feat: connection pool for sync client

BREAKING-CHANGE: change Pydantic Vector field to be nullable by default.
Closes #1577

.bumpversion.toml

@@ -1,5 +1,5 @@
 [tool.bumpversion]
-current_version = "0.13.0"
+current_version = "0.13.1-beta.0"
 parse = """(?x)
     (?P<major>0|[1-9]\\d*)\\.
     (?P<minor>0|[1-9]\\d*)\\.
@@ -87,6 +87,16 @@ glob = "node/package.json"
 replace = "\"@lancedb/vectordb-linux-x64-gnu\": \"{new_version}\""
 search = "\"@lancedb/vectordb-linux-x64-gnu\": \"{current_version}\""
 
+[[tool.bumpversion.files]]
+glob = "node/package.json"
+replace = "\"@lancedb/vectordb-linux-arm64-musl\": \"{new_version}\""
+search = "\"@lancedb/vectordb-linux-arm64-musl\": \"{current_version}\""
+
+[[tool.bumpversion.files]]
+glob = "node/package.json"
+replace = "\"@lancedb/vectordb-linux-x64-musl\": \"{new_version}\""
+search = "\"@lancedb/vectordb-linux-x64-musl\": \"{current_version}\""
+
 [[tool.bumpversion.files]]
 glob = "node/package.json"
 replace = "\"@lancedb/vectordb-win32-x64-msvc\": \"{new_version}\""

.cargo/config.toml

@@ -31,6 +31,9 @@ rustflags = [
 [target.x86_64-unknown-linux-gnu]
 rustflags = ["-C", "target-cpu=haswell", "-C", "target-feature=+avx2,+fma,+f16c"]
 
+[target.x86_64-unknown-linux-musl]
+rustflags = ["-C", "target-cpu=haswell", "-C", "target-feature=-crt-static,+avx2,+fma,+f16c"]
+
 [target.aarch64-apple-darwin]
 rustflags = ["-C", "target-cpu=apple-m1", "-C", "target-feature=+neon,+fp16,+fhm,+dotprod"]
 

.github/workflows/npm-publish.yml

@@ -101,7 +101,7 @@ jobs:
           path: |
             nodejs/dist/*.node
 
-  node-linux:
+  node-linux-gnu:
     name: vectordb (${{ matrix.config.arch}}-unknown-linux-gnu)
     runs-on: ${{ matrix.config.runner }}
     # Only runs on tags that matches the make-release action
@@ -137,11 +137,63 @@ jobs:
       - name: Upload Linux Artifacts
         uses: actions/upload-artifact@v4
         with:
-          name: node-native-linux-${{ matrix.config.arch }}
+          name: node-native-linux-${{ matrix.config.arch }}-gnu
           path: |
             node/dist/lancedb-vectordb-linux*.tgz
 
-  nodejs-linux:
+  node-linux-musl:
+    name: vectordb (${{ matrix.config.arch}}-unknown-linux-musl)
+    runs-on: ubuntu-latest
+    container: alpine:edge
+    # Only runs on tags that matches the make-release action
+    if: startsWith(github.ref, 'refs/tags/v')
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+          - arch: x86_64
+          - arch: aarch64
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install common dependencies
+        run: |
+          apk add protobuf-dev curl clang mold grep npm bash
+          curl --proto '=https' --tlsv1.3 -sSf https://raw.githubusercontent.com/rust-lang/rustup/refs/heads/master/rustup-init.sh | sh -s -- -y --default-toolchain 1.80.0
+          echo "source $HOME/.cargo/env" >> saved_env
+          echo "export CC=clang" >> saved_env
+          echo "export RUSTFLAGS='-Ctarget-cpu=haswell -Ctarget-feature=-crt-static,+avx2,+fma,+f16c -Clinker=clang -Clink-arg=-fuse-ld=mold'" >> saved_env
+      - name: Configure aarch64 build
+        if: ${{ matrix.config.arch == 'aarch64' }}
+        run: |
+          source "$HOME/.cargo/env"
+          rustup target add aarch64-unknown-linux-musl --toolchain 1.80.0
+          crt=$(realpath $(dirname $(rustup which rustc))/../lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained)
+          sysroot_lib=/usr/aarch64-unknown-linux-musl/usr/lib
+          apk_url=https://dl-cdn.alpinelinux.org/alpine/latest-stable/main/aarch64/
+          curl -sSf $apk_url > apk_list
+          for pkg in gcc libgcc musl; do curl -sSf $apk_url$(cat apk_list | grep -oP '(?<=")'$pkg'-\d.*?(?=")') | tar zxf -; done
+          mkdir -p $sysroot_lib
+          echo 'GROUP ( libgcc_s.so.1 -lgcc )' > $sysroot_lib/libgcc_s.so
+          cp usr/lib/libgcc_s.so.1 $sysroot_lib
+          cp usr/lib/gcc/aarch64-alpine-linux-musl/*/libgcc.a $sysroot_lib
+          cp lib/ld-musl-aarch64.so.1 $sysroot_lib/libc.so
+          echo '!<arch>' > $sysroot_lib/libdl.a
+          (cd $crt && cp crti.o crtbeginS.o crtendS.o crtn.o -t $sysroot_lib)
+          echo "export CARGO_BUILD_TARGET=aarch64-unknown-linux-musl" >> saved_env
+          echo "export RUSTFLAGS='-Ctarget-cpu=apple-m1 -Ctarget-feature=-crt-static,+neon,+fp16,+fhm,+dotprod -Clinker=clang -Clink-arg=-fuse-ld=mold -Clink-arg=--target=aarch64-unknown-linux-musl -Clink-arg=--sysroot=/usr/aarch64-unknown-linux-musl -Clink-arg=-lc'" >> saved_env
+      - name: Build Linux Artifacts
+        run: |
+          source ./saved_env
+          bash ci/manylinux_node/build_vectordb.sh ${{ matrix.config.arch }}
+      - name: Upload Linux Artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: node-native-linux-${{ matrix.config.arch }}-musl
+          path: |
+            node/dist/lancedb-vectordb-linux*.tgz
+
+  nodejs-linux-gnu:
     name: lancedb (${{ matrix.config.arch}}-unknown-linux-gnu
     runs-on: ${{ matrix.config.runner }}
     # Only runs on tags that matches the make-release action
@@ -178,7 +230,7 @@ jobs:
       - name: Upload Linux Artifacts
         uses: actions/upload-artifact@v4
         with:
-          name: nodejs-native-linux-${{ matrix.config.arch }}
+          name: nodejs-native-linux-${{ matrix.config.arch }}-gnu
           path: |
             nodejs/dist/*.node
       # The generic files are the same in all distros so we just pick
@@ -192,6 +244,62 @@ jobs:
             nodejs/dist/*
             !nodejs/dist/*.node
 
+  nodejs-linux-musl:
+    name: lancedb (${{ matrix.config.arch}}-unknown-linux-musl
+    runs-on: ubuntu-latest
+    container: alpine:edge
+    # Only runs on tags that matches the make-release action
+    if: startsWith(github.ref, 'refs/tags/v')
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+          - arch: x86_64
+          - arch: aarch64
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install common dependencies
+        run: |
+          apk add protobuf-dev curl clang mold grep npm bash openssl-dev openssl-libs-static
+          curl --proto '=https' --tlsv1.3 -sSf https://raw.githubusercontent.com/rust-lang/rustup/refs/heads/master/rustup-init.sh | sh -s -- -y --default-toolchain 1.80.0
+          echo "source $HOME/.cargo/env" >> saved_env
+          echo "export CC=clang" >> saved_env
+          echo "export RUSTFLAGS='-Ctarget-cpu=haswell -Ctarget-feature=-crt-static,+avx2,+fma,+f16c -Clinker=clang -Clink-arg=-fuse-ld=mold'" >> saved_env
+          echo "export X86_64_UNKNOWN_LINUX_MUSL_OPENSSL_INCLUDE_DIR=/usr/include" >> saved_env
+          echo "export X86_64_UNKNOWN_LINUX_MUSL_OPENSSL_LIB_DIR=/usr/lib" >> saved_env
+      - name: Configure aarch64 build
+        if: ${{ matrix.config.arch == 'aarch64' }}
+        run: |
+          source "$HOME/.cargo/env"
+          rustup target add aarch64-unknown-linux-musl --toolchain 1.80.0
+          crt=$(realpath $(dirname $(rustup which rustc))/../lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained)
+          sysroot_lib=/usr/aarch64-unknown-linux-musl/usr/lib
+          apk_url=https://dl-cdn.alpinelinux.org/alpine/latest-stable/main/aarch64/
+          curl -sSf $apk_url > apk_list
+          for pkg in gcc libgcc musl openssl-dev openssl-libs-static; do curl -sSf $apk_url$(cat apk_list | grep -oP '(?<=")'$pkg'-\d.*?(?=")') | tar zxf -; done
+          mkdir -p $sysroot_lib
+          echo 'GROUP ( libgcc_s.so.1 -lgcc )' > $sysroot_lib/libgcc_s.so
+          cp usr/lib/libgcc_s.so.1 $sysroot_lib
+          cp usr/lib/gcc/aarch64-alpine-linux-musl/*/libgcc.a $sysroot_lib
+          cp lib/ld-musl-aarch64.so.1 $sysroot_lib/libc.so
+          echo '!<arch>' > $sysroot_lib/libdl.a
+          (cd $crt && cp crti.o crtbeginS.o crtendS.o crtn.o -t $sysroot_lib)
+          echo "export CARGO_BUILD_TARGET=aarch64-unknown-linux-musl" >> saved_env
+          echo "export RUSTFLAGS='-Ctarget-feature=-crt-static,+neon,+fp16,+fhm,+dotprod -Clinker=clang -Clink-arg=-fuse-ld=mold -Clink-arg=--target=aarch64-unknown-linux-musl -Clink-arg=--sysroot=/usr/aarch64-unknown-linux-musl -Clink-arg=-lc'" >> saved_env
+          echo "export AARCH64_UNKNOWN_LINUX_MUSL_OPENSSL_INCLUDE_DIR=$(realpath usr/include)" >> saved_env
+          echo "export AARCH64_UNKNOWN_LINUX_MUSL_OPENSSL_LIB_DIR=$(realpath usr/lib)" >> saved_env
+      - name: Build Linux Artifacts
+        run: |
+          source ./saved_env
+          bash ci/manylinux_node/build_lancedb.sh ${{ matrix.config.arch }}
+      - name: Upload Linux Artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: nodejs-native-linux-${{ matrix.config.arch }}-musl
+          path: |
+            nodejs/dist/*.node
+
   node-windows:
     name: vectordb ${{ matrix.target }}
     runs-on: windows-2022
@@ -460,7 +568,7 @@ jobs:
 
