Determining when a source statement was changed

 

Each source record contains a date field that is automatically updated by the source entry utility (SEU) if a change is made to the statement. You can use this date field to determine when a statement was last changed.

Most high-level language compilers print these dates on the compiler lists. The Copy File (CPYF) and Copy Source File (CPYSRCF) commands also print these dates.

Each source member description contains two date and time fields. The first date/time field reflects changes to the member any time it is closed after being updated. The second date/time field reflects any changes to the member. This includes all changes caused by SEU, commands (such as CRYF and CPYSRCF), authorization changes, and changes to the file status. For example, the FRCRATIO parameter on the Change Physical File (CHGPF) command changes the member status. This date/time field is used by the Save Changed Objects (SAVCHGOBJ) command to determine if the member should be saved. Both date/time fields can be displayed with the Display File Description (DSPFD) command specifying TYPE(*MBR). There are two changed date/times shown with source members:

• Last source update date/time. This value reflects any change to the source data records in the member. When a source update occurs, the Last change date/time value is also updated, although there might be a 1- or 2-second difference in that date/time value.

• Last change date/time. This value reflects any changes to the member. This includes all changes caused by SEU, commands (such as CPYF and CPYSRCF), authorization changes, or changes to file status. For example, the FRCRATIO parameter on the CHGPF command changes the member status, and therefore, is reflected in the Last change date/time value.

 

Parent topic:

Managing a source file