define([
	'utils/QueryParser',
	'blocks/BasicBlock',
	'common/OperatorFactory',
	'common/ResultPrinter'], 
	function(QueryParser, BasicBlock, OperatorFactory, ResultPrinter) {
	var tables = {};

runQuery

function

runQuery()

Option name	Type	Description
executionPlan	Object	an execution plan generated by the QueryParser
callback	Object	callback fucntion called once a result is ready

function runQuery(executionPlan, callback){
		
		var factory = new OperatorFactory(tables);

		//start timer
		var queryStart = new Date();

		//output column names
		var columns = executionPlan.children.map(function(column){ return column.column; }),
			tree = factory.get(executionPlan);
		var result = new ResultPrinter(
			tree,
			columns
		);		

		result.getJSON(function(data){
			var queryEnd = new Date();
			console.log('Query execution: ' + ((queryEnd - queryStart) / 1000) + ' seconds');
			callback(data, executionPlan);
		});
	}

Zeldus

function

Zeldus()

Option name	Type	Description
options	Object	a configuration object

function Zeldus(options) {
    	var self = this,
    		onLoadedCallback = null;

		//setup tables
		if(options.dataSource){
			self.loadStart = new Date();
			for(var i = 0; i < options.dataSource.length; i++){
				options.dataSource[i].get(loadTable);
			}
		}

createProjection

method

self.createProjection()

Option name	Type	Description
name	Object	the name of the projection
projection	Object

self.createProjection = function(name, projection){ 

		};

execute

method

self.execute()

Option name	Type	Description
query	Object	an SQL query
callback	Object	a callback function

self.execute = function(query, callback) { 
			//parse query to generate plan
			var parser = new QueryParser();
			var executionPlan = parser.parse(query);
			console.log(JSON.stringify(executionPlan));
			//run plan
			runQuery(executionPlan, callback);
		};

		self.onDataLoaded = function(callback){
			onLoadedCallback = callback;
		}

		self.version = '0.1.2';

loadTable

function

loadTable()

Option name	Type	Description
tableName	Object	the name of the table
results	Object	the result of a data load

function loadTable(tableName, results){
			tables[tableName] = {};
			for(var i = 0; i < results.length; i++){
				for(var column in results[i]){
					if (results[i].hasOwnProperty(column)) {
						//create columns
						if(tables[tableName][column] === undefined){
							tables[tableName][column] = [];
						}
						//add blocks (uncompressed)
						tables[tableName][column].push(new BasicBlock(results[i][column], i));
					}
				}
			}
			var loadEnd = new Date();
			console.log('Data load: ' + ((loadEnd - self.loadStart) / 1000) + ' seconds');
			onLoadedCallback();
		}
	}

	return Zeldus;
});