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).

Rename "getNoDimensions" to "getDimensionCount", because "getNoDimensions" is confusing for non-native English speaking people ("get no dimensions versus get yes dimensions" ?!)

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).

We need two methods - one for testing the Class<?> and one for testing an Object

remove testRandom(), Nicolas Fortin says this test case is now redundant, because the necessary logic is tested by the MVMap unit test

sessions are creating large transactions.

When running the Recover tool on very large (>6G) databases, some statistics were reported with negative numbers.