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AQL - Acedb Query Language

AQL is the new query language for the Acedb database system.

It borrows syntax and ideas from OQL, the ODMG's proposed query language for object-oriented databases (which is supported by O2), Lorel, a language for querying semi-structured data in the Lore database system developed at Stanford, and Boulder, a value-attribute path-based access system developed by Lincoln Stein for the Whitehead Genome Center.

The implemenation of the language is considered finished and has been tested in Acedb Version 4.8 and above. The implementation provided with Acedb Version 4_7h is to be considered a beta-version and was not yet complete.
Queries can be submitted in tace after the 'aql ' keyword (Type ? in tace for more help).
A graphical interface similar to TableMaker or QueryBuilder is planned.

• Language overview
  • Operators and valid type combinations.
• Syntax and language grammar
• Error codes and explanations
• Future developments

• Tutorials
  • C.elegans database Example queries
  • Example Movie database and tutorial queries

• AQL internals - programmer documentation of algorithms and data-structures

Last Modified Thu Sep 2 23:00:11 2004	webmaster@acedb.org