linter

.github/workflows/build_linux_wheel/action.yml

@@ -14,10 +14,6 @@ inputs:
     # Note: this does *not* mean the host is arm64, since we might be cross-compiling.
     required: false
     default: "false"
-  manylinux:
-    description: "The manylinux version to build for"
-    required: false
-    default: "2_17"
 runs:
   using: "composite"
   steps:
@@ -32,7 +28,7 @@ runs:
         command: build
         working-directory: python
         target: x86_64-unknown-linux-gnu
-        manylinux: ${{ inputs.manylinux }}
+        manylinux: "2_17"
         args: ${{ inputs.args }}
         before-script-linux: |
           set -e
@@ -47,7 +43,7 @@ runs:
         command: build
         working-directory: python
         target: aarch64-unknown-linux-gnu
-        manylinux: ${{ inputs.manylinux }}
+        manylinux: "2_24"
         args: ${{ inputs.args }}
         before-script-linux: |
           set -e

.github/workflows/pypi-publish.yml

@@ -6,23 +6,13 @@ on:
 
 jobs:
   linux:
-    name: Python ${{ matrix.config.platform }} manylinux${{ matrix.config.manylinux }}
     timeout-minutes: 60
     strategy:
       matrix:
         python-minor-version: ["8"]
-        config:
+        platform:
-          - platform: x86_64
+          - x86_64
-            manylinux: "2_17"
+          - aarch64
-            extra_args: ""
-          - platform: x86_64
-            manylinux: "2_28"
-            extra_args: "--features fp16kernels"
-          - platform: aarch64
-            manylinux: "2_24"
-            extra_args: ""
-          # We don't build fp16 kernels for aarch64, because it uses 
-          # cross compilation image, which doesn't have a new enough compiler.
     runs-on: "ubuntu-22.04"
     steps:
       - uses: actions/checkout@v4
@@ -36,9 +26,8 @@ jobs:
       - uses: ./.github/workflows/build_linux_wheel
         with:
           python-minor-version: ${{ matrix.python-minor-version }}
-          args: "--release --strip ${{ matrix.config.extra_args }}"
+          args: "--release --strip"
-          arm-build: ${{ matrix.config.platform == 'aarch64' }}
+          arm-build: ${{ matrix.platform == 'aarch64' }}
-          manylinux: ${{ matrix.config.manylinux }}
       - uses: ./.github/workflows/upload_wheel
         with:
           token: ${{ secrets.LANCEDB_PYPI_API_TOKEN }}
@@ -69,7 +58,7 @@ jobs:
       - uses: ./.github/workflows/build_mac_wheel
         with:
           python-minor-version: ${{ matrix.python-minor-version }}
-          args: "--release --strip --target ${{ matrix.config.target }} --features fp16kernels"
+          args: "--release --strip --target ${{ matrix.config.target }}"
       - uses: ./.github/workflows/upload_wheel
         with:
           python-minor-version: ${{ matrix.python-minor-version }}

.github/workflows/rust.yml

@@ -31,10 +31,6 @@ jobs:
       run:
         shell: bash
         working-directory: rust
-    env:
-      # Need up-to-date compilers for kernels
-      CC: gcc-12
-      CXX: g++-12
     steps:
     - uses: actions/checkout@v4
       with:
@@ -58,10 +54,6 @@ jobs:
       run:
         shell: bash
         working-directory: rust
-    env:
-      # Need up-to-date compilers for kernels
-      CC: gcc-12
-      CXX: g++-12
     steps:
     - uses: actions/checkout@v4
       with:

Cargo.toml

@@ -14,10 +14,10 @@ keywords = ["lancedb", "lance", "database", "vector", "search"]
 categories = ["database-implementations"]
 
