feat: Add Lance optional dependencies

Signed-off-by: HaoXuAI <sduxuhao@gmail.com>
haoxu0 · Oct 9, 2026 · Oct 7, 2026 · Oct 7, 2026 · Oct 8, 2026 · Oct 8, 2026
commit 7afdffa72550092b3cc321ee64c412e179e53c66
@@ -8,6 +8,29 @@ Feast supports modern table formats to enable data lakehouse architectures with
 
 ## Supported Table Formats
 
+### Lance
+
+[Lance](https://lancedb.github.io/lance/) is an Arrow-native table format with
+versioned datasets and vector indexing. Install Feast's native Lance reader and
+namespace client with:
+
+```bash
+pip install 'feast[lance]'
+```
+
+Use `LanceFormat` to select a namespace and optionally pin reads to a dataset
+version or tag:
+
+```python
+from feast.table_format import LanceFormat
+
+lance_format = LanceFormat(
+    catalog="my_catalog",
+    namespace="features",
+    tag="candidate",
+)
+```
+
 ### Apache Iceberg
 
 [Apache Iceberg](https://iceberg.apache.org/) is an open table format designed for huge analytic datasets. It provides:
@@ -354,4 +377,4 @@ Future support planned for:
 - [Apache Iceberg Documentation](https://iceberg.apache.org/docs/latest/)
 - [Delta Lake Documentation](https://docs.delta.io/latest/index.html)
 - [Apache Hudi Documentation](https://hudi.apache.org/docs/overview)
-- [Python API Reference - TableFormat](https://rtd.feast.dev/en/master/#feast.table_format)
+- [Python API Reference - TableFormat](https://rtd.feast.dev/en/master/#feast.table_format)
diff --git a/pyproject.toml b/pyproject.toml
@@ -116,6 +116,10 @@ openlineage = ["openlineage-python>=1.40.0"]
 opentelemetry = ["prometheus_client", "psutil"]
 spark = ["pyspark>=4.0.0"]
 iceberg = ["pyiceberg>=0.7.0"]
+lance = [
+    "pylance>=12.0.0",
+    "lance-namespace>=0.11.1",
+]
 trino = ["trino>=0.305.0,<0.400.0", "regex"]
 postgres = ["psycopg[binary,pool]>=3.2.5"]
 # psycopg[c] install requires a system with a C compiler, python dev headers, & postgresql client dev headers
@@ -167,7 +171,7 @@ test = [
 ]
 
 ci = [
-    "feast[test, aws, azure, cassandra, clickhouse, couchbase, delta, docling, duckdb, elasticsearch, faiss, gcp, ge, glide, go, grpcio, hazelcast, hbase, ibis, iceberg, image, k8s, mcp, milvus, mlflow, mongodb, mssql, mysql, openlineage, opentelemetry, oracle, scylladb, spark, trino, postgres, pytorch, qdrant, rag, ray, redis, singlestore, snowflake, sqlite_vec]",
+    "feast[test, aws, azure, cassandra, clickhouse, couchbase, delta, docling, duckdb, elasticsearch, faiss, gcp, ge, glide, go, grpcio, hazelcast, hbase, ibis, iceberg, image, k8s, lance, mcp, milvus, mlflow, mongodb, mssql, mysql, openlineage, opentelemetry, oracle, scylladb, spark, trino, postgres, pytorch, qdrant, rag, ray, redis, singlestore, snowflake, sqlite_vec]",
     "build",
     "virtualenv==20.23.0",
     "dbt-artifacts-parser",

@@ -0,0 +1,18 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+import toml  # type: ignore[import-untyped]
+
+
+def test_lance_extra_installs_native_reader_and_is_included_in_ci() -> None:
+    pyproject_path = Path(__file__).resolve().parents[6] / "pyproject.toml"
+    pyproject = toml.loads(pyproject_path.read_text())
+
+    extras = pyproject["project"]["optional-dependencies"]
+
+    assert extras["lance"] == [
+        "pylance>=12.0.0",
+        "lance-namespace>=0.11.1",
+    ]
+    assert "lance" in extras["ci"][0]