---
layout: news_item
date: "2015-11-10 12:00:00 +0000"
author: jcamacho
version: 1.5.0
categories: [release]
tag: v1-5-0
sha: ba6e43c
---
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This is our first release as a top-level Apache project! Thanks to everyone who has contributed to it.

In addition to a large number of bug fixes and minor enhancements, this release includes major improvements to Avatica, planner rules, and RelBuilder.

Further, we built Piglet, a subset of the classic Hadoop language Pig. Pig is particularly interesting because it makes heavy use of nested multi-sets. You can follow this example to implement your own query language, and immediately taking advantage of Calcite's back-ends and optimizer rules.