- fix an occasional error in the test-case

Query Statistics: new feature which stores the newest 100 SQL queries executed and their performance data.
Useful for tracking down badly performing queries.

The function "regexp_replace" threw the wrong kind of exception if the replacement string was invalid.

Hash indexes can only index one column. Rather throw an error message than silently converting it to a different type of index.

MVStore table engine: new setting "retention_time" to configure the time to retain old data. The default is 45 seconds.

Session-temporary LOB's could sometimes accumulate, increasing the size of the DB file until shutdown.
Now they are cleared out at every commit.

A checkpoint is now done every MAX_LOG_SIZE / 2 instead of every MAX_LOG_SIZE, so that the transaction log doesn't grow as large.

contains extra information to make it possible for smart editors to do autocomplete.
Patch from Nicolas Fortin.

javadoc updates: there is no need to explicitly document thrown exception unless it provides some extra commentary

rename the newly introduced UNDO_LOG_SIZE column to CONTAINS_UNCOMMITTED, because that is more reliable than the size of the undo log

For read-only databases, for the trace level "debug", the trace info is written to the temp directory.

In version 1.3.172, a performance regression was introduced when fixing the issue 389 (when there is a multi-column primary key, H2 does not seem to always pick the right index). This was related to boosting an index that matches the "order by" column list (the wrong index was used in some cases).