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Author SHA1 Message Date
Jack Ye 6416840c33 test: update python expectations for lance 9.1 2026-07-16 13:46:54 -07:00
Jack Ye b030361d86 test: relax hash split distribution assertions 2026-07-16 10:45:35 -07:00
lancedb automation 325cab394b chore: update lance dependency to v9.1.0-beta.2 2026-07-16 10:45:05 -07:00
7 changed files with 110 additions and 86 deletions
Generated
+42 -42
View File
@@ -3421,8 +3421,8 @@ checksum = "42703706b716c37f96a77aea830392ad231f44c9e9a67872fa5548707e11b11c"
[[package]]
name = "fsst"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrow-array",
"rand 0.9.5",
@@ -4777,8 +4777,8 @@ checksum = "e037a2e1d8d5fdbd49b16a4ea09d5d6401c1f29eca5ff29d03d3824dba16256a"
[[package]]
name = "lance"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arc-swap",
"arrow",
@@ -4852,8 +4852,8 @@ dependencies = [
[[package]]
name = "lance-arrow"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrow-array",
"arrow-buffer",
@@ -4875,7 +4875,7 @@ dependencies = [
[[package]]
name = "lance-arrow-scalar"
version = "58.0.0"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrow-array",
"arrow-buffer",
@@ -4889,7 +4889,7 @@ dependencies = [
[[package]]
name = "lance-arrow-stats"
version = "58.0.0"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrow-array",
"arrow-schema",
@@ -4898,8 +4898,8 @@ dependencies = [
[[package]]
name = "lance-bitpacking"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrayref",
"crunchy",
@@ -4909,8 +4909,8 @@ dependencies = [
[[package]]
name = "lance-core"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrow-array",
"arrow-buffer",
@@ -4948,8 +4948,8 @@ dependencies = [
[[package]]
name = "lance-datafusion"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrow",
"arrow-array",
@@ -4979,8 +4979,8 @@ dependencies = [
[[package]]
name = "lance-datagen"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrow",
"arrow-array",
@@ -4997,8 +4997,8 @@ dependencies = [
[[package]]
name = "lance-derive"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"proc-macro2",
"quote",
@@ -5007,8 +5007,8 @@ dependencies = [
[[package]]
name = "lance-encoding"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrow-arith",
"arrow-array",
@@ -5043,8 +5043,8 @@ dependencies = [
[[package]]
name = "lance-file"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrow-arith",
"arrow-array",
@@ -5074,8 +5074,8 @@ dependencies = [
[[package]]
name = "lance-index"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arc-swap",
"arrow",
@@ -5141,8 +5141,8 @@ dependencies = [
[[package]]
name = "lance-index-core"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrow-array",
"arrow-schema",
@@ -5164,8 +5164,8 @@ dependencies = [
[[package]]
name = "lance-io"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrow",
"arrow-arith",
@@ -5208,8 +5208,8 @@ dependencies = [
[[package]]
name = "lance-linalg"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrow-array",
"arrow-buffer",
@@ -5225,8 +5225,8 @@ dependencies = [
[[package]]
name = "lance-namespace"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrow",
"async-trait",
@@ -5238,8 +5238,8 @@ dependencies = [
[[package]]
name = "lance-namespace-impls"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrow",
"arrow-ipc",
@@ -5293,8 +5293,8 @@ dependencies = [
[[package]]
