func Init()
	// adds using namespace
	sys.add_use('System.Data')

	// initialize instance
	if(linked("Result") and linked("doQuery"))
		sys.add_var(this.name, 'Object')
	end

	// initialize properties
	if(isdef("SQLite"))
		warning(this.name + ' - manager does not defined')
	else
		this.sqlite = sys.get_undef_manager("SQLite")
	end
end

func make_query(data)
	return(this.sqlite + '.scalar_query(' + d("SQLquery") + ')')
end

func doQuery(data)
	if(linked("Result"))
		blk.println(this.codename, ' = ', make_query(data), ';')
		if(linked("onError"))
			blk.println('if (', this.codename, ' == null) {').inc()
				event("onError", this.sqlite + '.lasterror')
				blk.dec().println('} else {').inc()
				event("onResult", this.codename)
			blk.dec().println('}')
		else
			event("onResult", this.codename)
		end
	else
		event("onResult", make_query(data))
	end
end

func Result
	if(linked("doQuery"))
		return(this.codename)
	else
		return(make_query())
	end
end