Bump version: 0.34.0-beta.4 → 0.34.0-beta.5

fix(python): route sync namespace connections through rust (#3598 )
Summary: - Route built-in sync namespace connections through the Rust namespace connector. - Keep custom namespace clients on the existing Python fallback. - Preserve namespace-backed to_lance compatibility with lazy Python client construction and add regressions.
2026-07-01 10:00:42 +00:00 · 2026-06-30 22:23:43 +00:00 · 2026-06-30 14:46:23 -07:00 · 2026-06-30 11:22:00 -07:00 · 2026-06-30 08:28:41 -07:00 · 2026-06-30 09:27:21 -04:00
48 changed files with 1435 additions and 237 deletions
--- a/.agents/skills/lancedb-branch-ops/SKILL.md
+++ b/.agents/skills/lancedb-branch-ops/SKILL.md
@@ -0,0 +1,137 @@
+---
+name: lancedb-branch-ops
+description: Branch management for LanceDB tables via the REST API. Use this skill whenever someone wants to create, delete, list, or switch branches on a LanceDB table — or needs to make sure a write (metadata update, index build, etc.) lands on a specific branch instead of main. Invoke it even without the word "branch" if context makes clear they want an experimental copy of a table, want to isolate changes, or want to confirm a mutation didn't touch main. Covers: branches/list, branches/create, branches/delete, and passing "branch" in describe/update_field_metadata/create_index to target a non-main version.
+---
+
+## Goal
+
+Manage branches on a LanceDB table: list what exists, create new ones, delete stale ones, and direct read/write operations at a specific branch without touching main.
+
+## Step 0: Establish the connection
+
+Use the `lancedb-connect` skill to resolve the base URL and auth headers (`x-api-key`, `x-lancedb-database`). Skip this only if the connection is already known from the current conversation.
+
+All examples below use `{base_url}` — substitute the resolved endpoint and include the auth headers on every request.
+
+## The branch model (important)
+
+LanceDB branches are named snapshots that diverge from the table's current state at creation time. There is **no checkout command** — you never switch the whole table to a branch. Instead, you **pass `"branch": "<name>"` in the request body** of any operation to target that branch. Omitting the key (or sending an empty body) always targets main.
+
+`branches/list` returns only non-main branches. Main always exists and is not listed.
+
+## List branches
+
+```http
+POST {base_url}/v1/table/{table_id}/branches/list
+Content-Type: application/json
+
+{}
+```
+
+Response:
+```json
+{
+  "branches": {
+    "experiment-reindex": {"parentVersion": 1, "createAt": 1782506085, "manifestSize": 1029}
+  }
+}
+```
+
+If `branches` is `{}`, the table has no branches besides main.
+
+## Create a branch
+
+```http
+POST {base_url}/v1/table/{table_id}/branches/create
+Content-Type: application/json
+
+{"name": "experiment-reindex"}
+```
+
+HTTP 200 with `{}` body = success. The branch is created off the table's current state on main.
+
+Verify by calling `branches/list` and confirming the new name appears.
+
+## Delete a branch
+
+```http
+POST {base_url}/v1/table/{table_id}/branches/delete
+Content-Type: application/json
+
+{"name": "stale-2024"}
+```
+
+HTTP 200 with `{}` body = success. Only the branch pointer is removed — main and all row data remain intact.
+
+Verify by calling `branches/list` (name gone) and `describe` with no branch param (main still responds).
+
+## Operate on a specific branch
+
+Pass `"branch": "<name>"` in the body of any operation to scope it to that branch:
+
+**Read schema on a branch:**
+```http
+POST {base_url}/v1/table/{table_id}/describe
+Content-Type: application/json
+
+{"branch": "wip-branch"}
+```
+
+**Write metadata to a branch (not main):**
+```http
+POST {base_url}/v1/table/{table_id}/update_field_metadata
+Content-Type: application/json
+
+{
+  "branch": "wip-branch",
+  "updates": [
+    {
+      "path": "category",
+      "metadata": {"lancedb:description": "Product category label."},
+      "replace": false
+    }
+  ]
+}
+```
+
+**Build an index on a branch:**
+```http
+POST {base_url}/v1/table/{table_id}/create_index
+Content-Type: application/json
+
+{
+  "branch": "wip-branch",
+  "column": "category",
+  "index_type": "BTREE"
+}
+```
+
+## Verifying isolation
+
+After writing to a branch, always confirm the change did NOT land on main:
+
+```bash
+# Should show the new metadata
+curl -s -X POST {base_url}/v1/table/{table_id}/describe \
+  -H "x-api-key: <key>" -H "x-lancedb-database: <db>" \
+  -H "content-type: application/json" \
+  -d '{"branch": "wip-branch"}'
+
+# Should NOT show the new metadata
+curl -s -X POST {base_url}/v1/table/{table_id}/describe \
+  -H "x-api-key: <key>" -H "x-lancedb-database: <db>" \
+  -H "content-type: application/json" \
+  -d '{}'
+```
+
+## Quick reference
+
+| Goal | Endpoint | Body |
+|------|----------|------|
+| List all branches | `branches/list` | `{}` |
+| Create a branch | `branches/create` | `{"name": "..."}` |
+| Delete a branch | `branches/delete` | `{"name": "..."}` |
+| Read schema on branch | `describe` | `{"branch": "..."}` |
+| Write metadata on branch | `update_field_metadata` | `{"branch": "...", "updates": [...]}` |
+| Build index on branch | `create_index` | `{"branch": "...", "column": ..., "index_type": ...}` |
+| Target main (default) | any endpoint | omit `"branch"` key |
--- a/.bumpversion.toml
+++ b/.bumpversion.toml
@@ -1,5 +1,5 @@
 [tool.bumpversion]
-current_version = "0.31.0-beta.3"
+current_version = "0.31.0-beta.4"
 parse = """(?x)
    (?P<major>0|[1-9]\\d*)\\.
    (?P<minor>0|[1-9]\\d*)\\.
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -157,9 +157,9 @@ dependencies = [

 [[package]]
 name = "anyhow"
-version = "1.0.102"
+version = "1.0.103"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f202df86484c868dbad7eaa557ef785d5c66295e41b460ef922eca0723b842c"
+checksum = "2a4385e2e34eb35d6b3efe798b9eb88096925d87726c0798709bf56d9ed84af3"

 [[package]]
 name = "approx"
@@ -3177,9 +3177,9 @@ dependencies = [

 [[package]]
 name = "env_filter"
-version = "1.0.1"
+version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32e90c2accc4b07a8456ea0debdc2e7587bdd890680d71173a15d4ae604f6eef"
+checksum = "900d271a03799a1ee8d1ca9b19893b48ca674a9284fefcfb85f05e74ed314217"
 dependencies = [
 "log",
 "regex",
@@ -3187,9 +3187,9 @@ dependencies = [

 [[package]]
 name = "env_logger"
-version = "0.11.10"
+version = "0.11.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0621c04f2196ac3f488dd583365b9c09be011a4ab8b9f37248ffcc8f6198b56a"
+checksum = "de671bd27a75a797dc9ae289ba1e77276e75e2026408aab65185384e2d5cd3f6"
 dependencies = [
 "anstream",
 "anstyle",
@@ -3423,8 +3423,8 @@ checksum = "42703706b716c37f96a77aea830392ad231f44c9e9a67872fa5548707e11b11c"

 [[package]]
 name = "fsst"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arrow-array",
 "rand 0.9.4",
@@ -4726,8 +4726,8 @@ checksum = "e037a2e1d8d5fdbd49b16a4ea09d5d6401c1f29eca5ff29d03d3824dba16256a"

 [[package]]
 name = "lance"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arc-swap",
 "arrow",
@@ -4801,8 +4801,8 @@ dependencies = [

 [[package]]
 name = "lance-arrow"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arrow-array",
 "arrow-buffer",
@@ -4823,7 +4823,7 @@ dependencies = [
 [[package]]
 name = "lance-arrow-scalar"
 version = "58.0.0"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arrow-array",
 "arrow-buffer",
@@ -4837,7 +4837,7 @@ dependencies = [
 [[package]]
 name = "lance-arrow-stats"
 version = "58.0.0"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arrow-array",
 "arrow-schema",
@@ -4846,8 +4846,8 @@ dependencies = [

 [[package]]
 name = "lance-bitpacking"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arrayref",
 "crunchy",
@@ -4857,8 +4857,8 @@ dependencies = [

 [[package]]
 name = "lance-core"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arrow-array",
 "arrow-buffer",
@@ -4896,8 +4896,8 @@ dependencies = [

 [[package]]
 name = "lance-datafusion"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arrow",
 "arrow-array",
@@ -4927,8 +4927,8 @@ dependencies = [

 [[package]]
 name = "lance-datagen"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arrow",
 "arrow-array",
@@ -4945,8 +4945,8 @@ dependencies = [

 [[package]]
 name = "lance-derive"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -4955,8 +4955,8 @@ dependencies = [

 [[package]]
 name = "lance-encoding"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arrow-arith",
 "arrow-array",
@@ -4991,8 +4991,8 @@ dependencies = [

 [[package]]
 name = "lance-file"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arrow-arith",
 "arrow-array",
@@ -5022,8 +5022,8 @@ dependencies = [

 [[package]]
 name = "lance-index"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arc-swap",
 "arrow",
@@ -5088,8 +5088,8 @@ dependencies = [

 [[package]]
 name = "lance-io"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arrow",
 "arrow-arith",
@@ -5130,8 +5130,8 @@ dependencies = [

 [[package]]
 name = "lance-linalg"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arrow-array",
 "arrow-buffer",
@@ -5147,8 +5147,8 @@ dependencies = [

 [[package]]
 name = "lance-namespace"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arrow",
 "async-trait",
@@ -5160,8 +5160,8 @@ dependencies = [

 [[package]]
 name = "lance-namespace-impls"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arrow",
 "arrow-ipc",
@@ -5215,8 +5215,8 @@ dependencies = [

 [[package]]
 name = "lance-select"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arrow-array",
 "arrow-buffer",
@@ -5231,8 +5231,8 @@ dependencies = [

 [[package]]
 name = "lance-table"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arrow",
 "arrow-array",
@@ -5271,8 +5271,8 @@ dependencies = [

 [[package]]
 name = "lance-testing"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "arrow-array",
 "arrow-schema",
@@ -5285,8 +5285,8 @@ dependencies = [

 [[package]]
 name = "lance-tokenizer"
-version = "9.0.0-beta.8"
-source = "git+https://github.com/jackye1995/lance.git?branch=jack%2Ffix-fmindex-query-performance#0a43448b3d8a15b9f76a87dace50d30cb3e7b797"
+version = "9.0.0-beta.10"
+source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-beta.10#e25b71e74b89d10c57b412d111bde087117383f3"
 dependencies = [
 "icu_segmenter",
 "jieba-rs",
@@ -5299,7 +5299,7 @@ dependencies = [

 [[package]]
 name = "lancedb"
-version = "0.31.0-beta.3"
+version = "0.31.0-beta.4"
 dependencies = [
 "ahash",
 "anyhow",
@@ -5383,7 +5383,7 @@ dependencies = [

 [[package]]
 name = "lancedb-nodejs"
-version = "0.31.0-beta.3"
+version = "0.31.0-beta.4"
 dependencies = [
 "arrow-array",
 "arrow-buffer",
@@ -5408,7 +5408,7 @@ dependencies = [

 [[package]]
 name = "lancedb-python"
-version = "0.34.0-beta.3"
+version = "0.34.0-beta.4"
 dependencies = [
 "arrow",
 "async-trait",
@@ -5641,9 +5641,9 @@ dependencies = [

