H2-Research
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H2数据库源代码学习研究(包括代码注释、文档、用于代码分析的测试用例)
建表语句报错了: ``` CREATE TABLE IF NOT EXISTS mytable ( f2 IDENTITY(1, 10) CONSTRAINT pk PRIMARY KEY HASH AUTO_INCREMENT, f5 int NOT NULL UNIQUE NOT NULL, f6 int NULL CHECK f6...
Bumps [postgresql](https://github.com/pgjdbc/pgjdbc) from 42.2.8 to 42.3.3. Changelog Sourced from postgresql's changelog. Changelog Notable changes since version 42.0.0, read the complete History of Changes. The format is based on Keep a...
![dependabot[bot] avatar](https://avatars.githubusercontent.com/in/29110?v=4 "dependabot[bot] avatar"){kind=avatar}
Bumps [postgresql](https://github.com/pgjdbc/pgjdbc) from 42.2.14 to 42.3.3. Changelog Sourced from postgresql's changelog. Changelog Notable changes since version 42.0.0, read the complete History of Changes. The format is based on Keep a...
1.在连接执行时，使用的嵌套循环，内部表 和外部表的选择是怎样的呢？一般是小表是外部表，代码中好像没有看到计算表的大小 2.两表连接时，每一次连接都要建立索引，关于COST的3种计算都是基于B树索引？没有HASH索引的执行吗？ 3. join中有用到HASH的地方吗？TableFilter中好像没读到 4.题外问题，用您给的代码调试，有很多错误，是因为jdk版本的问题吗？ 谢谢！
Bumps [postgresql](https://github.com/pgjdbc/pgjdbc) from 42.2.8 to 42.4.1. Changelog Sourced from postgresql's changelog. [42.4.1] (2022-08-01 16:24:20 -0400) Security fix: CVE-2022-31197 Fixes SQL generated in PgResultSet.refresh() to escape column identifiers so as to...
Bumps [postgresql](https://github.com/pgjdbc/pgjdbc) from 42.2.14 to 42.4.1. Changelog Sourced from postgresql's changelog. [42.4.1] (2022-08-01 16:24:20 -0400) Security fix: CVE-2022-31197 Fixes SQL generated in PgResultSet.refresh() to escape column identifiers so as to...
