schema_evolution

Schema Evolution

Demonstrates all schema evolution operations with data preservation.

What it demonstrates

• add_column() — adding a new nullable column
• rename_column() — renaming an existing column
• update_column() — widening a column type (INTEGER to BIGINT)
• drop_column() — removing a column
• Multiple schema changes in a single commit
• Data preservation through all evolution steps

Prerequisites

• pyducklake installed

Run

uv run python examples/schema_evolution/schema_evolution.py