Duro Publisher's description
from Rene Hartmann
Duro is a relational open-source database library written in C.
Duro is a relational open-source database library written in C. It is based on the principles laid down in the book Databases, Types, and the Relational Model: The Third Manifesto by C. J. Date and Hugh Darwen.
The goal of the Duro project is to create a library which is as compliant with the proposed database language D as it is possible for a C library. This library is supposed to serve as a basis for a truly relational database management system (TRDBMS).
Here are some key features of "Duro":
??? Tuples and tables (relvars).
??? Relational algebra: RENAME, select (restrict), project, EXTEND, JOIN, SEMIJOIN, UNION, INTERSECT, MINUS, SEMIMINUS, SUMMARIZE PER, DIVIDEBY PER, WRAP, UNWRAP, GROUP, and UNGROUP.
??? Virtual tables (views).
??? Locking and nested transactions.
??? Duro tables are true sets -- uniqueness of tuples (rows) is always enforced. When creating real tables, at least one candidate key must be supplied. A candidate key may be empty.
??? User-defined types (including type constraints) and operators.
??? Declarative integrity.
??? Tcl interface, including support for relational expressions in Tutorial D syntax and operators implemented in Tcl ("stored procedures").
??? Simple GUI admin tool.
What's New in This Release:В· Upgraded to Berkeley DB 4.7.
В· Duro D/T now supports CASE and constraints.
В· Added exception handling to Duro D/T.
В· Dropped first argument of CONNECT.
В· The return type is now explicitly passed to funtions which implement read-only operators.
В· Single quotes are now used in data output in Tutorial D form.
В· If a type is not found, NAME_ERROR is raised instead of NOT_FOUND_ERROR.
В· Added limited type implementation functionality to Duro D/T.
В· Added operator GETENV.
System Requirements:No special requirements.
Program Release Status: Minor Update
Program Install Support: Install and Uninstall