[Tinyos-help] TinyDB Reading and writing from Buffers

[Christian Brenninkmeijer]

Hi Everyone.
What does "SAMPLE PERIOD y" do in the following?

In the TinyDB docs they say they can write to buffers with the following 
example.

	CREATE BUFFER name SIZE X
	(field1 type, field2 type)

	SELECT field1, field2 FROM sensors
	SAMPLE PERIOD x
	INTO name

	SELECT field1, feild2
	SAMPLE PERIOD y
	FROM name

What does the line
"SAMPLE PERIOD y" actually do?
The query that filled the buffer has stopped so I would expect the 
retrieving query to just return the whole stored buffer. I do not 
understand what the SAMPLE PERIOD Y does.
-- 
Christian Brenninkmeijer
PhD Student - DIAS-MC project
Department of Computer Science
The University of Manchester