   release:
     name: vectordb NPM Publish
-    needs: [node, node-macos, node-linux, node-windows]
+    needs: [node, node-macos, node-linux-gnu, node-linux-musl, node-windows]
     runs-on: ubuntu-latest
     # Only runs on tags that matches the make-release action
     if: startsWith(github.ref, 'refs/tags/v')
@@ -500,7 +608,7 @@ jobs:
 
   release-nodejs:
     name: lancedb NPM Publish
-    needs: [nodejs-macos, nodejs-linux, nodejs-windows]
+    needs: [nodejs-macos, nodejs-linux-gnu, nodejs-linux-musl, nodejs-windows]
     runs-on: ubuntu-latest
     # Only runs on tags that matches the make-release action
     if: startsWith(github.ref, 'refs/tags/v')

Cargo.toml

@@ -21,15 +21,15 @@ categories = ["database-implementations"]
 rust-version = "1.80.0"                                                     # TODO: lower this once we upgrade Lance again.
 
 [workspace.dependencies]
-lance = { "version" = "=0.19.3", "features" = [
+lance = { "version" = "=0.20.0", "features" = [
     "dynamodb",
-], git = "https://github.com/lancedb/lance.git", tag = "v0.19.3-beta.1" }
+], git = "https://github.com/lancedb/lance.git", tag = "v0.20.0-beta.2" }
-lance-index = { version = "=0.19.3", git = "https://github.com/lancedb/lance.git", tag = "v0.19.3-beta.1" }
+lance-index = { version = "=0.20.0", git = "https://github.com/lancedb/lance.git", tag = "v0.20.0-beta.2" }
-lance-linalg = { version = "=0.19.3", git = "https://github.com/lancedb/lance.git", tag = "v0.19.3-beta.1" }
+lance-linalg = { version = "=0.20.0", git = "https://github.com/lancedb/lance.git", tag = "v0.20.0-beta.2" }
-lance-table = { version = "=0.19.3", git = "https://github.com/lancedb/lance.git", tag = "v0.19.3-beta.1" }
+lance-table = { version = "=0.20.0", git = "https://github.com/lancedb/lance.git", tag = "v0.20.0-beta.2" }
-lance-testing = { version = "=0.19.3", git = "https://github.com/lancedb/lance.git", tag = "v0.19.3-beta.1" }
+lance-testing = { version = "=0.20.0", git = "https://github.com/lancedb/lance.git", tag = "v0.20.0-beta.2" }
-lance-datafusion = { version = "=0.19.3", git = "https://github.com/lancedb/lance.git", tag = "v0.19.3-beta.1" }
+lance-datafusion = { version = "=0.20.0", git = "https://github.com/lancedb/lance.git", tag = "v0.20.0-beta.2" }
-lance-encoding = { version = "=0.19.3", git = "https://github.com/lancedb/lance.git", tag = "v0.19.3-beta.1" }
+lance-encoding = { version = "=0.20.0", git = "https://github.com/lancedb/lance.git", tag = "v0.20.0-beta.2" }
 # Note that this one does not include pyarrow
 arrow = { version = "52.2", optional = false }
 arrow-array = "52.2"

ci/manylinux_node/build_lancedb.sh

@@ -11,7 +11,8 @@ fi
 export OPENSSL_STATIC=1
 export OPENSSL_INCLUDE_DIR=/usr/local/include/openssl
 
-source $HOME/.bashrc
+#Alpine doesn't have .bashrc
+FILE=$HOME/.bashrc && test -f $FILE && source $FILE
 
 cd nodejs
 npm ci

ci/manylinux_node/build_vectordb.sh

@@ -5,13 +5,14 @@ ARCH=${1:-x86_64}
 
 if [ "$ARCH" = "x86_64" ]; then
     export OPENSSL_LIB_DIR=/usr/local/lib64/
-else 
+else
     export OPENSSL_LIB_DIR=/usr/local/lib/
 fi
 export OPENSSL_STATIC=1
 export OPENSSL_INCLUDE_DIR=/usr/local/include/openssl
 
-source $HOME/.bashrc
+#Alpine doesn't have .bashrc
+FILE=$HOME/.bashrc && test -f $FILE && source $FILE
 
 cd node
 npm ci

docs/mkdocs.yml

@@ -138,6 +138,7 @@ nav:
               - Jina Reranker: reranking/jina.md
               - OpenAI Reranker: reranking/openai.md
               - AnswerDotAi Rerankers: reranking/answerdotai.md
+              - Voyage AI Rerankers: reranking/voyageai.md
               - Building Custom Rerankers: reranking/custom_reranker.md
               - Example: notebooks/lancedb_reranking.ipynb
           - Filtering: sql.md
@@ -165,6 +166,7 @@ nav:
                   - Jina Embeddings: embeddings/available_embedding_models/text_embedding_functions/jina_embedding.md
                   - AWS Bedrock Text Embedding Functions: embeddings/available_embedding_models/text_embedding_functions/aws_bedrock_embedding.md
                   - IBM watsonx.ai Embeddings: embeddings/available_embedding_models/text_embedding_functions/ibm_watsonx_ai_embedding.md
+                  - Voyage AI Embeddings: embeddings/available_embedding_models/text_embedding_functions/voyageai_embedding.md
               - Multimodal Embedding Functions:
                   - OpenClip embeddings: embeddings/available_embedding_models/multimodal_embedding_functions/openclip_embedding.md
                   - Imagebind embeddings: embeddings/available_embedding_models/multimodal_embedding_functions/imagebind_embedding.md

docs/src/ann_indexes.md

@@ -277,7 +277,15 @@ Product quantization can lead to approximately `16 * sizeof(float32) / 1 = 64` t
 Higher number of partitions could lead to more efficient I/O during queries and better accuracy, but it takes much more time to train.
 On `SIFT-1M` dataset, our benchmark shows that keeping each partition 1K-4K rows lead to a good latency / recall.
 
-`num_sub_vectors` specifies how many Product Quantization (PQ) short codes to generate on each vector. Because
+`num_sub_vectors` specifies how many Product Quantization (PQ) short codes to generate on each vector. The number should be a factor of the vector dimension. Because
 PQ is a lossy compression of the original vector, a higher `num_sub_vectors` usually results in
-less space distortion, and thus yields better accuracy. However, a higher `num_sub_vectors` also causes heavier I/O and
+less space distortion, and thus yields better accuracy. However, a higher `num_sub_vectors` also causes heavier I/O and more PQ computation, and thus, higher latency. `dimension / num_sub_vectors` should be a multiple of 8 for optimum SIMD efficiency.
-more PQ computation, and thus, higher latency. `dimension / num_sub_vectors` should be a multiple of 8 for optimum SIMD efficiency.
+
+!!! note
+    if `num_sub_vectors` is set to be greater than the vector dimension, you will see errors like `attempt to divide by zero`
+
+### How to choose `m` and `ef_construction` for `IVF_HNSW_*` index?
+
+`m` determines the number of connections a new node establishes with its closest neighbors upon entering the graph. Typically, `m` falls within the range of 5 to 48. Lower `m` values are suitable for low-dimensional data or scenarios where recall is less critical. Conversely, higher `m` values are beneficial for high-dimensional data or when high recall is required. In essence, a larger `m` results in a denser graph with increased connectivity, but at the expense of higher memory consumption.
+
+`ef_construction` balances build speed and accuracy. Higher values increase accuracy but slow down the build process. A typical range is 150 to 300. For good search results, a minimum value of 100 is recommended. In most cases, setting this value above 500 offers no additional benefit. Ensure that `ef_construction` is always set to a value equal to or greater than `ef` in the search phase

docs/src/concepts/index_hnsw.md

@@ -57,6 +57,13 @@ Then the greedy search routine operates as follows:
 
 ## Usage
 
+There are three key parameters to set when constructing an HNSW index:
+
+* `metric`: Use an `L2` euclidean distance metric. We also support `dot` and `cosine` distance.
+* `m`: The number of neighbors to select for each vector in the HNSW graph.
+* `ef_construction`: The number of candidates to evaluate during the construction of the HNSW graph.
+
+
 We can combine the above concepts to understand how to build and query an HNSW index in LanceDB.
 
