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Release Notes

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  • 1.4.6 Changelog
  • 1.4.4 Changelog
  • 1.4.3 Changelog
  • 1.3.3 Changelog
  • 1.3.2 Changelog
  • 1.3.1 Changelog
  • 1.3.0 Changelog
  • 1.2.0 Changelog
  • 1.1.3 Changelog
  • 1.1.2 Changelog

Released February 12, 2024


  • Added support for Oracle 11g as a source database.

  • New status indicator on the project page that shows if a migration is running.

  • Improved permissions checks against MongoDB database when starting a new migration.

  • Improvements to Query Converter private preview.

Bug fixes:

  • Fixed an issue where completed migrations could not mark themselves as complete in web interface.

Released January 29, 2024


  • Improved synthetic foreign keys to be preserved after schema refresh.

  • Fix for fully-offline deployments in airgapped environments.

  • Fix for certain combinations of mappings, specifically two different mappings at the same level of embedding.

  • Various minor fixes and improvements to Sybase database support, CDC stage metrics, verification stage, database exports, and logging.

Released December 11, 2023

New features:

  • Sybase ASE database support is now available for one-time snapshot sync jobs and stored procedure conversion.

  • Confluent-hosted Kafka support for participants in the Kafka early access program. This release adds prebuilt support for connecting to a Kafka cluster managed by the Confluent hosting provider.


    Kafka is an open-source platform for distributed, high-availability workloads. To gain access to Relational Migrator with Kafka support, contact your MongoDB account team to sign up for the Kafka Early Access Program.

  • Integration supported with Hackolade.

    Hackolade is a visual data modeling tool. You can explore schemas in Hackolade by importing a Relational Migrator .relmig file. For details, see the Hackolade help article.


  • Improved SQL query conversion quality for the Query Converter (private preview). For details on how to join the Query Converter early access program, see Query Converter.

  • Improved application performance through expanded use of available memory in suitable server environments.

Released November 7, 2023


  • Performance improvements for sync jobs that create large arrays.

  • Fixed an issue where schema discovery failed on schema names that contain the dash character.

Released October 25, 2023


  • Improved performance when Relational Migrator analyzes large relational schemas.

  • Relational Migrator now integrates with the Windows certificate store for SSL connections.

New features:

  • New installer and binaries for Mac M1 architectures.

  • Mapping rules now show the original column and type used to generate an _id field.

  • Improved error messages in query converter (private preview).

Released October 10, 2023

New features:

  • Ability to select C#, Java, and JavaScript target languages for stored procedure conversions in the query converter (private preview).

  • Query conversions are now included when you export/import projects.

Bug fixes:

  • Fixed an issue where update events could return errors in CDC jobs.

  • Fixed an issue where Relational Migrator could hang while trying to detect if a new version was available.

  • Fixed an issue where all tables could be unexpectedly unchecked when selecting tables for a project.

  • Improvements to execution of sync jobs under the Kafka deployment model (private preview).

Released September 26, 2023

New features:

  • The Query Converter feature is now in private preview. To request private preview access, use the sign-up form within the Relational Migrator application:

    1. In the Code Generation tab, click the Query Converter pane.

    2. Click the Register interest button.

    3. Fill out the form details and click the Submit button.

Bug fixes:

  • SQL Server connections now require a database name, which resolves some issues caused by inferring the database name.

  • Improvements to the Mac and Windows installers.

Released September 4, 2023

New features:

  • Ability to change the data type for migrated fields.

  • Ability to control how null values are represented in the migrated data.

  • Ability to use calculated fields for a collection's _id value.

  • Diagnostic dump includes configuration files to help streamline support.

Bug fixes:

  • Improves to validation and error handling in mapping rules.

  • Improves ability to parse a wider range of Oracle DDL files.

  • Fixes an issue where tables were lost when refreshing a schema using SQL Server and Windows authentication.

  • Fixes an issue where CDC updates may target the wrong document when tables do not have a primary key.

  • Fixes an issue where database passwords can be incorrectly saved to the browser's password library.

Released July 26, 2023

New features:

  • Support for connecting to a SQL Server named instance.

  • Collection names now show for JSON schema files created from the Code Generation screen.

Bug fixes:

  • Fixes a post-sync job issue where data verification sometimes stops or displays as not started.

  • Fixes an issue where JSON columns containing top-level arrays cannot be migrated.

  • Fixes an issue where excluded fields can overwrite calculated fields with the same name.

  • Fixes an issue where calculated fields based on decimal column values return NaN.

  • Fixes an issue where some diagram view fields are cut off after you change the project level key handling option.

Released Jun 22, 2023

Relational Migrator 1.1.2 is now generally available. Relational Migrator assists in migrating your relational workloads to MongoDB.

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