Re: Give me details of some attributes!!

On Sun, 2023-02-26 at 22:29 +0800, jack...@gmail.com wrote: > > here are the source codes from src/include/access/htup_details.h. > /* >  * information stored in t_infomask: >  */ > #define HEAP_HASNULL 0x0001 /* has null attribute(s) */ > #define HEAP_HASVARWIDTH 0x

Give me details of some attributes!!

here are the source codes from src/include/access/htup_details.h. /* * information stored in t_infomask: */ #define HEAP_HASNULL 0x0001 /* has null attribute(s) */ #define HEAP_HASVARWIDTH 0x0002 /* has variable-width attribute(s) */ #define HEAP_HASEXTERNAL 0x0004 /* has external stored attribu