 [[package]]
 name = "log"
-version = "0.4.32"
+version = "0.4.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "953f07c43838f8e6f9758cab68bf5bed85465e7587ebe0b823f1bcd81978ad3a"
+checksum = "0ceec5bc11778974d1bcb055b18002eba7f4b3518b6a0081b3af5f21666da9ad"

 [[package]]
 name = "loom"
@@ -5951,9 +5951,9 @@ dependencies = [

 [[package]]
 name = "napi"
-version = "3.9.3"
+version = "3.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fbd9f9295f3ff5921e78a71222c3361a8216f7760b1a99a6ad4e8441de18bbb9"
+checksum = "b41bda2ac390efb5e8d22025d925ccc3f3807d8c1bea6d19b36127247c4b8f83"
 dependencies = [
 "bitflags 2.11.1",
 "chrono",
@@ -5976,9 +5976,9 @@ checksum = "c9c366d2c8c60b86fa632df75f745509b52f9128f91a6bad4c796e44abb505e1"

 [[package]]
 name = "napi-derive"
-version = "3.5.6"
+version = "3.5.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89b3f766e04667e6da0e181e2da4f85475d5a6513b7cf6a80bea184e224a5b42"
+checksum = "61d66f70256ad5aef58659966064471d0ad90e2897bc36a5a5e0389c85aabc1e"
 dependencies = [
 "convert_case",
 "ctor 1.0.5",
@@ -5990,9 +5990,9 @@ dependencies = [

 [[package]]
 name = "napi-derive-backend"
-version = "5.0.4"
+version = "5.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d5af30503edf933ce7377cf6d4c877a62b0f1107ea05585f1b5e430e88d5baf"
+checksum = "81b4b08f15eed7a2a20c3f4c6314013fc3ac890a3afa9892b594485299ebdb2d"
 dependencies = [
 "convert_case",
 "proc-macro2",
@@ -10120,9 +10120,9 @@ checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"

 [[package]]
 name = "uuid"
-version = "1.23.3"
+version = "1.23.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "144d6b123cef80b301b8f72a9e2ca4370ddec21950d0a103dd22c437006d2db7"
+checksum = "bf80a72845275afea99e7f2b434723d3bc7e38470fcd1c7ed39a599c73319a53"
 dependencies = [
 "getrandom 0.4.2",
 "js-sys",
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,20 +13,20 @@ categories = ["database-implementations"]
 rust-version = "1.91.0"

 [workspace.dependencies]
-lance = { "version" = "=9.0.0-beta.8", default-features = false, "branch" = "jack/fix-fmindex-query-performance", "git" = "https://github.com/jackye1995/lance.git" }
-lance-core = { "version" = "=9.0.0-beta.8", "branch" = "jack/fix-fmindex-query-performance", "git" = "https://github.com/jackye1995/lance.git" }
-lance-datagen = { "version" = "=9.0.0-beta.8", "branch" = "jack/fix-fmindex-query-performance", "git" = "https://github.com/jackye1995/lance.git" }
-lance-file = { "version" = "=9.0.0-beta.8", "branch" = "jack/fix-fmindex-query-performance", "git" = "https://github.com/jackye1995/lance.git" }
-lance-io = { "version" = "=9.0.0-beta.8", default-features = false, "branch" = "jack/fix-fmindex-query-performance", "git" = "https://github.com/jackye1995/lance.git" }
-lance-index = { "version" = "=9.0.0-beta.8", "branch" = "jack/fix-fmindex-query-performance", "git" = "https://github.com/jackye1995/lance.git" }
-lance-linalg = { "version" = "=9.0.0-beta.8", "branch" = "jack/fix-fmindex-query-performance", "git" = "https://github.com/jackye1995/lance.git" }
-lance-namespace = { "version" = "=9.0.0-beta.8", "branch" = "jack/fix-fmindex-query-performance", "git" = "https://github.com/jackye1995/lance.git" }
-lance-namespace-impls = { "version" = "=9.0.0-beta.8", default-features = false, "branch" = "jack/fix-fmindex-query-performance", "git" = "https://github.com/jackye1995/lance.git" }
-lance-table = { "version" = "=9.0.0-beta.8", "branch" = "jack/fix-fmindex-query-performance", "git" = "https://github.com/jackye1995/lance.git" }
-lance-testing = { "version" = "=9.0.0-beta.8", "branch" = "jack/fix-fmindex-query-performance", "git" = "https://github.com/jackye1995/lance.git" }
-lance-datafusion = { "version" = "=9.0.0-beta.8", "branch" = "jack/fix-fmindex-query-performance", "git" = "https://github.com/jackye1995/lance.git" }
-lance-encoding = { "version" = "=9.0.0-beta.8", "branch" = "jack/fix-fmindex-query-performance", "git" = "https://github.com/jackye1995/lance.git" }
-lance-arrow = { "version" = "=9.0.0-beta.8", "branch" = "jack/fix-fmindex-query-performance", "git" = "https://github.com/jackye1995/lance.git" }
+lance = { "version" = "=9.0.0-beta.10", default-features = false, "tag" = "v9.0.0-beta.10", "git" = "https://github.com/lance-format/lance.git" }
+lance-core = { "version" = "=9.0.0-beta.10", "tag" = "v9.0.0-beta.10", "git" = "https://github.com/lance-format/lance.git" }
+lance-datagen = { "version" = "=9.0.0-beta.10", "tag" = "v9.0.0-beta.10", "git" = "https://github.com/lance-format/lance.git" }
+lance-file = { "version" = "=9.0.0-beta.10", "tag" = "v9.0.0-beta.10", "git" = "https://github.com/lance-format/lance.git" }
+lance-io = { "version" = "=9.0.0-beta.10", default-features = false, "tag" = "v9.0.0-beta.10", "git" = "https://github.com/lance-format/lance.git" }
+lance-index = { "version" = "=9.0.0-beta.10", "tag" = "v9.0.0-beta.10", "git" = "https://github.com/lance-format/lance.git" }
+lance-linalg = { "version" = "=9.0.0-beta.10", "tag" = "v9.0.0-beta.10", "git" = "https://github.com/lance-format/lance.git" }
+lance-namespace = { "version" = "=9.0.0-beta.10", "tag" = "v9.0.0-beta.10", "git" = "https://github.com/lance-format/lance.git" }
+lance-namespace-impls = { "version" = "=9.0.0-beta.10", default-features = false, "tag" = "v9.0.0-beta.10", "git" = "https://github.com/lance-format/lance.git" }
+lance-table = { "version" = "=9.0.0-beta.10", "tag" = "v9.0.0-beta.10", "git" = "https://github.com/lance-format/lance.git" }
+lance-testing = { "version" = "=9.0.0-beta.10", "tag" = "v9.0.0-beta.10", "git" = "https://github.com/lance-format/lance.git" }
+lance-datafusion = { "version" = "=9.0.0-beta.10", "tag" = "v9.0.0-beta.10", "git" = "https://github.com/lance-format/lance.git" }
+lance-encoding = { "version" = "=9.0.0-beta.10", "tag" = "v9.0.0-beta.10", "git" = "https://github.com/lance-format/lance.git" }
+lance-arrow = { "version" = "=9.0.0-beta.10", "tag" = "v9.0.0-beta.10", "git" = "https://github.com/lance-format/lance.git" }
 ahash = "0.8"
 # Note that this one does not include pyarrow
 arrow = { version = "58.0.0", optional = false }
--- a/docs/src/java/java.md
+++ b/docs/src/java/java.md
@@ -14,7 +14,7 @@ Add the following dependency to your `pom.xml`:
 <dependency>
    <groupId>com.lancedb</groupId>
    <artifactId>lancedb-core</artifactId>
-    <version>0.31.0-beta.3</version>
+    <version>0.31.0-beta.4</version>
 </dependency>
 ```

--- a/docs/src/js/enumerations/OAuthFlowType.md
+++ b/docs/src/js/enumerations/OAuthFlowType.md
@@ -0,0 +1,29 @@
+[**@lancedb/lancedb**](../README.md) • **Docs**
+
+***
+
+[@lancedb/lancedb](../globals.md) / OAuthFlowType
+
+# Enumeration: OAuthFlowType
+
+OAuth authentication flow types.
+
+## Enumeration Members
+
+### AzureManagedIdentity
+
+```ts
+AzureManagedIdentity: "azure_managed_identity";
+```
+
+Azure Managed Identity via IMDS.
+
+***
+
+### ClientCredentials
+
+```ts
+ClientCredentials: "client_credentials";
+```
+
+Client Credentials grant (service-to-service / M2M).
--- a/docs/src/js/globals.md
+++ b/docs/src/js/globals.md
@@ -12,6 +12,7 @@
 ## Enumerations

 - [FullTextQueryType](enumerations/FullTextQueryType.md)
+- [OAuthFlowType](enumerations/OAuthFlowType.md)
 - [Occur](enumerations/Occur.md)
 - [Operator](enumerations/Operator.md)

@@ -85,6 +86,8 @@
 - [ListNamespacesResponse](interfaces/ListNamespacesResponse.md)
 - [LsmWriteSpec](interfaces/LsmWriteSpec.md)
 - [MergeResult](interfaces/MergeResult.md)
+- [NativeOAuthConfig](interfaces/NativeOAuthConfig.md)
+- [OAuthConfig](interfaces/OAuthConfig.md)
 - [OpenTableOptions](interfaces/OpenTableOptions.md)
 - [OptimizeOptions](interfaces/OptimizeOptions.md)
 - [OptimizeStats](interfaces/OptimizeStats.md)
--- a/docs/src/js/interfaces/ConnectionOptions.md
+++ b/docs/src/js/interfaces/ConnectionOptions.md
@@ -64,6 +64,19 @@ client used by manifest-enabled native connections.

 ***

+### oauthConfig?
+
+```ts
+optional oauthConfig: NativeOAuthConfig;
+```
+
+(For LanceDB cloud only): OAuth configuration for IdP-based
+authentication (e.g., Azure Entra ID). When set, token acquisition
+and refresh are handled entirely in Rust. TypeScript users should pass
+the public `OAuthConfig` type exported from `@lancedb/lancedb`.
+
+***
+
 ### readConsistencyInterval?

