Richard Hipp wrote:
It seems like every check-in information page has a "parent" link.
But I can't find any "children" links. What am I missing? When
reviewing the changes to a project, how to you move forward in time?
Internally, Git stores only the child->parent relation, but not the
parent->child relation. To retrieve the immediate children of a revision
requires an O(history size) operation. While this cost can be largely
eliminated by caching (I know because I've done it), it is an operation
that is not entirely trivial to support efficiently and therefore many
tools don't do it.
My understanding is that the raison d'être for this design is that it
essentially turns Git's on-disk representation into a purely functional
key value store (that's not entirely true, but close enough). This makes
it much easier to recover from interrupts (such as the user hitting
Ctrl-C, a power or network outage) without needing a fully transactional
database backend.
Reimer Behrends
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