 [workspace.dependencies]
-lance = { "version" = "=0.10.8", "features" = ["dynamodb"] }
+lance = { "version" = "=0.10.6", "features" = ["dynamodb"] }
-lance-index = { "version" = "=0.10.8" }
+lance-index = { "version" = "=0.10.6" }
-lance-linalg = { "version" = "=0.10.8" }
+lance-linalg = { "version" = "=0.10.6" }
-lance-testing = { "version" = "=0.10.8" }
+lance-testing = { "version" = "=0.10.6" }
 # Note that this one does not include pyarrow
 arrow = { version = "50.0", optional = false }
 arrow-array = "50.0"

docs/src/sql.md

@@ -66,7 +66,6 @@ Currently, Lance supports a growing list of SQL expressions.
 - `LIKE`, `NOT LIKE`
 - `CAST`
 - `regexp_match(column, pattern)`
-- [DataFusion Functions](https://arrow.apache.org/datafusion/user-guide/sql/scalar_functions.html)
 
 For example, the following filter string is acceptable:
 

node/src/query.ts

@@ -38,7 +38,7 @@ export class Query<T = number[]> {
   constructor (query?: T, tbl?: any, embeddings?: EmbeddingFunction<T>) {
     this._tbl = tbl
     this._query = query
-    this._limit = 10
+    this._limit = undefined
     this._nprobes = 20
     this._refineFactor = undefined
     this._select = undefined

node/src/remote/client.ts

@@ -103,18 +103,6 @@ function toLanceRes (res: AxiosResponse): RemoteResponse {
   }
 }
 
-async function decodeErrorData(
-  res: RemoteResponse,
-  responseType?: ResponseType
-): Promise<string> {
-  const errorData = await res.body()
-  if (responseType === 'arraybuffer') {
-      return new TextDecoder().decode(errorData)
-  } else {
-      return errorData
-  }
-}
-
 export class HttpLancedbClient {
   private readonly _url: string
   private readonly _apiKey: () => string
@@ -192,7 +180,7 @@ export class HttpLancedbClient {
     }
 
     if (response.status !== 200) {
-      const errorData = await decodeErrorData(response)
+      const errorData = new TextDecoder().decode(await response.body())
       throw new Error(
         `Server Error, status: ${response.status}, ` +
         `message: ${response.statusText}: ${errorData}`
@@ -238,7 +226,7 @@ export class HttpLancedbClient {
     }
 
     if (response.status !== 200) {
-      const errorData = await decodeErrorData(response, responseType)
+      const errorData = new TextDecoder().decode(await response.body())
       throw new Error(
         `Server Error, status: ${response.status}, ` +
         `message: ${response.statusText}: ${errorData}`

node/src/remote/index.ts

@@ -156,7 +156,7 @@ export class RemoteConnection implements Connection {
     }
 
     const res = await this._client.post(
-      `/v1/table/${encodeURIComponent(tableName)}/create/`,
+      `/v1/table/${tableName}/create/`,
       buffer,
       undefined,
       'application/vnd.apache.arrow.stream'
@@ -177,7 +177,7 @@ export class RemoteConnection implements Connection {
   }
 
   async dropTable (name: string): Promise<void> {
-    await this._client.post(`/v1/table/${encodeURIComponent(name)}/drop/`)
+    await this._client.post(`/v1/table/${name}/drop/`)
   }
 
   withMiddleware (middleware: HttpMiddleware): Connection {
@@ -268,7 +268,7 @@ export class RemoteTable<T = number[]> implements Table<T> {
 
   get schema (): Promise<any> {
     return this._client
-      .post(`/v1/table/${encodeURIComponent(this._name)}/describe/`)
+      .post(`/v1/table/${this._name}/describe/`)
       .then(async (res) => {
         if (res.status !== 200) {
           throw new Error(
@@ -282,7 +282,7 @@ export class RemoteTable<T = number[]> implements Table<T> {
   }
 
   search (query: T): Query<T> {
-    return new RemoteQuery(query, this._client, encodeURIComponent(this._name)) //, this._embeddings_new)
+    return new RemoteQuery(query, this._client, this._name) //, this._embeddings_new)
   }
 
   filter (where: string): Query<T> {
@@ -324,7 +324,7 @@ export class RemoteTable<T = number[]> implements Table<T> {
 
