PDF table extraction often looks easy until it fails in production. Real bank statements can be messy, with scanned pages, shifting layouts, merged cells, and wrapped rows that break standard Java...

Google 的 Swiss Table 是一种高效的哈希表实现，利用 SIMD 指令实现 16 路并行探测，性能比传统的 std::unordered_map 快 2 倍以上。它通过控制字节优化内存访问，减少缓存未命中率，提升查找效率，并采用开放寻址策略，解决了链式哈希的内存开销和性能瓶颈问题。

PostgreSQL 19 增加了 ALTER PUBLICATION 中对 EXCEPT TABLE 的支持，允许用户灵活地修改排除列表，从而更有效地管理表的发布和排除，提升了数据库的灵活性和可控性。

PostgreSQL 19将引入EXCEPT TABLE语法，允许用户在创建出版物时排除一个或多个表，从而避免将这些表的数据发送给订阅者。对于分区表，排除将在根级别应用，未来将支持通过ALTER PUBLICATION管理这些排除项。这一改进将增强逻辑复制的灵活性。

MySQL HeatWave is a fully-managed MySQL database service that combines transactions, analytics, machine learning, and GenAI services, without ETL duplication. Also included is HeatWave Lakehouse,...

文章介绍了《易经》六十四卦的Unicode范围（U+4DC0到U+4DFF），并提供了Python、PowerShell和JavaScript的代码示例，用于输出所有卦象。

2025年12月14日，亚历山大·科罗特科夫提交了ALTER TABLE ... MERGE PARTITIONS ...和ALTER TABLE ... SPLIT PARTITION ...两个DDL命令补丁。这些命令用于合并和拆分分区，但在高负载下不建议用于大型分区表，尽管为未来改进奠定了基础。

Managing large datasets can be a balancing act between performance and storage. Keeping your “hot” data lean is critical for speed and memory efficiency. But what about the “cold” data you still...

© Laurenz Albe 2025 Sometimes a string column should only contain one of a limited number of distinct values. Examples would be the current state of a service request or the US state in an...

From a successful gen-AI-backed shopping assistant to a new way to wow customers with great design, Turkish tableware, kitchenware, and homeware retailer Karaca partnered with McKinsey to create...

Take your first hands-on steps in MySQL! This post teaches you how to create schemas and tables using relatable library analogies, beginner-friendly SQL examples, and tips to avoid common...

本文介绍了如何在远程数据库执行 SQL 查询，并将结果流式传输到 DataFusion，支持数据插入、自动推断结果集 schema、下推过滤器和限制等功能，兼容多种数据库类型。

本文讨论了Apache Seata中出现的ShouldNeverHappenException异常“Get table meta failed”的原因及解决方案。问题是t_note_seq表缺少索引，导致Seata无法生成全局锁。解决方案是为该表添加主键索引，以确保Seata正常解析表元数据并执行分布式事务。

When implementing an optimization for derived clause lookup myself, Amit Langote and David Rowley argued about the initial size of hash table (which would hold the clauses). See some discussions...

It's incredibly useful to know which tables in your MySQL databases are seeing active changes versus those tables that are more static. To do this, we need to examine DML (Data Manipulation...

Open table formats like Apache Iceberg, Delta Lake, and Apache Hudi are transforming how developers manage large-scale data on object storage systems.