chore: update lance dependency to v5.0.0-rc.1

`.get(b"split_names", None).decode()` was called unconditionally in both
Permutations.__init__ and Permutation.from_tables(), crashing with
AttributeError when schema metadata existed but lacked the split_names
key. Guard the decode behind a None check and add regression tests.

Cargo.lock

@@ -3072,8 +3072,8 @@ checksum = "42703706b716c37f96a77aea830392ad231f44c9e9a67872fa5548707e11b11c"
 
 [[package]]
 name = "fsst"
-version = "5.0.0-beta.5"
-source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-beta.5#d630106da5a238b3adfb8c5dea3b3921f3519945"
+version = "5.0.0-rc.1"
+source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-rc.1#d130b036a62a5d8a904dfbe711d3f7b91b132194"
 dependencies = [
  "arrow-array",
  "rand 0.9.2",
@@ -4134,8 +4134,8 @@ dependencies = [
 
 [[package]]
 name = "lance"
-version = "5.0.0-beta.5"
-source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-beta.5#d630106da5a238b3adfb8c5dea3b3921f3519945"
+version = "5.0.0-rc.1"
+source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-rc.1#d130b036a62a5d8a904dfbe711d3f7b91b132194"
 dependencies = [
  "arrow",
  "arrow-arith",
@@ -4201,13 +4201,14 @@ dependencies = [
 
 [[package]]
 name = "lance-arrow"
-version = "5.0.0-beta.5"
-source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-beta.5#d630106da5a238b3adfb8c5dea3b3921f3519945"
+version = "5.0.0-rc.1"
+source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-rc.1#d130b036a62a5d8a904dfbe711d3f7b91b132194"
 dependencies = [
  "arrow-array",
  "arrow-buffer",
  "arrow-cast",
  "arrow-data",
+ "arrow-ipc",
  "arrow-ord",
  "arrow-schema",
  "arrow-select",
@@ -4222,8 +4223,8 @@ dependencies = [
 
 [[package]]
 name = "lance-bitpacking"
-version = "5.0.0-beta.5"
-source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-beta.5#d630106da5a238b3adfb8c5dea3b3921f3519945"
+version = "5.0.0-rc.1"
+source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-rc.1#d130b036a62a5d8a904dfbe711d3f7b91b132194"
 dependencies = [
  "arrayref",
  "paste",
@@ -4232,8 +4233,8 @@ dependencies = [
 
 [[package]]
 name = "lance-core"
-version = "5.0.0-beta.5"
-source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-beta.5#d630106da5a238b3adfb8c5dea3b3921f3519945"
+version = "5.0.0-rc.1"
+source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-rc.1#d130b036a62a5d8a904dfbe711d3f7b91b132194"
 dependencies = [
  "arrow-array",
  "arrow-buffer",
@@ -4270,8 +4271,8 @@ dependencies = [
 
 [[package]]
 name = "lance-datafusion"
-version = "5.0.0-beta.5"
-source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-beta.5#d630106da5a238b3adfb8c5dea3b3921f3519945"
+version = "5.0.0-rc.1"
+source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-rc.1#d130b036a62a5d8a904dfbe711d3f7b91b132194"
 dependencies = [
  "arrow",
  "arrow-array",
@@ -4301,8 +4302,8 @@ dependencies = [
 
 [[package]]
 name = "lance-datagen"
-version = "5.0.0-beta.5"
-source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-beta.5#d630106da5a238b3adfb8c5dea3b3921f3519945"
+version = "5.0.0-rc.1"
+source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-rc.1#d130b036a62a5d8a904dfbe711d3f7b91b132194"
 dependencies = [
  "arrow",
  "arrow-array",
@@ -4320,8 +4321,8 @@ dependencies = [
 
 [[package]]
 name = "lance-encoding"
-version = "5.0.0-beta.5"
-source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-beta.5#d630106da5a238b3adfb8c5dea3b3921f3519945"
+version = "5.0.0-rc.1"
+source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-rc.1#d130b036a62a5d8a904dfbe711d3f7b91b132194"
 dependencies = [
  "arrow-arith",
  "arrow-array",
@@ -4358,8 +4359,8 @@ dependencies = [
 
 [[package]]
 name = "lance-file"
-version = "5.0.0-beta.5"
-source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-beta.5#d630106da5a238b3adfb8c5dea3b3921f3519945"
+version = "5.0.0-rc.1"
+source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-rc.1#d130b036a62a5d8a904dfbe711d3f7b91b132194"
 dependencies = [
  "arrow-arith",
  "arrow-array",
@@ -4391,8 +4392,8 @@ dependencies = [
 
 [[package]]
 name = "lance-index"
-version = "5.0.0-beta.5"
-source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-beta.5#d630106da5a238b3adfb8c5dea3b3921f3519945"
+version = "5.0.0-rc.1"
+source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-rc.1#d130b036a62a5d8a904dfbe711d3f7b91b132194"
 dependencies = [
  "arrow",
  "arrow-arith",
@@ -4456,8 +4457,8 @@ dependencies = [
 
