#1 Should be able to cancel a statement

[Marc Prud'hommeaux]

It should be possible to cancel a running statement. Ideally,
we would trap CTRL-C and call Statement.cancel(), but that
isn't possible on all JVMs/OSes.

Another possibility is to execute all statements in another
thread, and then listen for a keystoke, and cancel the
statement if it is seen.

[John V Sichi]

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Note that a while back I submitted an implementation of this
for the Sun JVM. (For other JVM's the feature is silently
disabled.)