# Presto 316 Documentation

## 12.110. Release 0.134

## General Changes

- Add cumulative memory statistics tracking and expose the stat in the web interface.
- Remove nullability and partition key flags from SHOW COLUMNS.
- Remove non-standard `is_partition_key` column from `information_schema.columns`.
- Fix performance regression in creation of `DictionaryBlock`.
- Fix rare memory accounting leak in queries with `JOIN`.

## Hive Changes

- The comment for partition keys is now prefixed with “Partition Key”.

## SPI Changes

- Remove legacy partition API methods and classes.

Note

This is a backwards incompatible change with the previous connector SPI. If you have written a connector and have not yet updated to the `TableLayout` API, you will need to update your code before deploying this release.