https://www.yongjiexue.io/en/tags/database/Recent content in Database on Yongjie XueHugoen-USWed, 26 Aug 2026 00:00:00 +0000https://www.yongjiexue.io/en/db/aws-get-duckdb/Wed, 26 Aug 2026 00:00:00 +0000https://www.yongjiexue.io/en/db/aws-get-duckdb/AWS bought the people who build the duck and left the duck itself to the foundation.https://www.yongjiexue.io/en/db/the-you-know-who/Mon, 03 Aug 2026 00:00:00 +0000https://www.yongjiexue.io/en/db/the-you-know-who/How did “far, far ahead,” “homegrown,” “innovation,” “domestic,” and “open source” become their own antonyms in China’s tech industry? This essay traces a systemic inflation of language and credibility—and the bill it has left for engineering, open source, and the industry’s ability to correct itself.https://www.yongjiexue.io/en/ai/rewrite-pg-in-rust/Sat, 11 Jul 2026 00:00:00 +0000https://www.yongjiexue.io/en/ai/rewrite-pg-in-rust/pgrust’s clean-room rewrite failed. Its mechanical port passed. The difference shows what AI can copy—and what it cannot.https://www.yongjiexue.io/en/ai/db-fs/Fri, 03 Jul 2026 00:00:00 +0000https://www.yongjiexue.io/en/ai/db-fs/File systems and databases have spent fifty years fighting and borrowing from each other. The agent era may seem to put file systems back on top, but the real winner may be databases that learn to speak the file system’s dialect: models provide understanding, databases provide guarantees, and discovery comes from a protocol layer where ls works on everything.https://www.yongjiexue.io/en/db/mysql-97-bye/Tue, 21 Apr 2026 00:00:00 +0000https://www.yongjiexue.io/en/db/mysql-97-bye/MySQL 9.7 is the first LTS release in the 9.x line. Its vector support is still all show, its years-late optimizer is disabled by default, and three years of Innovation Releases have produced remarkably little.https://www.yongjiexue.io/en/ai/agent-memory-framework/Sun, 19 Apr 2026 00:00:00 +0000https://www.yongjiexue.io/en/ai/agent-memory-framework/A cold shower for the red-hot agent memory market—not because agents do not need memory, but because memory is the endgame moat. That moat belongs to models, harnesses, and databases, not today’s “memory frameworks.”https://www.yongjiexue.io/en/ai/postgres-and-ai/Sat, 11 Apr 2026 00:00:00 +0000https://www.yongjiexue.io/en/ai/postgres-and-ai/Boring technology won the wildest era. A look at extensibility, agent choice, database cloning, and the future of the DBA.https://www.yongjiexue.io/en/db/ontology-bullshit/Sat, 21 Feb 2026 00:00:00 +0000https://www.yongjiexue.io/en/db/ontology-bullshit/Ontology is largely a data-modeling method. In enterprise practice, much of it overlaps with familiar database concepts, while the framing can make it feel newer and more differentiated than it really is.https://www.yongjiexue.io/en/ai/ai-survival/Sun, 01 Feb 2026 00:00:00 +0000https://www.yongjiexue.io/en/ai/ai-survival/Should we still hire fresh grads? Squeezed between AI and senior devs, what’s the play for new programmers? Master the right tools, take initiative, find the right mentor.https://www.yongjiexue.io/en/db/db-year-review-2025/Wed, 24 Dec 2025 00:00:00 +0000https://www.yongjiexue.io/en/db/db-year-review-2025/A conversation between Mike Stonebraker (MIT CSAIL, Turing Award Winner, Creator of PostgreSQL), Andy Pavlo (Carnegie Mellon University), and the DBOS team.https://www.yongjiexue.io/en/db/agent-native-db/Sun, 21 Dec 2025 00:00:00 +0000https://www.yongjiexue.io/en/db/agent-native-db/The bottleneck for AI agents is not the database kernel, but integration above it. Muscle memory (in-database computation), associative memory (vector-graph fusion), and the courage to experiment (Git for Data) will be critical—none of them requires a new engine.https://www.yongjiexue.io/en/db/mysql-baijiu/Sat, 20 Dec 2025 00:00:00 +0000https://www.yongjiexue.io/en/db/mysql-baijiu/MySQL is to the internet what baijiu is to