# DuckDB v0.5.0 — Release & Upgrade Intelligence
- **Product:** DuckDB (https://duckdb.org)
- **Version:** v0.5.0
- **Released:** Sep 05, 2022
- **Impact Score:** 7/10
- **Breaking Changes:** Source flagged
- **Canonical Analysis:** https://changelogs.us/duckdb/updates/v0.5.0/

## Executive Summary (TL;DR)
DuckDB v0.5.0. Source highlight: This preview release of DuckDB is named "Pulchellus" after the Green pygmy goose (Nettapus pulchellus) which is native to Australia where VLDB 2022 is starting today. Despite being called a "goose" it is actually a duck.

## Breaking Changes & Deprecations
- - #4075: feat(breaking): improve python exceptions

## New Features
- #4189: Implement Out-of-Core Hash Join and Re-Work Query Verification
- #4022: Art Index Storage
- #4274: Join Order Optimizer improvements
- #4420: Logical Plan Serialization
- #4137, #4347, #4293, #4190, #4178, #4177, #3954 & #4159: Scalability and performance improvements for Window operator
- #4004: Add support for extensions to the parser, and add an example of this to the loadable extension demo

## Bug Fixes
- #4594: [Map] Fix map_extract from multiple rows
- #4585: Fix for r test instability, #4549
- #4560: Support all basic integer types in node API
- #4558: [CPP-API] Comment no longer causes crash
- #4552: [Fuzzer] Issue #4152 - Remove ToString roundtrip in query verification
- #4543: Fixing silent assertions