EasyQLBy: Kangkook JeeSaahil PeerbhoySmridh ThaparKishan IyerOur Goals: Database Manipulation Language May connect to multiple databases Single environment from which to manage information from different databasesEasyQL Overview Allows common SQL operations Procedural programming and control flow Syntax “inspired” by Java and SQLEasyQL Syntax and Semantics Data types: int, float, varchar, table, and connection If-else and while are supported “[ ]” for attributes, “( )” for conditionsEasyQL Connectionconnection c1; c1 = conn("<host_add>", "<port>", "<dbname>", "<dbtype>", "<username>","<password>");EasyQL Table setup Table declaration: table type variables initialized to “garbage” value. Create table: Tab1.create(<conn_id>, “<attributes>”); Table assignment: tab1 = C1::coffee ; tab2 = tab1[“<attribute_names>”](“<conditions>”);Table operations: Update: tab1.update[“<assignments>”](“<conditions>”); Insert: Tab1.insert[“<attributes>”](“<values>”); Delete: Tab1.delete(“<conditions>”);Example code (if, while)int i,j;i=0;j=10;while (j>i){display ("i is");display (i);display ("j is");display (j);i=i+1;if (i==10) {display ("i is 10, exiting");}}Example code (create table)table T1;int ret;ret = T1.create (DefConn,"name varchar(255), age int");if (ret) {T1=DefConn::T1;display ("");display ("Tables in Default Connection");display (DefConn.list());display ("");display ("Description of T1");display (T1);} else {display ("create table failed");}Example code (table desc)connection c1;int i1;table t1;c1 = conn("69.22.220.234", "3306", "test", "mysql", "root", "plt123");t1 = c1::COFFEES;display ("");display ("### Table metadata printing ###");display ("");display (t1.dsc());display ("");display ("### Table selecting ###");display (t1["COF_NAME,SUP_ID"]("SALES=99"));Example code (insert, delete, update)connection c1;int i1;table t1,t2;c1 = conn("69.22.220.234", "3306", "test", "mysql", "root", "plt123");i1=0;t1.create (c1,"name varchar(255), age int");t2=c1::t1;display ("");display ("#### Before insert ####");display ("");display (t2);…Example code (insert, delete, update) - Cont.display ("");display ("#### inserting ####");display ("");while (i1<5) {i1=i1+1;display (i1);t2.insert["name,age"]("'Kishan',22");}i1=0;while (i1<5) {i1=i1+1;display (i1);t2.insert["name,age"]("'Saahil',23");}display ("");display ("#### After insert ####");display ("");display (t2);t2.update ["name='kangkook'"]("age=22");display ("");display ("#### After update ####");display ("");display (t2);t2.delete ("name='kangkook'");display ("");display ("#### After deletion ####");display ("");display (t2);t2.store (c1);Example code (store)connection c1,c2;int i1;table t1;c1 = conn("69.22.220.234", "3306", "test", "mysql", "root", "plt123");c2 = conn("localhost", "3306", "test", "mysql", "root", "plt123");display ("");display ("table t1 from connection c1");display ("");t1=c1::t2;display (t1);display ("");display ("table t1 from connection c2");display ("");display (c2::t1);t1.store (c2);display (c2::t1);Division of Labour Kangkook: Front-end, back-end, testing Kishan: Front-end, documentation Smridh: Back-end, documentation, testing Saahil : Front-end, documentation,
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