# dbt Core v0.21.1 — Release & Upgrade Intelligence
- **Product:** dbt Core (https://www.getdbt.com)
- **Version:** v0.21.1
- **Released:** Nov 29, 2021
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/dbt-core/updates/v0.21.1/

## Executive Summary (TL;DR)
dbt Core v0.21.1. Source highlight: Performance: Use child_map to find tests for nodes in resolve_graph (#4012, #4057)

## Bug Fixes
- Performance: Use child_map to find tests for nodes in resolve_graph (#4012, #4057)
- Switch `unique_field` from abstractproperty to optional property. Add docstring (#4025, #4028)
- Fix multiple partial parsing errors (#3996, #4020)
- Include only relational nodes in `database_schema_set` (#4063, #4077)
- Fixed bug with `error_if` test option (#4070)
- Added support for tests on databases that lack real boolean types. (#4084)