SQL/MED

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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.

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References

  1. PostgreSQL Wiki: SQL/MED
  2. Chapter 5.12, "Foreign Data" of the PostgreSQL Guide.
  3. LucidDB Architecture
  4. CONNECT storage engine
  5. Farrago SQL/MED Support
  6. IBM federated database technology
  7. Teiid Documentation