[WG: Sakai QA] Remove support for HSQLDB

[Neal Caidin]

Hi sakai-dev and sakai-qa,

We are probably removing support for HSQLDB 1.8 in Sakai 11.

Some tools currently aren't working with this old version (i.e. Forums)
though nightly is still running HSQLDB. New nightly's will be just Oracle
and MySQL (running on AWS). It's possible H2 or HSQLDB 2 could be used in
it's place but old .sql scripts (mostly in kernel) wouldn't be useful. We
will leave unit tests for now, ideally upgrade these later.

Feedback? Any concerns?

One impact is in pack-demo. Removing HSQLDB means that to get pack-demo
working will require some simple configuration to work with MySql (and also
a MySql instance available and running, which is certainly the more time
consuming task).   I used HSQLDB extensively testing  local instances of
Sakai for QA. However, I've made the switch to MySql and managed fine. In
fact there are some advantages to using MySql like persisting data and
ability to have separate schemas for different versions of Sakai. I don't
know of anybody else using HSQLDB for QA testing.

What do you think? What are the Use Cases for HSQLDB? Will anybody be hurt
by the removal of HSQLDB 1.8 support?

Thanks!
Neal Caidin
Sakai Community Coordinator
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