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Amazon RDS for MariaDB Adds MariaDB 12.3 Preview Support

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Amazon RDS for MariaDB now supports MariaDB 12.3 in the RDS Database Preview Environment for evaluation before general availability. This version introduces Oracle TO_DATE() compatibility, JSON and XML data types, and performance improvements for query optimization. The preview environment is for testing and instances are retained for a maximum of 60 days.

  • →Support for MariaDB 12.3 in RDS Database Preview Environment
  • →New MariaDB 12.3 Capabilities Available
  • →Improved Query Optimizer Performance
  • →Preview Environment Instance and Snapshot Limitations
Features (2) ›
  • Support for MariaDB 12.3 in RDS Database Preview Environment

    Amazon RDS for MariaDB now supports MariaDB 12.3 in a preview environment, allowing users to test the latest Long-Term Support release on Amazon RDS.

  • New MariaDB 12.3 Capabilities Available

    MariaDB 12.3 includes Oracle TO_DATE() function compatibility, a SQL Standard IS JSON predicate, a basic XML data type, and support for cursors on prepared statements.

Enhancements (1) ›
  • Improved Query Optimizer Performance

    The query optimizer in MariaDB 12.3 has been enhanced to handle reorderable LEFT JOIN statements and ordered scans over RANGE partitions more efficiently.

Notes (1) ›
  • Preview Environment Instance and Snapshot Limitations

    Database instances in the RDS Database Preview Environment are retained for a maximum of 60 days, and snapshots created within the preview environment can only be used to create or restore instances within that same environment.

Read the original announcement →

https://aws.amazon.com/about-aws/whats-new/2026/05/amazon-rds-maria-db-innovation-release-12-3-rds-database-preview-environment/

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