 ```ts
--- a/docs/src/js/interfaces/NativeOAuthConfig.md
+++ b/docs/src/js/interfaces/NativeOAuthConfig.md
@@ -0,0 +1,88 @@
+[**@lancedb/lancedb**](../README.md) • **Docs**
+
+***
+
+[@lancedb/lancedb](../globals.md) / NativeOAuthConfig
+
+# Interface: NativeOAuthConfig
+
+OAuth configuration for LanceDB authentication.
+
+This is the generated napi-rs binding shape. TypeScript users should prefer
+the public `OAuthConfig` type exported from `@lancedb/lancedb`.
+
+All token acquisition and refresh is handled in the Rust layer.
+
+## Properties
+
+### clientId
+
+```ts
+clientId: string;
+```
+
+Application / Client ID.
+
+***
+
+### clientSecret?
+
+```ts
+optional clientSecret: string;
+```
+
+Client secret (required for client_credentials).
+
+***
+
+### flow?
+
+```ts
+optional flow: string;
+```
+
+Authentication flow: "client_credentials" or "azure_managed_identity"
+
+***
+
+### issuerUrl
+
+```ts
+issuerUrl: string;
+```
+
+OIDC issuer URL or OAuth authority URL.
+For Azure: `https://login.microsoftonline.com/{tenant_id}/v2.0`
+
+***
+
+### managedIdentityClientId?
+
+```ts
+optional managedIdentityClientId: string;
+```
+
+Client ID for user-assigned managed identity (azure_managed_identity).
+
+***
+
+### refreshBufferSecs?
+
+```ts
+optional refreshBufferSecs: number;
+```
+
+Seconds before expiry to trigger proactive refresh (default: 300).
+Keep this well below the token TTL; if it is greater than or equal to
+the TTL, each request refreshes the token.
+
+***
+
+### scopes
+
+```ts
+scopes: string[];
+```
+
+OAuth scopes to request. For Azure managed identity, exactly one scope
+or resource is required. For example: `["api://{app_id}/.default"]`
--- a/docs/src/js/interfaces/OAuthConfig.md
+++ b/docs/src/js/interfaces/OAuthConfig.md
@@ -0,0 +1,111 @@
+[**@lancedb/lancedb**](../README.md) • **Docs**
+
+***
+
+[@lancedb/lancedb](../globals.md) / OAuthConfig
+
+# Interface: OAuthConfig
+
+OAuth configuration for LanceDB authentication.
+
+This is the public TypeScript OAuth configuration type. The generated
+`NativeOAuthConfig` type has the same runtime shape but is an implementation
+detail of the napi-rs binding.
+
+All token acquisition and refresh is handled in the Rust layer.
+This config is passed through to Rust via napi-rs.
+
+## Examples
+
+```typescript
+const config: OAuthConfig = {
+  issuerUrl: "https://login.microsoftonline.com/{tenant}/v2.0",
+  clientId: "app-id",
+  clientSecret: "secret",
+  scopes: ["api://lancedb-api/.default"],
+};
+```
+
+```typescript
+const config: OAuthConfig = {
+  issuerUrl: "https://login.microsoftonline.com/{tenant}/v2.0",
+  clientId: "app-id",
+  scopes: ["api://lancedb-api/.default"],
+  flow: OAuthFlowType.AzureManagedIdentity,
+};
+```
+
+## Properties
+
+### clientId
+
+```ts
+clientId: string;
+```
+
+Application / Client ID.
+
+***
+
+### clientSecret?
+
+```ts
+optional clientSecret: string;
+```
+
+Client secret (required for ClientCredentials).
+
+***
+
+### flow?
+
+```ts
+optional flow: OAuthFlowType;
+```
+
+Authentication flow (default: ClientCredentials).
+
+***
+
+### issuerUrl
+
+```ts
+issuerUrl: string;
+```
+
+OIDC issuer URL or OAuth authority URL.
+For Azure: `https://login.microsoftonline.com/{tenant_id}/v2.0`
+
+***
+
+### managedIdentityClientId?
+
+```ts
+optional managedIdentityClientId: string;
+```
+
+Client ID for user-assigned managed identity (AzureManagedIdentity).
+
+***
+
+### refreshBufferSecs?
+
+```ts
+optional refreshBufferSecs: number;
+```
+
+Seconds before expiry to trigger proactive refresh (default: 300).
+Keep this well below the token TTL; if it is greater than or equal to
+the TTL, each request refreshes the token.
+
+***
+
+### scopes
+
+```ts
+scopes: string[];
+```
+
+OAuth scopes to request.
+For Azure managed identity, exactly one scope or resource is required.
+For example: `["api://{app_id}/.default"]`
--- a/java/lancedb-core/pom.xml
+++ b/java/lancedb-core/pom.xml
@@ -8,7 +8,7 @@
    <parent>
      <groupId>com.lancedb</groupId>
      <artifactId>lancedb-parent</artifactId>
-      <version>0.31.0-beta.3</version>
+      <version>0.31.0-beta.4</version>
      <relativePath>../pom.xml</relativePath>
    </parent>

--- a/java/pom.xml
+++ b/java/pom.xml
@@ -6,7 +6,7 @@

    <groupId>com.lancedb</groupId>
    <artifactId>lancedb-parent</artifactId>
-    <version>0.31.0-beta.3</version>
+    <version>0.31.0-beta.4</version>
    <packaging>pom</packaging>
    <name>${project.artifactId}</name>
    <description>LanceDB Java SDK Parent POM</description>
@@ -28,7 +28,7 @@
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <arrow.version>15.0.0</arrow.version>
-        <lance-core.version>9.0.0-beta.8</lance-core.version>
+        <lance-core.version>9.0.0-beta.10</lance-core.version>
        <spotless.skip>false</spotless.skip>
        <spotless.version>2.30.0</spotless.version>
        <spotless.java.googlejavaformat.version>1.7</spotless.java.googlejavaformat.version>
--- a/nodejs/Cargo.toml
+++ b/nodejs/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "lancedb-nodejs"
 edition.workspace = true
-version = "0.31.0-beta.3"
+version = "0.31.0-beta.4"
 publish = false
 license.workspace = true
 description.workspace = true
--- a/nodejs/lancedb/index.ts
+++ b/nodejs/lancedb/index.ts
@@ -52,6 +52,7 @@ export {
  SplitHashOptions,
  SplitSequentialOptions,
  ShuffleOptions,
+  OAuthConfig as NativeOAuthConfig,
 } from "./native.js";

 export {
@@ -130,6 +131,8 @@ export {
  TokenResponse,
 } from "./header";

+export { OAuthConfig, OAuthFlowType } from "./oauth";
+
 export { MergeInsertBuilder, WriteExecutionOptions } from "./merge";

 export * as embedding from "./embedding";
--- a/nodejs/lancedb/oauth.ts
+++ b/nodejs/lancedb/oauth.ts
@@ -0,0 +1,76 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: Copyright The LanceDB Authors
+
+/**
+ * OAuth authentication flow types.
+ */
+export enum OAuthFlowType {
+  /** Client Credentials grant (service-to-service / M2M). */
+  ClientCredentials = "client_credentials",
+  /** Azure Managed Identity via IMDS. */
+  AzureManagedIdentity = "azure_managed_identity",
+}
+
+/**
+ * OAuth configuration for LanceDB authentication.
+ *
+ * This is the public TypeScript OAuth configuration type. The generated
+ * `NativeOAuthConfig` type has the same runtime shape but is an implementation
+ * detail of the napi-rs binding.
+ *
+ * All token acquisition and refresh is handled in the Rust layer.
+ * This config is passed through to Rust via napi-rs.
+ *
+ * @example Client Credentials (service-to-service):
+ * ```typescript
+ * const config: OAuthConfig = {
+ *   issuerUrl: "https://login.microsoftonline.com/{tenant}/v2.0",
+ *   clientId: "app-id",
+ *   clientSecret: "secret",
+ *   scopes: ["api://lancedb-api/.default"],
+ * };
+ * ```
+ *
+ * @example Azure Managed Identity:
+ * ```typescript
+ * const config: OAuthConfig = {
+ *   issuerUrl: "https://login.microsoftonline.com/{tenant}/v2.0",
+ *   clientId: "app-id",
+ *   scopes: ["api://lancedb-api/.default"],
+ *   flow: OAuthFlowType.AzureManagedIdentity,
+ * };
+ * ```
+ */
+export interface OAuthConfig {
+  /**
+   * OIDC issuer URL or OAuth authority URL.
+   * For Azure: `https://login.microsoftonline.com/{tenant_id}/v2.0`
+   */
+  issuerUrl: string;
+
+  /** Application / Client ID. */
+  clientId: string;
+
+  /**
+   * OAuth scopes to request.
+   * For Azure managed identity, exactly one scope or resource is required.
+   * For example: `["api://{app_id}/.default"]`
+   */
+  scopes: string[];
+
+  /** Authentication flow (default: ClientCredentials). */
+  flow?: OAuthFlowType;
+
+  /** Client secret (required for ClientCredentials). */
+  clientSecret?: string;
+
+  /** Client ID for user-assigned managed identity (AzureManagedIdentity). */
+  managedIdentityClientId?: string;
+
+  /**
+   * Seconds before expiry to trigger proactive refresh (default: 300).
+   * Keep this well below the token TTL; if it is greater than or equal to
+   * the TTL, each request refreshes the token.
+   */
+  refreshBufferSecs?: number;
+}
--- a/nodejs/npm/darwin-arm64/package.json
+++ b/nodejs/npm/darwin-arm64/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@lancedb/lancedb-darwin-arm64",
-	"version": "0.31.0-beta.3",
+	"version": "0.31.0-beta.4",
 	"os": ["darwin"],
 	"cpu": ["arm64"],
 	"main": "lancedb.darwin-arm64.node",
--- a/nodejs/npm/linux-arm64-gnu/package.json
+++ b/nodejs/npm/linux-arm64-gnu/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@lancedb/lancedb-linux-arm64-gnu",
-	"version": "0.31.0-beta.3",
+	"version": "0.31.0-beta.4",
 	"os": ["linux"],
 	"cpu": ["arm64"],
 	"main": "lancedb.linux-arm64-gnu.node",
--- a/nodejs/npm/linux-arm64-musl/package.json
+++ b/nodejs/npm/linux-arm64-musl/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@lancedb/lancedb-linux-arm64-musl",
-	"version": "0.31.0-beta.3",
+	"version": "0.31.0-beta.4",
 	"os": ["linux"],
 	"cpu": ["arm64"],
 	"main": "lancedb.linux-arm64-musl.node",
--- a/nodejs/npm/linux-x64-gnu/package.json
+++ b/nodejs/npm/linux-x64-gnu/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@lancedb/lancedb-linux-x64-gnu",
-	"version": "0.31.0-beta.3",
+	"version": "0.31.0-beta.4",
 	"os": ["linux"],
 	"cpu": ["x64"],
 	"main": "lancedb.linux-x64-gnu.node",
--- a/nodejs/npm/linux-x64-musl/package.json
+++ b/nodejs/npm/linux-x64-musl/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@lancedb/lancedb-linux-x64-musl",
-	"version": "0.31.0-beta.3",
+	"version": "0.31.0-beta.4",
 	"os": ["linux"],
 	"cpu": ["x64"],
 	"main": "lancedb.linux-x64-musl.node",
--- a/nodejs/npm/win32-arm64-msvc/package.json
+++ b/nodejs/npm/win32-arm64-msvc/package.json
@@ -1,6 +1,6 @@
 {
  "name": "@lancedb/lancedb-win32-arm64-msvc",
-  "version": "0.31.0-beta.3",
+  "version": "0.31.0-beta.4",
  "os": [
    "win32"
  ],
--- a/nodejs/npm/win32-x64-msvc/package.json
+++ b/nodejs/npm/win32-x64-msvc/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "@lancedb/lancedb-win32-x64-msvc",
-	"version": "0.31.0-beta.3",
+	"version": "0.31.0-beta.4",
 	"os": ["win32"],
 	"cpu": ["x64"],
 	"main": "lancedb.win32-x64-msvc.node",
--- a/nodejs/package-lock.json
+++ b/nodejs/package-lock.json
@@ -1,12 +1,12 @@
 {
  "name": "@lancedb/lancedb",
-  "version": "0.31.0-beta.3",
+  "version": "0.31.0-beta.4",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "@lancedb/lancedb",
-      "version": "0.31.0-beta.3",
+      "version": "0.31.0-beta.4",
      "cpu": [
        "x64",
        "arm64"
--- a/nodejs/package.json
+++ b/nodejs/package.json
@@ -11,7 +11,7 @@
    "ann"
  ],
  "private": false,
-  "version": "0.31.0-beta.3",
+  "version": "0.31.0-beta.4",
  "main": "dist/index.js",
  "exports": {
    ".": "./dist/index.js",
--- a/nodejs/src/connection.rs
+++ b/nodejs/src/connection.rs
@@ -112,6 +112,12 @@ impl Connection {

        builder = builder.client_config(rust_config);