name = "lance-select"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrow-array",
"arrow-buffer",
@@ -5309,8 +5309,8 @@ dependencies = [
[[package]]
name = "lance-table"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrow",
"arrow-array",
@@ -5349,8 +5349,8 @@ dependencies = [
[[package]]
name = "lance-testing"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"arrow-array",
"arrow-schema",
@@ -5363,8 +5363,8 @@ dependencies = [
[[package]]
name = "lance-tokenizer"
version = "9.0.0-rc.1"
source = "git+https://github.com/lance-format/lance.git?tag=v9.0.0-rc.1#cec0b7dffe2d85c7e66dbe9d1f3891c297903a1d"
version = "9.1.0-beta.2"
source = "git+https://github.com/lance-format/lance.git?tag=v9.1.0-beta.2#9139486ed371dd6caeb9c708b39fba7f5649a9b0"
dependencies = [
"icu_segmenter",
"jieba-rs",
+14 -14
View File
@@ -13,20 +13,20 @@ categories = ["database-implementations"]
rust-version = "1.91.0"
[workspace.dependencies]
lance = { "version" = "=9.0.0-rc.1", default-features = false, "tag" = "v9.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
lance-core = { "version" = "=9.0.0-rc.1", "tag" = "v9.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
lance-datagen = { "version" = "=9.0.0-rc.1", "tag" = "v9.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
lance-file = { "version" = "=9.0.0-rc.1", "tag" = "v9.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
lance-io = { "version" = "=9.0.0-rc.1", default-features = false, "tag" = "v9.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
lance-index = { "version" = "=9.0.0-rc.1", "tag" = "v9.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
lance-linalg = { "version" = "=9.0.0-rc.1", "tag" = "v9.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
lance-namespace = { "version" = "=9.0.0-rc.1", "tag" = "v9.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
lance-namespace-impls = { "version" = "=9.0.0-rc.1", default-features = false, "tag" = "v9.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
lance-table = { "version" = "=9.0.0-rc.1", "tag" = "v9.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
lance-testing = { "version" = "=9.0.0-rc.1", "tag" = "v9.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
lance-datafusion = { "version" = "=9.0.0-rc.1", "tag" = "v9.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
lance-encoding = { "version" = "=9.0.0-rc.1", "tag" = "v9.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
lance-arrow = { "version" = "=9.0.0-rc.1", "tag" = "v9.0.0-rc.1", "git" = "https://github.com/lance-format/lance.git" }
lance = { "version" = "=9.1.0-beta.2", default-features = false, "tag" = "v9.1.0-beta.2", "git" = "https://github.com/lance-format/lance.git" }
lance-core = { "version" = "=9.1.0-beta.2", "tag" = "v9.1.0-beta.2", "git" = "https://github.com/lance-format/lance.git" }
lance-datagen = { "version" = "=9.1.0-beta.2", "tag" = "v9.1.0-beta.2", "git" = "https://github.com/lance-format/lance.git" }
lance-file = { "version" = "=9.1.0-beta.2", "tag" = "v9.1.0-beta.2", "git" = "https://github.com/lance-format/lance.git" }
lance-io = { "version" = "=9.1.0-beta.2", default-features = false, "tag" = "v9.1.0-beta.2", "git" = "https://github.com/lance-format/lance.git" }
lance-index = { "version" = "=9.1.0-beta.2", "tag" = "v9.1.0-beta.2", "git" = "https://github.com/lance-format/lance.git" }
