alasql/test/test275.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('..');
  var _ = require('lodash');
} else {
	__dirname = '.';
};


describe('Test 275 INNER JOIN on empty tables', function() {

  it('1. Prepare databases', function(done) {
    alasql('CREATE DATABASE test275; USE test275');
    alasql('CREATE TABLE one0 (a INT, b NVARCHAR(10))');
    alasql('CREATE TABLE one1 (a INT, b NVARCHAR(10))');
    alasql('INSERT INTO one1 VALUES (1,"One"), (2,"Two"), (3,"Three"), (4,"Four")');

    alasql('CREATE TABLE two0 (b NVARCHAR(10), c INT)');
    alasql('CREATE TABLE two1 (b NVARCHAR(10), c INT)');
    alasql('INSERT INTO two1 VALUES ("One",10), ("Two",20), ("Three",30), ("Five",50)');
    alasql.options.modifier = 'RECORDSET';
    done();
  });

  it('2. INNER JOIN', function(done) {
    var res = alasql('SELECT one0.*, two0.* FROM one0 INNER JOIN two0 ON one0.b = two0.b');
    assert.deepEqual(res.data,[]);

    var res = alasql('SELECT one1.*, two0.* FROM one1 INNER JOIN two0 ON one1.b = two0.b');
    assert.deepEqual(res.data,[]);

    var res = alasql('SELECT one0.*, two1.* FROM one0 INNER JOIN two1 ON one0.b = two1.b');
    assert.deepEqual(res.data,[]);

    var res = alasql('SELECT one1.*, two1.* FROM one1 INNER JOIN two1 ON one1.b = two1.b');
    assert.deepEqual(res.data,
      [ { a: 1, b: 'One', c: 10 },
        { a: 2, b: 'Two', c: 20 },
        { a: 3, b: 'Three', c: 30 } ]
    );

    done();    
  });

  it('2. OUTER JOIN', function(done) {
    var res = alasql('SELECT one0.*, two0.* FROM one0 OUTER JOIN two0 ON one0.b = two0.b');
//    console.log(res.data);

    var res = alasql('SELECT one1.*, two0.* FROM one1 OUTER JOIN two0 ON one1.b = two0.b');
//    console.log(res.data);

    var res = alasql('SELECT one0.*, two1.* FROM one0 OUTER JOIN two1 ON one0.b = two1.b');
//    console.log(res.data);

    var res = alasql('SELECT one1.*, two1.* FROM one1 OUTER JOIN two1 ON one1.b = two1.b');
//    console.log(res.data);

    done();    
  });

  it('3. LEFT JOIN', function(done) {
    var res = alasql('SELECT one0.*, two0.* FROM one0 LEFT JOIN two0 ON one0.b = two0.b');
//    console.log(res.data);

    var res = alasql('SELECT one1.*, two0.* FROM one1 LEFT JOIN two0 ON one1.b = two0.b');
//    console.log(res.data);

    var res = alasql('SELECT one0.*, two1.* FROM one0 LEFT JOIN two1 ON one0.b = two1.b');
//    console.log(res.data);

    var res = alasql('SELECT one1.*, two1.* FROM one1 LEFT JOIN two1 ON one1.b = two1.b');
//    console.log(res.data);

    done();    
  });

  it('99. Drop databases', function(done) {
    alasql.options.modifier = undefined;
    alasql('DROP DATABASE test275');
    done();
  });

});