Verifiable revisions – immudb version 1.3 released

Release notes 1.3

We’re pleased to announce immudb version 1.3. This version brings some new notable changes, 40% higher performance and a lot of other improvements and some bug fixes.

You can find the new release here for all major platforms:

Regarding SDKs, please make sure to check the compatibility list:

New Support plans

In response to its growing popularity and increasing adoption by enterprises, Codenotary, the primary contributor to the open source immudb, provides three levels of support.

  • Community: The free support plan that offers community members notifications of new releases and features.
  • Project: At $3,000 a year, project subscribers are promised 12-hour response times and 5 day resolutions. They are also offered 2 hours of setup and training credits, as well as 1 hour of development support.
  • Business: At $16,000 a year, business subscribers are promised 8-hour response times and 3 day resolutions. They are also offered 12 hours of setup and training credits, as well as 8 hours of development support. Managed services are also included in the business plan, including: training, development, configuration, monitoring, and daily Software Bill of Materials (SBOM) reference of the runtime.

Revision-based queries

In this version we’ve extended queries on the KV level by adding value revisions. This brings up an easy to use and elegant way to access historical values for keys such as getting the first version (revision 1) or a previous value (revision -1). You can quickly check how it works with newest immuclient by following our updated User quickstart guide or by writing an application using revision using our SDKs.

Initial support for ALTER TABLE

This version also brings the initial support for ALTER TABLE statements in the SQL layer. We’ve added support for ADD COLUMN and RENAME COLUMN operations.

Temporal SQL queries based on time

When dealing with historical values on the SQL layer, it is now possible to use time expressions next to transaction ids for specifying historical values. Queries such as SELECT * FROM sales SINCE '2022-01-06 11:38' UNTIL '2022-01-06 12:00' are now perfectly valid. You can find more info in the SQL reference.

Catalog queries

Information about the SQL catalog can now be read directly using SQL. For that purpose we’ve added few built-in functions into our SQL dialect such as DATABASES(). Read more about this feature in the SQL reference

Documentation updates

In this release we also worked on the immudb documentation available at Next to hundreds of smaller changes, the new menu structure will help finding useful resources. Most notably, the developer documentation is now split between the Key Value and SQL operations.

Other improvements

There are many more features added in this release. Most notably immudb now supports the USE [DATABASE] <dbname> and UNION SELECT SQL statements increasing the SQL compatibility. In addition to that, the Scan operation on the KV layer has now extended set of parameters allowing much greater filtering of scanned results.

Important notes

Starting with 1.3 release, immudb will now return an error if the amount of rows returned from the ScanTxScan and ZScan will be greater than the allowed maximum (1000) and the limit argument was not set. We’ve found out that the previous behavior lead to a very dangerous and hidden bugs if the caller made an assumption that those calls returned all available results if the limit was not given.

To retrieve results larger than 1000 elements, pagination with a proper limit value should be used. This is the same requirement as before however it currently requires explicit limit value.

In order to handle arbitrary result sizes, future releases of immudb will focus on streaming APIs where entries will be retrieved from the server in an incremental way.

You can find the full change log and the release download here:

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Use Case - Tamper-resistant Clinical Trials


Blockchain PoCs were unsuccessful due to complexity and lack of developers.

Still the goal of data immutability as well as client verification is a crucial. Furthermore, the system needs to be easy to use and operate (allowing backup, maintenance windows aso.).


immudb is running in different datacenters across the globe. All clinical trial information is stored in immudb either as transactions or the pdf documents as a whole.

Having that single source of truth with versioned, timestamped, and cryptographically verifiable records, enables a whole new way of transparency and trust.

Use Case - Finance


Store the source data, the decision and the rule base for financial support from governments timestamped, verifiable.

A very important functionality is the ability to compare the historic decision (based on the past rulebase) with the rulebase at a different date. Fully cryptographic verifiable Time Travel queries are required to be able to achieve that comparison.


While the source data, rulebase and the documented decision are stored in verifiable Blobs in immudb, the transaction is stored using the relational layer of immudb.

That allows the use of immudb’s time travel capabilities to retrieve verified historic data and recalculate with the most recent rulebase.

Use Case - eCommerce and NFT marketplace


No matter if it’s an eCommerce platform or NFT marketplace, the goals are similar:

  • High amount of transactions (potentially millions a second)
  • Ability to read and write multiple records within one transaction
  • prevent overwrite or updates on transactions
  • comply with regulations (PCI, GDPR, …)


immudb is typically scaled out using Hyperscaler (i. e. AWS, Google Cloud, Microsoft Azure) distributed across the Globe. Auditors are also distributed to track the verification proof over time. Additionally, the shop or marketplace applications store immudb cryptographic state information. That high level of integrity and tamper-evidence while maintaining a very high transaction speed is key for companies to chose immudb.

Use Case - IoT Sensor Data


IoT sensor data received by devices collecting environment data needs to be stored locally in a cryptographically verifiable manner until the data is transferred to a central datacenter. The data integrity needs to be verifiable at any given point in time and while in transit.


immudb runs embedded on the IoT device itself and is consistently audited by external probes. The data transfer to audit is minimal and works even with minimum bandwidth and unreliable connections.

Whenever the IoT devices are connected to a high bandwidth, the data transfer happens to a data center (large immudb deployment) and the source and destination date integrity is fully verified.

Use Case - DevOps Evidence


CI/CD and application build logs need to be stored auditable and tamper-evident.
A very high Performance is required as the system should not slow down any build process.
Scalability is key as billions of artifacts are expected within the next years.
Next to a possibility of integrity validation, data needs to be retrievable by pipeline job id or digital asset checksum.


As part of the CI/CD audit functionality, data is stored within immudb using the Key/Value functionality. Key is either the CI/CD job id (i. e. Jenkins or GitLab) or the checksum of the resulting build or container image.

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