+        if let Some(oauth_config) = options.oauth_config {
+            let config: lancedb::remote::oauth::OAuthConfig =
+                oauth_config.try_into().default_error()?;
+            builder = builder.oauth_config(config);
+        }
+
        if let Some(api_key) = options.api_key {
            builder = builder.api_key(&api_key);
        }
--- a/nodejs/src/lib.rs
+++ b/nodejs/src/lib.rs
@@ -65,6 +65,11 @@ pub struct ConnectionOptions {
    /// (For LanceDB cloud only): the host to use for LanceDB cloud. Used
    /// for testing purposes.
    pub host_override: Option<String>,
+    /// (For LanceDB cloud only): OAuth configuration for IdP-based
+    /// authentication (e.g., Azure Entra ID). When set, token acquisition
+    /// and refresh are handled entirely in Rust. TypeScript users should pass
+    /// the public `OAuthConfig` type exported from `@lancedb/lancedb`.
+    pub oauth_config: Option<remote::OAuthConfig>,
 }

 #[napi(object)]
--- a/nodejs/src/merge.rs
+++ b/nodejs/src/merge.rs
@@ -3,7 +3,7 @@

 use std::time::Duration;

-use lancedb::{arrow::IntoArrow, ipc::ipc_file_to_batches, table::merge::MergeInsertBuilder};
+use lancedb::{ipc::ipc_file_to_batches, table::merge::MergeInsertBuilder};
 use napi::bindgen_prelude::*;
 use napi_derive::napi;

@@ -66,11 +66,9 @@ impl NativeMergeInsertBuilder {

    #[napi(catch_unwind)]
    pub async fn execute(&self, buf: Buffer) -> napi::Result<MergeResult> {
-        let data = ipc_file_to_batches(buf.to_vec())
-            .and_then(IntoArrow::into_arrow)
-            .map_err(|e| {
-                napi::Error::from_reason(format!("Failed to read IPC file: {}", convert_error(&e)))
-            })?;
+        let data = ipc_file_to_batches(buf.to_vec()).map_err(|e| {
+            napi::Error::from_reason(format!("Failed to read IPC file: {}", convert_error(&e)))
+        })?;

        let this = self.clone();

--- a/nodejs/src/remote.rs
+++ b/nodejs/src/remote.rs
@@ -3,6 +3,7 @@

 use std::collections::HashMap;

+use lancedb::error::Error;
 use napi_derive::*;

 /// Timeout configuration for remote HTTP client.
@@ -140,6 +141,84 @@ impl From<TlsConfig> for lancedb::remote::TlsConfig {
    }
 }

+/// OAuth configuration for LanceDB authentication.
+///
+/// This is the generated napi-rs binding shape. TypeScript users should prefer
+/// the public `OAuthConfig` type exported from `@lancedb/lancedb`.
+///
+/// All token acquisition and refresh is handled in the Rust layer.
+#[napi(object)]
+#[derive(Clone)]
+pub struct OAuthConfig {
+    /// OIDC issuer URL or OAuth authority URL.
+    /// For Azure: `https://login.microsoftonline.com/{tenant_id}/v2.0`
+    pub issuer_url: String,
+    /// Application / Client ID.
+    pub client_id: String,
+    /// OAuth scopes to request. For Azure managed identity, exactly one scope
+    /// or resource is required. For example: `["api://{app_id}/.default"]`
+    pub scopes: Vec<String>,
+    /// Authentication flow: "client_credentials" or "azure_managed_identity"
+    pub flow: Option<String>,
+    /// Client secret (required for client_credentials).
+    pub client_secret: Option<String>,
+    /// Client ID for user-assigned managed identity (azure_managed_identity).
+    pub managed_identity_client_id: Option<String>,
+    /// Seconds before expiry to trigger proactive refresh (default: 300).
+    /// Keep this well below the token TTL; if it is greater than or equal to
+    /// the TTL, each request refreshes the token.
+    pub refresh_buffer_secs: Option<u32>,
+}
+
+impl std::fmt::Debug for OAuthConfig {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("OAuthConfig")
+            .field("issuer_url", &self.issuer_url)
+            .field("client_id", &self.client_id)
+            .field("scopes", &self.scopes)
+            .field("flow", &self.flow)
+            .field(
+                "client_secret",
+                &self.client_secret.as_deref().map(|_| "<redacted>"),
+            )
+            .field(
+                "managed_identity_client_id",
+                &self.managed_identity_client_id,
+            )
+            .field("refresh_buffer_secs", &self.refresh_buffer_secs)
+            .finish()
+    }
+}
+
+impl TryFrom<OAuthConfig> for lancedb::remote::oauth::OAuthConfig {
+    type Error = Error;
+
+    fn try_from(config: OAuthConfig) -> Result<Self, Self::Error> {
+        use lancedb::remote::oauth::OAuthFlow;
+
+        let flow = match config.flow.as_deref().unwrap_or("client_credentials") {
+            "client_credentials" => OAuthFlow::ClientCredentials,
+            "azure_managed_identity" => OAuthFlow::AzureManagedIdentity {
+                client_id: config.managed_identity_client_id,
+            },
+            other => {
+                return Err(Error::InvalidInput {
+                    message: format!("Unknown OAuth flow type: {other}"),
+                });
+            }
+        };
+
+        Ok(Self {
+            issuer_url: config.issuer_url,
+            client_id: config.client_id,
+            client_secret: config.client_secret,
+            scopes: config.scopes,
+            flow,
+            refresh_buffer_secs: config.refresh_buffer_secs.map(|v| v as u64),
+        })
+    }
+}
+
 impl From<ClientConfig> for lancedb::remote::ClientConfig {
    fn from(config: ClientConfig) -> Self {
        Self {
@@ -156,3 +235,45 @@ impl From<ClientConfig> for lancedb::remote::ClientConfig {
        }
    }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_unknown_oauth_flow_returns_invalid_input() {
+        let config = OAuthConfig {
+            issuer_url: "https://issuer.example.com".to_string(),
+            client_id: "client-id".to_string(),
+            scopes: vec!["scope".to_string()],
+            flow: Some("typo".to_string()),
+            client_secret: None,
+            managed_identity_client_id: None,
+            refresh_buffer_secs: None,
+        };
+
+        let err = lancedb::remote::oauth::OAuthConfig::try_from(config).unwrap_err();
+        assert!(matches!(
+            err,
+            Error::InvalidInput { message }
+                if message == "Unknown OAuth flow type: typo"
+        ));
+    }
+
+    #[test]
+    fn test_oauth_config_debug_redacts_client_secret() {
+        let config = OAuthConfig {
+            issuer_url: "https://issuer.example.com".to_string(),
+            client_id: "client-id".to_string(),
+            scopes: vec!["scope".to_string()],
+            flow: Some("client_credentials".to_string()),
+            client_secret: Some("super-secret".to_string()),
+            managed_identity_client_id: None,
+            refresh_buffer_secs: None,
+        };
+
+        let debug = format!("{config:?}");
+        assert!(!debug.contains("super-secret"));
+        assert!(debug.contains("client_secret: Some(\"<redacted>\")"));
+    }
+}
--- a/python/.bumpversion.toml
+++ b/python/.bumpversion.toml
@@ -1,5 +1,5 @@
 [tool.bumpversion]
-current_version = "0.34.0-beta.3"
+current_version = "0.34.0-beta.5"
 parse = """(?x)
    (?P<major>0|[1-9]\\d*)\\.
    (?P<minor>0|[1-9]\\d*)\\.
--- a/python/Cargo.toml
+++ b/python/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "lancedb-python"
-version = "0.34.0-beta.3"
+version = "0.34.0-beta.5"
 publish = false
 edition.workspace = true
 description = "Python bindings for LanceDB"
--- a/python/python/lancedb/init.py
+++ b/python/python/lancedb/init.py
@@ -89,6 +89,8 @@ def connect(
        If presented, connect to LanceDB cloud.
        Otherwise, connect to a database on file system or cloud storage.
        Can be set via environment variable `LANCEDB_API_KEY`.
+        OAuth configuration is currently supported only by ``connect_async``;
+        synchronous LanceDB Cloud connections require an API key.
    region: str, default "us-east-1"
        The region to use for LanceDB Cloud.
    host_override: str, optional
@@ -340,6 +342,7 @@ async def connect_async(
    session: Optional[Session] = None,
    manifest_enabled: bool = False,
    namespace_client_properties: Optional[Dict[str, str]] = None,
+    oauth_config=None,
 ) -> AsyncConnection:
    """Connect to a LanceDB database.

@@ -389,6 +392,10 @@ async def connect_async(
    namespace_client_properties : dict, optional
        Additional directory namespace client properties to use with
        ``manifest_enabled=True``.
+    oauth_config : OAuthConfig, optional
+        OAuth configuration for LanceDB Cloud/Enterprise. This is supported by
+        ``connect_async`` only; synchronous ``connect`` uses API key
+        authentication for ``db://`` URIs.

    Examples
    --------
@@ -435,6 +442,7 @@ async def connect_async(
            session,
            manifest_enabled,
            namespace_client_properties,
+            oauth_config,
        )
    )

--- a/python/python/lancedb/_lancedb.pyi
+++ b/python/python/lancedb/_lancedb.pyi
@@ -280,6 +280,24 @@ async def connect(
    session: Optional[Session],
    manifest_enabled: bool = False,
    namespace_client_properties: Optional[Dict[str, str]] = None,
+    oauth_config: Optional[Any] = None,
+) -> Connection: ...
+def connect_namespace(
+    namespace_client_impl: str,
+    namespace_client_properties: Dict[str, str],
+    read_consistency_interval: Optional[float] = None,
+    storage_options: Optional[Dict[str, str]] = None,
+    session: Optional[Session] = None,
+    namespace_client_pushdown_operations: Optional[List[str]] = None,
+) -> Connection: ...
+def connect_namespace_client(
+    namespace_client: Any,
+    read_consistency_interval: Optional[float] = None,
+    storage_options: Optional[Dict[str, str]] = None,
+    session: Optional[Session] = None,
+    namespace_client_pushdown_operations: Optional[List[str]] = None,
+    namespace_client_impl: Optional[str] = None,
+    namespace_client_properties: Optional[Dict[str, str]] = None,
 ) -> Connection: ...

 class RecordBatchStream:
--- a/python/python/lancedb/namespace.py
+++ b/python/python/lancedb/namespace.py
@@ -38,8 +38,11 @@ from lance_namespace_urllib3_client.models.query_table_request_vector import (
    QueryTableRequestVector,
 )
 from lance_namespace_urllib3_client.models.string_fts_query import StringFtsQuery
-from lance_namespace.errors import TableNotFoundError
-from lancedb._lancedb import connect_namespace_client as _connect_namespace_client
+from lance_namespace.errors import NamespaceNotEmptyError, TableNotFoundError
+from lancedb._lancedb import (
+    connect_namespace as _connect_namespace,
+    connect_namespace_client as _connect_namespace_client,
+)
 from lancedb.background_loop import LOOP
 from lancedb.db import AsyncConnection, DBConnection
 from lancedb.namespace_utils import (
@@ -386,6 +389,10 @@ def _builds_namespace_natively(
    return namespace_client_impl == "rest" and bool(namespace_client_properties)


