hsqldb

Maven hangs while running test case Eclipselink & hsqldb

由 余生长醉 提交于 2020-08-18 17:47:37
问题 Using jps and jstack I can get to the offending waiting thread but don't know how to troubleshoot it or what is causing it. See below the Maven dependencies and the jstack result and the waiting thread with tid=0x000000000022c000 . Analysing further it seems an issue between Eclipselink and hsqldb for the chosen versions. I got this issue as result of upgrading those two libraries since it used to work perfectly for versions 2.0.1 and 1.8.0.10 of Eclipselink and hsqldb respectively.

Mybatis源码之美:2.13.解析databaseIdProvider元素，配置数据库类型唯一标志生成器

由 梦想的初衷 提交于 2020-08-17 17:00:21
解析databaseIdProvider元素，配置数据库类型唯一标志生成器 mybatis 中定义了一个名为 DatabaseIdProvider 的接口，该接口的作用是获取不同数据源在 mybatis 中的唯一标志。 DatabaseIdProvider 定义了两个方法， setProperties() 方法用于配置自定义属性， getDatabaseId() 方法用于获取指定数据源对应的 databaseId 。 /** * 在需要使用多数据库特性的时候，可以实现该接口来构建自己的DatabaseIdProvider * <p> * @author Eduardo Macarron */ public interface DatabaseIdProvider { // 配置自定义属性 void setProperties(Properties p); /** * 获取指定数据源的databaseId * * @param dataSource 数据源 */ String getDatabaseId(DataSource dataSource) throws SQLException; } 通常来说， setProperties() 方法会在 getDatabaseId() 方法前被调用。 借助于 DatabaseIdProvider 和映射语句中配置的 databaseId

Looking for the Best SQL-On-File Tool

由 一曲冷凌霜 提交于 2020-07-29 06:44:03
SQL is database-based. That means files need to be first loaded into the database before we can process them with the popular query language. The data loading is not always convenient. So tools that can directly execute SQL on files were designed to avoid troubles. These tools differ widely in working environment, usability, SQL execution capability and format requirement. I tried a number of them and found that esProc is the easiest and most efficient to use for data analysts. Let me explain my findings. Go to Looking for the Best SQL-On-File Tool for more infomation. After nearly 50 years of

Java common JDBC SQL Query strategy for Unit Test using HSQLDB and runtime using MySQL

由 孤人 提交于 2020-07-23 06:51:07
问题 I am developing Java Vert.x 3 application. I use HSQLDB for testing with in-memory DB and MySQL 8.0.20 for runtime. When the vertx verticle is deployed, it initializes the db and tables. Since this is a common code and there are differing SQL syntax between HSQLDB and MySQL and more ridiculously, the HSQLDB capitalizes all the property names and I have to double-quote the properties to use lower-case. I wonder how to achieve this. Here are my questions: (1) HSQLDB uses "IDENTITY" keyword for

Java common JDBC SQL Query strategy for Unit Test using HSQLDB and runtime using MySQL

由 ≡放荡痞女 提交于 2020-07-23 06:50:07
问题 I am developing Java Vert.x 3 application. I use HSQLDB for testing with in-memory DB and MySQL 8.0.20 for runtime. When the vertx verticle is deployed, it initializes the db and tables. Since this is a common code and there are differing SQL syntax between HSQLDB and MySQL and more ridiculously, the HSQLDB capitalizes all the property names and I have to double-quote the properties to use lower-case. I wonder how to achieve this. Here are my questions: (1) HSQLDB uses "IDENTITY" keyword for

Java common JDBC SQL Query strategy for Unit Test using HSQLDB and runtime using MySQL

由 自闭症网瘾萝莉.ら 提交于 2020-07-23 06:49:06
问题 I am developing Java Vert.x 3 application. I use HSQLDB for testing with in-memory DB and MySQL 8.0.20 for runtime. When the vertx verticle is deployed, it initializes the db and tables. Since this is a common code and there are differing SQL syntax between HSQLDB and MySQL and more ridiculously, the HSQLDB capitalizes all the property names and I have to double-quote the properties to use lower-case. I wonder how to achieve this. Here are my questions: (1) HSQLDB uses "IDENTITY" keyword for

How to query system versioning of hsqldb 2.5.1

由 送分小仙女□ 提交于 2020-07-10 03:11:18
问题 I open a new question, since I cannot find a solution. I would like to use the system versioning of Hsqldb 2.5.1 in order to be able to replicate in a background task, any change on a table (INSERT, DELETE or UPDATE) occurring over a time interval defined by two timestamp (timestart and timestop). Assuming this is possible, what would be the three queries to use to find the records changed during the time interval (timestart, timestop) by INSERT, UPDATE and DELETE respectively. Thank you for

How to connect to HSQLDB [closed]

由 家住魔仙堡 提交于 2020-07-03 05:41:47
问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . Im planning to learn jdbc topic. I have downloaded the HSQL DB from the site and extracted the zip file. I have few queries: How do we create a new database? Will we be able to see the contents of the db via any

Cascade Type.ALL not working

由 荒凉一梦 提交于 2020-06-12 04:31:49
问题 I have set CascadeType.ALL in my entity relation, but it works partially whenevr I persist an entity. Ex : ` Member entity : @OneToMany(mappedBy="member", cascade={CascadeType.ALL}) private List<ContactInfo> contactInfos; and ContactInfo entity : @ManyToOne @JoinColumn(name="MEMBERID") private Member member; ` Member details and also ContactInfo data are persisted. But Member.Id is not updated in ContactInfo table as I have nullable foreignkey constraint in ContactInfo table. How would I make

Cascade Type.ALL not working

由 ♀尐吖头ヾ 提交于 2020-06-12 04:31:03
问题 I have set CascadeType.ALL in my entity relation, but it works partially whenevr I persist an entity. Ex : ` Member entity : @OneToMany(mappedBy="member", cascade={CascadeType.ALL}) private List<ContactInfo> contactInfos; and ContactInfo entity : @ManyToOne @JoinColumn(name="MEMBERID") private Member member; ` Member details and also ContactInfo data are persisted. But Member.Id is not updated in ContactInfo table as I have nullable foreignkey constraint in ContactInfo table. How would I make
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