The SQL/MED ("Management of External Data") extension to the SQL standard is defined by ISO/IEC 9075-9:2008 (originally defined for SQL:2003). SQL/MED provides extensions to SQL that define foreign-data wrappers and datalink types to allow SQL to manage external data. External data is data that is accessible to, but not managed by, an SQL-based DBMS. This standard can be used in the development of federated database systems.

Implementations

• PostgreSQL has support for some SQL/MED since version 9.1. ^{[1] [2]}
• LucidDB has support for SQL/MED. ^[3]
• MariaDB has support for SQL/MED with the CONNECT storage engine. ^[4] The implementation uses different syntax than the official standard.
• Farrago has support for SQL/MED. ^[5]
• IBM Db2 has support for SQL/MED. ^[6]
• Teiid has support for SQL/MED. ^[7]
• Microsoft SQL Server has internal support for SQL/MED. DATALINK is provided by the FILESTREAM ^[8] (SQL Server 2008) and FileTable (SQL Server 2012) functionnalities and external data wrapper by the EXTERNAL TABLEs and PolyBase ^[9]

See also

• SQL
• SQL:2008
• SQL:2003

References

External links

• SQL/MED - A Status Report

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