 ### Construct index

docs/src/concepts/index_ivfpq.md

@@ -58,8 +58,10 @@ In Python, the index can be created as follows:
 # Make sure you have enough data in the table for an effective training step
 tbl.create_index(metric="L2", num_partitions=256, num_sub_vectors=96)
 ```
+!!! note
+    `num_partitions`=256 and `num_sub_vectors`=96 does not work for every dataset. Those values needs to be adjusted for your particular dataset.
 
-The `num_partitions` is usually chosen to target a particular number of vectors per partition. `num_sub_vectors` is typically chosen based on the desired recall and the dimensionality of the vector. See the [FAQs](#faq) below for best practices on choosing these parameters.
+The `num_partitions` is usually chosen to target a particular number of vectors per partition. `num_sub_vectors` is typically chosen based on the desired recall and the dimensionality of the vector. See [here](../ann_indexes.md/#how-to-choose-num_partitions-and-num_sub_vectors-for-ivf_pq-index) for best practices on choosing these parameters.
 
 
 ### Query the index

docs/src/fts.md

@@ -114,12 +114,45 @@ table.create_fts_index("text",
 
 LanceDB full text search supports to filter the search results by a condition, both pre-filtering and post-filtering are supported.
 
-This can be invoked via the familiar `where` syntax:
+This can be invoked via the familiar `where` syntax.
-
+ 
+With pre-filtering:
 === "Python"
 
     ```python
-    table.search("puppy").limit(10).where("meta='foo'").to_list()
+    table.search("puppy").limit(10).where("meta='foo'", prefilte=True).to_list()
+    ```
+
+=== "TypeScript"
+
+    ```typescript
+    await tbl
+    .search("puppy")
+    .select(["id", "doc"])
+    .limit(10)
+    .where("meta='foo'")
+    .prefilter(true)
+    .toArray();
+    ```
+
+=== "Rust"
+
+    ```rust
+    table
+        .query()
+        .full_text_search(FullTextSearchQuery::new("puppy".to_owned()))
+        .select(lancedb::query::Select::Columns(vec!["doc".to_owned()]))
+        .limit(10)
+        .only_if("meta='foo'")
+        .execute()
+        .await?;
+    ```
+
+With post-filtering:
+=== "Python"
+
+    ```python
+    table.search("puppy").limit(10).where("meta='foo'", prefilte=False).to_list()
     ```
 
 === "TypeScript"
@@ -130,6 +163,7 @@ This can be invoked via the familiar `where` syntax:
     .select(["id", "doc"])
     .limit(10)
     .where("meta='foo'")
+    .prefilter(false)
     .toArray();
     ```
 
@@ -140,6 +174,7 @@ This can be invoked via the familiar `where` syntax:
         .query()
         .full_text_search(FullTextSearchQuery::new(words[0].to_owned()))
         .select(lancedb::query::Select::Columns(vec!["doc".to_owned()]))
+        .postfilter()
         .limit(10)
         .only_if("meta='foo'")
         .execute()
@@ -189,3 +224,6 @@ This can make the query more efficient, especially when the table is large and t
     tbl.add(more_data).execute().await?;
     tbl.optimize(OptimizeAction::All).execute().await?;
     ```
+!!! note
+
+    New data added after creating the FTS index will appear in search results while incremental index is still progress, but with increased latency due to a flat search on the unindexed portion. LanceDB Cloud automates this merging process, minimizing the impact on search speed. 

docs/src/fts_tantivy.md

@@ -153,9 +153,7 @@ table.create_fts_index(["title", "content"], use_tantivy=True, writer_heap_size=
 
 ## Current limitations
 
-1. Currently we do not yet support incremental writes.
+1. New data added after creating the FTS index will appear in search results, but with increased latency due to a flat search on the unindexed portion. Re-indexing with `create_fts_index` will reduce latency. LanceDB Cloud automates this merging process, minimizing the impact on search speed. 
-   If you add data after FTS index creation, it won't be reflected
-   in search results until you do a full reindex.
 
 2. We currently only support local filesystem paths for the FTS index.
    This is a tantivy limitation. We've implemented an object store plugin

docs/src/reranking/cohere.md

@@ -6,6 +6,9 @@ This re-ranker uses the [Cohere](https://cohere.ai/) API to rerank the search re
 !!! note
     Supported Query Types: Hybrid, Vector, FTS
 
+```shell
+pip install cohere
+```
 
 ```python
 import numpy

java/core/pom.xml

@@ -8,7 +8,7 @@
     <parent>
         <groupId>com.lancedb</groupId>
         <artifactId>lancedb-parent</artifactId>
-        <version>0.13.0-final.0</version>
+        <version>0.13.1-beta.0</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 

java/pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.lancedb</groupId>
     <artifactId>lancedb-parent</artifactId>
-    <version>0.13.0-final.0</version>
+    <version>0.13.1-beta.0</version>
     <packaging>pom</packaging>
 
     <name>LanceDB Parent</name>

node/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "vectordb",
-  "version": "0.13.0",
+  "version": "0.13.1-beta.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "vectordb",
-      "version": "0.13.0",
+      "version": "0.13.1-beta.0",
       "cpu": [
         "x64",
         "arm64"
@@ -52,12 +52,14 @@
         "uuid": "^9.0.0"
       },
       "optionalDependencies": {
-        "@lancedb/vectordb-darwin-arm64": "0.13.0",
+        "@lancedb/vectordb-darwin-arm64": "0.13.1-beta.0",
-        "@lancedb/vectordb-darwin-x64": "0.13.0",
+        "@lancedb/vectordb-darwin-x64": "0.13.1-beta.0",
-        "@lancedb/vectordb-linux-arm64-gnu": "0.13.0",
+        "@lancedb/vectordb-linux-arm64-gnu": "0.13.1-beta.0",
-        "@lancedb/vectordb-linux-x64-gnu": "0.13.0",
+        "@lancedb/vectordb-linux-arm64-musl": "0.13.1-beta.0",
-        "@lancedb/vectordb-win32-arm64-msvc": "0.13.0",
+        "@lancedb/vectordb-linux-x64-gnu": "0.13.1-beta.0",
-        "@lancedb/vectordb-win32-x64-msvc": "0.13.0"
+        "@lancedb/vectordb-linux-x64-musl": "0.13.1-beta.0",
+        "@lancedb/vectordb-win32-arm64-msvc": "0.13.1-beta.0",
+        "@lancedb/vectordb-win32-x64-msvc": "0.13.1-beta.0"
       },
       "peerDependencies": {
         "@apache-arrow/ts": "^14.0.2",
@@ -327,66 +329,6 @@
         "@jridgewell/sourcemap-codec": "^1.4.10"
       }
     },
-    "node_modules/@lancedb/vectordb-darwin-arm64": {
-      "version": "0.13.0",
-      "resolved": "https://registry.npmjs.org/@lancedb/vectordb-darwin-arm64/-/vectordb-darwin-arm64-0.13.0.tgz",
-      "integrity": "sha512-8hdcjkRmgrdQYf1jN+DyZae40LIv8UUfnWy70Uid5qy63sSvRW/+MvIdqIPFr9QlLUXmpyyQuX0y3bZhUR99cQ==",
-      "cpu": [
-        "arm64"
-      ],
-      "optional": true,
-      "os": [
-        "darwin"
-      ]
-    },
-    "node_modules/@lancedb/vectordb-darwin-x64": {
-      "version": "0.13.0",
-      "resolved": "https://registry.npmjs.org/@lancedb/vectordb-darwin-x64/-/vectordb-darwin-x64-0.13.0.tgz",
-      "integrity": "sha512-fWzAY4l5SQtNfMYh80v+M66ugZHhdxbkpk5mNEv6Zsug3DL6kRj3Uv31/i0wgzY6F5G3LUlbjZerN+eTnDLwOw==",
-      "cpu": [
-        "x64"
-      ],
-      "optional": true,
-      "os": [
-        "darwin"
-      ]
-    },
-    "node_modules/@lancedb/vectordb-linux-arm64-gnu": {
-      "version": "0.13.0",
-      "resolved": "https://registry.npmjs.org/@lancedb/vectordb-linux-arm64-gnu/-/vectordb-linux-arm64-gnu-0.13.0.tgz",
-      "integrity": "sha512-ltwAT9baOSuR5YiGykQXPC8/HGYF13vpI47qxhP9yfgiz9pA8EUn8p8YrBRzq7J4DIZ4b8JSVDXQnMIqEtB4Kg==",
-      "cpu": [
-        "arm64"
-      ],
-      "optional": true,
-      "os": [
-        "linux"
-      ]
-    },
-    "node_modules/@lancedb/vectordb-linux-x64-gnu": {
-      "version": "0.13.0",
-      "resolved": "https://registry.npmjs.org/@lancedb/vectordb-linux-x64-gnu/-/vectordb-linux-x64-gnu-0.13.0.tgz",
-      "integrity": "sha512-MiT/RBlMPGGRh7BX+MXwRuNiiUnKmuDcHH8nm88IH28T7TQxXIbA9w6UpSg5m9f3DgKQI2K8oLi29oKIB8ZwDQ==",
-      "cpu": [
-        "x64"
-      ],
-      "optional": true,
-      "os": [
-        "linux"
-      ]
-    },
-    "node_modules/@lancedb/vectordb-win32-x64-msvc": {
-      "version": "0.13.0",
-      "resolved": "https://registry.npmjs.org/@lancedb/vectordb-win32-x64-msvc/-/vectordb-win32-x64-msvc-0.13.0.tgz",
-      "integrity": "sha512-SovP/hwWYLJIy65DKbVuXlBPTb/nwvVpTO6dh9zRch+L5ek6JmVAkwsfeTS2p5bMa8VPujsCXYUAVuCDEJU8wg==",
-      "cpu": [
-        "x64"
-      ],
-      "optional": true,
-      "os": [
-        "win32"
-      ]
-    },
     "node_modules/@neon-rs/cli": {
       "version": "0.0.160",
       "resolved": "https://registry.npmjs.org/@neon-rs/cli/-/cli-0.0.160.tgz",

