This repository contains:

• A semantic diff algorithm for XML documents (npm run main)
• A visualization tool for differences between normalized query plans, which makes use of the semantic diff algorithm (npm run start).

You can try out the query plan visualizer at https://toemmsche.github.io/semantic-diff/.

Query plans for TPC-H and TPC-DS queries for the RDBMS Umbra, HyPer, and DuckDB are preloaded.