+def _supports_native_sync_namespace(namespace_client_impl: str) -> bool:
+    return namespace_client_impl in {"dir", "rest"}
+
+
 class LanceNamespaceDBConnection(DBConnection):
    """
    A LanceDB connection that uses a namespace for table management.
@@ -396,7 +403,7 @@ class LanceNamespaceDBConnection(DBConnection):

    def __init__(
        self,
-        namespace_client: LanceNamespace,
+        namespace_client: Optional[LanceNamespace] = None,
        *,
        read_consistency_interval: Optional[timedelta] = None,
        storage_options: Optional[Dict[str, str]] = None,
@@ -404,6 +411,8 @@ class LanceNamespaceDBConnection(DBConnection):
        namespace_client_pushdown_operations: Optional[List[str]] = None,
        namespace_client_impl: Optional[str] = None,
        namespace_client_properties: Optional[Dict[str, str]] = None,
+        _inner: Optional[AsyncConnection] = None,
+        _route_pushdown_to_rust: Optional[bool] = None,
    ):
        """
        Initialize a namespace-based LanceDB connection.
@@ -449,26 +458,36 @@ class LanceNamespaceDBConnection(DBConnection):
        # ``build_namespace_natively``), the underlying Rust table performs
        # QueryTable pushdown through the read-freshness context provider, which
        # the pure-Python ``query_table`` path bypasses.
-        self._route_pushdown_to_rust = _builds_namespace_natively(
-            namespace_client_impl, namespace_client_properties
-        )
-        self._inner = AsyncConnection(
-            _connect_namespace_client(
-                namespace_client,
-                read_consistency_interval=(
-                    read_consistency_interval.total_seconds()
-                    if read_consistency_interval is not None
-                    else None
-                ),
-                storage_options=self.storage_options or None,
-                session=session,
-                namespace_client_pushdown_operations=(
-                    list(self._namespace_client_pushdown_operations)
-                ),
-                namespace_client_impl=namespace_client_impl,
-                namespace_client_properties=namespace_client_properties,
+        self._route_pushdown_to_rust = (
+            _route_pushdown_to_rust
+            if _route_pushdown_to_rust is not None
+            else _builds_namespace_natively(
+                namespace_client_impl, namespace_client_properties
            )
        )
+        if _inner is not None:
+            self._inner = _inner
+        else:
+            if namespace_client is None:
+                raise ValueError("namespace_client is required without a native _inner")
+            self._inner = AsyncConnection(
+                _connect_namespace_client(
+                    namespace_client,
+                    read_consistency_interval=(
+                        read_consistency_interval.total_seconds()
+                        if read_consistency_interval is not None
+                        else None
+                    ),
+                    storage_options=self.storage_options or None,
+                    session=session,
+                    namespace_client_pushdown_operations=(
+                        list(self._namespace_client_pushdown_operations)
+                    ),
+                    namespace_client_impl=namespace_client_impl,
+                    namespace_client_properties=namespace_client_properties,
+                )
+            )
+        self._uri = self._inner.uri

    @override
    def serialize(self) -> str:
@@ -514,11 +533,11 @@ class LanceNamespaceDBConnection(DBConnection):
        )
        if namespace_path is None:
            namespace_path = []
-        request = ListTablesRequest(
-            id=namespace_path, page_token=page_token, limit=limit
+        return LOOP.run(
+            self._inner.table_names(
+                namespace_path=namespace_path, start_after=page_token, limit=limit
+            )
        )
-        response = self._namespace_client.list_tables(request)
-        return response.tables if response.tables else []

    @override
    def create_table(
@@ -589,8 +608,8 @@ class LanceNamespaceDBConnection(DBConnection):
                    index_cache_size=index_cache_size,
                )
            )
-        except RuntimeError as e:
-            if "Table not found" in str(e):
+        except (RuntimeError, ValueError) as e:
+            if "Table not found" in str(e) or "was not found" in str(e):
                table_id = namespace_path + [name]
                raise TableNotFoundError(f"Table not found: {'$'.join(table_id)}")
            raise
@@ -612,12 +631,9 @@ class LanceNamespaceDBConnection(DBConnection):

    @override
    def drop_table(self, name: str, namespace_path: Optional[List[str]] = None):
-        # Use namespace drop_table directly
        if namespace_path is None:
            namespace_path = []
-        table_id = namespace_path + [name]
-        request = DropTableRequest(id=table_id)
-        self._namespace_client.drop_table(request)
+        LOOP.run(self._inner.drop_table(name, namespace_path=namespace_path))

    @override
    def rename_table(
@@ -631,14 +647,19 @@ class LanceNamespaceDBConnection(DBConnection):
            cur_namespace_path = []
        if new_namespace_path is None:
            new_namespace_path = []
-        cur_table_id = cur_namespace_path + [cur_name]
-        new_namespace_id = new_namespace_path if new_namespace_path else None
-        request = RenameTableRequest(
-            id=cur_table_id,
-            new_table_name=new_name,
-            new_namespace_id=new_namespace_id,
-        )
-        self._namespace_client.rename_table(request)
+        try:
+            LOOP.run(
+                self._inner.rename_table(
+                    cur_name,
+                    new_name,
+                    cur_namespace_path=cur_namespace_path,
+                    new_namespace_path=new_namespace_path,
+                )
+            )
+        except RuntimeError as e:
+            if "rename_table not implemented" in str(e):
+                raise NotImplementedError("rename_table not implemented") from e
+            raise

    @override
    def drop_database(self):
@@ -650,8 +671,7 @@ class LanceNamespaceDBConnection(DBConnection):
    def drop_all_tables(self, namespace_path: Optional[List[str]] = None):
        if namespace_path is None:
            namespace_path = []
-        for table_name in self.table_names(namespace_path=namespace_path):
-            self.drop_table(table_name, namespace_path=namespace_path)
+        LOOP.run(self._inner.drop_all_tables(namespace_path=namespace_path))

    @override
    def list_namespaces(
@@ -681,13 +701,10 @@ class LanceNamespaceDBConnection(DBConnection):
        """
        if namespace_path is None:
            namespace_path = []
-        request = ListNamespacesRequest(
-            id=namespace_path, page_token=page_token, limit=limit
-        )
-        response = self._namespace_client.list_namespaces(request)
-        return ListNamespacesResponse(
-            namespaces=response.namespaces if response.namespaces else [],
-            page_token=response.page_token,
+        return LOOP.run(
+            self._inner.list_namespaces(
+                namespace_path=namespace_path, page_token=page_token, limit=limit
+            )
        )

    @override
@@ -715,14 +732,12 @@ class LanceNamespaceDBConnection(DBConnection):
        CreateNamespaceResponse
            Response containing the properties of the created namespace.
        """
-        request = CreateNamespaceRequest(
-            id=namespace_path,
-            mode=_normalize_create_namespace_mode(mode),
-            properties=properties,
-        )
-        response = self._namespace_client.create_namespace(request)
-        return CreateNamespaceResponse(
-            properties=response.properties if hasattr(response, "properties") else None
+        return LOOP.run(
+            self._inner.create_namespace(
+                namespace_path=namespace_path,
+                mode=mode,
+                properties=properties,
+            )
        )

    @override
@@ -750,20 +765,18 @@ class LanceNamespaceDBConnection(DBConnection):
        DropNamespaceResponse
            Response containing properties and transaction_id if applicable.
        """
-        request = DropNamespaceRequest(
-            id=namespace_path,
-            mode=_normalize_drop_namespace_mode(mode),
-            behavior=_normalize_drop_namespace_behavior(behavior),
-        )
-        response = self._namespace_client.drop_namespace(request)
-        return DropNamespaceResponse(
-            properties=(
-                response.properties if hasattr(response, "properties") else None
-            ),
-            transaction_id=(
-                response.transaction_id if hasattr(response, "transaction_id") else None
-            ),
-        )
+        try:
+            return LOOP.run(
+                self._inner.drop_namespace(
+                    namespace_path=namespace_path,
+                    mode=mode,
+                    behavior=behavior,
+                )
+            )
+        except RuntimeError as e:
+            if "Namespace not empty" in str(e):
+                raise NamespaceNotEmptyError(str(e)) from e
+            raise

    @override
    def describe_namespace(
@@ -782,11 +795,7 @@ class LanceNamespaceDBConnection(DBConnection):
        DescribeNamespaceResponse
            Response containing the namespace properties.
        """
-        request = DescribeNamespaceRequest(id=namespace_path)
-        response = self._namespace_client.describe_namespace(request)
-        return DescribeNamespaceResponse(
-            properties=response.properties if hasattr(response, "properties") else None
-        )
+        return LOOP.run(self._inner.describe_namespace(namespace_path))

    @override
    def list_tables(
@@ -816,13 +825,10 @@ class LanceNamespaceDBConnection(DBConnection):
        """
        if namespace_path is None:
            namespace_path = []
-        request = ListTablesRequest(
-            id=namespace_path, page_token=page_token, limit=limit
-        )
-        response = self._namespace_client.list_tables(request)
-        return ListTablesResponse(
-            tables=response.tables if response.tables else [],
-            page_token=response.page_token,
+        return LOOP.run(
+            self._inner.list_tables(
+                namespace_path=namespace_path, page_token=page_token, limit=limit
+            )
        )

    def _lance_table_from_uri(
@@ -878,6 +884,18 @@ class LanceNamespaceDBConnection(DBConnection):
        LanceNamespace
            The namespace client for this connection.
        """
+        if self._namespace_client is None:
+            if (
+                self._namespace_client_impl is None
+                or self._namespace_client_properties is None
+            ):
+                raise ValueError(
+                    "Cannot construct a Python namespace client without "
+                    "namespace implementation properties"
+                )
+            self._namespace_client = namespace_connect(
+                self._namespace_client_impl, self._namespace_client_properties
+            )
        return self._namespace_client


@@ -1342,6 +1360,33 @@ def connect_namespace(
    LanceNamespaceDBConnection
        A namespace-based connection to LanceDB
    """
+    if _supports_native_sync_namespace(namespace_client_impl):
+        inner = AsyncConnection(
+            _connect_namespace(
+                namespace_client_impl,
+                namespace_client_properties,
+                read_consistency_interval=(
+                    read_consistency_interval.total_seconds()
+                    if read_consistency_interval is not None
+                    else None
+                ),
+                storage_options=storage_options,
+                session=session,
+                namespace_client_pushdown_operations=namespace_client_pushdown_operations,
+            )
+        )
+        return LanceNamespaceDBConnection(
+            namespace_client=None,
+            read_consistency_interval=read_consistency_interval,
+            storage_options=storage_options,
+            session=session,
+            namespace_client_pushdown_operations=namespace_client_pushdown_operations,
+            namespace_client_impl=namespace_client_impl,
+            namespace_client_properties=namespace_client_properties,
+            _inner=inner,
+            _route_pushdown_to_rust=True,
+        )
+
    namespace_client = namespace_connect(
        namespace_client_impl, namespace_client_properties
    )
--- a/python/python/lancedb/permutation.py
+++ b/python/python/lancedb/permutation.py
@@ -48,6 +48,14 @@ class PermutationBuilder:
        By default, the permutation builder will create a single split that contains all
        rows in the same order as the base table.
        """
+        if not hasattr(table, "_inner"):
+            raise TypeError(
+                f"PermutationBuilder requires a local LanceTable, "
+                f"got {type(table).__name__}. "
+                "The permutation API is not supported on remote tables. "
+                "Remote tables connect to LanceDB Cloud or Enterprise and do not have "
+                "direct access to the underlying Lance dataset needed for permutations."
+            )
        self._async = async_permutation_builder(table)

    def split_random(
--- a/python/python/lancedb/remote/init.py
+++ b/python/python/lancedb/remote/init.py
@@ -9,6 +9,7 @@ from typing import List, Optional
 from lancedb import __version__

 from .header import HeaderProvider
+from .oauth import OAuthConfig, OAuthFlowType

 __all__ = [
    "TimeoutConfig",
@@ -16,6 +17,8 @@ __all__ = [
    "TlsConfig",
    "ClientConfig",
    "HeaderProvider",
+    "OAuthConfig",
+    "OAuthFlowType",
 ]