node/package.json

@@ -1,6 +1,6 @@
 {
   "name": "vectordb",
-  "version": "0.13.0",
+  "version": "0.13.1-beta.0",
   "description": " Serverless, low-latency vector database for AI applications",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
@@ -84,16 +84,20 @@
       "aarch64-apple-darwin": "@lancedb/vectordb-darwin-arm64",
       "x86_64-unknown-linux-gnu": "@lancedb/vectordb-linux-x64-gnu",
       "aarch64-unknown-linux-gnu": "@lancedb/vectordb-linux-arm64-gnu",
+      "x86_64-unknown-linux-musl": "@lancedb/vectordb-linux-x64-musl",
+      "aarch64-unknown-linux-musl": "@lancedb/vectordb-linux-arm64-musl",
       "x86_64-pc-windows-msvc": "@lancedb/vectordb-win32-x64-msvc",
       "aarch64-pc-windows-msvc": "@lancedb/vectordb-win32-arm64-msvc"
     }
   },
   "optionalDependencies": {
-    "@lancedb/vectordb-darwin-arm64": "0.13.0",
+    "@lancedb/vectordb-darwin-x64": "0.13.1-beta.0",
-    "@lancedb/vectordb-darwin-x64": "0.13.0",
+    "@lancedb/vectordb-darwin-arm64": "0.13.1-beta.0",
-    "@lancedb/vectordb-linux-arm64-gnu": "0.13.0",
+    "@lancedb/vectordb-linux-x64-gnu": "0.13.1-beta.0",
-    "@lancedb/vectordb-linux-x64-gnu": "0.13.0",
+    "@lancedb/vectordb-linux-arm64-gnu": "0.13.1-beta.0",
-    "@lancedb/vectordb-win32-x64-msvc": "0.13.0",
+    "@lancedb/vectordb-linux-x64-musl": "0.13.1-beta.0",
-    "@lancedb/vectordb-win32-arm64-msvc": "0.13.0"
+    "@lancedb/vectordb-linux-arm64-musl": "0.13.1-beta.0",
+    "@lancedb/vectordb-win32-x64-msvc": "0.13.1-beta.0",
+    "@lancedb/vectordb-win32-arm64-msvc": "0.13.1-beta.0"
   }
 }

nodejs/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "lancedb-nodejs"
 edition.workspace = true
-version = "0.13.0"
+version = "0.13.1-beta.0"
 license.workspace = true
 description.workspace = true
 repository.workspace = true

nodejs/lancedb/table.ts

@@ -87,6 +87,12 @@ export interface OptimizeOptions {
   deleteUnverified: boolean;
 }
 
+export interface Version {
+  version: number;
+  timestamp: Date;
+  metadata: Record<string, string>;
+}
+
 /**
  * A Table is a collection of Records in a LanceDB Database.
  *
@@ -360,6 +366,11 @@ export abstract class Table {
    */
   abstract checkoutLatest(): Promise<void>;
 
+  /**
+   * List all the versions of the table
+   */
+  abstract listVersions(): Promise<Version[]>;
+
   /**
    * Restore the table to the currently checked out version
    *
@@ -659,6 +670,14 @@ export class LocalTable extends Table {
     await this.inner.checkoutLatest();
   }
 
+  async listVersions(): Promise<Version[]> {
+    return (await this.inner.listVersions()).map((version) => ({
+      version: version.version,
+      timestamp: new Date(version.timestamp / 1000),
+      metadata: version.metadata,
+    }));
+  }
+
   async restore(): Promise<void> {
     await this.inner.restore();
   }

nodejs/npm/darwin-arm64/package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@lancedb/lancedb-darwin-arm64",
-	"version": "0.13.0",
+	"version": "0.13.1-beta.0",
 	"os": ["darwin"],
 	"cpu": ["arm64"],
 	"main": "lancedb.darwin-arm64.node",

nodejs/npm/darwin-x64/package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@lancedb/lancedb-darwin-x64",
-	"version": "0.13.0",
+	"version": "0.13.1-beta.0",
 	"os": ["darwin"],
 	"cpu": ["x64"],
 	"main": "lancedb.darwin-x64.node",

nodejs/npm/linux-arm64-gnu/package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@lancedb/lancedb-linux-arm64-gnu",
-	"version": "0.13.0",
+	"version": "0.13.1-beta.0",
 	"os": ["linux"],
 	"cpu": ["arm64"],
 	"main": "lancedb.linux-arm64-gnu.node",

nodejs/npm/linux-arm64-musl/README.md

@@ -0,0 +1,3 @@
+# `@lancedb/lancedb-linux-arm64-musl`
+
+This is the **aarch64-unknown-linux-musl** binary for `@lancedb/lancedb`

nodejs/npm/linux-arm64-musl/package.json

@@ -0,0 +1,13 @@
+{
+	"name": "@lancedb/lancedb-linux-arm64-musl",
+	"version": "0.13.1-beta.0",
+	"os": ["linux"],
+	"cpu": ["arm64"],
+	"main": "lancedb.linux-arm64-musl.node",
+	"files": ["lancedb.linux-arm64-musl.node"],
+	"license": "Apache 2.0",
+	"engines": {
+		"node": ">= 18"
+	},
+	"libc": ["musl"]
+}

nodejs/npm/linux-x64-gnu/package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@lancedb/lancedb-linux-x64-gnu",
-	"version": "0.13.0",
+	"version": "0.13.1-beta.0",
 	"os": ["linux"],
 	"cpu": ["x64"],
 	"main": "lancedb.linux-x64-gnu.node",

nodejs/npm/linux-x64-musl/README.md

@@ -0,0 +1,3 @@
+# `@lancedb/lancedb-linux-x64-musl`
+
+This is the **x86_64-unknown-linux-musl** binary for `@lancedb/lancedb`

nodejs/npm/linux-x64-musl/package.json

@@ -0,0 +1,13 @@
+{
+	"name": "@lancedb/lancedb-linux-x64-musl",
+	"version": "0.13.1-beta.0",
+	"os": ["linux"],
+	"cpu": ["x64"],
+	"main": "lancedb.linux-x64-musl.node",
+	"files": ["lancedb.linux-x64-musl.node"],
+	"license": "Apache 2.0",
+	"engines": {
+		"node": ">= 18"
+	},
+	"libc": ["musl"]
+}

nodejs/npm/win32-arm64-msvc/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@lancedb/lancedb-win32-arm64-msvc",
-  "version": "0.13.0",
+  "version": "0.13.1-beta.0",
   "os": [
     "win32"
   ],

nodejs/npm/win32-x64-msvc/package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@lancedb/lancedb-win32-x64-msvc",
-	"version": "0.13.0",
+	"version": "0.13.1-beta.0",
 	"os": ["win32"],
 	"cpu": ["x64"],
 	"main": "lancedb.win32-x64-msvc.node",

nodejs/package.json

@@ -10,7 +10,7 @@
     "vector database",
     "ann"
   ],
-  "version": "0.13.0",
+  "version": "0.13.1-beta.0",
   "main": "dist/index.js",
   "exports": {
     ".": "./dist/index.js",
@@ -24,10 +24,12 @@
     "triples": {
       "defaults": false,
       "additional": [
-        "aarch64-apple-darwin",
-        "aarch64-unknown-linux-gnu",
         "x86_64-apple-darwin",
+        "aarch64-apple-darwin",
         "x86_64-unknown-linux-gnu",
+        "aarch64-unknown-linux-gnu",
+        "x86_64-unknown-linux-musl",
+        "aarch64-unknown-linux-musl",
         "x86_64-pc-windows-msvc"
       ]
     }

nodejs/src/table.rs

@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+use std::collections::HashMap;
+
 use arrow_ipc::writer::FileWriter;
 use lancedb::ipc::ipc_file_to_batches;
 use lancedb::table::{
@@ -226,6 +228,28 @@ impl Table {
         self.inner_ref()?.checkout_latest().await.default_error()
     }
 
