query-plans

JetBrains DataGrip SQL Premium - Desktop package for Windows with a smooth setup flow and the full pro toolkit included.

DataFusion EXPLAIN and EXPLAIN ANALYZE query plan output rendered as Excalidraw diagrams

Interactive SQLite lab exposing parameter-sensitive query plans hidden behind one healthy fingerprint.

Deterministic offline PostgreSQL EXPLAIN JSON regression gate

Audit filtered pgvector HNSW recall, latency, and query-plan correctness against exact PostgreSQL search.

Measured benchmark of pgvector HNSW recall collapse under WHERE filters — selectivity cliff, iterative_scan cost, and the btree crossover the planner misses.