# Presto 316 Documentation

## 12.137. Release 0.107

## General Changes

- Added `query_max_memory` session property. Note: this session property cannot increase the limit above the limit set by the `query.max-memory` configuration option.
- Fixed task leak caused by queries that finish early, such as a `LIMIT` query or cancelled query, when the cluster is under high load.
- Added `task.info-refresh-max-wait` to configure task info freshness.
- Add support for `DELETE` to language and connector SPI.
- Reenable error classification code for syntax errors.
- Fix out of bounds exception in `lower()` and `upper()` when the string contains the code point `U+10FFFF`.