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fix: Read all source columns in BigQuery pulls when the feature list is empty - #7048

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feast-dev:masterfrom
Mrun25:fix-bigquery-empty-feature-cols-7047
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Mrun25 wants to merge 1 commit into
feast-dev:masterfrom
Mrun25:fix-bigquery-empty-feature-cols-7047

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@Mrun25

@Mrun25 Mrun25 commented Oct 20, 2026

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What this PR does / why we need it:

FeatureBuilder.get_column_info signals "read all source columns" for BatchFeatureViews with a pandas/python (or ray/flink) UDF by passing an empty feature_name_columns list. BigQueryOfflineStore.pull_all_from_table_or_query and pull_latest_from_table_or_query did not handle the empty case: they built the select list from join keys + feature columns + timestamps, so the generated query selected only the join keys and timestamps. Materializing such a view from BigQuery then failed with ValueError: Column <feature> not found in table because the UDF never received the source columns.

This PR handles the empty list the way the other offline stores do:

  • pull_all_from_table_or_query: SELECT *
  • pull_latest_from_table_or_query: SELECT * in the inner query and SELECT * EXCEPT(_feast_row) in the outer query, so the ROW_NUMBER helper column is not exposed

Explicit (non-empty) feature lists are unchanged. Adds regression tests for both pull paths.

Which issue(s) this PR fixes:

Fixes #7047

Testing

  • New unit tests test_pull_all_empty_feature_columns_selects_all and test_pull_latest_empty_feature_columns_selects_all in tests/unit/infra/offline_stores/test_bigquery.py
  • Full test_bigquery.py + test_bigquery_non_entity_mode.py suites pass locally (38 passed)
  • ruff check and ruff format --check clean

…mpty

BigQueryOfflineStore.pull_all_from_table_or_query and
pull_latest_from_table_or_query built their SELECT list from the join
keys, feature columns, and timestamps only. FeatureBuilder signals
"read all source columns" for BatchFeatureViews with a pandas/python
UDF by passing an empty feature_name_columns list, so the generated
query selected only the join keys and timestamps and materialization
failed with "Column <feature> not found in table".

Handle the empty list the way the other offline stores do: select all
columns (SELECT * in pull_all; SELECT * in the inner query and
SELECT * EXCEPT(_feast_row) in the outer query of pull_latest, which
uses a ROW_NUMBER helper column).

Fixes feast-dev#7047

Signed-off-by: Mrun25 <[email protected]>
@Mrun25
Mrun25 requested review from a team and sudohainguyen as code owners October 20, 2026 04:25
Copilot AI balanced review requested due to automatic review settings October 20, 2026 04:25

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.99%. Comparing base (e304a84) to head (a774762).
⚠️ Report is 7 commits behind head on master.
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@@           Coverage Diff           @@
##           master    #7048   +/-   ##
=======================================
  Coverage   50.99%   50.99%           
=======================================
  Files         455      455           
  Lines       56994    56999    +5     
  Branches     8321     8323    +2     
=======================================
+ Hits        29063    29067    +4     
  Misses      25946    25946           
- Partials     1985     1986    +1     
Flag Coverage Δ
go-feature-server 30.58% <ø> (ø)
python-unit 52.45% <100.00%> (+<0.01%) ⬆️
Files with missing lines Coverage Δ
sdk/python/feast/infra/offline_stores/bigquery.py 49.20% <100.00%> (+0.40%) ⬆️

... and 1 file with indirect coverage changes


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@Mrun25 Mrun25 changed the title fix: read all source columns in BigQuery pulls when the feature list is empty fix: Read all source columns in BigQuery pulls when the feature list is empty Nov 4, 2026

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BigQuery offline store: materializing a BatchFeatureView with a pandas/python UDF fails with Column <feature> not found in table

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