Tag:schema evolution

All the articles with the tag "schema evolution".

• 31 MIN READ•Sep 2, 2026

  Default Column Values and Field IDs: How Iceberg Schema Evolution Works at the Spec Level

  How field IDs and initial and write defaults let Iceberg change schemas on large tables without rewriting data, at the spec level.

  Apache IcebergSchema EvolutionField IDs
• 4 MIN READ•Feb 18, 2026

  Schema Evolution Without Breaking Consumers

  A source team renames a column from `user_id` to `customer_id`. Twelve hours later, five dashboards show blank values, two ML pipelines fail, and the data en...

  data engineeringbest practicesschema evolution