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fix(published): a table's extent and count from its manifests, not a scan of every file - #172
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…scan of every file `Table.open` learned its extent with `min/max/count(*)` over `iceberg_scan`, which reads every data file's footer: a request per file, on every open, of every reader. A log that publishes every few minutes grows thousands of small files, and one open took 20+ s from a laptop and minutes on a loaded box. The three numbers are in the manifests' per-file statistics (record counts and the offset column's bounds), one read of the manifest list and one per manifest. Falls back to the scan when the statistics cannot answer exactly: a file without bounds on the offset column, or a delete file. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01PXyESUWnfYF3jXPHp7pz12
This was referenced Oct 20, 2026
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The fix shipped on the 0.22 line as 0.22.1 (#171), for main.
Table.openranmin/max/count(*)overiceberg_scan, reading every data file's footer on every snapshot open (553 files: 20+ s, minutes on a loaded box). The numbers now come from the manifests' per-file statistics, with the scan as fallback when a file lacks bounds or a delete file exists. Test pins equality with the scan and thatopennever issues it.🤖 Generated with Claude Code
https://claude.ai/code/session_01PXyESUWnfYF3jXPHp7pz12