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feat: TABLESAMPLE SYSTEM end-to-end + row-group / row sampling on ParquetSource - #22000

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adriangb wants to merge 4 commits into

apache:mainfrom

pydantic:parquet-sampling

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feat: TABLESAMPLE SYSTEM end-to-end + row-group / row sampling on ParquetSource#22000
adriangb wants to merge 4 commits into
apache:mainfrom
pydantic:parquet-sampling

Commits on May 6, 2026
- feat(parquet): row-group and row-range sampling on ParquetSource
  
  adriangb
  and
  claude
  committed
  d4b564a
- feat: SamplePushdown rule + Sample logical/physical nodes
  
  adriangb
  and
  claude
  committed
  f9182fb
- feat: TableSampleSystemPlanner — TABLESAMPLE SYSTEM works out of the box
  
  adriangb
  and
  claude
  committed
  0929f1d
- example: rework TABLESAMPLE example to compose with built-in SYSTEM
  
  adriangb
  and
  claude
  committed
  d1def87