[python] Add paimon tail CLI for streaming table reads#7344
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tub wants to merge 3 commits intoapache:masterfrom
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[python] Add paimon tail CLI for streaming table reads#7344tub wants to merge 3 commits intoapache:masterfrom
tub wants to merge 3 commits intoapache:masterfrom
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…sharding Add foundational infrastructure for pure-Python streaming reads: - Follow-up scanners (delta, changelog, incremental diff) for continuous snapshot polling - Consumer manager for persisting read progress - LRU caching for snapshots, manifests, and manifest lists - Batch existence checks for efficient file IO - Bucket-based sharding for parallel consumption - Row kind support in table reads - Streaming-related core options - Backtick support for identifier parsing Includes unit tests for all new components.
…ation Add core streaming read API: - StreamReadBuilder for configuring streaming reads with predicates, projections, consumer IDs, sharding, and poll intervals - AsyncStreamingTableScan with async generator and sync wrapper for continuous snapshot polling - Table interface additions: new_stream_read_builder() on Table, FileStoreTable, FormatTable (stub), IcebergTable (stub) - Minor fix in split_read.py - Add oss/lance extras to setup.py - Streaming reads documentation and supported features list Includes streaming table scan and sharding unit tests.
Add command-line interface for streaming Paimon table data: - paimon tail command: stream data from tables similar to kafka-console-consumer, with support for multiple output formats (jsonl, json, csv, table), filtering, column projection, consumer IDs, flexible start position (earliest, latest, snapshot:ID, time:-1h), and --to end position - CLI utilities for time parsing and output formatting - console_scripts entry point in setup.py - CLI documentation and supported features list Includes CLI utility tests.
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Summary
This PR is an optional addition to the python streaming feature - I just found it useful for debugging data issues locally without having to run Flink or Spark.
PR 3 of 3 for pure-Python streaming reads. This PR adds the
paimon tailCLI command:paimon tail: stream data from Paimon tables, similar tokafka-console-consumerearliest,latest,snapshot:ID,time:-1h--toend position for bounded reads--followfor continuous streamingconsole_scriptsentry point in setup.py7 files changed, +1396 lines (incremental)
PR Stack
paimon tailcommand)Incremental diff (just this PR's changes): python-streaming-2-core...tub:paimon:python-streaming-3-cli
Merge workflow: Merge PR 1, rebase PR 2 onto updated master (PR 1 commits drop out), merge PR 2, repeat for PR 3.
Test plan
python -m pytest pypaimon/tests— 630 passed (9 pre-existing lance failures)python -c "from pypaimon import CatalogFactory"— no import errors🤖 Generated with Claude Code