mirror of
https://github.com/neondatabase/neon.git
synced 2026-05-15 04:00:38 +00:00
f0ad90f3ee
Problem Different keyspaces may require different floor LSNs in vectored delta layer visits. This patch adds support for such cases. Summary of Changes * Rework layer visit collection. Each layer type has a separate visit type which is aware of the requirements. For delta layers we track the floor LSN of keyspaces and merge only when that's matching. Other layer types do not have this requirement so they merge everything. * Thread the new visit types into the `get_values_reconstruct_data` calls. For delta layers, the code was adapted such that it may merge reads across keyspaces with different LSN floor requirements. * Tweak the fringe update code in `get_vectored_reconstruct_data_timeline` to handle different cont LSNs for different keyspaces. In practice, we will only update the fringe from one keyspace, since this "keyspace split" only happens when an image layer overlaps a delta layer (and image layers always complete all their keys). * Update tests with the new interfaces