---
title: "Materialize v0.75"
date: 2023-11-01
released: true
patch: 3
---

## v0.75.0

#### SQL

* Support [`ALTER [ CLUSTER | SCHEMA ] SWAP`](/sql/alter-swap/), which allows
  atomically renaming clusters and schemas. This is useful in the context of
  [Blue/Green deployments](/manage/blue-green/).

* Change the semantics and schema of the [`mz_internal.mz_frontiers`](https://materialize.com/docs/sql/system-catalog/mz_internal/#mz_frontiers)
  system catalog table, and add the [`mz_internal.mz_cluster_replica_frontiers`](https://materialize.com/docs/sql/system-catalog/mz_internal/#mz_cluster_replica_frontiers)
  system catalog table. These objects are mostly useful to support existing and
  upcoming features in Materialize.

#### Bug fixes and other improvements

* Remove the requirement of `USAGE` privileges on types for `SELECT` and
  `EXPLAIN` statements.