     const buffer = await fromTableToStreamBuffer(tbl, this._embeddings)
     const res = await this._client.post(
-      `/v1/table/${encodeURIComponent(this._name)}/merge_insert/`,
+      `/v1/table/${this._name}/merge_insert/`,
       buffer,
       queryParams,
       'application/vnd.apache.arrow.stream'
@@ -348,7 +348,7 @@ export class RemoteTable<T = number[]> implements Table<T> {
 
     const buffer = await fromTableToStreamBuffer(tbl, this._embeddings)
     const res = await this._client.post(
-      `/v1/table/${encodeURIComponent(this._name)}/insert/`,
+      `/v1/table/${this._name}/insert/`,
       buffer,
       {
         mode: 'append'
@@ -374,7 +374,7 @@ export class RemoteTable<T = number[]> implements Table<T> {
     }
     const buffer = await fromTableToStreamBuffer(tbl, this._embeddings)
     const res = await this._client.post(
-      `/v1/table/${encodeURIComponent(this._name)}/insert/`,
+      `/v1/table/${this._name}/insert/`,
       buffer,
       {
         mode: 'overwrite'
@@ -421,7 +421,7 @@ export class RemoteTable<T = number[]> implements Table<T> {
       index_cache_size: indexCacheSize
     }
     const res = await this._client.post(
-      `/v1/table/${encodeURIComponent(this._name)}/create_index/`,
+      `/v1/table/${this._name}/create_index/`,
       data
     )
     if (res.status !== 200) {
@@ -442,7 +442,7 @@ export class RemoteTable<T = number[]> implements Table<T> {
       replace: true
     }
     const res = await this._client.post(
-      `/v1/table/${encodeURIComponent(this._name)}/create_scalar_index/`,
+      `/v1/table/${this._name}/create_scalar_index/`,
       data
     )
     if (res.status !== 200) {
@@ -455,14 +455,14 @@ export class RemoteTable<T = number[]> implements Table<T> {
   }
 
   async countRows (filter?: string): Promise<number> {
-    const result = await this._client.post(`/v1/table/${encodeURIComponent(this._name)}/count_rows/`, {
+    const result = await this._client.post(`/v1/table/${this._name}/count_rows/`, {
       predicate: filter
     })
-    return (await result.body())
+    return (await result.body())?.stats?.num_rows
   }
 
   async delete (filter: string): Promise<void> {
-    await this._client.post(`/v1/table/${encodeURIComponent(this._name)}/delete/`, {
+    await this._client.post(`/v1/table/${this._name}/delete/`, {
       predicate: filter
     })
   }
@@ -481,7 +481,7 @@ export class RemoteTable<T = number[]> implements Table<T> {
         updates[key] = toSQL(value)
       }
     }
-    await this._client.post(`/v1/table/${encodeURIComponent(this._name)}/update/`, {
+    await this._client.post(`/v1/table/${this._name}/update/`, {
       predicate: filter,
       updates: Object.entries(updates).map(([key, value]) => [key, value])
     })
@@ -489,7 +489,7 @@ export class RemoteTable<T = number[]> implements Table<T> {
 
   async listIndices (): Promise<VectorIndex[]> {
     const results = await this._client.post(
-      `/v1/table/${encodeURIComponent(this._name)}/index/list/`
+      `/v1/table/${this._name}/index/list/`
     )
     return (await results.body()).indexes?.map((index: any) => ({
       columns: index.columns,
@@ -500,7 +500,7 @@ export class RemoteTable<T = number[]> implements Table<T> {
 
   async indexStats (indexUuid: string): Promise<IndexStats> {
     const results = await this._client.post(
-      `/v1/table/${encodeURIComponent(this._name)}/index/${indexUuid}/stats/`
+      `/v1/table/${this._name}/index/${indexUuid}/stats/`
     )
     const body = await results.body()
     return {

python/Cargo.toml

@@ -31,6 +31,3 @@ pyo3-build-config = { version = "0.20.3", features = [
     "extension-module",
     "abi3-py38",
 ] }
-
-[features]
-fp16kernels = ["lancedb/fp16kernels"]

