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Iceberg v4 Stats-Only Fields: How Tables Store Statistics for Partition Expressions, and Why tight_stats Replaced tight_bounds

Iceberg v4 Stats-Only Fields: How Tables Store Statistics for Partition Expressions, and Why tight_stats Replaced tight_bounds

Iceberg v4 stats-only fields give derived values a field ID in content_stats, and the file-level tight_stats flag says when statistics are exact.

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Lakehouse Dependency CVE Ledger, November 2026: Arrow 26.0.1, Parquet Java 1.18.2 and What to Patch First

Lakehouse Dependency CVE Ledger, November 2026: Arrow 26.0.1, Parquet Java 1.18.2 and What to Patch First

Arrow 26.0.1 fixes a critical bundled Brotli CVE in PyArrow wheels, and Parquet Java 1.18.2 bumps its shaded Jackson. What to patch first.

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Parquet's Revised Modular Footer Proposal: Row Groups Stop Being Physical Boundaries

Parquet's Revised Modular Footer Proposal: Row Groups Stop Being Physical Boundaries

Parquet's revised modular footer proposal makes row groups optional, defines statistics over row ranges and stores metadata modules as Parquet pages.

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Semantic Model Interchange Matrix, November 2026: Which Platforms Ingest LookML, MetricFlow, Semantic Views, Metric Views and Ossie

Semantic Model Interchange Matrix, November 2026: Which Platforms Ingest LookML, MetricFlow, Semantic Views, Metric Views and Ossie

Which platforms ingest LookML, MetricFlow, Snowflake and Databricks semantic models and Ossie, with the losses each converter documents.

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