alasql/test/test226.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 = '.';
};

describe('Test 226 CROSS APPLY and OUTER APPLY', function() {

    it("1. CROSS APPLY", function(done) {
    	var one = [{a:1},{a:2},{a:3}];
    	var two = [{a:1,b:10},{a:2,b:20},{a:3,b:30}];
    	var res = alasql('SELECT one.a,three.b FROM ? one \
    		CROSS APPLY \
    		(SELECT b FROM ? two WHERE one.a = two.a) three',[one,two]);
    	assert.deepEqual(res,[ { a: 1, b: 10 }, { a: 2, b: 20 }, { a: 3, b: 30 } ]);
		done();
    });

    it("2. CROSS APPLY", function(done) {
    	var one = [{a:1},{a:2},{a:3}];
    	var two = [{a:1,b:10},{a:2,b:20},{a:2,b:30},{a:4,b:40}];
    	var res = alasql('SELECT one.a,three.b FROM ? one \
    		CROSS APPLY \
    		(SELECT b FROM ? two WHERE one.a = two.a) three',[one,two]);
//    	console.log(res);
    	assert.deepEqual(res,[ { a: 1, b: 10 }, { a: 2, b: 20 }, { a: 2, b: 30 } ]);
		done();
    });

    it("3. CROSS APPLY", function(done) {
    	var one = [{a:1},{a:2},{a:3},{a:4}];
    	var two = [{a:1,b:10},{a:2,b:20},{a:2,b:30},{a:4,b:40}];
    	var res = alasql('SELECT one.a,three.b FROM ? one \
    		CROSS APPLY \
    		(SELECT b FROM ? two WHERE one.a = two.a) three',[one,two]);
//    	console.log(res);

    	assert.deepEqual(res,[ { a: 1, b: 10 },
		  	{ a: 2, b: 20 },
  			{ a: 2, b: 30 },
  			{ a: 4, b: 40 } ]);
		done();
    });

    it("4. OUTER APPLY", function(done) {
    	var one = [{a:1},{a:2},{a:3},{a:4}];
    	var two = [{a:1,b:10},{a:2,b:20},{a:2,b:30},{a:4,b:40}];
    	var res = alasql('SELECT one.a,three.b FROM ? one \
    		OUTER APPLY \
    		(SELECT b FROM ? two WHERE one.a = two.a) three',[one,two]);
//    	console.log(res);
    	assert.deepEqual(res,[ { a: 1, b: 10 },
  { a: 2, b: 20 },
  { a: 2, b: 30 },
  { a: 3, b:undefined },
  { a: 4, b: 40 } ]);
		done();
    });

    it("5. CROSS APPLY", function(done) {
    	var res = alasql('SELECT one._ AS a,two._ AS b FROM RANGE(1,5) AS one \
    		OUTER APPLY (SELECT COLUMN ARRAY(_) FROM RANGE(1,one._) half GROUP BY half._ % 2) two');
//    	console.log(res);
     	assert.deepEqual(res,[ { a: 1, b: [ 1 ] },
  { a: 2, b: [ 1 ] },
  { a: 2, b: [ 2 ] },
  { a: 3, b: [ 1, 3 ] },
  { a: 3, b: [ 2 ] },
  { a: 4, b: [ 1, 3 ] },
  { a: 4, b: [ 2, 4 ] },
  { a: 5, b: [ 1, 3, 5 ] },
  { a: 5, b: [ 2, 4 ] } ]);
		done();
    });


});