python/pyproject.toml

@@ -3,7 +3,7 @@ name = "lancedb"
 version = "0.6.6"
 dependencies = [
     "deprecation",
-    "pylance==0.10.8",
+    "pylance==0.10.6",
     "ratelimiter~=1.0",
     "retry>=0.9.2",
     "tqdm>=4.27.0",
@@ -41,7 +41,6 @@ classifiers = [
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
-    "Programming Language :: Python :: 3.12",
     "Topic :: Scientific/Engineering",
 ]
 

python/python/lancedb/remote/table.py

@@ -500,10 +500,7 @@ class RemoteTable(Table):
 
     def count_rows(self, filter: Optional[str] = None) -> int:
         payload = {"predicate": filter}
-        resp = self._conn._client.post(
+        self._conn._client.post(f"/v1/table/{self._name}/count_rows/", data=payload)
-            f"/v1/table/{self._name}/count_rows/", data=payload
-        )
-        return resp
 
     def add_columns(self, transforms: Dict[str, str]):
         raise NotImplementedError(

rust/lancedb/Cargo.toml

@@ -50,4 +50,3 @@ walkdir = "2"
 [features]
 default = ["remote"]
 remote = ["dep:reqwest"]
-fp16kernels = ["lance-linalg/fp16kernels"]

rust/lancedb/src/io/object_store.rs

@@ -39,11 +39,29 @@ use tokio::{
 struct MirroringObjectStore {
     primary: Arc<dyn ObjectStore>,
     secondary: Arc<dyn ObjectStore>,
+    secondary_copy_behavior: MirroringSecondaryCopy,
+}
+
+impl MirroringObjectStore {
+    async fn secondary_copy(&self, from: &Path, to: &Path) -> Result<()> {
+        let secondary_cp_result = self.secondary.copy(from, to).await;
+        match (&self.secondary_copy_behavior, secondary_cp_result) {
+            (_, Ok(_)) => Ok(()),
+            (
+                MirroringSecondaryCopy::SkipIfNotFound,
+                Err(object_store::Error::NotFound { path: _, source: _ }),
+            ) => Ok(()),
+            (_, Err(e)) => Err(e),
+        }
+    }
 }
 
 impl std::fmt::Display for MirroringObjectStore {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
-        writeln!(f, "MirrowingObjectStore")?;
+        write!(f, "MirroringObjectStore(secondary_copy_behavior=")?;
+        self.secondary_copy_behavior.fmt(f)?;
+        writeln!(f, ")")?;
+
         writeln!(f, "primary:")?;
         self.primary.fmt(f)?;
         writeln!(f, "secondary:")?;
@@ -62,12 +80,40 @@ impl PrimaryOnly for Path {
     }
 }
 
-/// An object store that mirrors write to secondsry object store first
+/// Controls the behavior of copying objects in the secondary store.
+#[derive(Debug, Clone)]
+pub enum MirroringSecondaryCopy {
+    // Default behaviour is to copy
+    Copy,
+    // Since the secondary store may not be as durable as the primary, the copy source
+    // may exist on the primary but not on the secondary. If the source is not found,
+    // this skips making the copy
+    SkipIfNotFound,
+}
+
+impl Default for MirroringSecondaryCopy {
+    fn default() -> Self {
+        Self::Copy
+    }
+}
+
+impl std::fmt::Display for MirroringSecondaryCopy {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Copy => write!(f, "Copy"),
+            Self::SkipIfNotFound => write!(f, "SkipIfNotFound"),
+        }?;
+
+        Ok(())
+    }
+}
+
+/// An object store that mirrors write to secondary object store first
 /// and than commit to primary object store.
 ///
-/// This is meant to mirrow writes to a less-durable but lower-latency
+/// This is meant to mirror writes to a less-durable but lower-latency
 /// store. We have primary store that is durable but slow, and a secondary
-/// store that is fast but not asdurable
+/// store that is fast but not as durable
 ///
 /// Note: this object store does not mirror writes to *.manifest files
 #[async_trait]
@@ -156,7 +202,7 @@ impl ObjectStore for MirroringObjectStore {
         if to.primary_only() {
             self.primary.copy(from, to).await
         } else {
-            self.secondary.copy(from, to).await?;
+            self.secondary_copy(from, to).await?;
             self.primary.copy(from, to).await?;
             Ok(())
         }
@@ -164,7 +210,7 @@ impl ObjectStore for MirroringObjectStore {
 
