Basic System DMS PROC › SELECT Command › DSCL SELECT CRITERIA Field Name Descriptions › MODDT — Last modification date (date format)

MODDT — Last modification date (date format)

Comparison dates can be entered in any acceptable CA Disk format. For non-VSAM data set processing and reporting on VSAM components with "SCAN REALVOLS, REPORT COMPONENTS", the value of MODDT is set to the location indicated by CA Disk system parameter DSCBLMOD in the Format-1 DSCB for each data set or component. For more details, see the system parameter description for DSCBLMODnnnk in the Systems Guide. Missing or invalid values are assigned a value of 00/00/0000 or 0.

For all other processing of VSAM clusters, the value of MODDT is set to the last modified date in field AMDSTSP in the catalog entry for each cluster. Missing or invalid values are assigned a value of 00/00/0000 or 0.

For example, to select data sets without last modification dates, use:

SELECT CRITERIA=(MODDT,EQ,0)

To select data sets and clusters modified in the last day, use

SELECT CRITERIA=(MODDT,GE,TODAY)

Note: This will NOT select data sets and clusters without last modification dates.

HFS datasets, DB2 and certain other applications bypass normal open processing and therefore do not maintain a last modified date. Thus, these data sets will never be selected by the previous selection criteria.

For improved performance, see F1MODDT—Format-1 DSCB last modified date.

For more information, see Midnight "Rapid Aging" Problems.