+    #[napi(catch_unwind)]
+    pub async fn list_versions(&self) -> napi::Result<Vec<Version>> {
+        self.inner_ref()?
+            .list_versions()
+            .await
+            .map(|versions| {
+                versions
+                    .iter()
+                    .map(|version| Version {
+                        version: version.version as i64,
+                        timestamp: version.timestamp.timestamp_micros(),
+                        metadata: version
+                            .metadata
+                            .iter()
+                            .map(|(k, v)| (k.clone(), v.clone()))
+                            .collect(),
+                    })
+                    .collect()
+            })
+            .default_error()
+    }
+
     #[napi(catch_unwind)]
     pub async fn restore(&self) -> napi::Result<()> {
         self.inner_ref()?.restore().await.default_error()
@@ -466,3 +490,10 @@ impl From<lancedb::index::IndexStatistics> for IndexStatistics {
         }
     }
 }
+
+#[napi(object)]
+pub struct Version {
+    pub version: i64,
+    pub timestamp: i64,
+    pub metadata: HashMap<String, String>,
+}

python/.bumpversion.toml

@@ -1,5 +1,5 @@
 [tool.bumpversion]
-current_version = "0.16.0"
+current_version = "0.16.1-beta.0"
 parse = """(?x)
     (?P<major>0|[1-9]\\d*)\\.
     (?P<minor>0|[1-9]\\d*)\\.

python/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "lancedb-python"
-version = "0.16.0"
+version = "0.16.1-beta.0"
 edition.workspace = true
 description = "Python bindings for LanceDB"
 license.workspace = true
@@ -17,11 +17,17 @@ crate-type = ["cdylib"]
 arrow = { version = "52.1", features = ["pyarrow"] }
 lancedb = { path = "../rust/lancedb", default-features = false }
 env_logger.workspace = true
-pyo3 = { version = "0.21", features = ["extension-module", "abi3-py38", "gil-refs"] }
+pyo3 = { version = "0.21", features = [
+    "extension-module",
+    "abi3-py39",
+    "gil-refs"
+] }
 # Using this fork for now: https://github.com/awestlake87/pyo3-asyncio/issues/119
 # pyo3-asyncio = { version = "0.20", features = ["attributes", "tokio-runtime"] }
-pyo3-asyncio-0-21 = { version = "0.21.0", features = ["attributes", "tokio-runtime"] }
+pyo3-asyncio-0-21 = { version = "0.21.0", features = [
-
+    "attributes",
+    "tokio-runtime"
+] }
 pin-project = "1.1.5"
 futures.workspace = true
 tokio = { version = "1.36.0", features = ["sync"] }
@@ -29,14 +35,13 @@ tokio = { version = "1.36.0", features = ["sync"] }
 [build-dependencies]
 pyo3-build-config = { version = "0.20.3", features = [
     "extension-module",
-    "abi3-py38",
+    "abi3-py39",
 ] }
 
 [features]
 default = ["default-tls", "remote"]
 fp16kernels = ["lancedb/fp16kernels"]
 remote = ["lancedb/remote"]
-
 # TLS
 default-tls = ["lancedb/default-tls"]
 native-tls = ["lancedb/native-tls"]

python/pyproject.toml

@@ -4,7 +4,7 @@ name = "lancedb"
 dependencies = [
     "deprecation",
     "nest-asyncio~=1.0",
-    "pylance==0.19.3b1",
+    "pylance==0.20.0b2",
     "tqdm>=4.27.0",
     "pydantic>=1.10",
     "packaging",
@@ -31,7 +31,6 @@ classifiers = [
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",

python/python/lancedb/embeddings/openai.py

@@ -83,25 +83,33 @@ class OpenAIEmbeddings(TextEmbeddingFunction):
         """
         openai = attempt_import_or_raise("openai")
 
+        valid_texts = []
+        valid_indices = []
+        for idx, text in enumerate(texts):
+            if text:
+                valid_texts.append(text)
+                valid_indices.append(idx)
+
         # TODO retry, rate limit, token limit
         try:
-            if self.name == "text-embedding-ada-002":
+            kwargs = {
-                rs = self._openai_client.embeddings.create(input=texts, model=self.name)
+                "input": valid_texts,
-            else:
+                "model": self.name,
-                kwargs = {
+            }
-                    "input": texts,
+            if self.name != "text-embedding-ada-002":
-                    "model": self.name,
+                kwargs["dimensions"] = self.dim
-                }
+
-                if self.dim:
+            rs = self._openai_client.embeddings.create(**kwargs)
-                    kwargs["dimensions"] = self.dim
+            valid_embeddings = {
-                rs = self._openai_client.embeddings.create(**kwargs)
+                idx: v.embedding for v, idx in zip(rs.data, valid_indices)
+            }
         except openai.BadRequestError:
             logging.exception("Bad request: %s", texts)
             return [None] * len(texts)
         except Exception:
             logging.exception("OpenAI embeddings error")
             raise
-        return [v.embedding for v in rs.data]
+        return [valid_embeddings.get(idx, None) for idx in range(len(texts))]
 
     @cached_property
     def _openai_client(self):

python/python/lancedb/pydantic.py

@@ -1,15 +1,5 @@
-#  Copyright 2023 LanceDB Developers
+# SPDX-License-Identifier: Apache-2.0
-#
+# SPDX-FileCopyrightText: Copyright The LanceDB Authors
-#  Licensed under the Apache License, Version 2.0 (the "License");
-#  you may not use this file except in compliance with the License.
-#  You may obtain a copy of the License at
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-#  Unless required by applicable law or agreed to in writing, software
-#  distributed under the License is distributed on an "AS IS" BASIS,
-#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-#  See the License for the specific language governing permissions and
-#  limitations under the License.
 
 """Pydantic (v1 / v2) adapter for LanceDB"""
 
@@ -30,6 +20,7 @@ from typing import (
     Type,
     Union,
     _GenericAlias,
+    GenericAlias,
 )
 
 import numpy as np
@@ -75,7 +66,7 @@ def vector(dim: int, value_type: pa.DataType = pa.float32()):
 
 
 def Vector(
-    dim: int, value_type: pa.DataType = pa.float32()
+    dim: int, value_type: pa.DataType = pa.float32(), nullable: bool = True
 ) -> Type[FixedSizeListMixin]:
     """Pydantic Vector Type.
 
@@ -88,6 +79,8 @@ def Vector(
         The dimension of the vector.
     value_type : pyarrow.DataType, optional
         The value type of the vector, by default pa.float32()
+    nullable : bool, optional
+        Whether the vector is nullable, by default it is True.
 
