alasql/src/61date.js

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

//
// Date functions
// 
// (c) 2014, Andrey Gershun
//

/** Standard JavaScript data types */

alasql.fn.Date = Object;
alasql.fn.Date = Date;
alasql.fn.Number = Number;
alasql.fn.String = String;
alasql.fn.Boolean = Boolean;

/** Extend Object with properties */
stdfn.EXTEND = alasql.utils.extend;


stdfn.CHAR = String.fromCharCode.bind(String);
stdfn.ASCII = function(a) {
    return a.charCodeAt(0);
};

/** 
 Return first non-null argument
 See https://msdn.microsoft.com/en-us/library/ms190349.aspx
*/
stdfn.COALESCE = function() {
	for(var i=0;i<arguments.length;i++) {
		if(typeof arguments[i] == 'undefined') continue;
		if(typeof arguments[i] == "number" && isNaN(arguments[i]) ) continue;
		return arguments[i];
	}
	return undefined;
}



stdfn.OBJECT_ID = function(objid){
	return !!alasql.tables[objid];
};

stdfn.DATE = function (d) {
	if(/\d{8}/.test(d)) return new Date(+d.substr(0,4),+d.substr(4,2)-1,+d.substr(6,2));
	return new Date(d);
};

stdfn.NOW = function(){
	var d = new Date();
	var s = d.getFullYear()+"."+("0"+(d.getMonth()+1)).substr(-2)+"."+("0"+d.getDate()).substr(-2);
	s += " "+("0"+d.getHours()).substr(-2)+":"+("0"+d.getMinutes()).substr(-2)+":"+("0"+d.getSeconds()).substr(-2);
	s += '.'+("00"+d.getMilliseconds()).substr(-3)
	return s;
};

stdfn.GETDATE = stdfn.NOW;
stdfn.CURRENT_TIMESTAMP = stdfn.NOW;


// stdfn.GETDATE = function(){
// 	var d = new Date();
// 	var s = d.getFullYear()+"."+("0"+(d.getMonth()+1)).substr(-2)+"."+("0"+d.getDate()).substr(-2);
// 	return s;	
// }


stdfn.SECOND = function(d){
	d = new Date(d);
	return d.getSeconds();
};


stdfn.MINUTE = function(d){
	d = new Date(d);
	return d.getMinutes();
};

stdfn.HOUR = function(d){
	d = new Date(d);
	return d.getHours();
};

stdfn.DAYOFWEEK = stdfn.WEEKDAY = function(d){
	d = new Date(d);
	return d.getDay();
};

stdfn.DAY = stdfn.DAYOFMONTH = function(d){
	d = new Date(d);
	return d.getDate();
};

stdfn.MONTH = function(d){
	d = new Date(d);
	return d.getMonth()+1;
};

stdfn.YEAR = function(d){
	d = new Date(d);
	return d.getFullYear();
};