Relational Query Language Translator (RQLT)

RQLT is a command-line application that translates relational algebra expressions to relational calculus ones and vice-versa using Java and ANTLR.

Getting Started

These instructions will get you a copy of the project up and running on your local machine.

Prerequisites

• Java SE Development Kit 11 or later
• Apache Maven 3.6+
• Optional: Git (any reasonably recent version)

Building

1. Unpack the archive anywhere on your system.

2. cd to the folder relational-query-language-translator.

3. Build the project with Maven:

mvn package

This will create the file s1705270-0.0.1-SNAPSHOT.jar in the target/ subfolder.

Installing

You can move the file s1705270-0.0.1-SNAPSHOT.jar to any location on your system. The JAR contains all the necessary dependencies to be executed.

Running

You can run the executable JAR with

java -jar target/s1705270-0.0.1-SNAPSHOT.jar

EX) Relational Algebra to Relational Calculus

With no custom environment:

With a custom environment:

EX) Relational Calculus to Relational Algebra

With no custom environment:

With a custom environment:

EX) Showcasing with a real question from a past paper exam in Database Systems course at The University of Edinburgh

Relational Algebra to Relational Calculus:

Relational Calculus to Relational Algebra: