IvorySQL · NotHimmel · May 9, 2026
diff --git a/.gitmodules b/.gitmodules
@@ -1,9 +1,9 @@
-[submodule "duckdb_mooncake"]
-	path = duckdb_mooncake
-	url = https://github.com/Mooncake-Labs/duckdb_mooncake.git
-[submodule "moonlink"]
-	path = moonlink
-	url = https://github.com/Mooncake-Labs/moonlink.git
-[submodule "pg_duckdb"]
-	path = pg_duckdb
-	url = https://github.com/duckdb/pg_duckdb.git
+[submodule "ivy_moonlink"]
+	path = ivy_moonlink
+	url = https://github.com/IvorySQL/ivy_moonlink.git
+[submodule "ivy_duckdb"]
+	path = ivy_duckdb
+	url = https://github.com/IvorySQL/ivy_duckdb.git
+[submodule "ivy_duckdb_mooncake"]
+	path = ivy_duckdb_mooncake
+	url = https://github.com/IvorySQL/ivy_duckdb_mooncake.git
diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
@@ -4,7 +4,7 @@
         {
             "name": "Dev Container",
             "includePath": [
-                "${workspaceFolder}/pg_duckdb/**",
+                "${workspaceFolder}/ivy_duckdb/**",
                 "/home/vscode/.pgrx/18.*/src/**"
             ]
         }

diff --git a/Cargo.toml b/Cargo.toml
@@ -21,8 +21,8 @@ pg18 = ["pgrx/pg18"]
 
 [dependencies]
 bincode = "2"
-moonlink_rpc.path = "moonlink/src/moonlink_rpc"
-moonlink_service = { path = "moonlink/src/moonlink_service", optional = true }
+moonlink_rpc.path = "ivy_moonlink/src/moonlink_rpc"
+moonlink_service = { path = "ivy_moonlink/src/moonlink_service", optional = true }
 native-tls = "0.2"
 pgrx = "0.16.1"
 postgres.git = "https://github.com/Mooncake-Labs/rust-postgres.git"

diff --git a/Dockerfile b/Dockerfile
@@ -19,7 +19,7 @@ RUN cargo install --locked cargo-pgrx@0.16.1 \
 WORKDIR pg_mooncake
 
 COPY Cargo.toml Makefile pg_mooncake.control .
-COPY moonlink moonlink
+COPY ivy_moonlink ivy_moonlink
 COPY src src
 
 RUN make package

diff --git a/Makefile b/Makefile
@@ -2,15 +2,15 @@ PG_VERSION ?= pg18
 export PG_CONFIG := $(shell cargo pgrx info pg-config $(PG_VERSION))
 MAKEFLAGS += --no-print-directory
 
-.PHONY: help clean duckdb_mooncake format install package pg_duckdb run test
+.PHONY: help clean ivy_duckdb_mooncake format install package ivy_duckdb run test
 
 help:
 	@echo "Usage: make <COMMAND> [OPTIONS]"
 	@echo ""
 	@echo "Commands:"
 	@echo "  run           Build and run pg_mooncake for development"
 	@echo "  install       Build and install pg_mooncake"
-	@echo "  pg_duckdb     Build and install pg_duckdb"
+	@echo "  ivy_duckdb    Build and install ivy_duckdb"
 	@echo "  package       Build an installation package for release"
 	@echo "  format        Format the codebase"
 	@echo "  test          Run all tests"
@@ -22,8 +22,8 @@ help:
 clean:
 	@cargo clean
 
-duckdb_mooncake:
-	@$(MAKE) -C duckdb_mooncake GEN=ninja OVERRIDE_GIT_DESCRIBE=v1.4.1
+ivy_duckdb_mooncake:
+	@$(MAKE) -C ivy_duckdb_mooncake GEN=ninja OVERRIDE_GIT_DESCRIBE=v1.4.1
 
 format:
 	@cargo fmt
@@ -35,10 +35,10 @@ install:
 package:
 	@cargo pgrx package
 
