[python] Add IncrementalDiff acceptance tests and streaming API docs#7436
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JingsongLi merged 4 commits intoapache:masterfrom Mar 17, 2026
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Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
test_streaming_catch_up_returns_same_data is covered by the unit test test_stream_triggers_diff_catch_up_for_large_gap with stronger assertions. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
to_arrow([]) already returns an empty Arrow table with the correct schema, so the early return was dead code. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Mar 16, 2026
paimon-python/pypaimon/acceptance/incremental_diff_acceptance_test.py
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create_splits([]) returns [] and to_arrow([]) returns an empty table, so the early return was unnecessary. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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What does this PR do?
Final PR in the Python streaming read stack (#7152). Adds end-to-end acceptance tests for
IncrementalDiffScannerand user-facing documentation for the streaming read API.Acceptance tests (
pypaimon/acceptance/incremental_diff_acceptance_test.py):IncrementalDiffScannerproduces correct row counts and data across snapshot pairsStreaming API docs (
docs/content/pypaimon/python-api.md):StreamReadBuilder,AsyncStreamingTableScan, consumer ID usage, row kind, bucket filtering, and diff catch-up behaviourStacked on
This PR targets
masterdirectly (all prior PRs in the stack have merged).Stack summary:
python-streaming-1a-caching— mergedpython-streaming-1b-scanners— mergedpython-streaming-1b2-row-kind— mergedpython-streaming-1c-consumer— mergedpython-streaming-consumer-manager— mergedpython-streaming-2a-changelog-producer— openpython-streaming-2b-snapshot-lookahead— openpython-streaming-2c-scan-and-builder— mergedpython-streaming-2d-consumer— mergedpython-streaming-2e-acceptance-docsTracking issue: #7152