China: harsh, hard to swallow, yet worshipped because culture demands obedience. Both are loyalty tests—will you endure discomfort to fit in?https://www.yongjiexue.io/en/db/minio-alternative/Mon, 08 Dec 2025 00:00:00 +0000https://www.yongjiexue.io/en/db/minio-alternative/MinIO just entered maintenance mode. What replaces it? Can RustFS step in? I tested the contenders so you don’t have to.https://www.yongjiexue.io/en/db/minio-is-dead/Thu, 04 Dec 2025 00:00:00 +0000https://www.yongjiexue.io/en/db/minio-is-dead/MinIO announces it is entering maintenance mode, the dragon-slayer has become the dragon – how MinIO transformed from an open-source S3 alternative to just another commercial software companyhttps://www.yongjiexue.io/en/pg/ai-db-king/Mon, 01 Dec 2025 00:00:00 +0000https://www.yongjiexue.io/en/pg/ai-db-king/Context window economics, the polyglot persistence problem, and the triumph of zero-glue architecture make PostgreSQL the database king of the AI era.https://www.yongjiexue.io/en/db/guru/Fri, 08 Aug 2025 00:00:00 +0000https://www.yongjiexue.io/en/db/guru/The database world is full of hype and marketing fog. This column cuts through it with blunt commentary, case studies, and technical deep dives.https://www.yongjiexue.io/en/db/car-autopilot-test/Sat, 26 Jul 2025 00:00:00 +0000https://www.yongjiexue.io/en/db/car-autopilot-test/Imagine a “closed-course” shootout for domestic databases and clouds, the way Dongchedi just humiliated 30+ autonomous cars. This industry needs its own stress test.https://www.yongjiexue.io/en/db/ai-dba-job/Mon, 30 Jun 2025 00:00:00 +0000https://www.yongjiexue.io/en/db/ai-dba-job/Who will be revolutionized first - OLTP or OLAP? Integration vs specialization, how to choose? Where will DBAs go in the AI era? Feng’s views from the HOW 2025 conference roundtable, organized and published.https://www.yongjiexue.io/en/db/db-for-ai/Tue, 03 Jun 2025 00:00:00 +0000https://www.yongjiexue.io/en/db/db-for-ai/The database for the AI era has been settled. Capital markets are making intensive moves on PostgreSQL targets, with PG having become the default database for the AI era.https://www.yongjiexue.io/en/db/bad-etcd/Wed, 07 May 2025 00:00:00 +0000https://www.yongjiexue.io/en/db/bad-etcd/Plenty. If you’re rolling your own Kubernetes, odds are you’ll crash because etcd ships with a 2 GB time bomb.https://www.yongjiexue.io/en/ai/ai-agent-era/Sun, 27 Apr 2025 00:00:00 +0000https://www.yongjiexue.io/en/ai/ai-agent-era/Future software = Agent + Database. No middle tiers, just agents issuing CRUD. Database skills age well, and PostgreSQL is poised to be the agent-era default.https://www.yongjiexue.io/en/db/mysql-vs-pgsql/Thu, 17 Apr 2025 00:00:00 +0000https://www.yongjiexue.io/en/db/mysql-vs-pgsql/A 2025 reality check on where PostgreSQL stands relative to MySQL across features, performance, quality, and 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/oracle-pg-xact/Thu, 27 Feb 2025 00:00:00 +0000https://www.yongjiexue.io/en/db/oracle-pg-xact/The PG community has started punching up: Cybertec’s Laurenz Albe breaks down how Oracle’s transaction system stacks against PostgreSQL.https://www.yongjiexue.io/en/db/db-is-the-arch/Wed, 22 Jan 2025 00:00:00 +0000https://www.yongjiexue.io/en/db/db-is-the-arch/Databases are the core of business architecture, but what happens if we go further and let databases become the business architecture itself?