alasql/test/test035.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('..');
};

describe('Test 35 - LIMIT OFFSET', function() {
	it('1. Test 1', function(done){

		var db = new alasql.Database("db");
		db.exec('CREATE TABLE test1 (a int, b int)');
		db.exec('INSERT INTO test1 VALUES (1,1)');
		db.exec('INSERT INTO test1 VALUES (2,2)');
		db.exec('INSERT INTO test1 VALUES (3,3)');
		db.exec('INSERT INTO test1 VALUES (4,4)');
		db.exec('INSERT INTO test1 VALUES (5,5)');
		db.exec('INSERT INTO test1 VALUES (6,6)');

		var sql = 'SELECT COLUMN TOP 2 a FROM test1';
		var res = db.exec(sql);
		assert.deepEqual([ 1,2 ], res);

		var sql = 'SELECT COLUMN a FROM test1 LIMIT 3';
		var res = db.exec(sql);
		assert.deepEqual([ 1,2,3 ], res);

		var sql = 'SELECT COLUMN a FROM test1 LIMIT 3 OFFSET 2';
		var res = db.exec(sql);
		assert.deepEqual([ 2,3,4 ], res);

		done();
	});

	it('2. Test 1', function(done){

		alasql('CREATE DATABASE test35; use test35');
		alasql('CREATE TABLE test1 (a int)');
		
		for(var i=1; i<1000; i++) {
			alasql('INSERT INTO test1 VALUES (?)',[i]);
		}

		var sql = 'SELECT COLUMN TOP 2 a FROM test1';
		var res = alasql(sql);
		assert.deepEqual([ 1,2 ], res);

		var sql = 'SELECT COLUMN a FROM test1 LIMIT 5';
		var res = alasql(sql);
		assert.deepEqual([ 1,2,3,4,5 ], res);

		var sql = 'SELECT COLUMN a FROM test1 LIMIT 5 OFFSET 2';
		var res = alasql(sql);
		assert.deepEqual([ 2,3,4,5,6 ], res);

		alasql('drop database test35');
		done();
	});
});