Sometimes it is needed to store compressed data in the DB. Unfortunately not all the DBs have built-in compression and FUSE compressed FSes are not available for every OS. So it may make sense to store compressed binary blobs in the DB.

Unfortunately when one sees them in DBeaver he sees them compressed, but often they are needed uncompressed. So it'd be nice to have a feature to decompress the

Environment

Liquibase Version: 4.0.0

Liquibase Integration & Version: spring boot 2.3.2

Liquibase Extension(s) & Version:

Database Vendor & Version: MySql 8.0.15

Operating System Type & Version: Ubuntu 18.04.3

Description

Fail when t

本篇文章内容引导，如何在 asp.net core 项目中使用特性(注解) 的方式管理事务。

UnitOfWorkManager 只可以管理 Repository 仓储对象的事务，直接 fsql.Insert<T>() 是不行的！！

支持六种传播方式(propagation)，意味着跨方法的事务非常方便，并且支持同步异步：

• Requierd：如果当前没有事务，就新建一个事务，如果已存在一个事务中，加入到这个事务中，默认的选择。
• Supports：支持当前事务，如果没有当前事务，就以非事务方法执行。
• Mandatory：使用当前事务，如果没有当前事务，就抛出异常。
• NotSupported：以非事务方式执行操作，如果当前存在事务，就把当前事务挂起。
• Never：以非事务方式执行操作，如果当前事务存在则抛出异常。
• Nested：以嵌套事

It's hacky because of a leaky abstraction: marking a property by an attribute to specify it as a column - is an implementation detail and it's quite low-level. If we need to say 'this property is a column' in a generic way - there must be a higher-level entity/API of doing so (without using attributes).
Think it the other way - IMetadataReader returns an attribute which is really not there (not o