Ledger Databases
Java mod listed for Minecraft 1.17–1.21. Downloads from the MC Java Mods app on Android.
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Ledger Databases
Adds support for MySQL, PostgreSQL and H2 databases in Ledger
Use
Common
For all database types, you will need to place Ledger Databases in your mods folder along with the latest version of ledger
H2
Add the following to the bottom of your Ledger config file:
[database_extensions]
database = "H2"
MySQL
Add the following to the bottom of your Ledger config file:
[database_extensions]
database = "MYSQL"
url = ""
username = ""
password = ""
properties = []
url: Must be URL of database with /<database_name> appended. An example URL would be localhost/ledger. You can optionally add port information such as localhost:3000/ledger
PostgreSQL
[database_extensions]
database = "MYSQL"
url = ""
username = ""
password = ""
properties = []
Connector properties
For some databases, such as MySQL, you can provide properties to the database connector. For each property, add a string entry to the properties array.
properties = ["useJDBCCompliantTimezoneShift=true", "useLegacyDatetimeCode=false", "serverTimezone=UTC"]
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.20.4, 1.21, 1.20.5
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as ledger-databases-1.2.2.jar — drop this file into the mods folder
- Download size: 6.6 MB
- Download link checked 14 Oct 2026 — working
These come from our own check of the pack file, not from the source page.