     async fn copy_if_not_exists(&self, from: &Path, to: &Path) -> Result<()> {
         if !to.primary_only() {
-            self.secondary.copy(from, to).await?;
+            self.secondary_copy(from, to).await?;
         }
         self.primary.copy_if_not_exists(from, to).await
     }
@@ -314,33 +360,152 @@ impl AsyncWrite for MirroringUpload {
 #[derive(Debug)]
 pub struct MirroringObjectStoreWrapper {
     secondary: Arc<dyn ObjectStore>,
+    secondary_copy_behavior: MirroringSecondaryCopy,
+    secondary_wrapper: Option<Arc<dyn WrappingObjectStore>>,
 }
 
 impl MirroringObjectStoreWrapper {
     pub fn new(secondary: Arc<dyn ObjectStore>) -> Self {
-        Self { secondary }
+        Self {
+            secondary,
+            secondary_copy_behavior: MirroringSecondaryCopy::default(),
+            secondary_wrapper: None,
+        }
+    }
+
+    pub fn with_secondary_copy_behavior(
+        mut self,
+        secondary_copy_behavior: MirroringSecondaryCopy,
+    ) -> Self {
+        self.secondary_copy_behavior = secondary_copy_behavior;
+        self
+    }
+
+    pub fn with_secondary_wrapper(mut self, wrapper: Arc<dyn WrappingObjectStore>) -> Self {
+        self.secondary_wrapper = Some(wrapper);
+        self
     }
 }
 
 impl WrappingObjectStore for MirroringObjectStoreWrapper {
     fn wrap(&self, primary: Arc<dyn ObjectStore>) -> Arc<dyn ObjectStore> {
+        let mut secondary = self.secondary.clone();
+        if let Some(wrapper) = &self.secondary_wrapper {
+            secondary = wrapper.wrap(secondary);
+        }
         Arc::new(MirroringObjectStore {
             primary,
-            secondary: self.secondary.clone(),
+            secondary,
+            secondary_copy_behavior: self.secondary_copy_behavior.clone(),
         })
     }
 }
 
+/// An object store that will check if the source of the copy exists before attempting
+/// to copy the object.
+///
+/// The primary use case is to workaround a bug in version 0.9 of object_store where
+/// copying from a non-existent source causes the thread to hang forever
+/// https://github.com/apache/arrow-rs/issues/5503
+#[derive(Debug)]
+struct CheckedCopyObjectStore {
+    inner: Arc<dyn ObjectStore>,
+}
+
+impl std::fmt::Display for CheckedCopyObjectStore {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        writeln!(f, "CheckedCopyObjectStore")?;
+        writeln!(f, "inner:")?;
+        self.inner.fmt(f)?;
+        Ok(())
+    }
+}
+
+#[async_trait]
+impl ObjectStore for CheckedCopyObjectStore {
+    async fn put_opts(&self, location: &Path, bytes: Bytes, opts: PutOptions) -> Result<PutResult> {
+        self.inner.put_opts(location, bytes, opts).await
+    }
+
+    async fn put_multipart(
+        &self,
+        location: &Path,
+    ) -> Result<(MultipartId, Box<dyn AsyncWrite + Unpin + Send>)> {
+        self.inner.put_multipart(location).await
+    }
+
+    async fn abort_multipart(&self, location: &Path, multipart_id: &MultipartId) -> Result<()> {
+        self.inner.abort_multipart(location, multipart_id).await
+    }
+
+    async fn get_opts(&self, location: &Path, options: GetOptions) -> Result<GetResult> {
+        self.inner.get_opts(location, options).await
+    }
+
+    async fn delete(&self, location: &Path) -> Result<()> {
+        self.inner.delete(location).await
+    }
+
+    fn list(&self, prefix: Option<&Path>) -> BoxStream<'_, Result<ObjectMeta>> {
+        self.inner.list(prefix)
+    }
+
+    async fn list_with_delimiter(&self, prefix: Option<&Path>) -> Result<ListResult> {
+        self.inner.list_with_delimiter(prefix).await
+    }
+
+    async fn copy(&self, from: &Path, to: &Path) -> Result<()> {
+        // check that the from object exists
+        self.inner.head(from).await?;
+        self.inner.copy(from, to).await
+    }
+
+    async fn copy_if_not_exists(&self, from: &Path, to: &Path) -> Result<()> {
+        // check that the from object exists
+        self.inner.head(from).await?;
+        self.inner.copy_if_not_exists(from, to).await
+    }
+}
+
+#[derive(Debug)]
+pub struct CheckedCopyObjectStoreWrapper {}
+
+impl CheckedCopyObjectStoreWrapper {
+    pub fn new() -> Self {
+        Self {}
+    }
+}
+
+impl Default for CheckedCopyObjectStoreWrapper {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl WrappingObjectStore for CheckedCopyObjectStoreWrapper {
+    fn wrap(&self, inner: Arc<dyn ObjectStore>) -> Arc<dyn ObjectStore> {
+        Arc::new(CheckedCopyObjectStore { inner })
+    }
+}
+
 // windows pathing can't be simply concatenated
 #[cfg(all(test, not(windows)))]
 mod test {
     use super::*;
 
