# Presto 316 Documentation

## 12.54. Release 0.179

## General Changes

- Fix issue which could cause incorrect results when processing dictionary encoded data. If the expression can fail on bad input, the results from filtered-out rows containing bad input may be included in the query output (#8262).
- Fix planning failure when similar expressions appear in the `ORDER BY` clause of a query that contains `ORDER BY` and `LIMIT`.
- Fix planning failure when `GROUPING()` is used with the `legacy_order_by` session property set to `true`.
- Fix parsing failure when `NFD`, `NFC`, `NFKD` or `NFKC` are used as identifiers.
- Fix a memory leak on the coordinator that manifests itself with canceled queries.
- Fix excessive GC overhead caused by captured lambda expressions.
- Reduce the memory usage of map/array aggregation functions.
- Redact sensitive config property values in the server log.
- Update timezone database to version 2017b.
- Add `repeat()` function.
- Add `crc32()` function.
- Add file based global security, which can be configured with the `etc/access-control.properties` and `security.config-file` config properties. See Built-in System Access Control for more details.
- Add support for configuring query runtime and queueing time limits to resource groups.

## Hive Changes

- Fail queries that access encrypted S3 objects that do not have their unencrypted content lengths set in their metadata.

## JDBC Driver Changes

- Add support for setting query timeout through `Statement.setQueryTimeout()`.

## SPI Changes

- Add grantee and revokee to `GRANT` and `REVOKE` security checks.