在内存中使用 Apache Derby 时发出警告
我有许多单元测试，它们在内存中使用 Apache Derby。 我的连接 URL 是：jdbc:derby:memory:srf.derby;create=true
我发现每次标记为 @Transactional 的方法完成时，我都会收到德比警告
12:53:28:5328 [org.hibernate.util.JDBCExceptionReporter] [main] WARN - SQL Warning: 10000, SQLState: 01J01
12:53:28:5328 [org.hibernate.util.JDBCExceptionReporter] [main] WARN - Database 'memory:srf.derby' not created, connection made to existing database instead.
是为什么呢？我做错了什么？
谢谢
I have a number of unit tests, which use Apache Derby in memory.
My connection url is: jdbc:derby:memory:srf.derby;create=true
I discovered that each time, when a method marked as @Transactional is finishing, I receive a Derby warning
12:53:28:5328 [org.hibernate.util.JDBCExceptionReporter] [main] WARN - SQL Warning: 10000, SQLState: 01J01
12:53:28:5328 [org.hibernate.util.JDBCExceptionReporter] [main] WARN - Database 'memory:srf.derby' not created, connection made to existing database instead.
Why is it? What I'm doing wrong?
Thank you
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你没有做错任何事。您每次都会传递“;create=true”，但数据库仅在程序第一次访问它时创建。由于它位于内存中，因此数据库会一直挂起，直到程序退出，此时它就会消失。
您可以通过仅在测试套件中的第一个测试上传递“;create=true”来避免警告，然后后续测试不需要传递该值。
或者，您可以不担心该警告。
You're not doing anything wrong. You're passing ';create=true' each time, but the database is only created the first time your program accesses it. Since it's in-memory, the database then hangs around until your program exits, at which point it disappears.
You could avoid the warning by passing ';create=true' only on the first test in your test suite, and then subsequent tests do not need to pass that value.
Or, you could just not worry about the warning.