Architecture overview, v0.1.0 docs, PLOMID

diagram

flowchart TB
    Client["PG client"] --> Codec["protocol/codec + message"]
    Codec --> Handler["server/handler: simple Q + extended P/B/D/E/S"]
    Handler --> Auth["session + scram/md5/cleartext"]
    Handler --> Exec["executor: parse → plan surface → execute"]
    Exec --> Registry["database registry (multi-DB)"]
    Exec --> Catalog["system_catalog + pg_catalog rows"]
    Exec --> Join["join engine: scans, joins, CTEs, aggregates, windows"]
    Join --> Txn["txn: lanes, group commit, hot rows"]
    Txn --> MVCC["mvcc: snapshots + versions"]
    Txn --> Idx["index: B-tree + ART"]
    Txn --> Store["storage + wal + columnar + filters"]
    Store --> Disk["devices/packs/blocks/pages + WAL + checkpoints"]

Diagram source · mermaidcopy included

mermaidsource

flowchart TB
    Client["PG client"] --> Codec["protocol/codec + message"]
    Codec --> Handler["server/handler: simple Q + extended P/B/D/E/S"]
    Handler --> Auth["session + scram/md5/cleartext"]
    Handler --> Exec["executor: parse → plan surface → execute"]
    Exec --> Registry["database registry (multi-DB)"]
    Exec --> Catalog["system_catalog + pg_catalog rows"]
    Exec --> Join["join engine: scans, joins, CTEs, aggregates, windows"]
    Join --> Txn["txn: lanes, group commit, hot rows"]
    Txn --> MVCC["mvcc: snapshots + versions"]
    Txn --> Idx["index: B-tree + ART"]
    Txn --> Store["storage + wal + columnar + filters"]
    Store --> Disk["devices/packs/blocks/pages + WAL + checkpoints"]

Crates: core types sql optimizer(stub) executor network server txn mvcc storage wal index columnar filters json lifecycle security(foundations) cli crc32c. Rule: own the engine (deny.toml forbids PG/RocksDB/ClickHouse/DuckDB foundations).

Deeper: Request lifecycle · Query pipeline · How it works

Architecture overview

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