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Title: fix: support melting empty DataFrames without crashing by shuoweil · Pull Request #2509 · googleapis/python-bigquery-dataframes · GitHub

Open Graph Title: fix: support melting empty DataFrames without crashing by shuoweil · Pull Request #2509 · googleapis/python-bigquery-dataframes

X Title: fix: support melting empty DataFrames without crashing by shuoweil · Pull Request #2509 · googleapis/python-bigquery-dataframes

Description: Allows alignment melts over zero-row offset layouts Fixes #<452681068> 🦕

Open Graph Description: Allows alignment melts over zero-row offset layouts Fixes #<452681068> 🦕

X Description: Allows alignment melts over zero-row offset layouts Fixes #<452681068> 🦕

Opengraph URL: https://github.com/googleapis/python-bigquery-dataframes/pull/2509

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f8241d7 fix: handle empty selections inside unpivot and melt layout arrays shuoweil Mar 11, 2026 https://github.com/googleapis/python-bigquery-dataframes/pull/2509/commits/f8241d771514846bd99a47f7040afbfd3bf9c8c7
d956453 chore: address PR review comments shuoweil Mar 20, 2026 https://github.com/googleapis/python-bigquery-dataframes/pull/2509/commits/d956453bc9f41b45a4bbd173b3bb951a5b033b54
b6dcfec test: add test_count_empty_multiindex_columns shuoweil Mar 20, 2026 https://github.com/googleapis/python-bigquery-dataframes/pull/2509/commits/b6dcfec450f0ae20f12004d3a8a75decc82683e0
27ed0f2 test: move test_dataframe_melt_multiindex per PR feedback shuoweil Mar 20, 2026 https://github.com/googleapis/python-bigquery-dataframes/pull/2509/commits/27ed0f2e3eff480230fe8979a2efa2c70c25f707
00dbe35 fix: flatten untyped recursive NULL casts in bq compiler shuoweil Mar 20, 2026 https://github.com/googleapis/python-bigquery-dataframes/pull/2509/commits/00dbe351c664e72616e59ec09ae80304e4a0a4e1
7682f7d fix: apply typed NULL to unpivot for empty columns shuoweil Mar 20, 2026 https://github.com/googleapis/python-bigquery-dataframes/pull/2509/commits/7682f7dd964dbac23b65b6ee1042d385e3960cf9
156603c test: add test case for empty multiindex unpivot bypassing struct com… shuoweil Mar 20, 2026 https://github.com/googleapis/python-bigquery-dataframes/pull/2509/commits/156603cd879d099ff07c7e590f71ba93fd62d219
24818f1 Merge branch 'main' into shuowei-fix-unpivot-empty shuoweil Mar 20, 2026 https://github.com/googleapis/python-bigquery-dataframes/pull/2509/commits/24818f1193859b2c8a21655a26df859d8a206728
31b285e revert: flatten untyped recursive NULL casts in bq compiler shuoweil Mar 20, 2026 https://github.com/googleapis/python-bigquery-dataframes/pull/2509/commits/31b285e14d4d89c68d7fbbd2a5911c4834c9dca5
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