--- a/python/python/lancedb/remote/oauth.py
+++ b/python/python/lancedb/remote/oauth.py
@@ -0,0 +1,75 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright The LanceDB Authors
+
+from dataclasses import dataclass, field
+from enum import Enum
+from typing import List, Optional
+
+
+class OAuthFlowType(str, Enum):
+    """OAuth authentication flow types."""
+
+    CLIENT_CREDENTIALS = "client_credentials"
+    """Client Credentials grant (service-to-service / M2M)."""
+
+    AZURE_MANAGED_IDENTITY = "azure_managed_identity"
+    """Azure Managed Identity via IMDS."""
+
+
+@dataclass
+class OAuthConfig:
+    """OAuth configuration for LanceDB authentication.
+
+    All token acquisition and refresh is handled in the Rust layer.
+    This config is passed through to Rust via PyO3.
+
+    Parameters
+    ----------
+    issuer_url : str
+        OIDC issuer URL or OAuth authority URL.
+        For Azure: ``https://login.microsoftonline.com/{tenant_id}/v2.0``
+    client_id : str
+        Application / Client ID.
+    scopes : List[str]
+        OAuth scopes to request.
+        For Azure managed identity, exactly one scope or resource is required.
+        For example: ``["api://{app_id}/.default"]``
+    flow : OAuthFlowType
+        Authentication flow to use. Default: CLIENT_CREDENTIALS.
+    client_secret : Optional[str]
+        Client secret (required for CLIENT_CREDENTIALS).
+    managed_identity_client_id : Optional[str]
+        Client ID for user-assigned managed identity (AZURE_MANAGED_IDENTITY).
+    refresh_buffer_secs : Optional[int]
+        Seconds before expiry to trigger proactive refresh (default: 300).
+        Keep this well below the token TTL; if it is greater than or equal to
+        the TTL, each request refreshes the token.
+
+    Examples
+    --------
+    Client Credentials (service-to-service):
+
+    >>> config = OAuthConfig(
+    ...     issuer_url="https://login.microsoftonline.com/{tenant}/v2.0",
+    ...     client_id="app-id",
+    ...     client_secret="secret",
+    ...     scopes=["api://lancedb-api/.default"],
+    ... )
+
+    Azure Managed Identity:
+
+    >>> config = OAuthConfig(
+    ...     issuer_url="https://login.microsoftonline.com/{tenant}/v2.0",
+    ...     client_id="app-id",
+    ...     scopes=["api://lancedb-api/.default"],
+    ...     flow=OAuthFlowType.AZURE_MANAGED_IDENTITY,
+    ... )
+    """
+
+    issuer_url: str
+    client_id: str
+    scopes: List[str]
+    flow: OAuthFlowType = OAuthFlowType.CLIENT_CREDENTIALS
+    client_secret: Optional[str] = field(default=None, repr=False)
+    managed_identity_client_id: Optional[str] = None
+    refresh_buffer_secs: Optional[int] = None
--- a/python/python/lancedb/table.py
+++ b/python/python/lancedb/table.py
@@ -2142,12 +2142,19 @@ class LanceTable(Table):

        branch = self.current_branch()
        version = None if branch is not None else self.version
-        if self._namespace_client is not None:
+        namespace_client = self._namespace_client
+        if namespace_client is None:
+            conn_uri = getattr(self._conn, "uri", "")
+            if get_uri_scheme(conn_uri) == "namespace":
+                namespace_client = self._conn.namespace_client()
+                self._namespace_client = namespace_client
+
+        if namespace_client is not None:
            table_id = self._namespace_path + [self.name]
            ds = lance.dataset(
                version=version,
                storage_options=self._conn.storage_options,
-                namespace_client=self._namespace_client,
+                namespace_client=namespace_client,
                table_id=table_id,
                **kwargs,
            )
--- a/python/python/tests/test_namespace.py
+++ b/python/python/tests/test_namespace.py
@@ -5,6 +5,7 @@

 import tempfile
 import shutil
+import importlib
 import pytest
 import pyarrow as pa
 import lancedb
@@ -103,6 +104,40 @@ class TestNamespaceConnection:
        assert isinstance(db, lancedb.LanceNamespaceDBConnection)
        assert len(list(db.table_names())) == 0

+    def test_sync_builtin_namespace_uses_rust_without_python_client(self, monkeypatch):
+        """Built-in sync namespace connections should not construct or call the
+        Python namespace client for normal namespace/table management."""
+        namespace_module = importlib.import_module("lancedb.namespace")
+
+        def fail_namespace_connect(*args, **kwargs):
+            raise AssertionError("Python namespace client should not be constructed")
+
+        monkeypatch.setattr(
+            namespace_module, "namespace_connect", fail_namespace_connect
+        )
+
+        db = lancedb.connect_namespace("dir", {"root": self.temp_dir})
+        assert isinstance(db, lancedb.LanceNamespaceDBConnection)
+        assert db._namespace_client is None
+        assert db._route_pushdown_to_rust is True
+
+        db.create_namespace(["test_ns"])
+        assert "test_ns" in db.list_namespaces().namespaces
+
+        schema = pa.schema([pa.field("id", pa.int64())])
+        table = db.create_table("test_table", schema=schema, namespace_path=["test_ns"])
+        assert table.namespace == ["test_ns"]
+        assert "test_table" in db.table_names(namespace_path=["test_ns"])
+        assert "test_table" in db.list_tables(namespace_path=["test_ns"]).tables
+
+        opened = db.open_table("test_table", namespace_path=["test_ns"])
+        assert opened.namespace == ["test_ns"]
+
+        db.drop_table("test_table", namespace_path=["test_ns"])
+        assert db.list_tables(namespace_path=["test_ns"]).tables == []
+        db.drop_namespace(["test_ns"])
+        assert "test_ns" not in db.list_namespaces().namespaces
+
    def test_create_table_through_namespace(self):
        """Test creating a table through namespace."""
        db = lancedb.connect_namespace("dir", {"root": self.temp_dir})
@@ -818,10 +853,11 @@ class TestPushdownOperations:
        )
        assert db._route_pushdown_to_rust is True

-    def test_route_pushdown_to_rust_false_for_dir(self):
-        """A non-native (dir) connection keeps the Python pushdown path."""
+    def test_route_pushdown_to_rust_for_native_dir(self):
+        """The sync dir connection is natively built and defers QueryTable
+        pushdown to Rust."""
        db = lancedb.connect_namespace("dir", {"root": self.temp_dir})
-        assert db._route_pushdown_to_rust is False
+        assert db._route_pushdown_to_rust is True

    def test_async_route_pushdown_to_rust_for_native_rest(self):
        """The async connection must not silently bypass the read-freshness fix:
--- a/python/python/tests/test_table.py
+++ b/python/python/tests/test_table.py
@@ -1137,6 +1137,16 @@ def test_namespace_open_table_with_branch_version(tmp_path):
    assert db.open_table("t", namespace_path=["ns1"], branch="exp").count_rows() == 3


+def test_namespace_root_table_to_lance_uses_namespace_client(tmp_path):
+    pytest.importorskip("lance")  # "dir" impl is lance.namespace.DirectoryNamespace
+    db = lancedb.connect_namespace("dir", {"root": str(tmp_path)})
+    table = db.create_table("t", [{"i": 0}])
+
+    assert table._namespace_client is None
+    assert table.to_lance().count_rows() == 1
+    assert table._namespace_client is not None
+
+
@pytest.mark.asyncio
 async def test_async_namespace_open_table_with_branch_version(tmp_path):
    pytest.importorskip("lance")  # "dir" impl is lance.namespace.DirectoryNamespace
--- a/python/src/connection.rs
+++ b/python/src/connection.rs
@@ -539,7 +539,7 @@ impl Connection {
 }

 #[pyfunction]
-#[pyo3(signature = (uri, api_key=None, region=None, host_override=None, read_consistency_interval=None, client_config=None, storage_options=None, session=None, manifest_enabled=false, namespace_client_properties=None))]
+#[pyo3(signature = (uri, api_key=None, region=None, host_override=None, read_consistency_interval=None, client_config=None, storage_options=None, session=None, manifest_enabled=false, namespace_client_properties=None, oauth_config=None))]
 #[allow(clippy::too_many_arguments)]
 pub fn connect(
    py: Python<'_>,
@@ -553,6 +553,7 @@ pub fn connect(
    session: Option<crate::session::Session>,
    manifest_enabled: bool,
    namespace_client_properties: Option<HashMap<String, String>>,
+    oauth_config: Option<crate::oauth::PyOAuthConfig>,
 ) -> PyResult<Bound<'_, PyAny>> {
    future_into_py(py, async move {
        let mut builder = lancedb::connect(&uri);
@@ -582,6 +583,11 @@ pub fn connect(
        if let Some(client_config) = client_config {
            builder = builder.client_config(client_config.into());
        }
+        if let Some(oauth_config) = oauth_config {
+            let config: lancedb::remote::oauth::OAuthConfig =
+                oauth_config.try_into().infer_error()?;
+            builder = builder.oauth_config(config);
+        }
        if let Some(session) = session {
            builder = builder.session(session.inner.clone());
        }
@@ -649,6 +655,46 @@ pub fn connect_namespace_client(
    )))
 }

+#[pyfunction]
+#[pyo3(signature = (
+    namespace_client_impl,
+    namespace_client_properties,
+    read_consistency_interval=None,
+    storage_options=None,
+    session=None,
+    namespace_client_pushdown_operations=None,
+))]
+#[allow(clippy::too_many_arguments)]
+pub fn connect_namespace(
+    namespace_client_impl: String,
+    namespace_client_properties: HashMap<String, String>,
+    read_consistency_interval: Option<f64>,
+    storage_options: Option<HashMap<String, String>>,
+    session: Option<crate::session::Session>,
+    namespace_client_pushdown_operations: Option<Vec<String>>,
+) -> PyResult<Connection> {
+    let read_consistency_interval = read_consistency_interval.map(Duration::from_secs_f64);
+    let namespace_client_pushdown_operations =
+        parse_namespace_client_pushdown_operations(namespace_client_pushdown_operations)?;
+
+    let mut builder =
+        lancedb::connect_namespace(&namespace_client_impl, namespace_client_properties)
+            .pushdown_operations(namespace_client_pushdown_operations);
+    if let Some(storage_options) = storage_options {
+        builder = builder.storage_options(storage_options);
+    }
+    if let Some(read_consistency_interval) = read_consistency_interval {
+        builder = builder.read_consistency_interval(read_consistency_interval);
+    }
+    if let Some(session) = session {
+        builder = builder.session(session.inner.clone());
+    }
+
+    Ok(Connection::new(
+        crate::runtime::block_on(builder.execute()).infer_error()?,
+    ))
+}
+
 /// Whether to build the namespace natively (from impl + properties) instead of
 /// wrapping a pre-built client. Native construction is required for the
 /// read-freshness provider to be installed
--- a/python/src/lib.rs
+++ b/python/src/lib.rs
@@ -2,7 +2,7 @@
 // SPDX-FileCopyrightText: Copyright The LanceDB Authors