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.https://www.yongjiexue.io/en/db/poker-24/Tue, 03 Dec 2024 00:00:00 +0000https://www.yongjiexue.io/en/db/poker-24/A fun but devious challenge: solve the 24-point card game in SQL. Here is the PostgreSQL answer.https://www.yongjiexue.io/en/db/supabase/Mon, 25 Nov 2024 00:00:00 +0000https://www.yongjiexue.io/en/db/supabase/Supabase is great, own your own Supabase is even better. A tutorial for self-hosting production-grade supabase on local/cloud/ VM/BMs.https://www.yongjiexue.io/en/db/bio-core-cpu-core/Sat, 07 Sep 2024 00:00:00 +0000https://www.yongjiexue.io/en/db/bio-core-cpu-core/Programmers are expensive, scarce biological computing cores, the anchor point of software costs — please prioritize optimizing biological cores before optimizing CPU cores.https://www.yongjiexue.io/en/db/bad-mongo/Wed, 04 Sep 2024 00:00:00 +0000https://www.yongjiexue.io/en/db/bad-mongo/MongoDB has a terrible track record on integrity, lackluster products and technology, gets beaten by PG in correctness, performance, and functionality, with collapsing developer reputation, declining popularity, stock price halving, and expanding losses. Provocative marketing against PG can’t save it with “good marketing.”https://www.yongjiexue.io/en/db/mongo-powered-by-pg/Tue, 03 Sep 2024 00:00:00 +0000https://www.yongjiexue.io/en/db/mongo-powered-by-pg/MongoDB 3.2’s analytics subsystem turned out to be an embedded PostgreSQL database? A whistleblowing story from MongoDB’s partner about betrayal and disillusionment.https://www.yongjiexue.io/en/db/db-china/Thu, 25 Apr 2024 00:00:00 +0000https://www.yongjiexue.io/en/db/db-china/Friends often ask me, can Chinese domestic databases really compete? To be honest, it’s a question that offends people. So let’s try speaking with data - I hope the charts provided in this article can help readers understand the database ecosystem landscape and establish more accurate proportional awareness.https://www.yongjiexue.io/en/db/cheap-polar/Thu, 25 Apr 2024 00:00:00 +0000https://www.yongjiexue.io/en/db/cheap-polar/Today we discuss the fair pricing of commercial databases, open-source databases, cloud databases, and domestic Chinese databases.https://www.yongjiexue.io/en/db/redis-oss/Mon, 25 Mar 2024 00:00:00 +0000https://www.yongjiexue.io/en/db/redis-oss/Redis “going non-open source” is not a disgrace to Redis, but a disgrace to “open source/OSI” and even more so to public cloud. What truly matters has always been software freedom, while open source is just one means to achieve software freedom.https://www.yongjiexue.io/en/db/bad-mysql/Thu, 28 Dec 2023 00:00:00 +0000https://www.yongjiexue.io/en/db/bad-mysql/MySQL’s transaction ACID has flaws and doesn’t match documentation promises. This may lead to serious correctness issues - use with caution.https://www.yongjiexue.io/en/db/db-in-k8s/Wed, 06 Dec 2023 00:00:00 +0000https://www.yongjiexue.io/en/db/db-in-k8s/Whether databases should be housed in Kubernetes/Docker remains highly controversial. It has fundamental drawbacks with stateful services.https://www.yongjiexue.io/en/db/svdb-is-dead/Tue, 21 Nov 2023 00:00:00 +0000https://www.yongjiexue.io/en/db/svdb-is-dead/Vector storage and retrieval is a real need, but specialized vector databases are already dead. Small needs are solved by OpenAI directly, standard needs are captured by existing mature databases with vector extensions. The ecological niche left for specialized vector databases might support one company, but trying to build an industry around AI stories is impossible.https://www.yongjiexue.io/en/db/db-choke/Thu, 02 Nov 2023 00:00:00 +0000https://www.yongjiexue.io/en/db/db-choke/Many “domestic databases” are just shoddy, inferior products that can’t be helped. Xinchuang domestic OS/databases are essentially IT pre-made meals in schools. Users hold their noses while migrating, developers pretend to work hard, and everyone plays along with leaders who neither understand nor care about technology. The infrastructure software industry isn’t being strangled by anyone - the real chokehold comes from the so-called “insiders.”https://www.yongjiexue.io/en/db/rhel-compatibility/Mon, 09 Oct 2023 00:00:00 +0000https://www.yongjiexue.io/en/db/rhel-compatibility/RHEL-series OS distribution compatibility level: RHEL = Rocky ≈ Anolis > Alma > Oracle » Euler. Recommend