     Examples
     --------
@@ -103,7 +96,7 @@ def Vector(
     >>> assert schema == pa.schema([
     ...     pa.field("id", pa.int64(), False),
     ...     pa.field("url", pa.utf8(), False),
-    ...     pa.field("embeddings", pa.list_(pa.float32(), 768), False)
+    ...     pa.field("embeddings", pa.list_(pa.float32(), 768))
     ... ])
     """
 
@@ -112,6 +105,10 @@ def Vector(
         def __repr__(self):
             return f"FixedSizeList(dim={dim})"
 
+        @staticmethod
+        def nullable() -> bool:
+            return nullable
+
         @staticmethod
         def dim() -> int:
             return dim
@@ -205,9 +202,7 @@ else:
 def _pydantic_to_arrow_type(field: FieldInfo) -> pa.DataType:
     """Convert a Pydantic FieldInfo to Arrow DataType"""
 
-    if isinstance(field.annotation, _GenericAlias) or (
+    if isinstance(field.annotation, (_GenericAlias, GenericAlias)):
-        sys.version_info > (3, 9) and isinstance(field.annotation, types.GenericAlias)
-    ):
         origin = field.annotation.__origin__
         args = field.annotation.__args__
         if origin is list:
@@ -235,7 +230,7 @@ def _pydantic_to_arrow_type(field: FieldInfo) -> pa.DataType:
 
 def is_nullable(field: FieldInfo) -> bool:
     """Check if a Pydantic FieldInfo is nullable."""
-    if isinstance(field.annotation, _GenericAlias):
+    if isinstance(field.annotation, (_GenericAlias, GenericAlias)):
         origin = field.annotation.__origin__
         args = field.annotation.__args__
         if origin == Union:
@@ -246,6 +241,10 @@ def is_nullable(field: FieldInfo) -> bool:
         for typ in args:
             if typ is type(None):
                 return True
+    elif inspect.isclass(field.annotation) and issubclass(
+        field.annotation, FixedSizeListMixin
+    ):
+        return field.annotation.nullable()
     return False
 
 

python/python/lancedb/query.py

@@ -370,11 +370,13 @@ class LanceQueryBuilder(ABC):
         ----------
         limit: int
             The maximum number of results to return.
-            By default the query is limited to the first 10.
+            The default query limit is 10 results.
-            Call this method and pass 0, a negative value,
+            For ANN/KNN queries, you must specify a limit.
-            or None to remove the limit.
+            Entering 0, a negative number, or None will reset
-            *WARNING* if you have a large dataset, removing
+            the limit to the default value of 10.
-            the limit can potentially result in reading a
+            *WARNING* if you have a large dataset, setting
+            the limit to a large number, e.g. the table size,
+            can potentially result in reading a
             large amount of data into memory and cause
             out of memory issues.
 

python/python/lancedb/remote/table.py

@@ -78,6 +78,10 @@ class RemoteTable(Table):
             self.schema.metadata
         )
 
+    def list_versions(self):
+        """List all versions of the table"""
+        return self._loop.run_until_complete(self._table.list_versions())
+
     def to_arrow(self) -> pa.Table:
         """to_arrow() is not yet supported on LanceDB cloud."""
         raise NotImplementedError("to_arrow() is not yet supported on LanceDB cloud.")

python/python/lancedb/rerankers/cohere.py

@@ -41,7 +41,7 @@ class CohereReranker(Reranker):
 
     def __init__(
         self,
-        model_name: str = "rerank-english-v2.0",
+        model_name: str = "rerank-english-v3.0",
         column: str = "text",
         top_n: Union[int, None] = None,
         return_score="relevance",

python/python/lancedb/table.py

@@ -8,7 +8,7 @@ import inspect
 import time
 from abc import ABC, abstractmethod
 from dataclasses import dataclass
-from datetime import timedelta
+from datetime import datetime, timedelta
 from functools import cached_property
 from typing import (
     TYPE_CHECKING,
@@ -1015,15 +1015,36 @@ class Table(ABC):
     @abstractmethod
     def checkout(self):
         """
-        TODO comments
+        Checks out a specific version of the Table
+
+        Any read operation on the table will now access the data at the checked out
+        version. As a consequence, calling this method will disable any read consistency
+        interval that was previously set.
+
+        This is a read-only operation that turns the table into a sort of "view"
+        or "detached head".  Other table instances will not be affected.  To make the
+        change permanent you can use the `[Self::restore]` method.
+
+        Any operation that modifies the table will fail while the table is in a checked
+        out state.
+
+        To return the table to a normal state use `[Self::checkout_latest]`
         """
 
     @abstractmethod
     def checkout_latest(self):
         """
-        TODO comments
+        Ensures the table is pointing at the latest version
+
+        This can be used to manually update a table when the read_consistency_interval
+        is None
+        It can also be used to undo a `[Self::checkout]` operation
         """
 
+    @abstractmethod
+    def list_versions(self):
+        """List all versions of the table"""
+
     @cached_property
     def _dataset_uri(self) -> str:
         return _table_uri(self._conn.uri, self.name)
@@ -2914,6 +2935,19 @@ class AsyncTable:
         """
         return await self._inner.version()
 
+    async def list_versions(self):
+        """
+        List all versions of the table
+        """
+        versions = await self._inner.list_versions()
+        for v in versions:
+            ts_nanos = v["timestamp"]
+            v["timestamp"] = datetime.fromtimestamp(ts_nanos // 1e9) + timedelta(
+                microseconds=(ts_nanos % 1e9) // 1e3
+            )
+
+        return versions
+
     async def checkout(self, version):
         """
         Checks out a specific version of the Table

python/python/lancedb/util.py

@@ -11,6 +11,8 @@ from datetime import date, datetime
 from functools import singledispatch
 from typing import Tuple, Union, Optional, Any
 from urllib.parse import urlparse
+from threading import Lock
+from contextlib import contextmanager
 
 import numpy as np
 import pyarrow as pa
@@ -314,3 +316,27 @@ def deprecated(func):
 def validate_table_name(name: str):
     """Verify the table name is valid."""
     native_validate_table_name(name)
+
+
+class ConnectionPool:
+    def __init__(self, connection_factory, *, max_size: Optional[int] = None):
+        self.max_size = max_size
+        self._connection_factory = connection_factory
+        self._pool = []
+        self._lock = Lock()
+
+    @contextmanager
+    def connection(self):
+        with self._lock:
+            if self._pool:
+                conn = self._pool.pop()
+            else:
+                conn = self._connection_factory()
+
+        # release the lock before yielding
+        try:
+            yield conn
+        finally:
+            with self._lock:
+                if self.max_size is None or len(self._pool) < self.max_size:
+                    self._pool.append(conn)

python/python/tests/test_embeddings.py

@@ -90,10 +90,13 @@ def test_embedding_with_bad_results(tmp_path):
             self, texts: Union[List[str], np.ndarray]
         ) -> list[Union[np.array, None]]:
             # Return None, which is bad if field is non-nullable
-            return [
+            a = [
-                None if i % 2 == 0 else np.random.randn(self.ndims())
+                np.full(self.ndims(), np.nan)
+                if i % 2 == 0
+                else np.random.randn(self.ndims())
                 for i in range(len(texts))
             ]
+            return a
 
     db = lancedb.connect(tmp_path)
     registry = EmbeddingFunctionRegistry.get_instance()

python/python/tests/test_embeddings_slow.py

@@ -1,15 +1,6 @@
-#  Copyright (c) 2023. LanceDB Developers
+# SPDX-License-Identifier: Apache-2.0
-#
+# SPDX-FileCopyrightText: Copyright The LanceDB Authors
-#  Licensed under the Apache License, Version 2.0 (the "License");
+
-#  you may not use this file except in compliance with the License.
-#  You may obtain a copy of the License at
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-#  Unless required by applicable law or agreed to in writing, software
-#  distributed under the License is distributed on an "AS IS" BASIS,
-#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-#  See the License for the specific language governing permissions and
-#  limitations under the License.
 import importlib
 import io
 import os
@@ -17,6 +8,7 @@ import os
 import lancedb
 import numpy as np
 import pandas as pd
+import pyarrow as pa
 import pytest
 from lancedb.embeddings import get_registry
 from lancedb.pydantic import LanceModel, Vector
@@ -444,6 +436,30 @@ def test_watsonx_embedding(tmp_path):
         assert tbl.search("hello").limit(1).to_pandas()["text"][0] == "hello world"
 
 
+@pytest.mark.slow
+@pytest.mark.skipif(
+    os.environ.get("OPENAI_API_KEY") is None, reason="OPENAI_API_KEY not set"
+)
+def test_openai_with_empty_strs(tmp_path):
+    model = get_registry().get("openai").create(max_retries=0)
+
+    class TextModel(LanceModel):
+        text: str = model.SourceField()
+        vector: Vector(model.ndims()) = model.VectorField()
+
+    df = pd.DataFrame({"text": ["hello world", ""]})
+    db = lancedb.connect(tmp_path)
+    tbl = db.create_table("test", schema=TextModel, mode="overwrite")
+
+    tbl.add(df, on_bad_vectors="skip")
+    tb = tbl.to_arrow()
+    assert tb.schema.field_by_name("vector").type == pa.list_(
+        pa.float32(), model.ndims()
+    )
+    assert len(tb) == 2
+    assert tb["vector"].is_null().to_pylist() == [False, True]
+
+
 @pytest.mark.slow
 @pytest.mark.skipif(
     importlib.util.find_spec("ollama") is None, reason="Ollama not installed"

python/python/tests/test_pydantic.py

@@ -1,16 +1,5 @@
-#  Copyright 2023 LanceDB Developers
+# SPDX-License-Identifier: Apache-2.0
-#
+# SPDX-FileCopyrightText: Copyright The LanceDB Authors
-#  Licensed under the Apache License, Version 2.0 (the "License");
-#  you may not use this file except in compliance with the License.
-#  You may obtain a copy of the License at
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-#  Unless required by applicable law or agreed to in writing, software
-#  distributed under the License is distributed on an "AS IS" BASIS,
-#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-#  See the License for the specific language governing permissions and
-#  limitations under the License.
-
 
 import json
 import sys
@@ -172,6 +161,26 @@ def test_pydantic_to_arrow_py38():
     assert schema == expect_schema
 
