feat: parallelize parquet load by row group#24808
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Plan Parquet LOAD around file and row-group fanout, carry shard metadata through ExternalScan, and keep S3 prefetch behavior bounded for sharded readers. Harden unsupported option handling, add Parquet profile stats, and cover compile/runtime/BVT regressions for schema, conversion, rollback, and parallel-load paths.
iamlinjunhong
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XuPeng-SH,
aunjgr,
heni02 and
ouyuanning
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Add the missing DATE32 Parquet resource used by load_data_parquet.sql so the 4.0-dev BVT can load the cherry-picked date32-to-DATETIME case instead of failing on a missing file.
ouyuanning
approved these changes
Jun 3, 2026
heni02
approved these changes
Jun 3, 2026
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What type of PR is this?
Which issue(s) this PR fixes:
issue #24254
What this PR does / why we need it:
Plan Parquet LOAD around file and row-group fanout, carry shard metadata through ExternalScan, and keep S3 prefetch behavior bounded for sharded readers.
Harden unsupported option handling, add Parquet profile stats, and cover compile/runtime/BVT regressions for schema, conversion, rollback, and parallel-load paths.