On Tue, Sep 21, 2010 at 11:42 PM, Pei He <hepeim...@gmail.com> wrote: > Hi, > In ctid, there are the block num, and the tuple offset inside the block. > > How can I know the maximum number of tuples in a block? > The block size would be BLCKSZ.
See MaxHeapTuplesPerPage and MaxIndexTuplesPerPage. > I am not quite sure where is the best place to find the size of the tuple in > a table. You might want to look at contrib/pageinspect. See also PageGetItemId and ItemIdGetLength. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise Postgres Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
