Re: Boolean type storage format

On 11/01/2012 02:25 AM, Mike Christensen wrote:
> It would also matter what columns were next to it, correct?
It doesn't look like PostgreSQL packs booleans. It still matters what's
next to it because of the alignment requirements of other data types,
but you still have a minimum of one byte per boolean. See:

regress=> SELECT pg_column_size( ROW('t'::boolean) );
 pg_column_size
----------------
             25
(1 row)

regress=> SELECT pg_column_size( ROW('t'::boolean, 't'::boolean) );
 pg_column_size
----------------
             26
(1 row)

regress=> SELECT pg_column_size( ROW('t'::boolean, 't'::boolean,
'f'::boolean, 't'::boolean) );
 pg_column_size
----------------
             28
(1 row)

--
Craig Ringer