there is no point in calling convertTo(Value.STRING) here, since we're just going to call getString() on the result

Avoid problems with runtime-compiled ALIAS methods when people have set the JAVA_TOOL_OPTIONS environment variable.

Replace Thread#sleep() with CountDownLatch
Original patch by Davide Cavestro, with some modifications by myself

Issue 485: Database get corrupted when column is renamed for which check constraint was defined inside create table statement.