Fix handling of negative start indexes in array slice() function.
Fix inverted sign for time zones Etc/GMT-12, Etc/GMT-11, ..., Etc/GMT-1,
Etc/GMT+1, ... Etc/GMT+12.
Improve performance of server logging and HTTP request logging.
Reduce GC spikes by compacting join memory over time instead of all at once
when memory is low. This can increase reliability at the cost of additional
CPU. This can be enabled via the pages-index.eager-compaction-enabled
Improve performance of and reduce GC overhead for compaction of in-memory data structures,
primarily used in joins.
Mitigate excessive GC and degraded query performance by forcing expiration of
generated classes for functions and expressions one hour after generation.
Mitigate performance issue caused by JVM when generated code is used
for multiple hours or days.
Fix transaction support. Previously, after the first statement in the
transaction, the transaction would be abandoned and the session would
silently revert to auto-commit mode.
JDBC Driver Changes
Support using Statement.cancel() for all types of statements.
Resource Group Changes
Add environment support to the db resource groups manager.
Previously, configurations for different clusters had to be stored in separate databases.
With this change, different cluster configurations can be stored in the same table and
Presto will use the new environment column to differentiate them.