# Presto 316 Documentation

## 12.73. Release 0.160

## General Changes

- Fix planning failure when query has multiple unions with identical underlying columns.
- Fix planning failure when multiple `IN` predicates contain an identical subquery.
- Fix resource waste where coordinator floods rebooted workers if worker comes back before coordinator times out the query.
- Add Lambda Expressions.

## Hive Changes

- Fix planning failure when inserting into columns of struct types with uppercase field names.
- Fix resource leak when using Kerberos authentication with impersonation.
- Fix creating external tables so that they are properly recognized by the Hive metastore. The Hive table property `EXTERNAL` is now set to `TRUE` in addition to the setting the table type. Any previously created tables need to be modified to have this property.
- Add `bucket_execution_enabled` session property.