 use arrow::RecordBatchStream;
-use connection::{Connection, connect, connect_namespace_client};
+use connection::{Connection, connect, connect_namespace, connect_namespace_client};
 use env_logger::Env;
 use expr::{PyExpr, expr_col, expr_func, expr_lit};
 use index::IndexConfig;
@@ -26,6 +26,7 @@ pub mod expr;
 pub mod header;
 pub mod index;
 pub mod namespace;
+pub mod oauth;
 pub mod permutation;
 pub mod query;
 pub mod runtime;
@@ -61,6 +62,7 @@ pub fn _lancedb(_py: Python, m: &Bound<'_, PyModule>) -> PyResult<()> {
    m.add_class::<PyPermutationReader>()?;
    m.add_class::<PyExpr>()?;
    m.add_function(wrap_pyfunction!(connect, m)?)?;
+    m.add_function(wrap_pyfunction!(connect_namespace, m)?)?;
    m.add_function(wrap_pyfunction!(connect_namespace_client, m)?)?;
    m.add_function(wrap_pyfunction!(permutation::async_permutation_builder, m)?)?;
    m.add_function(wrap_pyfunction!(util::validate_table_name, m)?)?;
--- a/python/src/oauth.rs
+++ b/python/src/oauth.rs
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: Copyright The LanceDB Authors
+
+use pyo3::FromPyObject;
+
+use lancedb::error::Error;
+use lancedb::remote::oauth::{OAuthConfig, OAuthFlow};
+
+/// Python-side OAuth configuration, extracted via FromPyObject.
+/// Maps to `lancedb.remote.oauth.OAuthConfig` Python dataclass.
+#[derive(FromPyObject)]
+pub struct PyOAuthConfig {
+    pub issuer_url: String,
+    pub client_id: String,
+    pub scopes: Vec<String>,
+    pub flow: String,
+    pub client_secret: Option<String>,
+    pub managed_identity_client_id: Option<String>,
+    pub refresh_buffer_secs: Option<u64>,
+}
+
+impl TryFrom<PyOAuthConfig> for OAuthConfig {
+    type Error = Error;
+
+    fn try_from(py: PyOAuthConfig) -> Result<Self, Self::Error> {
+        let flow = match py.flow.as_str() {
+            "client_credentials" => OAuthFlow::ClientCredentials,
+            "azure_managed_identity" => OAuthFlow::AzureManagedIdentity {
+                client_id: py.managed_identity_client_id,
+            },
+            other => {
+                return Err(Error::InvalidInput {
+                    message: format!("Unknown OAuth flow type: {other}"),
+                });
+            }
+        };
+
+        Ok(Self {
+            issuer_url: py.issuer_url,
+            client_id: py.client_id,
+            client_secret: py.client_secret,
+            scopes: py.scopes,
+            flow,
+            refresh_buffer_secs: py.refresh_buffer_secs,
+        })
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_unknown_oauth_flow_returns_invalid_input() {
+        let config = PyOAuthConfig {
+            issuer_url: "https://issuer.example.com".to_string(),
+            client_id: "client-id".to_string(),
+            scopes: vec!["scope".to_string()],
+            flow: "typo".to_string(),
+            client_secret: None,
+            managed_identity_client_id: None,
+            refresh_buffer_secs: None,
+        };
+
+        let err = OAuthConfig::try_from(config).unwrap_err();
+        assert!(matches!(
+            err,
+            Error::InvalidInput { message }
+                if message == "Unknown OAuth flow type: typo"
+        ));
+    }
+}
--- a/python/tests/test_oauth.py
+++ b/python/tests/test_oauth.py
@@ -0,0 +1,33 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright The LanceDB Authors
+
+import importlib.util
+import sys
+from pathlib import Path
+
+
+def _load_oauth_module():
+    oauth_path = (
+        Path(__file__).parents[1] / "python" / "lancedb" / "remote" / "oauth.py"
+    )
+    spec = importlib.util.spec_from_file_location("lancedb_remote_oauth", oauth_path)
+    module = importlib.util.module_from_spec(spec)
+    assert spec.loader is not None
+    sys.modules[spec.name] = module
+    spec.loader.exec_module(module)
+    return module
+
+
+def test_oauth_config_repr_redacts_client_secret():
+    oauth = _load_oauth_module()
+
+    config = oauth.OAuthConfig(
+        issuer_url="https://issuer.example.com",
+        client_id="client-id",
+        scopes=["scope"],
+        client_secret="super-secret",
+    )
+
+    rendered = repr(config)
+    assert "super-secret" not in rendered
+    assert "client_secret" not in rendered
--- a/rust/lancedb/Cargo.toml
+++ b/rust/lancedb/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "lancedb"
-version = "0.31.0-beta.3"
+version = "0.31.0-beta.4"
 edition.workspace = true
 description = "LanceDB: A serverless, low-latency vector database for AI applications"
 license.workspace = true
@@ -166,6 +166,10 @@ required-features = ["bedrock"]
 [[example]]
 name = "simple"

+[[example]]
+name = "polars"
+required-features = ["polars"]
+
 [[example]]
 name = "full_text_search"

--- a/rust/lancedb/examples/polars.rs
+++ b/rust/lancedb/examples/polars.rs
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: Copyright The LanceDB Authors
+
+//! This example demonstrates ingesting a Polars DataFrame into LanceDB and
+//! reading it back out as a Polars DataFrame.
+
+use lancedb::arrow::IntoPolars;
+use lancedb::query::ExecutableQuery;
+use lancedb::{Result, connect};
+use polars::prelude::{DataFrame, NamedFrom, Series};
+
+fn make_dataframe() -> DataFrame {
+    let ids = Series::new("id", &[1i32, 2, 3, 4, 5]);
+    let names = Series::new("name", &["Alice", "Bob", "Carol", "Dave", "Eve"]);
+    let scores = Series::new("score", &[9.5f64, 8.1, 7.3, 9.0, 6.5]);
+    DataFrame::new(vec![ids, names, scores]).unwrap()
+}
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    let tmp = tempfile::tempdir().unwrap();
+    let db = connect(tmp.path().to_str().unwrap()).execute().await?;
+
+    // Ingest a Polars DataFrame directly — DataFrame now implements Scannable.
+    let df = make_dataframe();
+    println!("Input DataFrame:\n{df}");
+
+    let table = db.create_table("people", df).execute().await?;
+
+    // Append more rows.
+    let more = DataFrame::new(vec![
+        Series::new("id", &[6i32, 7]),
+        Series::new("name", &["Frank", "Grace"]),
+        Series::new("score", &[7.8f64, 8.9]),
+    ])
+    .unwrap();
+    table.add(more).execute().await?;
+
+    // Read back as a Polars DataFrame.
+    let result_df = table.query().execute().await?.into_polars().await?;
+
+    println!(
+        "\nRound-tripped DataFrame ({} rows):\n{result_df}",
+        result_df.height()
+    );
+    Ok(())
+}
--- a/rust/lancedb/src/arrow.rs
+++ b/rust/lancedb/src/arrow.rs
@@ -112,54 +112,14 @@ impl<S: Stream<Item = Result<arrow_array::RecordBatch>>> RecordBatchStream

 /// A trait for converting incoming data to Arrow
 ///
-/// Integrations should implement this trait to allow data to be
-/// imported directly from the integration.  For example, implementing
-/// this trait for `Vec<Vec<...>>` would allow the `Vec` to be directly
-/// used in methods like [`crate::connection::Connection::create_table`]
-/// or [`crate::table::Table::add`]
-pub trait IntoArrow {
-    /// Convert the data into an iterator of Arrow batches
-    fn into_arrow(self) -> Result<Box<dyn arrow_array::RecordBatchReader + Send>>;
-}
-
 pub type BoxedRecordBatchReader = Box<dyn arrow_array::RecordBatchReader + Send>;

-impl<T: arrow_array::RecordBatchReader + Send + 'static> IntoArrow for T {
-    fn into_arrow(self) -> Result<Box<dyn arrow_array::RecordBatchReader + Send>> {
-        Ok(Box::new(self))
-    }
-}
-
-/// A trait for converting incoming data to Arrow asynchronously
-///
-/// Serves the same purpose as [`IntoArrow`], but for asynchronous data.
-///
-/// Note: Arrow has no async equivalent to RecordBatchReader and so
-pub trait IntoArrowStream {
-    /// Convert the data into a stream of Arrow batches
-    fn into_arrow(self) -> Result<SendableRecordBatchStream>;
-}
-
 impl<S: Stream<Item = Result<arrow_array::RecordBatch>>> SimpleRecordBatchStream<S> {
    pub fn new(stream: S, schema: Arc<arrow_schema::Schema>) -> Self {
        Self { schema, stream }
    }
 }

-impl IntoArrowStream for SendableRecordBatchStream {
-    fn into_arrow(self) -> Result<SendableRecordBatchStream> {
-        Ok(self)
-    }
-}
-
-impl IntoArrowStream for datafusion_physical_plan::SendableRecordBatchStream {
-    fn into_arrow(self) -> Result<SendableRecordBatchStream> {
-        let schema = self.schema();
-        let stream = self.map_err(|df_err| df_err.into());
-        Ok(Box::pin(SimpleRecordBatchStream::new(stream, schema)))
-    }
-}
-
 pub trait LanceDbDatagenExt {
    fn into_ldb_stream(
        self,
@@ -264,9 +224,7 @@ impl IntoPolars for SendableRecordBatchStream {
 #[cfg(all(test, feature = "polars"))]
 mod tests {
    use super::SendableRecordBatchStream;
-    use crate::arrow::{
-        IntoArrow, IntoPolars, PolarsDataFrameRecordBatchReader, SimpleRecordBatchStream,
-    };
+    use crate::arrow::{IntoPolars, PolarsDataFrameRecordBatchReader, SimpleRecordBatchStream};
    use polars::prelude::{DataFrame, NamedFrom, Series};

    fn get_record_batch_reader_from_polars() -> Box<dyn arrow_array::RecordBatchReader + Send> {
@@ -280,10 +238,7 @@ mod tests {
        float_series = Series::new("float", &[2.0]);
        let df2 = DataFrame::new(vec![string_series, int_series, float_series]).unwrap();

-        PolarsDataFrameRecordBatchReader::new(df1.vstack(&df2).unwrap())
-            .unwrap()
-            .into_arrow()
-            .unwrap()
+        Box::new(PolarsDataFrameRecordBatchReader::new(df1.vstack(&df2).unwrap()).unwrap())
    }

    #[test]
--- a/rust/lancedb/src/data/scannable.rs
+++ b/rust/lancedb/src/data/scannable.rs
@@ -185,6 +185,43 @@ impl Scannable for SendableRecordBatchStream {
    }
 }

