feat: support segment-scoped scalar index scans - #79
Open
zhangstar333 wants to merge 5 commits into
Open
Conversation
zhangstar333
force-pushed
the
lance_scalar_index_segment
branch
from
September 8, 2026 14:53
19326e9 to
bca783e
Compare
![lance-gatekeeper[bot]](https://avatars.githubusercontent.com/in/4433141?s=60&v=4){kind=small}
This comment was marked as outdated.
This comment was marked as outdated.
Sorry, something went wrong.
lance-gatekeeper
Bot
added
K-changes
This comment was marked as outdated.
This comment was marked as outdated.
Sorry, something went wrong.
lance-gatekeeper
Bot
added
K-approved
zhangstar333
force-pushed
the
lance_scalar_index_segment
branch
from
September 9, 2026 05:05
60cd132 to
221d880
Compare
This comment was marked as outdated.
This comment was marked as outdated.
Sorry, something went wrong.
lance-gatekeeper
Bot
added
the
K-changes
lance-gatekeeper
Bot
removed
the
K-changes
There was a problem hiding this comment.
✅ Gate recommendation: approve.
The two scanner-option blockers are fixed. Segment mode now rejects deleted-row scans before candidate generation, while use_scalar_index=false retains the explicit fragment-domain fallback without index work. The existing exact-candidate and scoped-fallback contracts remain intact.
lance-gatekeeper
Bot
added
the
K-approved
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Add Rust, C, and C++ scanner APIs to select a physical BTree/Bitmap index segment within an explicit fragment scope, avoiding global scalar index evaluation across unrelated segments.
The scanner reapplies the complete filter before LIMIT/OFFSET and falls back to a non-indexed scan of the same fragment scope when the selected segment cannot safely serve the query. This
initial implementation supports ordinary scans only.