-pg_duckdb:
-	@$(MAKE) -C pg_duckdb install -j$(shell nproc)
+ivy_duckdb:
+	@$(MAKE) -C ivy_duckdb install -j$(shell nproc)
 
-run: pg_duckdb
+run: ivy_duckdb
 	@cargo pgrx run
 
 test:

diff --git a/README.md b/README.md
@@ -1,60 +1,44 @@
 <div align=center>
-<h1 align=center>pg_mooncake 🥮</h1>
-<h4 align=center>Real-time analytics on Postgres tables</h4>
+<h1 align=center>ivy_mooncake 🥮</h1>
+<h4 align=center>Real-time analytics on Postgres tables (IvorySQL distribution)</h4>
 
 [![][docs-shield]][docs-link]
 [![][license-shield]][license-link]
-[![][slack-shield]][slack-link]
-[![][x-shield]][x-link]
 </div>
 
 ## Overview
 
-**pg_mooncake** is a Postgres extension that creates a columnstore mirror of your Postgres tables in [Iceberg][iceberg-link], enabling fast analytics queries with sub-second freshness:
+**ivy_mooncake** is the IvorySQL distribution of [pg_mooncake][upstream-link], a Postgres extension that creates a columnstore mirror of your Postgres tables in [Iceberg][iceberg-link], enabling fast analytics queries with sub-second freshness:
 - **Real-time ingestion** powered by [moonlink][moonlink-link] for streaming and batched INSERT/UPDATE/DELETE.
 - **Fast analytics** accelerated by [DuckDB][pgduckdb-link], ranking top 10 on [ClickBench][clickbench-link].
 - **Postgres-native** allowing you to query a columnstore table just like a regular Postgres table.
 - **Iceberg-native** making your data readily accessible by other query engines.
 
-## Installation
-
-### Option 1: Docker
-
-For new users, we recommend using the Docker image to get started quickly:
-```bash
-docker run --name mooncake --rm -e POSTGRES_PASSWORD=password mooncakelabs/pg_mooncake
-```
+This fork tracks IvorySQL-maintained branches of `pg_duckdb`, `moonlink`, and `duckdb_mooncake` (`ivy_duckdb`, `ivy_moonlink`, `ivy_duckdb_mooncake`). The repository name is `ivy_mooncake`, but the extension it installs is unchanged — `pg_mooncake` — so SQL-side compatibility with upstream is preserved.
 
-This will start Postgres with pg_mooncake preinstalled. You can then connect to it using `psql` with the default user `postgres`:
-```bash
-docker exec -it mooncake psql -U postgres
-```
-
-### Option 2: From Source
+## Installation
 
-To build pg_mooncake, first install [Rust][rust-install], [pgrx][pgrx-install], and [the build tools for DuckDB][duckdb-install].
+To build ivy_mooncake, first install [Rust][rust-install], [pgrx][pgrx-install], and [the build tools for DuckDB][duckdb-install].
 
-Then, clone the repository:
+Then, clone the repository with submodules:
 ```bash
-git clone --recurse-submodules https://github.com/Mooncake-Labs/pg_mooncake.git
+git clone --recurse-submodules https://github.com/IvorySQL/ivy_mooncake.git
 ```
 
 To build and install for Postgres versions 14-18, run:
 ```bash
 cargo pgrx init --pg18=$(which pg_config)   # Replace with your Postgres version
-make pg_duckdb                              # Skip if pg_duckdb is already installed
+make ivy_duckdb                             # Skip if ivy_duckdb is already installed
 make install PG_VERSION=pg18
 ```
 
-Finally, add pg_mooncake to `shared_preload_libraries` in your `postgresql.conf` file and enable logical replication:
+Finally, add `pg_mooncake` to `shared_preload_libraries` in your `postgresql.conf` file and enable logical replication:
 ```ini
 duckdb.allow_community_extensions = true
 shared_preload_libraries = 'pg_duckdb,pg_mooncake'
 wal_level = logical
 ```
 
