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2 changes: 2 additions & 0 deletions bigframes/session/__init__.py
Original file line number Diff line number Diff line change
Expand Up @@ -1833,6 +1833,8 @@ def _start_query(
Starts BigQuery query job and waits for results.
"""
job_config = self._prepare_query_job_config(job_config)
if not self._strictly_ordered:
job_config.labels = {"bigframes-mode": "unordered"}
try:
return bigframes.session._io.bigquery.start_query_with_client(
self,
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9 changes: 9 additions & 0 deletions tests/system/small/test_unordered.py
Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,15 @@
from tests.system.utils import assert_pandas_df_equal, skip_legacy_pandas


def test_unordered_mode_job_label(unordered_session):
pd_df = pd.DataFrame({"a": [1, 2, 3], "b": [4, 5, 6]}, dtype=pd.Int64Dtype())
df = bpd.DataFrame(pd_df, session=unordered_session)
df.to_pandas()
job_labels = df.query_job.labels # type:ignore
assert "bigframes-mode" in job_labels
assert job_labels["bigframes-mode"] == "unordered"


def test_unordered_mode_cache_aggregate(unordered_session):
pd_df = pd.DataFrame({"a": [1, 2, 3], "b": [4, 5, 6]}, dtype=pd.Int64Dtype())
df = bpd.DataFrame(pd_df, session=unordered_session)
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