# DuckDB v1.5.2 — Release & Upgrade Intelligence
- **Product:** DuckDB (https://duckdb.org)
- **Version:** v1.5.2
- **Released:** Apr 13, 2026
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/duckdb/updates/v1.5.2/

## Executive Summary (TL;DR)
DuckDB v1.5.2. Source highlight: This is a bug fix release for various issues discovered after we released v1.5.1

## New Features
- [lance] Add for v1.4-andium
- add lance for v1.4
- Add descriptions for vortex and lance
- Add setting for limiting the number of threads launched concurrently in the test runner (`max_test_threads`)
- CLI: Add .help shortcuts
- Add missing test for delta byte array

## Bug Fixes
- Backport various race condition fixes to v1.4
- Fix unbounded row group growth for indexed tables on repeated load+insert cycles
- Fix memory leak when reusing PreparedStatement (#21089)
- Fix #21512: correctly render empty results in .mode json
- Fix parsing test path to skip
- Unify adding suffixes to path in `Path:: AddSuffixToPath` - fix temp directory split bug