Add ranged-read support to PinotFS#18861
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Add additive default methods openForRead(uri, offset, length) and supportsRangedRead() to the PinotFS SPI. Defaults throw / return false so existing implementations are unaffected. Implement for LocalPinotFS (via RandomAccessFile) and GcsPinotFS (via ReadChannel seek/limit), enabling targeted reads of byte ranges (e.g. Parquet footers and column chunks) without downloading whole objects. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Add additive default methods openForRead(uri, offset, length) and supportsRangedRead() to the PinotFS SPI (default-throws / false, so existing implementations are unaffected). Implemented for LocalPinotFS (RandomAccessFile) and GcsPinotFS (ReadChannel seek/limit), enabling targeted byte-range reads (e.g. Parquet footers and column chunks) without downloading whole objects. Upstream PR: apache#18861 (open) Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Codecov Report❌ Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## master #18861 +/- ##
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- Coverage 64.79% 37.16% -27.64%
+ Complexity 1322 1321 -1
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Files 3393 3393
Lines 211265 211292 +27
Branches 33212 33216 +4
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- Hits 136896 78519 -58377
- Misses 63320 125570 +62250
+ Partials 11049 7203 -3846
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Description
Adds an additive ranged-read capability to the PinotFS SPI so callers can read a specific byte range of a file without downloading the whole object.
implementations remain source- and binary-compatible — no behavior change unless an implementation opts in.
Motivation
Enables targeted reads of file regions (e.g. Parquet footers and column chunks) for engines/plugins that query columnar data in place, avoiding full-object transfers.
Testing
LocalPinotFSTest covers mid-range, from-start, EOF truncation, zero-length, whole-file, and invalid-argument cases (runs in CI). GcsPinotFSTest adds a ranged-read case (credentials-gated, consistent with the existing GCS integration test).
PR Tags
featureperformancerelease-notes: