alasql/test/test236.js

AlaSQL.js - JavaScript SQL database library for relational and graph data manipulation with support of localStorage, IndexedDB, and Excel

if(typeof exports === 'object') {
	var assert = require("assert");
	var alasql = require('..');
} else {
	__dirname = '.';
};

// Test is based on
// https://msdn.microsoft.com/en-us/library/ms190349.aspx
//
describe('Test 236 MERGE', function() {

    it('1. Prepare database and tables', function(done){
        alasql('CREATE DATABASE test236; USE test236;');

        var sql = function(){/*
            CREATE TABLE [Target](EmployeeID int, EmployeeName varchar(10), 
                 CONSTRAINT Target_PK PRIMARY KEY(EmployeeID));
            CREATE TABLE [Source](EmployeeID int, EmployeeName varchar(10), 
                 CONSTRAINT Source_PK PRIMARY KEY(EmployeeID));

            INSERT [Target](EmployeeID, EmployeeName) VALUES(100, 'Mary');
            INSERT [Target](EmployeeID, EmployeeName) VALUES(101, 'Sara');
            INSERT [Target](EmployeeID, EmployeeName) VALUES(102, 'Stefano');

            INSERT [Source](EmployeeID, EmployeeName) Values(103, 'Bob');
            INSERT [Source](EmployeeID, EmployeeName) Values(104, 'Steve');

        */}.toString().slice(14,-3);

        alasql(sql);
        var res = alasql('SELECT * FROM [Target]');
        assert.deepEqual(res,[ { EmployeeID: 100, EmployeeName: 'Mary' },
            { EmployeeID: 101, EmployeeName: 'Sara' },
            { EmployeeID: 102, EmployeeName: 'Stefano' } ]);
//        console.log(res);

        var res = alasql('SELECT * FROM [Source]');
        assert.deepEqual(res, [ { EmployeeID: 103, EmployeeName: 'Bob' },
            { EmployeeID: 104, EmployeeName: 'Steve' } ]);
//        console.log(res);

        done();
    });

    it("2. Merge", function(done) {

    var sql = function(){/*

        MERGE [Target] AS T
        USING [Source] AS S
        ON (T.EmployeeID = S.EmployeeID) 
        WHEN NOT MATCHED BY TARGET AND S.EmployeeName LIKE 'S%' 
            THEN INSERT(EmployeeID, EmployeeName) VALUES(S.EmployeeID, S.EmployeeName)
        WHEN MATCHED 
            THEN UPDATE SET T.EmployeeName = S.EmployeeName
        WHEN NOT MATCHED BY SOURCE AND T.EmployeeName LIKE 'S%'
            THEN DELETE

    */}.toString().slice(14,-3);
        console.log(alasql.parse(sql).toString());

//        console.log(res);
        done();
    });

    it('99. DROP', function(done){
        alasql('DROP DATABASE test236');
        done();
    });

});