Anton Lykov created SPARK-56626:
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Summary: Introduce SupportsReportCatalogStatistics mixin for Table
Key: SPARK-56626
URL: https://issues.apache.org/jira/browse/SPARK-56626
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 4.2.0
Reporter: Anton Lykov
Today DSv2 connectors can only report table-level statistics through
`Scan.estimateStatistics()`, which conflates catalog-level (pre-filter) and
scan-level (post-pushdown) stats and forces construction of a `ScanBuilder`
just to read them —
potentially triggering file listing or remote metadata round-trips. This
proposes a new `@Evolving` `Table` mix-in `SupportsReportCatalogStatistics`
that exposes table-wide, scan-independent statistics, analogous to DSv1's
`CatalogStatistics`.
It is complementary to `Scan.SupportsReportStatistics`; a table may
implement both. See the PR for details.
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