     use futures::TryStreamExt;
-    use lance::{dataset::WriteParams, io::ObjectStoreParams};
+    use lance::{
+        dataset::WriteParams,
+        io::{ObjectStore, ObjectStoreParams},
+    };
     use lance_testing::datagen::{BatchGenerator, IncrementingInt32, RandomVector};
     use object_store::local::LocalFileSystem;
+    use object_store::ObjectStore as _;
+    use std::fs::File;
+    use std::io::Write;
+    use std::time::Duration;
     use tempfile;
+    use url::Url;
 
     use crate::{
         connect,
@@ -354,9 +519,8 @@ mod test {
         let dir2 = tempfile::tempdir().unwrap().into_path();
 
         let secondary_store = LocalFileSystem::new_with_prefix(dir2.to_str().unwrap()).unwrap();
-        let object_store_wrapper = Arc::new(MirroringObjectStoreWrapper {
+        let object_store_wrapper =
-            secondary: Arc::new(secondary_store),
+            Arc::new(MirroringObjectStoreWrapper::new(Arc::new(secondary_store)));
-        });
 
         let db = connect(dir1.to_str().unwrap()).execute().await.unwrap();
 
@@ -393,9 +557,9 @@ mod test {
             .await
             .unwrap();
 
-        let bateches = q.try_collect::<Vec<_>>().await.unwrap();
+        let batches = q.try_collect::<Vec<_>>().await.unwrap();
-        assert_eq!(bateches.len(), 1);
+        assert_eq!(batches.len(), 1);
-        assert_eq!(bateches[0].num_rows(), 10);
+        assert_eq!(batches[0].num_rows(), 10);
 
         use walkdir::WalkDir;
 
