Ranges or values for selection by keys

Retrieving ranges for key pairs

                       +--------------------------+
                       |CALL  CDVALI (IVECT*,IRC*) |
                       +--------------------------+
                                  

IVECT

Vector returning the minimum and maximum values for the various key pairs since the last call to CDINFO

IRC

Integer return code

0

Normal completion

This routine returns the overlapping validity ranges for the various key pairs since the last call to CDINFO

Setting the historical retrieval time

                  +------------------------------------+
                  |CALL  CDBFOR (TOPN,IDATE,ITIME,IRC*) |
                  +------------------------------------+
                                  

TOPN

Name of the top directory ('*' means all)

IDATE

Date : 6 Decimal integer : YYMMDD

ITIME

Time : 4 Decimal integer : HHMM

IRC

Integer return code

0

Normal completion

Set the maximum insertion time for retrieval of all subsequent data objects for a given top directory Only objects inserted before the specified time will be retrieved, until a further call to CDBFOR is made.