---
layout: news_item
date: "2015-09-02 12:00:00 +0000"
author: jhyde
version: 1.4.0-incubating
categories: [release]
tag: v1-4-0
sha: 0c0c203d
---
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In addition to a large number of bug fixes and minor enhancements,
this release includes improvements to
<a href="https://issues.apache.org/jira/browse/CALCITE-758">lattices</a> and
<a href="https://issues.apache.org/jira/browse/CALCITE-761">materialized views</a>,
and adds a
<a href="https://issues.apache.org/jira/browse/CALCITE-748">builder API</a>
so that you can easily create relational algebra expressions.

Read more about the [builder]({{ site.baseurl }}/news/2015/06/05/algebra-builder/),
[relational algebra]({{ site.baseurl }}/docs/algebra.html), and
[lattices]({{ site.baseurl }}/docs/lattice.html).
