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

	// initialize instance
	sys.add_var(this.name, 1)

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

func make_exec(data)
	return(this.sqlite + '.exec_query(' + d("SQLquery") + ')')
end

func doExec(data)
	if(len(this.sqlite))
		blk.println(this.codename, ' = ', make_exec(data), ';')
		if(linked("onError"))
			blk.println('if (', this.codename, ' == -1) {').inc()
				event("onError", this.sqlite + '.lasterror')
				blk.dec().println('} else {').inc()
				event("onResult", this.codename)
			blk.dec().println('}')
		else
			event("onResult", this.codename)
		end
	end
end