+#[cfg(feature = "polars")]
+impl Scannable for polars::frame::DataFrame {
+    fn schema(&self) -> SchemaRef {
+        crate::polars_arrow_convertors::convert_polars_df_schema_to_arrow_rb_schema(
+            self.schema().clone(),
+        )
+        .expect("failed to convert Polars DataFrame schema to Arrow schema")
+    }
+
+    fn scan_as_stream(&mut self) -> SendableRecordBatchStream {
+        let schema = Scannable::schema(self);
+        let batches: crate::Result<Vec<RecordBatch>> =
+            match crate::arrow::PolarsDataFrameRecordBatchReader::new(self.clone()) {
+                Err(e) => Err(e),
+                Ok(reader) => reader.map(|b| b.map_err(Into::into)).collect(),
+            };
+        match batches {
+            Err(e) => Box::pin(SimpleRecordBatchStream {
+                schema,
+                stream: once(async move { Err(e) }),
+            }),
+            Ok(batches) => {
+                let stream = futures::stream::iter(batches.into_iter().map(Ok));
+                Box::pin(SimpleRecordBatchStream { schema, stream })
+            }
+        }
+    }
+
+    fn num_rows(&self) -> Option<usize> {
+        Some(self.height())
+    }
+
+    fn rescannable(&self) -> bool {
+        true
+    }
+}
+
 #[async_trait]
 impl StreamingWriteSource for Box<dyn Scannable> {
    fn arrow_schema(&self) -> SchemaRef {
@@ -1089,4 +1126,60 @@ mod tests {
            );
        }
    }
+
+    #[cfg(feature = "polars")]
+    mod polars_tests {
+        use super::*;
+        use crate::arrow::IntoPolars;
+        use crate::query::ExecutableQuery;
+        use polars::prelude::{DataFrame, NamedFrom, Series};
+
+        fn make_df() -> DataFrame {
+            DataFrame::new(vec![
+                Series::new("id", &[1i32, 2, 3]),
+                Series::new("val", &[1.1f64, 2.2, 3.3]),
+            ])
+            .unwrap()
+        }
+
+        #[tokio::test]
+        async fn test_dataframe_scannable_round_trip() {
+            let tmp = tempfile::tempdir().unwrap();
+            let db = crate::connect(tmp.path().to_str().unwrap())
+                .execute()
+                .await
+                .unwrap();
+
+            let df = make_df();
+            let table = db.create_table("t", df.clone()).execute().await.unwrap();
+
+            // Append the same rows again.
+            table.add(df.clone()).execute().await.unwrap();
+
+            let result = table
+                .query()
+                .execute()
+                .await
+                .unwrap()
+                .into_polars()
+                .await
+                .unwrap();
+
+            assert_eq!(result.height(), df.height() * 2);
+            assert_eq!(result.schema(), df.schema());
+        }
+
+        #[tokio::test]
+        async fn test_dataframe_scannable_rescannable() {
+            let mut df = make_df();
+            assert!(df.rescannable());
+
+            let batches1: Vec<RecordBatch> = df.scan_as_stream().try_collect().await.unwrap();
+            assert_eq!(batches1.iter().map(|b| b.num_rows()).sum::<usize>(), 3);
+
+            // Can be scanned again.
+            let batches2: Vec<RecordBatch> = df.scan_as_stream().try_collect().await.unwrap();
+            assert_eq!(batches2.iter().map(|b| b.num_rows()).sum::<usize>(), 3);
+        }
+    }
 }
--- a/rust/lancedb/src/remote/table.rs
+++ b/rust/lancedb/src/remote/table.rs
@@ -70,18 +70,29 @@ use tokio::sync::RwLock;
 const REQUEST_TIMEOUT_HEADER: HeaderName = HeaderName::from_static("x-request-timeout-ms");
 const MIN_VERSION_HEADER: HeaderName = HeaderName::from_static("x-lancedb-min-version");
 const MIN_TIMESTAMP_HEADER: HeaderName = HeaderName::from_static("x-lancedb-min-timestamp");
+const MIN_READ_VERSION_HEADER: HeaderName = HeaderName::from_static("x-lancedb-min-read-version");
+const VERSION_HEADER: HeaderName = HeaderName::from_static("x-lancedb-version");
 const METRIC_TYPE_KEY: &str = "metric_type";
 const INDEX_TYPE_KEY: &str = "index_type";
 const SCHEMA_CACHE_TTL: Duration = Duration::from_secs(30);
 const SCHEMA_CACHE_REFRESH_WINDOW: Duration = Duration::from_secs(5);

-/// Per-table state driving the freshness headers (`x-lancedb-min-version` and
-/// `x-lancedb-min-timestamp`) sent on read requests.
+/// Per-table state driving the freshness headers (`x-lancedb-min-version`,
+/// `x-lancedb-min-timestamp`, and `x-lancedb-min-read-version`) sent on read
+/// requests.
 #[derive(Debug, Default, Clone, Copy)]
 struct FreshnessState {
    /// Provides read-your-write within a single handle: writes that return a
    /// version update this, and reads send it as `x-lancedb-min-version`.
    min_version: Option<u64>,
+    /// Highest dataset version observed in a *read* response on this handle.
+    /// Reads send it as `x-lancedb-min-read-version` so a load-balanced query
+    /// node whose cache is behind this version must refresh before serving,
+    /// giving monotonic reads across nodes regardless of which one the load
+    /// balancer routes to. Sourced only from reads (always committed dataset
+    /// versions), never from writes (which may return WAL entry ids), so it is
+    /// unaffected by the WAL/version mismatch that retired `min_version`.
+    min_read_version: Option<u64>,
    /// Wall-clock time captured at the last [`BaseTable::checkout_latest`]
    /// call. Subsequent reads send
    /// `max(baseline, now - read_consistency_interval)` as
@@ -102,6 +113,7 @@ struct FreshnessState {
 struct FreshnessHeaders {
    min_version: Option<u64>,
    min_timestamp: Option<SystemTime>,
+    min_read_version: Option<u64>,
 }

 impl FreshnessHeaders {
@@ -113,6 +125,9 @@ impl FreshnessHeaders {
            let dt: chrono::DateTime<chrono::Utc> = ts.into();
            request = request.header(MIN_TIMESTAMP_HEADER, dt.to_rfc3339());
        }
+        if let Some(v) = self.min_read_version {
+            request = request.header(MIN_READ_VERSION_HEADER, v.to_string());
+        }
        request
    }
 }
@@ -884,6 +899,7 @@ impl<S: HttpSend> RemoteTable<S> {
                self.client.read_consistency_interval,
                SystemTime::now(),
            ),
+            min_read_version: state.min_read_version,
        }
    }

@@ -905,6 +921,30 @@ impl<S: HttpSend> RemoteTable<S> {
        state.min_version = Some(state.min_version.map_or(version, |v| v.max(version)));
    }

+    /// Record a dataset version observed in a *read* response so subsequent
+    /// reads request at least this version via `x-lancedb-min-read-version`,
+    /// giving monotonic reads across load-balanced query nodes. A returned `0`
+    /// (or absent header from an old server) is ignored.
+    fn track_read_version(&self, version: u64) {
+        if version == 0 {
+            return;
+        }
+        let mut state = self.freshness.lock().unwrap();
+        state.min_read_version = Some(state.min_read_version.map_or(version, |v| v.max(version)));
+    }
+
+    /// Parse the `x-lancedb-version` response header (the dataset version a read
+    /// reflects) and fold it into the read-version watermark.
+    fn track_read_version_from_headers(&self, headers: &reqwest::header::HeaderMap) {
+        if let Some(version) = headers
+            .get(&VERSION_HEADER)
+            .and_then(|value| value.to_str().ok())
+            .and_then(|value| value.parse::<u64>().ok())
+        {
+            self.track_read_version(version);
+        }
+    }
+
    async fn execute_query(
        &self,
        query: &AnyQuery,
@@ -928,6 +968,7 @@ impl<S: HttpSend> RemoteTable<S> {

        let futures = requests.into_iter().map(|req| async move {
            let (request_id, response) = self.send(req, true).await?;
+            self.track_read_version_from_headers(response.headers());
            self.read_arrow_stream(&request_id, response).await
        });
        let streams = futures::future::try_join_all(futures);
@@ -1545,11 +1586,12 @@ impl<S: HttpSend> BaseTable for RemoteTable<S> {
        *write_guard = None;
        drop(write_guard);

-        // Drop any per-handle write tracking; subsequent reads use the
+        // Drop any per-handle read/write tracking; subsequent reads use the
        // baseline timestamp captured now to guarantee freshness.
        *self.freshness.lock().unwrap() = FreshnessState {
            min_version: None,
            checkout_baseline: Some(SystemTime::now()),
+            min_read_version: None,
        };

        // Invalidate schema cache since we're switching versions
@@ -1805,6 +1847,7 @@ impl<S: HttpSend> BaseTable for RemoteTable<S> {
            }
        };

+        self.track_read_version_from_headers(response.headers());
        let body = response.text().await.err_to_http(request_id.clone())?;

        serde_json::from_str(&body).map_err(|e| Error::Http {
@@ -7124,6 +7167,7 @@ mod tests {
        let state = FreshnessState {
            min_version: None,
            checkout_baseline: Some(baseline),
+            min_read_version: None,
        };
        assert_eq!(compute_min_timestamp(&state, None, now), Some(baseline));

@@ -7148,6 +7192,7 @@ mod tests {
        let state = FreshnessState {
            min_version: None,
            checkout_baseline: Some(baseline),
+            min_read_version: None,
        };
        assert_eq!(
            compute_min_timestamp(&state, Some(Duration::from_secs(10)), now),
@@ -7159,6 +7204,7 @@ mod tests {
        let state = FreshnessState {
            min_version: None,
            checkout_baseline: Some(recent_baseline),
+            min_read_version: None,
        };
        assert_eq!(
            compute_min_timestamp(&state, Some(Duration::from_secs(60)), now),
@@ -7303,6 +7349,106 @@ mod tests {
        );
    }

+    /// A handler that records every request's headers and answers each read with
+    /// an `x-lancedb-version` response header taken from `versions` (by call
+    /// index, saturating at the last entry). An empty string means "no header".
+    fn read_version_handler(
+        versions: &'static [&'static str],
+    ) -> (
+        impl Fn(reqwest::Request) -> http::Response<String> + Clone + Send + Sync + 'static,
+        Arc<std::sync::Mutex<Vec<http::HeaderMap>>>,
+    ) {
+        let requests = Arc::new(std::sync::Mutex::new(Vec::new()));
+        let requests_c = requests.clone();
+        let call = Arc::new(AtomicUsize::new(0));
+        let handler = move |request: reqwest::Request| {
+            requests_c.lock().unwrap().push(request.headers().clone());
+            let i = call.fetch_add(1, Ordering::SeqCst).min(versions.len() - 1);
+            let mut builder = http::Response::builder().status(200);
+            if !versions[i].is_empty() {
+                builder = builder.header("x-lancedb-version", versions[i]);
+            }
+            builder.body("42".to_string()).unwrap()
+        };
+        (handler, requests)
+    }
+
+    #[tokio::test]
+    async fn test_read_version_watermark_tracked_and_sent() {
+        let (handler, requests) = read_version_handler(&["100", "100"]);
+        let table = Table::new_with_handler("my_table", handler);
+
+        // First read has no watermark yet; the response advertises version 100,
+        // so the second read must floor the server at 100.
+        table.count_rows(None).await.unwrap();
+        table.count_rows(None).await.unwrap();
+
+        let reqs = requests.lock().unwrap();
+        assert!(!reqs[0].contains_key("x-lancedb-min-read-version"));
+        assert_eq!(
+            reqs[1]
+                .get("x-lancedb-min-read-version")
+                .unwrap()
+                .to_str()
+                .unwrap(),
+            "100"
+        );
+    }
+
+    #[tokio::test]
+    async fn test_read_version_watermark_keeps_max() {
+        // Server reports 100 then a stale 50; the watermark must not regress.
+        let (handler, requests) = read_version_handler(&["100", "50", "50"]);
+        let table = Table::new_with_handler("my_table", handler);
+
+        table.count_rows(None).await.unwrap();
+        table.count_rows(None).await.unwrap();
+        table.count_rows(None).await.unwrap();
+
+        let reqs = requests.lock().unwrap();
+        assert_eq!(
+            reqs[2]
+                .get("x-lancedb-min-read-version")
+                .unwrap()
+                .to_str()
+                .unwrap(),
+            "100"
+        );
+    }
+
+    #[tokio::test]
+    async fn test_read_version_absent_header_no_watermark() {
+        // An old server that doesn't return the version header leaves the
+        // watermark unset, preserving backward compatibility.
+        let (handler, requests) = read_version_handler(&[""]);
+        let table = Table::new_with_handler("my_table", handler);
+
+        table.count_rows(None).await.unwrap();
+        table.count_rows(None).await.unwrap();
+
+        let reqs = requests.lock().unwrap();
+        assert!(!reqs[1].contains_key("x-lancedb-min-read-version"));
+    }
+
+    #[tokio::test]
+    async fn test_read_version_watermark_reset_on_checkout_latest() {
+        let (handler, requests) = read_version_handler(&["100", "100"]);
+        let table = Table::new_with_handler("my_table", handler);
+
+        table.count_rows(None).await.unwrap();
+        table.checkout_latest().await.unwrap();
+        table.count_rows(None).await.unwrap();
+
+        // The read after checkout_latest starts from a clean slate.
+        let reqs = requests.lock().unwrap();
+        assert!(
+            !reqs
+                .last()
+                .unwrap()
+                .contains_key("x-lancedb-min-read-version")
+        );
+    }
+
    /// Like `capturing_handler`, but keeps a per-path snapshot of the headers
    /// from every request so tests can assert on a specific endpoint.
    #[allow(clippy::type_complexity)]