using RockyLinux 8.8, or Anolis 8.8 for domestic requirements.https://www.yongjiexue.io/en/db/sovereign-dbos/Thu, 31 Aug 2023 00:00:00 +0000https://www.yongjiexue.io/en/db/sovereign-dbos/When we talk about self-reliance and control, what are we really talking about? Operational self-reliance vs. R&D self-reliance - what nations/users truly need is the former, not flashy “self-research”.https://www.yongjiexue.io/en/db/rethink/Mon, 29 May 2023 00:00:00 +0000https://www.yongjiexue.io/en/db/rethink/The cost-cutting imperative has triggered a reevaluation of all technologies, including databases. This series critiques hot DB technologies and poses fundamental questions about their trade-offs: Are cloud databases, distributed databases, microservices, and containerization real needs or false hype?https://www.yongjiexue.io/en/db/demand-pyramid/Wed, 10 May 2023 00:00:00 +0000https://www.yongjiexue.io/en/db/demand-pyramid/Similar to Maslow’s hierarchy of needs, user demands for databases also have a progressive hierarchy: physiological needs, safety needs, belonging needs, esteem needs, cognitive needs, aesthetic needs, self-actualization needs, and transcendence needs.https://www.yongjiexue.io/en/db/distributive-bullshit/Sun, 07 May 2023 00:00:00 +0000https://www.yongjiexue.io/en/db/distributive-bullshit/As hardware technology advances, the capacity and performance of standalone databases have reached unprecedented heights. which makes distributed (TP) databases appear utterly powerless, much like the “data middle platform,” donning the emperor’s new clothes in a state of self-deception.https://www.yongjiexue.io/en/db/pg-in-docker/Sun, 13 Jan 2019 00:00:00 +0000https://www.yongjiexue.io/en/db/pg-in-docker/Thou shalt not run a prod database inside a containerhttps://www.yongjiexue.io/en/db/reason-about-time/Tue, 11 Dec 2018 00:00:00 +0000https://www.yongjiexue.io/en/db/reason-about-time/A proper understanding of time is very helpful for correctly handling time-related issues in work and life. For example, time representation and processing in computers, as well as time handling in databases and programming languages.https://www.yongjiexue.io/en/db/character-encoding/Sun, 01 Jul 2018 00:00:00 +0000https://www.yongjiexue.io/en/db/character-encoding/Without understanding the basic principles of character encoding, even simple string operations like comparison, sorting, and random access can easily lead you into pitfalls. This article attempts to clarify these issues through a comprehensive explanation.https://www.yongjiexue.io/en/db/concurrent-control/Tue, 19 Jun 2018 00:00:00 +0000https://www.yongjiexue.io/en/db/concurrent-control/Concurrent programs are hard to write correctly and even harder to write well. Many programmers simply throw these problems at the database… But even the most sophisticated databases won’t help if you don’t understand concurrency anomalies and isolation levels.https://www.yongjiexue.io/en/db/blockchian/Sat, 09 Jun 2018 00:00:00 +0000https://www.yongjiexue.io/en/db/blockchian/The technical essence, functionality, and evolution of blockchain is distributed databases. Specifically, it’s a Byzantine Fault Tolerant (resistant to malicious node attacks) distributed (leaderless replication) database.https://www.yongjiexue.io/en/db/consistency/Tue, 08 May 2018 00:00:00 +0000https://www.yongjiexue.io/en/db/consistency/The term “consistency” is heavily overloaded, representing different concepts in different contexts. For example, the C in ACID and the C in CAP actually refer to different concepts.https://www.yongjiexue.io/en/db/why-learn-database/Fri, 20 Apr 2018 00:00:00 +0000https://www.yongjiexue.io/en/db/why-learn-database/Those who only know how to code are just programmers; learn databases well, and you can at least make a living; but for excellent engineers, merely using databases is far from enough.