About on Mooncake

Roadmap

Mon, 01 Jan 0001 00:00:00 +0000

Note

The roadmap items below reflect the historical upstream pg_mooncake v0.2 design goals published at docs.mooncake.dev/pg/roadmap, together with the current maintenance scope of the pgsty/pg_mooncake fork (v0.3.0).

PGSTY Maintenance Focus (`v0.3.0+`)

The PGSTY fork of the Mooncake suite (pg_mooncake v0.3.0, duckdb_mooncake v0.0.2, moonlink v0.0.1) prioritizes long-term production stability, PostgreSQL version coverage, and security hardening:

PostgreSQL 14–18 Compatibility: Keeping pg_mooncake synchronized with current pgrx (0.19.3) across PostgreSQL 14, 15, 16, 17, and 18 on Linux (x86_64 and aarch64, RHEL/Rocky EL8–EL10, Debian 12/13, Ubuntu 22.04/24.04).
DuckDB 2.0.0 & pg_duckdb 1.2.0 Alignment: Maintaining ABI compatibility between pg_mooncake, pg_duckdb, and duckdb_mooncake as DuckDB evolves its TableCatalogEntry, TableFilterSet, and StorageExtension APIs.
Correctness & Fail-Fast Guards: Enforcing runtime pg_duckdb version checks, LSN-consistent snapshot reads on columnstore tables, automatic REPLICA IDENTITY FULL propagation across partitioned table hierarchies, and explicit 0A000 errors on deprecated helpers.
Dependency Security Hygiene: Regularly auditing and upgrading Rust dependencies across all three lockfiles (pg_mooncake, moonlink, duckdb_mooncake/moonlink_ffi) against the RustSec Advisory Database.

Historical Upstream Roadmap (`v0.2`)

The following four capabilities were outlined by Mooncake Labs for the v0.2 architecture:

License

Mon, 01 Jan 0001 00:00:00 +0000

The PGSTY Mooncake ecosystem preserves the exact upstream license terms of each repository created by Mooncake Labs, Inc.

Summary by Repository

Component	Repository	License	Notes
`pg_mooncake`	`pgsty/pg_mooncake`	`MIT`	Permissive open-source license (`Copyright (c) 2024 Mooncake Labs`).
`duckdb_mooncake`	`pgsty/duckdb_mooncake`	`MIT`	Permissive open-source license (`Copyright (c) 2025 Mooncake Labs`).
`moonlink` (Engine)	`pgsty/moonlink`	`BSL-1.1` + Exception	Business Source License 1.1 with the `PG_MOONCAKE LINKING & DISTRIBUTION EXCEPTION`, converting to `Apache-2.0` on `2029-05-05`.
`moonlink` (Client Crates)	`moonlink_rpc`, `moonlink_proto`, `moonlink_error`, `moonlink_table_metadata`	`MIT`	Explicitly licensed under MIT so `pg_mooncake` and `duckdb_mooncake` remain pure MIT works when linking against them.
Documentation Site	`pgsty/mooncake.pgsty.com`	`CC-BY-4.0` / `Apache-2.0`	Documentation prose under Creative Commons Attribution 4.0 International (`CC-BY-4.0`); site build scripts under `Apache-2.0`.

`pg_mooncake` & `duckdb_mooncake` — MIT License

Both pg_mooncake and duckdb_mooncake are distributed under the MIT License:

Attribution

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Upstream Creators

pg_mooncake, duckdb_mooncake, and moonlink were created by Mooncake Labs. All core architectural credit — including the hybrid rowstore + columnstore design, the Moonlink real-time Iceberg buffer engine, logical replication WAL ingestion, and the DuckDB execution bridge — belongs to the original Mooncake Labs authors and contributors.

Repository Lineage

PGSTY Repository	Upstream Source	Upstream Baseline Commit	PGSTY Release Tag
`pgsty/pg_mooncake`	`Mooncake-Labs/pg_mooncake`	`v0.2.0` (`be17cd0`) + post-0.2 upstream commits	`v0.3.0` (`1a9cbfd65be9a6486d020120acb49ef0c6800d68`)
`pgsty/duckdb_mooncake`	`Mooncake-Labs/duckdb_mooncake`	`ba79184`	`v0.0.2` (`49765a369ad88986916ce53c969ed2ce4ba66fac`)
`pgsty/moonlink`	`Mooncake-Labs/moonlink`	`f2e1715`	`v0.0.1` (`b298ef7444890e3c8af5544e350232518bcfd8e5`)
`pgsty/pg_duckdb`	`duckdb/pg_duckdb`	`v1.2.0`	`v1.2.0` (`8756099e267c47f0b86c24de4cf995327f1f4279`)

Documentation Provenance & Recovery

The original upstream documentation website (https://docs.mooncake.dev/) was taken offline after the upstream project transitioned direction, and no public documentation source repository remained available on GitHub.