 
+def test_nullable_vector():
+    class NullableModel(pydantic.BaseModel):
+        vec: Vector(16, nullable=False)
+
+    schema = pydantic_to_schema(NullableModel)
+    assert schema == pa.schema([pa.field("vec", pa.list_(pa.float32(), 16), False)])
+
+    class DefaultModel(pydantic.BaseModel):
+        vec: Vector(16)
+
+    schema = pydantic_to_schema(DefaultModel)
+    assert schema == pa.schema([pa.field("vec", pa.list_(pa.float32(), 16), True)])
+
+    class NotNullableModel(pydantic.BaseModel):
+        vec: Vector(16)
+
+    schema = pydantic_to_schema(NotNullableModel)
+    assert schema == pa.schema([pa.field("vec", pa.list_(pa.float32(), 16), True)])
+
+
 def test_fixed_size_list_field():
     class TestModel(pydantic.BaseModel):
         vec: Vector(16)
@@ -192,7 +201,7 @@ def test_fixed_size_list_field():
     schema = pydantic_to_schema(TestModel)
     assert schema == pa.schema(
         [
-            pa.field("vec", pa.list_(pa.float32(), 16), False),
+            pa.field("vec", pa.list_(pa.float32(), 16)),
             pa.field("li", pa.list_(pa.int64()), False),
         ]
     )

python/python/tests/test_remote_db.py

@@ -6,13 +6,16 @@ from datetime import timedelta
 import http.server
 import json
 import threading
+from concurrent.futures import ThreadPoolExecutor
 from unittest.mock import MagicMock
 import uuid
 
 import lancedb
 from lancedb.conftest import MockTextEmbeddingFunction
 from lancedb.remote import ClientConfig
+from lancedb.util import ConnectionPool
 from lancedb.remote.errors import HttpError, RetryError
+import lancedb.util
 import pytest
 import pyarrow as pa
 
@@ -55,6 +58,34 @@ def mock_lancedb_connection(handler):
             handle.join()
 
 
+@contextlib.contextmanager
+def mock_lancedb_connection_pool(handler):
+    with http.server.HTTPServer(
+        ("localhost", 8080), make_mock_http_handler(handler)
+    ) as server:
+        handle = threading.Thread(target=server.serve_forever)
+        handle.start()
+
+        def conn_factory():
+            lancedb.connect(
+                "db://dev",
+                api_key="fake",
+                host_override="http://localhost:8080",
+                client_config={
+                    "retry_config": {"retries": 2},
+                    "timeout_config": {
+                        "connect_timeout": 1,
+                    },
+                },
+            )
+
+        try:
+            yield ConnectionPool(conn_factory)
+        finally:
+            server.shutdown()
+            handle.join()
+
+
 @contextlib.asynccontextmanager
 async def mock_lancedb_connection_async(handler):
     with http.server.HTTPServer(
@@ -103,6 +134,47 @@ async def test_async_remote_db():
         assert table_names == []
 
 
+@pytest.mark.asyncio
+async def test_async_checkout():
+    def handler(request):
+        if request.path == "/v1/table/test/describe/":
+            request.send_response(200)
+            request.send_header("Content-Type", "application/json")
+            request.end_headers()
+            response = json.dumps({"version": 42, "schema": {"fields": []}})
+            request.wfile.write(response.encode())
+            return
+
+        content_len = int(request.headers.get("Content-Length"))
+        body = request.rfile.read(content_len)
+        body = json.loads(body)
+
+        print("body is", body)
+
+        count = 0
+        if body["version"] == 1:
+            count = 100
+        elif body["version"] == 2:
+            count = 200
+        elif body["version"] is None:
+            count = 300
+
+        request.send_response(200)
+        request.send_header("Content-Type", "application/json")
+        request.end_headers()
+        request.wfile.write(json.dumps(count).encode())
+
+    async with mock_lancedb_connection_async(handler) as db:
+        table = await db.open_table("test")
+        assert await table.count_rows() == 300
+        await table.checkout(1)
+        assert await table.count_rows() == 100
+        await table.checkout(2)
+        assert await table.count_rows() == 200
+        await table.checkout_latest()
+        assert await table.count_rows() == 300
+
+
 @pytest.mark.asyncio
 async def test_http_error():
     request_id_holder = {"request_id": None}
@@ -146,8 +218,7 @@ async def test_retry_error():
         assert cause.status_code == 429
 
 
-@contextlib.contextmanager
+def http_handler(query_handler):
-def query_test_table(query_handler):
     def handler(request):
         if request.path == "/v1/table/test/describe/":
             request.send_response(200)
@@ -171,7 +242,12 @@ def query_test_table(query_handler):
             request.send_response(404)
             request.end_headers()
 
-    with mock_lancedb_connection(handler) as db:
+    return handler
+
+
+@contextlib.contextmanager
+def query_test_table(connection_ctx_mgr):
+    with connection_ctx_mgr as db:
         assert repr(db) == "RemoteConnect(name=dev)"
         table = db.open_table("test")
         assert repr(table) == "RemoteTable(dev.test)"
@@ -179,6 +255,7 @@ def query_test_table(query_handler):
 
 
 def test_query_sync_minimal():
+    @http_handler
     def handler(body):
         assert body == {
             "distance_type": "l2",
@@ -188,28 +265,75 @@ def test_query_sync_minimal():
             "ef": None,
             "vector": [1.0, 2.0, 3.0],
             "nprobes": 20,
+            "version": None,
         }
 
         return pa.table({"id": [1, 2, 3]})
 
-    with query_test_table(handler) as table:
+    with query_test_table(mock_lancedb_connection(handler)) as table:
+        data = table.search([1, 2, 3]).to_list()
+        expected = [{"id": 1}, {"id": 2}, {"id": 3}]
+        assert data == expected
+
+    with query_test_table(mock_lancedb_connection_pool(handler).connection()) as table:
         data = table.search([1, 2, 3]).to_list()
         expected = [{"id": 1}, {"id": 2}, {"id": 3}]
         assert data == expected
 
 
+def test_query_sync_minimal_threaded():
+    num_query = 0
+
+    @http_handler
+    def handler(body):
+        assert body == {
+            "distance_type": "l2",
+            "k": 10,
+            "prefilter": False,
+            "refine_factor": None,
+            "ef": None,
+            "vector": [1.0, 2.0, 3.0],
+            "nprobes": 20,
+            "version": None,
+        }
+        nonlocal num_query
+        num_query += 1
+
+        return pa.table({"id": [1, 2, 3]})
+
+    pool = mock_lancedb_connection_pool(handler)
+
+    def _query(i):
+        with query_test_table(pool.connection()) as table:
+            data = table.search([1, 2, 3]).to_list()
+            expected = [{"id": 1}, {"id": 2}, {"id": 3}]
+            assert data == expected
+
+    with ThreadPoolExecutor as exec:
+        exec.map(_query, range(1000))
+
+    assert num_query == 1000
+
+
 def test_query_sync_empty_query():
+    @http_handler
     def handler(body):
         assert body == {
             "k": 10,
             "filter": "true",
             "vector": [],
             "columns": ["id"],
+            "version": None,
         }
 
         return pa.table({"id": [1, 2, 3]})
 
-    with query_test_table(handler) as table:
+    with query_test_table(mock_lancedb_connection(handler)) as table:
+        data = table.search(None).where("true").select(["id"]).limit(10).to_list()
+        expected = [{"id": 1}, {"id": 2}, {"id": 3}]
+        assert data == expected
+
+    with query_test_table(mock_lancedb_connection_pool(handler).connection()) as table:
         data = table.search(None).where("true").select(["id"]).limit(10).to_list()
         expected = [{"id": 1}, {"id": 2}, {"id": 3}]
         assert data == expected
@@ -230,6 +354,7 @@ def test_query_sync_maximal():
             "vector_column": "vector2",
             "fast_search": True,
             "with_row_id": True,
+            "version": None,
         }
 
         return pa.table({"id": [1, 2, 3], "name": ["a", "b", "c"]})
@@ -268,6 +393,7 @@ def test_query_sync_fts():
             },
             "k": 10,
             "vector": [],
+            "version": None,
         }
 
         return pa.table({"id": [1, 2, 3]})
@@ -284,6 +410,7 @@ def test_query_sync_fts():
             "k": 42,
             "vector": [],
             "with_row_id": True,
+            "version": None,
         }
 
         return pa.table({"id": [1, 2, 3]})
@@ -309,6 +436,7 @@ def test_query_sync_hybrid():
                 "k": 42,
                 "vector": [],
                 "with_row_id": True,
+                "version": None,
             }
             return pa.table({"_rowid": [1, 2, 3], "_score": [0.1, 0.2, 0.3]})
         else:
@@ -322,6 +450,7 @@ def test_query_sync_hybrid():
                 "nprobes": 20,
                 "ef": None,
                 "with_row_id": True,
+                "version": None,
             }
             return pa.table({"_rowid": [1, 2, 3], "_distance": [0.1, 0.2, 0.3]})
 

python/src/table.rs

@@ -8,7 +8,7 @@ use lancedb::table::{
 use pyo3::{
     exceptions::{PyRuntimeError, PyValueError},
     pyclass, pymethods,
-    types::{PyDict, PyDictMethods, PyString},
+    types::{IntoPyDict, PyDict, PyDictMethods, PyString},
     Bound, FromPyObject, PyAny, PyRef, PyResult, Python, ToPyObject,
 };
 use pyo3_asyncio_0_21::tokio::future_into_py;
@@ -246,6 +246,33 @@ impl Table {
         )
     }
 
