Reading complete log data (IFCID 0306)

Several benefits are associated with use of IFCID 0306 to read log data.

About this task

Begin program-specific programming interface information.The benefits of using IFCID 0306 are:

  • IFCID 0306 can request Db2 to decompress log records if compressed, before passing them to the return area of your IFI program.
  • Start of changeIn a data sharing environment, Db2 merges log records if the value of the IFI READS qualification WQALFLTR is X'00'. If WQALFLTR is X'03', log records are not merged.End of change
  • IFCID can retrieve log records from the archive data sets.
  • Complete log records are always returned.

Procedure

To use IFCID 0306:

Issue an IFI READS call. 
CALL DSNWLI(READS,ifca,return_area,ifcid_area,qual_area)
IFCID 0306 must appear in the IFCID area. IFCID 0306 returns complete log records. Multi-segmented control interval log records are combined for a complete log record.

Generally, catalog and directory objects cannot be in group buffer pool RECOVER-pending (GRECP) status when an IFCID 0306 request accesses the compression dictionary. Only log entries for tables that are defined with DATA CAPTURE CHANGES enabled are decompressed.

End program-specific programming interface information.