What Is Impact Analysis for a Schema Change? Finding What Breaks Before You Rename a Column

Impact analysis is the step before a schema change where you find every model, check, dashboard, and consumer that depends on the column or table you are about to alter. This explainer covers why it needs column-level lineage rather than table-level, how to run it from the command line with Bruin, and what dbt, Airflow, and catalog tools give you instead.