lance-linalg = { "version" = "=9.1.0-beta.2", "tag" = "v9.1.0-beta.2", "git" = "https://github.com/lance-format/lance.git" }
lance-namespace = { "version" = "=9.1.0-beta.2", "tag" = "v9.1.0-beta.2", "git" = "https://github.com/lance-format/lance.git" }
lance-namespace-impls = { "version" = "=9.1.0-beta.2", default-features = false, "tag" = "v9.1.0-beta.2", "git" = "https://github.com/lance-format/lance.git" }
lance-table = { "version" = "=9.1.0-beta.2", "tag" = "v9.1.0-beta.2", "git" = "https://github.com/lance-format/lance.git" }
lance-testing = { "version" = "=9.1.0-beta.2", "tag" = "v9.1.0-beta.2", "git" = "https://github.com/lance-format/lance.git" }
lance-datafusion = { "version" = "=9.1.0-beta.2", "tag" = "v9.1.0-beta.2", "git" = "https://github.com/lance-format/lance.git" }
lance-encoding = { "version" = "=9.1.0-beta.2", "tag" = "v9.1.0-beta.2", "git" = "https://github.com/lance-format/lance.git" }
lance-arrow = { "version" = "=9.1.0-beta.2", "tag" = "v9.1.0-beta.2", "git" = "https://github.com/lance-format/lance.git" }
ahash = "0.8"
# Note that this one does not include pyarrow
arrow = { version = "58.0.0", optional = false }
+1 -1
View File
@@ -28,7 +28,7 @@
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<arrow.version>15.0.0</arrow.version>
<lance-core.version>9.0.0-rc.1</lance-core.version>
<lance-core.version>9.1.0-beta.2</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>
+11 -11
View File
@@ -3875,18 +3875,18 @@ class AsyncHybridQuery(AsyncStandardQuery, AsyncVectorQueryBase):
>>> asyncio.run(doctest_example()) # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
RRFReranker(K=60)
ProjectionExec: expr=[vector@0 as vector, text@3 as text, _distance@2 as _distance]
Take: columns="vector, _rowid, _distance, (text)"
CoalesceBatchesExec: target_batch_size=1024
GlobalLimitExec: skip=0, fetch=10
FilterExec: _distance@2 IS NOT NULL
SortExec: TopK(fetch=10), expr=[_distance@2 ASC NULLS LAST, _rowid@1 ASC NULLS LAST], preserve_partitioning=[false]
KNNVectorDistance: metric=l2
LanceRead: uri=..., projection=[vector], ...
Take: columns="vector, _rowid, _distance, (text)"
CoalesceBatchesExec: target_batch_size=1024
GlobalLimitExec: skip=0, fetch=10
FilterExec: _distance@2 IS NOT NULL
SortExec: TopK(fetch=10), expr=[_distance@2 ASC NULLS LAST, _rowid@1 ASC NULLS LAST], preserve_partitioning=[false]
KNNVectorDistance: metric=l2
LanceRead: uri=..., projection=[vector], ...
ProjectionExec: expr=[vector@2 as vector, text@3 as text, _score@1 as _score]
Take: columns="_rowid, _score, (vector), (text)"
CoalesceBatchesExec: target_batch_size=1024
GlobalLimitExec: skip=0, fetch=10
MatchQuery: column=text, query=hello
Take: columns="_rowid, _score, (vector), (text)"
CoalesceBatchesExec: target_batch_size=1024
GlobalLimitExec: skip=0, fetch=10
MatchQuery: column=text, query=[hello]
Parameters
----------
+13 -4
View File
@@ -128,9 +128,16 @@ def test_split_hash(mem_db):
def test_split_hash_with_discard(mem_db):
"""Test hash-based splitting with discard weight."""
total_rows = 1000
tbl = mem_db.create_table(
"test_table",
pa.table({"id": range(100), "category": ["A", "B"] * 50, "value": range(100)}),
pa.table(
{
"id": range(total_rows),
"category": [f"category-{i}" for i in range(total_rows)],
"value": range(total_rows),
}
),
)
permutation_tbl = (
@@ -142,10 +149,12 @@ def test_split_hash_with_discard(mem_db):
.execute()
)
