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Merged
westonpace merged 1 commit into from
Dec 15, 2025
Merged

ci: update tpc-h dataset generation to use less ram #5477

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16 changes: 11 additions & 5 deletions python/python/ci_benchmarks/datagen/lineitems.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,9 @@

# Creates a dataset containing the TPC-H lineitems table using a prebuilt Parquet file

import shutil
import tempfile

import duckdb
import lance
from lance.log import LOGGER
Expand All @@ -12,24 +15,25 @@
NUM_ROWS = 59986052


def _gen_data(scale_factor: int):
def _gen_data(tmpdir: str, scale_factor: int):
LOGGER.info("Using DuckDB to generate TPC-H dataset")
con = duckdb.connect(database=":memory:")
con = duckdb.connect(f"{tmpdir}/tpch-scale-factor-{scale_factor}.db")
con.execute("INSTALL tpch; LOAD tpch")
con.execute(f"CALL dbgen(sf={scale_factor})")
res = con.query("SELECT * FROM lineitem")
return res.to_arrow_table()
return res.fetch_arrow_reader()


def _create(dataset_uri: str, data_storage_version: str, scale_factor: int = 10):
tmpdir = tempfile.mkdtemp(prefix=f"tpch-scale-factor-{scale_factor}-")
try:
ds = lance.dataset(dataset_uri)
print(ds.count_rows())
if ds.count_rows() == NUM_ROWS:
return
elif ds.count_rows() == 0:
ds = lance.write_dataset(
_gen_data(scale_factor),
_gen_data(tmpdir, scale_factor),
dataset_uri,
mode="append",
data_storage_version=data_storage_version,
Expand All @@ -42,11 +46,13 @@ def _create(dataset_uri: str, data_storage_version: str, scale_factor: int = 10)
)
except ValueError:
ds = lance.write_dataset(
_gen_data(scale_factor),
_gen_data(tmpdir, scale_factor),
dataset_uri,
mode="create",
data_storage_version=data_storage_version,
)
finally:
shutil.rmtree(tmpdir)
return ds


Expand Down