tree 6c5462e3071c1f2cf9a6d552085b3f3b2a41898f
parent a5e8178b385ebfacffd08101529a54f957e78b8f
author Stephen Nusko <nuskos@google.com> 1593692417 +0100
committer Stephen Nusko <nuskos@google.com> 1593692417 +0100

Add the ancestor_slice dynamic table.

This table given a slice ID finds all parents by following the chain of
|parent_id| values.

This is useful to allow queries to quickly find the parent of the given
slice (imagine joining ancestor_slice(id) ON depth = 0).

Bug: 160148605
Change-Id: I4a60b03a2f3fb8d6d2741fcc5b4c2217d70eb3fe