 [[package]]
 name = "lance-io"
-version = "5.0.0-beta.5"
-source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-beta.5#d630106da5a238b3adfb8c5dea3b3921f3519945"
+version = "5.0.0-rc.1"
+source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-rc.1#d130b036a62a5d8a904dfbe711d3f7b91b132194"
 dependencies = [
  "arrow",
  "arrow-arith",
@@ -4501,8 +4502,8 @@ dependencies = [
 
 [[package]]
 name = "lance-linalg"
-version = "5.0.0-beta.5"
-source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-beta.5#d630106da5a238b3adfb8c5dea3b3921f3519945"
+version = "5.0.0-rc.1"
+source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-rc.1#d130b036a62a5d8a904dfbe711d3f7b91b132194"
 dependencies = [
  "arrow-array",
  "arrow-buffer",
@@ -4518,8 +4519,8 @@ dependencies = [
 
 [[package]]
 name = "lance-namespace"
-version = "5.0.0-beta.5"
-source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-beta.5#d630106da5a238b3adfb8c5dea3b3921f3519945"
+version = "5.0.0-rc.1"
+source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-rc.1#d130b036a62a5d8a904dfbe711d3f7b91b132194"
 dependencies = [
  "arrow",
  "async-trait",
@@ -4532,8 +4533,8 @@ dependencies = [
 
 [[package]]
 name = "lance-namespace-impls"
-version = "5.0.0-beta.5"
-source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-beta.5#d630106da5a238b3adfb8c5dea3b3921f3519945"
+version = "5.0.0-rc.1"
+source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-rc.1#d130b036a62a5d8a904dfbe711d3f7b91b132194"
 dependencies = [
  "arrow",
  "arrow-ipc",
@@ -4578,8 +4579,8 @@ dependencies = [
 
 [[package]]
 name = "lance-table"
-version = "5.0.0-beta.5"
-source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-beta.5#d630106da5a238b3adfb8c5dea3b3921f3519945"
+version = "5.0.0-rc.1"
+source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-rc.1#d130b036a62a5d8a904dfbe711d3f7b91b132194"
 dependencies = [
  "arrow",
  "arrow-array",
@@ -4618,8 +4619,8 @@ dependencies = [
 
 [[package]]
 name = "lance-testing"
-version = "5.0.0-beta.5"
-source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-beta.5#d630106da5a238b3adfb8c5dea3b3921f3519945"
+version = "5.0.0-rc.1"
+source = "git+https://github.com/lance-format/lance.git?tag=v5.0.0-rc.1#d130b036a62a5d8a904dfbe711d3f7b91b132194"
 dependencies = [
  "arrow-array",
  "arrow-schema",

Cargo.toml

@@ -15,20 +15,20 @@ categories = ["database-implementations"]
 rust-version = "1.91.0"
 
 [workspace.dependencies]
-lance = { "version" = "=5.0.0-beta.5", default-features = false, "tag" = "v5.0.0-beta.5", "git" = "https://github.com/lance-format/lance.git" }
-lance-core = { "version" = "=5.0.0-beta.5", "tag" = "v5.0.0-beta.5", "git" = "https://github.com/lance-format/lance.git" }
-lance-datagen = { "version" = "=5.0.0-beta.5", "tag" = "v5.0.0-beta.5", "git" = "https://github.com/lance-format/lance.git" }
-lance-file = { "version" = "=5.0.0-beta.5", "tag" = "v5.0.0-beta.5", "git" = "https://github.com/lance-format/lance.git" }
-lance-io = { "version" = "=5.0.0-beta.5", default-features = false, "tag" = "v5.0.0-beta.5", "git" = "https://github.com/lance-format/lance.git" }
-lance-index = { "version" = "=5.0.0-beta.5", "tag" = "v5.0.0-beta.5", "git" = "https://github.com/lance-format/lance.git" }
-lance-linalg = { "version" = "=5.0.0-beta.5", "tag" = "v5.0.0-beta.5", "git" = "https://github.com/lance-format/lance.git" }
-lance-namespace = { "version" = "=5.0.0-beta.5", "tag" = "v5.0.0-beta.5", "git" = "https://github.com/lance-format/lance.git" }
-lance-namespace-impls = { "version" = "=5.0.0-beta.5", default-features = false, "tag" = "v5.0.0-beta.5", "git" = "https://github.com/lance-format/lance.git" }
-lance-table = { "version" = "=5.0.0-beta.5", "tag" = "v5.0.0-beta.5", "git" = "https://github.com/lance-format/lance.git" }
-lance-testing = { "version" = "=5.0.0-beta.5", "tag" = "v5.0.0-beta.5", "git" = "https://github.com/lance-format/lance.git" }
-lance-datafusion = { "version" = "=5.0.0-beta.5", "tag" = "v5.0.0-beta.5", "git" = "https://github.com/lance-format/lance.git" }
-lance-encoding = { "version" = "=5.0.0-beta.5", "tag" = "v5.0.0-beta.5", "git" = "https://github.com/lance-format/lance.git" }
-lance-arrow = { "version" = "=5.0.0-beta.5", "tag" = "v5.0.0-beta.5", "git" = "https://github.com/lance-format/lance.git" }
+lance = { "version" = "=5.0.0-rc.1", default-features = false, "tag" = "v5.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
+lance-core = { "version" = "=5.0.0-rc.1", "tag" = "v5.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
+lance-datagen = { "version" = "=5.0.0-rc.1", "tag" = "v5.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
+lance-file = { "version" = "=5.0.0-rc.1", "tag" = "v5.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
+lance-io = { "version" = "=5.0.0-rc.1", default-features = false, "tag" = "v5.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
+lance-index = { "version" = "=5.0.0-rc.1", "tag" = "v5.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
+lance-linalg = { "version" = "=5.0.0-rc.1", "tag" = "v5.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
+lance-namespace = { "version" = "=5.0.0-rc.1", "tag" = "v5.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
+lance-namespace-impls = { "version" = "=5.0.0-rc.1", default-features = false, "tag" = "v5.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
+lance-table = { "version" = "=5.0.0-rc.1", "tag" = "v5.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
+lance-testing = { "version" = "=5.0.0-rc.1", "tag" = "v5.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
+lance-datafusion = { "version" = "=5.0.0-rc.1", "tag" = "v5.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
+lance-encoding = { "version" = "=5.0.0-rc.1", "tag" = "v5.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
+lance-arrow = { "version" = "=5.0.0-rc.1", "tag" = "v5.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
 ahash = "0.8"
 # Note that this one does not include pyarrow
 arrow = { version = "57.2", optional = false }

