alamb commented on PR #156:
URL: https://github.com/apache/parquet-site/pull/156#issuecomment-3872308313
> It's been pointed out to me that the coverage matrix doesn't cover
statistics/geometry bounding, without which predicate pushdown doesn't work:
every rowgroup with the column needs scanning.
> "Geospatial support in Parquet is still ongoing; as of February 2026
columns statistics collection is incomplete, which means that scanning some
types may require reading all the data. Furthermore the query engines
themselves need to adopt the new format extensions."
Maybe a more accurate summary is that the column statistics collection is
not yet fully integrated into all engines.
FWIW the Rust Parquet implementation does handle such statistics (thanks to
@kylebarron and @paleolimbot as I recall) --
https://docs.rs/parquet/latest/parquet/format/struct.GeospatialStatistics.html,
and I think SedonaDB has already integrated it into their query engine as well.
Perhaps we can add a line to the
https://parquet.apache.org/docs/file-format/implementationstatus/ page for
these (doing so seems to have the effect of pressuring additional ecosystem
adoption)
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