# Presto 316 Documentation

## 12.126. Release 0.118

## General Changes

- Fix planning error for `UNION` queries that require implicit coercions.
- Fix null pointer exception when using `checksum()`.
- Fix completion condition for `SqlTask` that can cause queries to be blocked.

## Authorization

We’ve added experimental support for authorization of SQL queries in Presto. This is currently only supported by the Hive connector. You can enable Hive checks by setting the `hive.security` property to `none`, `read-only`, or `sql-standard`.

Note

The authentication support is experimental and only lightly tested. We are actively working on this feature, so expect backwards incompatible changes. See the `ConnectorAccessControl` interface the SPI for details.