Artifact for "What Breaks When the Schema Changes? Write Failures, Read Failures and Silent Errors in Delta Lake, Apache Iceberg and Parquet Pipelines"

Harness, raw results, analysis scripts and LaTeX source for a study that applies 15 scripted schema changes to Delta Lake 3.3.2, Apache Iceberg 1.9.2 and Parquet. Each change goes through DDL, schema-merging writes or appends, and every result is read back with Spark, DuckDB and PyArrow and compared with an independently built expectation. The Colab notebook reproduces everything on a CPU runtime. Versions: Spark 3.5.5, DuckDB 2.0.0, PyArrow 26.0.0.