SQL Server features not available in MariaDB

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When planning a migration between different DBMSs, one of the most important aspects to consider is that the new database system will probably miss some features supported by the old one. This is not relevant for all users. The most widely used features are supported by most DBMSs. However, it is important to make a list of unsupported features and check which of them are currently used by applications. In most cases it is possible to implement such features on the application side, or simply stop using them.

This page has a list of SQL Server features that are not supported in MariaDB.

Introduced in SQL Server 2016 or older

  • User-Defined Types
  • Rules
  • Triggers on DDL and login; INSTEAD OF triggers, DISABLE TRIGGER
  • Synonyms
  • Queues
  • XML indexes, XML schema collection, XQuery

Introduced in SQL Server 2017

  • Adaptive joins
  • External libraries (MariaDB only supports procedural SQL and PL/SQL)

Introduced in SQL Server 2019

  • External languages (MariaDB only supports procedural SQL and PL/SQL)


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