syscc ne 0) /* if this condition is true, the process will exit */

Leave blank if not required.


The full path / location (unquoted) of a SAS program (or Viya Job, SAS 9 Stored Process) that will be %inc'd before an approval diff is generated. This modifies the value that is presented to an approver on the approve screen, and can be helpful in terms of ensuring that information is presented in way that can be easily consumed by approvers. Leave blank if not required.


The full path / location (unquoted) of a SAS program (or Viya Job, SAS 9 Stored Process) that will be %inc'd after an approval is made. This is the most common type of hook script, and is useful for, say, running a SAS job after a mapping table is updated, or running a model after changing a parameter. Leave blank if not required.


Used to determine a range (eg reporting month) to which a 'final version' can be marked. This allows a particular version of data to be marked as final, meaning that the data can continue to change afterwards (reports can simply query for the timestamp of the 'final' version of the data). Leave blank if not required.


The full path / location (unquoted) of a SAS program that will be %inc'd after a 'final version' has been signed off. Leave blank if not required.


Content entered here will be displayed to the approver on signoff. Not required, but recommended.


For retained / surrogate keys, an auto-incrementing field is used to represent each unique record. In this case, the RK (integer) field itself should be added in the BUSKEY column, and the natural / underlying key should be added here. Leave blank unless using retained / surrogate keys.

If more information is available to describe the table being updated (eg on sharepoint), provide a url here and it will be made available to approvers. Leave blank if not required.