# Presto 316 Documentation

## 12.6. Release 311

## General Changes

- Fix incorrect results for aggregation query that contains a `HAVING` clause but no `GROUP BY` clause. (#733)
- Fix rare error when moving already completed query to a new memory pool. (#725)
- Fix leak in operator peak memory computations (#764)
- Improve consistency of reported query statistics. (#773)
- Add support for `OFFSET` syntax. (#732)
- Print cost metrics using appropriate units in the output of `EXPLAIN`. (#68)
- Add `combinations()` function. (#714)

## Hive Connector Changes

- Add support for static AWS credentials for the Glue metastore. (#748)

## Cassandra Connector Changes

- Support collections nested in other collections. (#657)
- Automatically discover the Cassandra protocol version when the previously required `cassandra.protocol-version` configuration property is not set. (#596)

## Black Hole Connector Changes

- Fix rendering of tables and columns in plans. (#728)
- Add table and column statistics. (#728)

## System Connector Changes

- Add `system.metadata.table_comments` table that contains table comments. (#531)