Trademark Policy

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Independence Statement

mooncake.pgsty.com and the repositories under github.com/pgsty (pgsty/pg_mooncake, pgsty/duckdb_mooncake, pgsty/moonlink) are maintained independently by PGSTY (Pigsty) for the PostgreSQL open-source community.

This site and the packages distributed by Pigsty / PGEXT are not affiliated with, endorsed by, or sponsored by Mooncake Labs, Inc.

Third-Party Trademarks

Mooncake, pg_mooncake, duckdb_mooncake, and Moonlink are names originated by Mooncake Labs, Inc. They are used on this website solely for nominative, descriptive identification of the open-source PostgreSQL and DuckDB extensions and their compatibility lineage.
PostgreSQL and Postgres are registered trademarks of the PostgreSQL Community Association of Canada.
DuckDB is a trademark of the DuckDB Foundation / DuckDB Labs.
Apache Iceberg, Apache Parquet, Apache Arrow, and Apache are trademarks of the Apache Software Foundation.
Delta Lake is a trademark of LF Projects, LLC.
Pigsty and PGSTY are trademarks of Ruohang Feng (@Vonng).

SBOM & Security Audit

Mon, 01 Jan 0001 00:00:00 +0000

This page documents the exact submodule pin matrix (versions.json) and the dependency security audit performed for pg_mooncake v0.3.0, duckdb_mooncake v0.0.2, and moonlink v0.0.1.

Component & Submodule Pin Matrix (`versions.json`)

pgsty/pg_mooncake records its exact submodule and upstream dependency pins in versions.json:

Component	Path	Repository	Tag / Branch	Commit SHA	License
`pg_mooncake`	`/`	`pgsty/pg_mooncake`	`v0.3.0`	`1a9cbfd65be9a6486d020120acb49ef0c6800d68`	`MIT`
`duckdb_mooncake`	`duckdb_mooncake`	`pgsty/duckdb_mooncake`	`v0.0.2`	`49765a369ad88986916ce53c969ed2ce4ba66fac`	`MIT`
`duckdb` (nested)	`duckdb_mooncake/duckdb`	`duckdb/duckdb`	`v2.0.0`	`d54cbbe3df17e8e5ce68312f483b4155836112aa`	`MIT`
`moonlink`	`moonlink` (`duckdb_mooncake/moonlink`)	`pgsty/moonlink`	`v0.0.1`	`b298ef7444890e3c8af5544e350232518bcfd8e5`	`BSL-1.1` + Exception (`MIT` client crates)
`pg_duckdb`	`pg_duckdb`	`pgsty/pg_duckdb`	`v1.2.0`	`8756099e267c47f0b86c24de4cf995327f1f4279`	`MIT`
`rust-postgres`	`rust-postgres`	`sfackler/rust-postgres`	`master`	`14c8e599f5551a8caa96ff5023685a6f537a1455`	`Apache-2.0 OR MIT`

Core Rust Toolchain & Framework Pins

Dependency	Version	Role
`pgrx` / `cargo-pgrx`	`0.19.3`	PostgreSQL extension framework for Rust (PostgreSQL 14–18).
`iceberg`	`0.6.0`	Apache Iceberg table metadata and catalog client in `moonlink`.
`arrow` / `parquet`	`55.2.0`	Columnar memory format and Parquet writer in `moonlink`.
`datafusion`	`48.0.1`	Expression evaluation and pruning in `moonlink`.
`opendal`	`0.53.1`	Unified object storage abstraction (`fs`, `s3`, `gcs`, `azblob`).
`tonic` / `prost`	`0.14.5` / `0.14.3`	gRPC / IPC protocol serialization between `pg_mooncake` and `moonlink`.
`tokio`	`1.53.0`	Async runtime for background ingestion and object store I/O.

2026-11-05 Cargo Dependency Security Audit

All three Cargo workspaces were audited using cargo-audit 0.22.2 against the RustSec Advisory Database (commit 965bf9ad083b58e6340d65829d85217b18be9290, 927 advisories loaded).

About on Mooncake

Roadmap

PGSTY Maintenance Focus (v0.3.0+)

Historical Upstream Roadmap (v0.2)

License

Summary by Repository

pg_mooncake & duckdb_mooncake — MIT License

Attribution

Upstream Creators

Repository Lineage

Documentation Provenance & Recovery

Trademark Policy

Independence Statement

Third-Party Trademarks

SBOM & Security Audit

Component & Submodule Pin Matrix (versions.json)

Core Rust Toolchain & Framework Pins

2026-11-05 Cargo Dependency Security Audit

PGSTY Maintenance Focus (`v0.3.0+`)

Historical Upstream Roadmap (`v0.2`)

`pg_mooncake` & `duckdb_mooncake` — MIT License

Component & Submodule Pin Matrix (`versions.json`)