question about large object - Mailing list pgsql-hackers

From xie jiong
Subject question about large object
Date
Msg-id 002001c93fd5$4d408df0$0d03a8c0@gym
Whole thread Raw
List pgsql-hackers

 
Hi,
 
I am reading code about large object of pgsql and have a question:
 
in pg_largeobject.h:
 
CATALOG(pg_largeobject,2613) BKI_WITHOUT_OIDS
{
 Oid   loid;   /* Identifier of large object */
 int4  pageno;   /* Page number (starting from 0) */
 bytea  data;   /* Data for page (may be zero-length) */
} FormData_pg_largeobject;
 
what's mean of pageno? or what 's "page" of a large object refer to?
is this "page"(pageno) refer to "chunk"(chunk number) of lob, as opposed to
real data page? (or just one data page to store one chunk of lob)
 
Thanks!
 
Jiong
 

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