techMusings

Shells, VMs, query languages.

Just seen this, which is pretty damn cool. It seems from the article and the previous one that it links to, that jhat is built with a Javascript engine -- presumably the one that's built into Mustang. This brings a few thoughts..

• How is the query language implemented? -- Is it resuable elsewhere? Is it an existing OQL implementation... are there in-mem impls?
  
• It would be cool to do this on a running VM, and provide update capability :o)
• If usable on a running VM, does this make more Prevayler viable since essentially, you can now run reports off the VM. Adding a JDBC/ODBC driver to this mix would be cool.
• Could this be added / accessed from Jez's grash, groovy shell? .. what about groovy sql support :o)

On the topic of shells and xQL languages, good auto complete makes these things much easier to use -- i seem to remember C# 3.0 / C omega has changed the order of the clauses to make it from..where..select or similar, in order to get this. While that looks mad to anyone who's spent too many hours inside databases, it does kinda make sense.