@@ -430,4 +594,100 @@ mod test {
             secondary_elem = secondary_iter.next();
         }
     }
+
+    #[tokio::test]
+    async fn test_secondary_copy_skip_if_not_found() {
+        let dir1 = tempfile::tempdir().unwrap().into_path();
+        let dir2 = tempfile::tempdir().unwrap().into_path();
+
+        // create a file that only exists in partition 1
+        let file_path = format!("{}/hello.txt", dir1.to_str().unwrap());
+        let mut file = File::create(file_path).unwrap();
+        file.write_all(b"hello").unwrap();
+
+        // check we can copy a file that exists on the primary while skipping the secondary
+        let secondary_store =
+            Arc::new(LocalFileSystem::new_with_prefix(dir2.to_str().unwrap()).unwrap());
+        let mirroring_wrapper = MirroringObjectStoreWrapper::new(secondary_store.clone())
+            .with_secondary_copy_behavior(MirroringSecondaryCopy::SkipIfNotFound)
+            .with_secondary_wrapper(Arc::new(CheckedCopyObjectStoreWrapper::new()));
+
+        let primary_store = LocalFileSystem::new_with_prefix(dir1.to_str().unwrap()).unwrap();
+        let store = ObjectStore::new(
+            Arc::new(primary_store) as _,
+            Url::from_directory_path(dir1.clone()).unwrap(),
+            None,
+            Some(Arc::new(mirroring_wrapper)),
+        );
+
+        let result = store
+            .copy(&Path::from("hello.txt"), &Path::from("hello2.txt"))
+            .await;
+        assert!(result.is_ok());
+        assert!(store.exists(&Path::from("hello2.txt")).await.unwrap());
+
+        // check that we will return an error if using MirroedSecondarryCopy::Copy and also that the primary copy does not succeed
+        let mirroring_wrapper = MirroringObjectStoreWrapper::new(secondary_store.clone())
+            .with_secondary_copy_behavior(MirroringSecondaryCopy::Copy)
+            .with_secondary_wrapper(Arc::new(CheckedCopyObjectStoreWrapper::new()));
+        let primary_store = LocalFileSystem::new_with_prefix(dir1.to_str().unwrap()).unwrap();
+        let store = ObjectStore::new(
+            Arc::new(primary_store) as _,
+            Url::from_directory_path(dir1).unwrap(),
+            None,
+            Some(Arc::new(mirroring_wrapper)),
+        );
+
+        let result = store
+            .copy(&Path::from("hello.txt"), &Path::from("hello3.txt"))
+            .await;
+        assert!(result.is_err());
+        assert!(!store.exists(&Path::from("hello3.txt")).await.unwrap());
+
+        // check that if the file exists in the secondary store, we can successfully copy it
+        let file_path = format!("{}/hello.txt", dir2.to_str().unwrap());
+        let mut file = File::create(file_path).unwrap();
+        file.write_all(b"hello").unwrap();
+
+        let result = store
+            .copy(&Path::from("hello.txt"), &Path::from("hello3.txt"))
+            .await;
+        assert!(result.is_ok());
+        assert!(store.exists(&Path::from("hello3.txt")).await.unwrap());
+        assert!(secondary_store
+            .as_ref()
+            .head(&Path::from("hello3.txt"))
+            .await
+            .is_ok());
+    }
+
+    #[tokio::test]
+    async fn test_copy_loop_avoidance() {
+        let dir1 = tempfile::tempdir().unwrap().into_path();
+
+        let object_store_wrapper = CheckedCopyObjectStoreWrapper::new();
+
+        let store_params = ObjectStoreParams {
+            object_store_wrapper: Some(Arc::new(object_store_wrapper)),
+            ..Default::default()
+        };
+        let (store, _) = ObjectStore::from_uri_and_params(dir1.to_str().unwrap(), &store_params)
+            .await
+            .unwrap();
+
+        // wrap in timeout to ensure we don't go into the infinite loop
+        // https://github.com/apache/arrow-rs/issues/5503
+        tokio::time::timeout(Duration::from_secs(10), async move {
+            let result = store
+                .copy(&Path::from("hello1.txt"), &Path::from("hello2.txt"))
+                .await;
+            if result.is_ok() {
+                return Err("copy should have errored".to_string());
+            }
+            Ok(())
+        })
+        .await
+        .unwrap()
+        .unwrap();
+    }
 }

rust/lancedb/src/table.rs

@@ -1304,7 +1304,14 @@ impl TableInternal for NativeTable {
     }
 
     async fn count_rows(&self, filter: Option<String>) -> Result<usize> {
-        Ok(self.dataset.get().await?.count_rows(filter).await?)
+        let dataset = self.dataset.get().await?;
+        if let Some(filter) = filter {
+            let mut scanner = dataset.scan();
+            scanner.filter(&filter)?;
+            Ok(scanner.count_rows().await? as usize)
+        } else {
+            Ok(dataset.count_rows().await?)
+        }
     }
 
     async fn add(