https://www.yongjiexue.io/en/tags/olap/Recent content in OLAP on Yongjie XueHugoen-USFri, 28 Aug 2026 00:00:00 +0000https://www.yongjiexue.io/en/db/catalog-bullshit/Fri, 28 Aug 2026 00:00:00 +0000https://www.yongjiexue.io/en/db/catalog-bullshit/Snowflake blames the lakehouse’s governance gaps on multiple engines and turns the Catalog into a new billing layer. But the core of an Iceberg Catalog is just a metadata-pointer CAS; the real governance gap comes from separating the control plane from the data path.https://www.yongjiexue.io/en/db/ontology-again/Sun, 15 Mar 2026 00:00:00 +0000https://www.yongjiexue.io/en/db/ontology-again/Palantir’s Ontology is, technically, data modeling. The more interesting question is how a philosophy term got repurposed to market system integration and data modeling, and why that story is so likely to turn into another round of concept inflation in China’s tech ecosystem.https://www.yongjiexue.io/en/db/pg-kiss-duckdb/Wed, 12 Mar 2025 00:00:00 +0000https://www.yongjiexue.io/en/db/pg-kiss-duckdb/If you ask me, we’re on the brink of a cosmic collision in database-land, and Postgres + DuckDB is the meteor we should all be watching.https://www.yongjiexue.io/en/db/7-week-7-db/Tue, 03 Dec 2024 00:00:00 +0000https://www.yongjiexue.io/en/db/7-week-7-db/Is PostgreSQL the king of boring databases? Here are seven databases worth studying in 2025: PostgreSQL, SQLite, DuckDB, ClickHouse, FoundationDB, TigerBeetle, and CockroachDB—each deserving a week of deep exploration.