+    pub fn list_versions(self_: PyRef<'_, Self>) -> PyResult<Bound<'_, PyAny>> {
+        let inner = self_.inner_ref()?.clone();
+        future_into_py(self_.py(), async move {
+            let versions = inner.list_versions().await.infer_error()?;
+            let versions_as_dict = Python::with_gil(|py| {
+                versions
+                    .iter()
+                    .map(|v| {
+                        let dict = PyDict::new_bound(py);
+                        dict.set_item("version", v.version).unwrap();
+                        dict.set_item(
+                            "timestamp",
+                            v.timestamp.timestamp_nanos_opt().unwrap_or_default(),
+                        )
+                        .unwrap();
+
+                        let tup: Vec<(&String, &String)> = v.metadata.iter().collect();
+                        dict.set_item("metadata", tup.into_py_dict(py)).unwrap();
+                        dict.to_object(py)
+                    })
+                    .collect::<Vec<_>>()
+            });
+
+            Ok(versions_as_dict)
+        })
+    }
+
     pub fn checkout(self_: PyRef<'_, Self>, version: u64) -> PyResult<Bound<'_, PyAny>> {
         let inner = self_.inner_ref()?.clone();
         future_into_py(self_.py(), async move {

rust/ffi/node/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "lancedb-node"
-version = "0.13.0"
+version = "0.13.1-beta.0"
 description = "Serverless, low-latency vector database for AI applications"
 license.workspace = true
 edition.workspace = true

rust/lancedb/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "lancedb"
-version = "0.13.0"
+version = "0.13.1-beta.0"
 edition.workspace = true
 description = "LanceDB: A serverless, low-latency vector database for AI applications"
 license.workspace = true

rust/lancedb/src/remote/table.rs

@@ -19,7 +19,7 @@ use http::header::CONTENT_TYPE;
 use http::StatusCode;
 use lance::arrow::json::JsonSchema;
 use lance::dataset::scanner::DatasetRecordBatchStream;
-use lance::dataset::{ColumnAlteration, NewColumnTransform};
+use lance::dataset::{ColumnAlteration, NewColumnTransform, Version};
 use lance_datafusion::exec::OneShotExec;
 use serde::{Deserialize, Serialize};
 use tokio::sync::RwLock;
@@ -363,6 +363,34 @@ impl<S: HttpSend> TableInternal for RemoteTable<S> {
             message: "restore is not supported on LanceDB cloud.".into(),
         })
     }
+
+    async fn list_versions(&self) -> Result<Vec<Version>> {
+        let request = self
+            .client
+            .post(&format!("/v1/table/{}/version/list/", self.name));
+        let (request_id, response) = self.client.send(request, true).await?;
+        let response = self.check_table_response(&request_id, response).await?;
+
+        #[derive(Deserialize)]
+        struct ListVersionsResponse {
+            versions: Vec<Version>,
+        }
+
+        let body = response.text().await.err_to_http(request_id.clone())?;
+        let body: ListVersionsResponse =
+            serde_json::from_str(&body).map_err(|err| Error::Http {
+                source: format!(
+                    "Failed to parse list_versions response: {}, body: {}",
+                    err, body
+                )
+                .into(),
+                request_id,
+                status_code: None,
+            })?;
+
+        Ok(body.versions)
+    }
+
     async fn schema(&self) -> Result<SchemaRef> {
         let schema = self.describe().await?.schema;
         Ok(Arc::new(schema.try_into()?))
@@ -775,6 +803,7 @@ mod tests {
     use arrow::{array::AsArray, compute::concat_batches, datatypes::Int32Type};
     use arrow_array::{Int32Array, RecordBatch, RecordBatchIterator};
     use arrow_schema::{DataType, Field, Schema};
+    use chrono::{DateTime, Utc};
     use futures::{future::BoxFuture, StreamExt, TryFutureExt};
     use lance_index::scalar::FullTextSearchQuery;
     use reqwest::Body;
@@ -1489,6 +1518,51 @@ mod tests {
         assert_eq!(indices, expected);
     }
 
+    #[tokio::test]
+    async fn test_list_versions() {
+        let table = Table::new_with_handler("my_table", |request| {
+            assert_eq!(request.method(), "POST");
+            assert_eq!(request.url().path(), "/v1/table/my_table/version/list/");
+
+            let version1 = lance::dataset::Version {
+                version: 1,
+                timestamp: "2024-01-01T00:00:00Z".parse().unwrap(),
+                metadata: Default::default(),
+            };
+            let version2 = lance::dataset::Version {
+                version: 2,
+                timestamp: "2024-02-01T00:00:00Z".parse().unwrap(),
+                metadata: Default::default(),
+            };
+            let response_body = serde_json::json!({
+                "versions": [
+                    version1,
+                    version2,
+                ]
+            });
+            let response_body = serde_json::to_string(&response_body).unwrap();
+
+            http::Response::builder()
+                .status(200)
+                .body(response_body)
+                .unwrap()
+        });
+
+        let versions = table.list_versions().await.unwrap();
+        assert_eq!(versions.len(), 2);
+        assert_eq!(versions[0].version, 1);
+        assert_eq!(
+            versions[0].timestamp,
+            "2024-01-01T00:00:00Z".parse::<DateTime<Utc>>().unwrap()
+        );
+        assert_eq!(versions[1].version, 2);
+        assert_eq!(
+            versions[1].timestamp,
+            "2024-02-01T00:00:00Z".parse::<DateTime<Utc>>().unwrap()
+        );
+        // assert_eq!(versions, expected);
+    }
+
     #[tokio::test]
     async fn test_index_stats() {
         let table = Table::new_with_handler("my_table", |request| {

rust/lancedb/src/table.rs

@@ -37,7 +37,7 @@ pub use lance::dataset::ColumnAlteration;
 pub use lance::dataset::NewColumnTransform;
 pub use lance::dataset::ReadParams;
 use lance::dataset::{
-    Dataset, UpdateBuilder as LanceUpdateBuilder, WhenMatched, WriteMode, WriteParams,
+    Dataset, UpdateBuilder as LanceUpdateBuilder, Version, WhenMatched, WriteMode, WriteParams,
 };
 use lance::dataset::{MergeInsertBuilder as LanceMergeInsertBuilder, WhenNotMatchedBySource};
 use lance::io::WrappingObjectStore;
@@ -426,6 +426,7 @@ pub(crate) trait TableInternal: std::fmt::Display + std::fmt::Debug + Send + Syn
     async fn checkout(&self, version: u64) -> Result<()>;
     async fn checkout_latest(&self) -> Result<()>;
     async fn restore(&self) -> Result<()>;
+    async fn list_versions(&self) -> Result<Vec<Version>>;
     async fn table_definition(&self) -> Result<TableDefinition>;
     fn dataset_uri(&self) -> &str;
 }
@@ -955,6 +956,11 @@ impl Table {
         self.inner.restore().await
     }
 
+    /// List all the versions of the table
+    pub async fn list_versions(&self) -> Result<Vec<Version>> {
+        self.inner.list_versions().await
+    }
+
     /// List all indices that have been created with [`Self::create_index`]
     pub async fn list_indices(&self) -> Result<Vec<IndexConfig>> {
         self.inner.list_indices().await
@@ -1319,7 +1325,7 @@ impl NativeTable {
         let (indices, mf) = futures::try_join!(dataset.load_indices(), dataset.latest_manifest())?;
         Ok(indices
             .iter()
-            .map(|i| VectorIndex::new_from_format(&mf, i))
+            .map(|i| VectorIndex::new_from_format(&(mf.0), i))
             .collect())
     }
 
@@ -1707,6 +1713,10 @@ impl TableInternal for NativeTable {
         self.dataset.reload().await
     }
 
+    async fn list_versions(&self) -> Result<Vec<Version>> {
+        Ok(self.dataset.get().await?.versions().await?)
+    }
+
     async fn restore(&self) -> Result<()> {
         let version =
             self.dataset