Project PreQL

Usage

Compilation Instructions

We use make to compile all the files and creste the server executable. make is used primarily in Linux systems, so those of you who want to use Windows will probably have to look up alternatives (I hear there are ways to install make on Windows). To compile

cd into the SimpleRA directory

cd SimpleRA

cd into the soure directory (called src)

cd src

To compile

make clean
make

To run

Post compilation, an executable names server will be created in the src directory

./server

Database Commands

Task	Command	Syntax	Arguments
Assignment Statements
Cartesian Cross Product	CROSS	CROSS Relation1 Relation2	Relation 1: Name of Relation 1 Relation 2: Name of Relation 2
Distinct rows in a table	DISTINCT	DISTINCT Relation	Relation: Name of Relation
Join 2 Relations on a condition	JOIN	JOIN Relation1, Relation2 ON Col1 operator Col2	Relation 1: Name of Relation 1 Col1: Column of Relation 1 Relation 2: Name of Relation 2 Col2: Column of Relation 2 operator: One of ==, <, <=, =<, >, >=, =>
Project list from relation name	PROJECT	PROJECT ProjectionList FROM Relation	Projection List: List of projections Relation: Name of Relation
Select rows from relation	SELECT	SELECT Col1 operator Col2/[IntLiteral] FROM Relation	Col1: Column of Relation operator: One of ==, <, <=, =<, >, >=, => Col2: Another Column of Relation IntLiteral: Integer Literal Relation: Name of Relation
Sort relation by column name	SORT	SORT Relation BY Col IN Order	Relation: Name of Relation Col: Name of Column Order: ASC, DESC
Non-Assignment Statements
Clear Relation	CLEAR	CLEAR Relation	Relation: Name of Relation
Index Relation on an Attribute	INDEX	INDEX ON Col FROM Relation USING Strategy	Col: Column of Relation Relation: Name of Relation Strategy: HASH (for Hash), BTREE (for B+Tree), NOTHING (for nothing).
List relations	LIST	LIST TABLES	-
Load relation	LOAD	LOAD Relation	Relation: Name of Relation
Print relation	PRINT	PRINT Relation	Relation: Name of Relation
Quit	QUIT	QUIT	-
Rename Column Name	RENAME	RENAME Col1 TO Col2 FROM Relation	Relation: Name of Relation Col1: One Column Col2: Another Column
Export Relation into csv	EXPORT	EXPORT Relation	Relation: Name of Relation
Source file	SOURCE	SOURCE Filename	Filename: Name of files

Acknowledgement

Additional Design implemented by @Vikr-182, Bhavyajeet Singh.

Template code provided by Jayitha C, here.