# Should have fewer than 100 rows due to discard
# Should have fewer rows due to discard, but should not be empty.
row_count = permutation_tbl.count_rows()
assert row_count < 100
assert row_count > 0 # But not empty
assert 0 < row_count < total_rows
data = permutation_tbl.search(None).to_arrow().to_pydict()
assert set(data["split_id"]) == {0, 1}
def test_split_sequential(mem_db):
+4 -4
View File
@@ -1273,7 +1273,7 @@ async def test_explain_plan_fts(table_async: AsyncTable):
query = await table_async.search("dog", query_type="fts", fts_columns="text")
plan = await query.explain_plan()
# Should show FTS details (issue #2465 is now fixed)
assert "MatchQuery: column=text, query=dog" in plan
assert "MatchQuery: column=text, query=[dog]" in plan
assert "GlobalLimitExec" in plan # Default limit
# Test FTS query with limit
@@ -1281,7 +1281,7 @@ async def test_explain_plan_fts(table_async: AsyncTable):
"dog", query_type="fts", fts_columns="text"
)
plan_with_limit = await query_with_limit.limit(1).explain_plan()
assert "MatchQuery: column=text, query=dog" in plan_with_limit
assert "MatchQuery: column=text, query=[dog]" in plan_with_limit
assert "GlobalLimitExec: skip=0, fetch=1" in plan_with_limit
# Test FTS query with offset and limit
@@ -1289,7 +1289,7 @@ async def test_explain_plan_fts(table_async: AsyncTable):
"dog", query_type="fts", fts_columns="text"
)
plan_with_offset = await query_with_offset.offset(1).limit(1).explain_plan()
assert "MatchQuery: column=text, query=dog" in plan_with_offset
assert "MatchQuery: column=text, query=[dog]" in plan_with_offset
assert "GlobalLimitExec: skip=1, fetch=1" in plan_with_offset
@@ -1333,7 +1333,7 @@ async def test_explain_plan_with_filters(table_async: AsyncTable):
"dog", query_type="fts", fts_columns="text"
)
plan_fts_filter = await query_fts_filter.where("id = 1").explain_plan()
assert "MatchQuery: column=text, query=dog" in plan_fts_filter
assert "MatchQuery: column=text, query=[dog]" in plan_fts_filter
assert "LanceRead" in plan_fts_filter
assert "full_filter=id = Int64(1)" in plan_fts_filter # Should show filter details
@@ -761,8 +761,8 @@ mod tests {
verify_splitter(splitter, test_data(), 50, &[11, 8, 9], false).await;
}
#[tokio::test]
async fn test_hash_split() {
async fn collect_hash_split() -> RecordBatch {
let total_rows = 50;
let data = lance_datagen::gen_batch()
.with_seed(Seed::from(42))
.col(
@@ -783,7 +783,7 @@ mod tests {
);
let split_batches = splitter
.apply(data, 10)
.apply(data, total_rows)
.await
.unwrap()
.try_collect::<Vec<_>>()
@@ -791,20 +791,35 @@ mod tests {
.unwrap();
let schema = split_batches[0].schema();
let split_batch = concat_batches(&schema, &split_batches).unwrap();
concat_batches(&schema, &split_batches).unwrap()
}
// These assertions are all based on fixed seed in data generation but they match
// up roughly to what we expect (25% discarded, 25% in split 0, 50% in split 1)
#[tokio::test]
async fn test_hash_split() {
let total_rows = 50;
let split_batch = collect_hash_split().await;
let split_batch_again = collect_hash_split().await;
// 8 rows (16%) are discarded because discard_weight is 1
assert_eq!(split_batch.num_rows(), 42);
assert_eq!(split_batch.num_rows(), split_batch_again.num_rows());
assert_eq!(split_batch.num_columns(), split_batch_again.num_columns());
for (left, right) in split_batch
.columns()
.iter()
.zip(split_batch_again.columns().iter())
{
assert_eq!(left, right);
}
assert!(split_batch.num_rows() > 0);
assert!(split_batch.num_rows() < total_rows);
assert_eq!(split_batch.num_columns(), 2);
let split_ids = split_batch.column(1).as_primitive::<UInt64Type>().values();
let num_in_split_0 = split_ids.iter().filter(|v| **v == 0).count();
let num_in_split_1 = split_ids.iter().filter(|v| **v == 1).count();
assert_eq!(num_in_split_0, 12); // 24%
assert_eq!(num_in_split_1, 30); // 60%
assert_eq!(num_in_split_0 + num_in_split_1, split_batch.num_rows());
assert!(num_in_split_0 > 0);
assert!(num_in_split_1 > num_in_split_0);
}
}