[spark] Recompute bucket number for postpone overwrite - #9051
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JingsongLi merged 1 commit intoAug 6, 2026
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Ignore the previous bucket layout for overwrite writes and infer the fixed bucket number from the newly staged batch. Co-Authored-By: Claude Code <noreply@anthropic.com> AI-Model: gpt-5 AI-Contributed/Feature: 27/27 AI-Contributed/UT: 33/33
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Purpose
INSERT OVERWRITE removes the previous contents, so the existing bucket layout should not constrain the replacement data.
This change skips loading existing bucket metadata for overwrite and infers the fixed bucket number from the newly staged batch. Append and rescale behavior remain unchanged.
Tests
PostponeBucketTableTest: 28 tests passed.