-For a complete walkthrough, refer to our [Dockerfile][dockerfile-link].
-
 ## Quick Start
 
 First, create the pg_mooncake extension:
@@ -91,26 +75,21 @@ Finally, query `trades_iceberg` to see that it reflects the up-to-date state of
 SELECT avg(price) FROM trades_iceberg WHERE symbol = 'AMZN';
 ```
 
-## Contributing
+Note: The repository is renamed to `ivy_mooncake` only at the GitHub-fork level. Inside the repo, the extension, the cdylib, and all SQL-level identifiers (`pg_mooncake` extension, `mooncake.*` schema, `USING mooncake` access method, `INSTALL mooncake FROM community`) are intentionally unchanged from upstream so SQL written against `pg_mooncake` continues to work.
+
+## Upstream
 
-pg_mooncake is an open-source project maintained by [Mooncake Labs][mooncake-link] and licensed under the [MIT License][license-link]. We'd love your help to make it even better! Join [our Slack][slack-link], participate in [discussions][discussions-link], open [issues][issues-link] to report bugs or suggest features, contribute code and documentation, or help us improve the project in any way. All contributions are welcome! 🥮
+ivy_mooncake is a fork of [Mooncake-Labs/pg_mooncake][upstream-link] under the [MIT License][license-link].
 
 [clickbench-link]: https://www.mooncake.dev/blog/clickbench-v0.1
-[discussions-link]: https://github.com/Mooncake-Labs/pg_mooncake/discussions
-[dockerfile-link]: https://github.com/Mooncake-Labs/pg_mooncake/blob/main/Dockerfile
 [docs-link]: https://docs.mooncake.dev/
 [docs-shield]: https://img.shields.io/badge/docs-mooncake?logo=readthedocs&logoColor=white
 [duckdb-install]: https://duckdb.org/docs/stable/dev/building/overview.html#prerequisites
 [iceberg-link]: https://iceberg.apache.org/
-[issues-link]: https://github.com/Mooncake-Labs/pg_mooncake/issues
-[license-link]: https://github.com/Mooncake-Labs/pg_mooncake/blob/main/LICENSE
+[license-link]: ./LICENSE
 [license-shield]: https://img.shields.io/badge/License-MIT-blue
-[mooncake-link]: https://mooncake.dev/
-[moonlink-link]: https://github.com/Mooncake-Labs/moonlink
-[pgduckdb-link]: https://github.com/duckdb/pg_duckdb
+[moonlink-link]: https://github.com/IvorySQL/ivy_moonlink
+[pgduckdb-link]: https://github.com/IvorySQL/ivy_duckdb
 [pgrx-install]: https://github.com/pgcentralfoundation/pgrx?tab=readme-ov-file#getting-started
 [rust-install]: https://www.rust-lang.org/tools/install
-[slack-link]: https://join.slack.com/t/mooncake-devs/shared_invite/zt-2sepjh5hv-rb9jUtfYZ9bvbxTCUrsEEA
-[slack-shield]: https://img.shields.io/badge/Mooncake%20Devs-purple?logo=slack
-[x-link]: https://x.com/mooncakelabs
-[x-shield]: https://img.shields.io/twitter/url?label=%40mooncakelabs&url=https%3A%2F%2Fx.com%2Fmooncakelabs
+[upstream-link]: https://github.com/Mooncake-Labs/pg_mooncake
diff --git a/ivy_duckdb b/ivy_duckdb
diff --git a/duckdb_mooncake → ivy_duckdb_mooncake b/duckdb_mooncake → ivy_duckdb_mooncake
diff --git a/ivy_moonlink b/ivy_moonlink
diff --git a/moonlink b/moonlink
diff --git a/pg_duckdb b/pg_duckdb
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "1.88.0"
+channel = "1.91.1"
 components = ["clippy", "rustfmt"]