HyperSQL Server 2.4.1在运行时创建新数据库

Question

I have quick question. Is it possible to add new database when HSQL Server is running?

Quick view:

• when HSQL Server is starting (by runServer.bat file) server.properties with databases configuration is loading,
• during Server runtime I'd like to add new database (from eg Java application) without restart database server etc.
• I try to add many properties to the Server (eg remote_open) but I always get: "[Thread[HSQLDB Connection @52859374,5,HSQLDB Connections @754ba872]]: database alias= does not exist" because it try to connect to expected database instead of creating it...

Is it possible?

There is easy for many database systems but for HSQL I cannot find anything...

Answer 1

You need to start the server in a special remote_open mode which allows new databases to be opened. In addition, you need to specify the file path of the new database when you connect. When the server is started, check the messages for remote-open . Then connect with a URL like this jdbc:hsqldb:hsql://localhost/testx;file:mytextxfile In the URL testx is the network id of the database and file:mytextxfile is the file path of the database files.

Server messages when it starts:

[Server@4c5e176f]: Startup sequence initiated from main() method
[Server@4c5e176f]: Loaded properties from [C:\ft\hsqldb_w_1_8_0_n_work\server.properties]
[Server@4c5e176f]: [Thread[main,5,main]]: start() entered
[Server@4c5e176f]: [Thread[HSQLDB Server @4c5e176f,5,main]]: run() entered
[Server@4c5e176f]: Initiating startup sequence...
[Server@4c5e176f]: [Thread[HSQLDB Server @4c5e176f,5,main]]: server.maxdatabases=10
[Server@4c5e176f]: [Thread[HSQLDB Server @4c5e176f,5,main]]: server.remote_open=true
[Server@4c5e176f]: [Thread[HSQLDB Server @4c5e176f,5,main]]: server.tls=false
....

Server messages when connecting to new database:

[Server@4c5e176f]: [Thread[HSQLDB Connection @63db6942,5,HSQLDB Connections @4c5e176f]]: 2:Trying to connect user 'SA' to DB (testx;file:mytextxfile)
[Server@4c5e176f]: [Thread[HSQLDB Connection @63db6942,5,HSQLDB Connections @4c5e176f]]: 2:Connected user 'SA'