java/pom.xml

@@ -28,7 +28,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <arrow.version>15.0.0</arrow.version>
-        <lance-core.version>5.0.0-beta.5</lance-core.version>
+        <lance-core.version>5.0.0-rc.1</lance-core.version>
         <spotless.skip>false</spotless.skip>
         <spotless.version>2.30.0</spotless.version>
         <spotless.java.googlejavaformat.version>1.7</spotless.java.googlejavaformat.version>

python/python/lancedb/permutation.py

@@ -284,9 +284,8 @@ class Permutations:
         self.permutation_table = permutation_table
 
         if permutation_table.schema.metadata is not None:
-            split_names = permutation_table.schema.metadata.get(
-                b"split_names", None
-            ).decode("utf-8")
+            raw = permutation_table.schema.metadata.get(b"split_names")
+            split_names = raw.decode("utf-8") if raw is not None else None
             if split_names is not None:
                 self.split_names = json.loads(split_names)
                 self.split_dict = {
@@ -460,9 +459,8 @@ class Permutation:
                         f"Cannot create a permutation on split `{split}`"
                         " because no split names are defined in the permutation table"
                     )
-                split_names = permutation_table.schema.metadata.get(
-                    b"split_names", None
-                ).decode("utf-8")
+                raw = permutation_table.schema.metadata.get(b"split_names")
+                split_names = raw.decode("utf-8") if raw is not None else None
                 if split_names is None:
                     raise ValueError(
                         f"Cannot create a permutation on split `{split}`"

python/python/tests/test_permutation.py

@@ -522,6 +522,50 @@ def test_no_split_names(some_table: Table):
     assert permutations[1].num_rows == 500
 
 
+def test_permutations_metadata_without_split_names_key(mem_db: DBConnection):
+    """Regression: schema metadata present but missing split_names key must not crash.
+
+    Previously, `.get(b"split_names", None).decode()` was called unconditionally,
+    so any permutation table whose metadata dict had other keys but no split_names
+    raised AttributeError: 'NoneType' has no attribute 'decode'.
+    """
+    base = mem_db.create_table("base_nosplit", pa.table({"x": range(10)}))
+
+    # Build a permutation-like table that carries some metadata but NOT split_names.
+    raw = pa.table(
+        {
+            "row_id": pa.array(range(10), type=pa.uint64()),
+            "split_id": pa.array([0] * 10, type=pa.uint32()),
+        }
+    ).replace_schema_metadata({b"other_key": b"other_value"})
+    perm_tbl = mem_db.create_table("perm_nosplit", raw)
+
+    permutations = Permutations(base, perm_tbl)
+    assert permutations.split_names == []
+    assert permutations.split_dict == {}
+
+
+def test_from_tables_string_split_missing_names_key(mem_db: DBConnection):
+    """Regression: from_tables() with a string split must raise ValueError, not
+    AttributeError.
+
+    Previously, `.get(b"split_names", None).decode()` crashed with AttributeError
+    when the metadata dict existed but had no split_names key.
+    """
+    base = mem_db.create_table("base_strsplit", pa.table({"x": range(10)}))
+
+    raw = pa.table(
+        {
+            "row_id": pa.array(range(10), type=pa.uint64()),
+            "split_id": pa.array([0] * 10, type=pa.uint32()),
+        }
+    ).replace_schema_metadata({b"other_key": b"other_value"})
+    perm_tbl = mem_db.create_table("perm_strsplit", raw)
+
+    with pytest.raises(ValueError, match="no split names are defined"):
+        Permutation.from_tables(base, perm_tbl, split="train")
+
+
 @pytest.fixture
 def some_perm_table(some_table: Table) -> Table:
     return (