Determine the changelist used to submit new changes in perforce

Question

A workspace is synced to a particular changelist A . User makes changes in the workspace and submits the changes which shows up as changelist B . Is there a way to figure out A given B ?

Answer 1

Files must be synced to the head revision before they can be modified, so as far as the files in B are considered, A = B-1 .

There is no requirement that all of the files in a workspace be synced to the same changelist, or that they be synced at all, and there is no way to determine given B what revision other files were synced to at the time B was submitted.