hi, all
I am so sorry for asking some questions like this!
Recently, for understanding postgresql's optimizer, I read and debug
the source code. these two days, I read these macros in sysattr.h:
...
#define ObjectIdAttributeNumber (-2)
...
and the relative codes, but I still did not know
On Mon, Aug 18, 2014 at 4:42 PM, 土卜皿 pengcz.n...@gmail.com wrote:
Recently, for understanding postgresql's optimizer, I read and debug the
source code. these two days, I read these macros in sysattr.h:
...
#define ObjectIdAttributeNumber (-2)
...
and the relative codes, but I still
hi, Michael
thanks a lot! your reminding lead me go a step forward!
the 7 attributes are system attributes of some table such as pg_class,
pg_type. but now I have a new question:
where and when using these system attributes?
2014-08-18 15:57 GMT+08:00 Michael Paquier
=?UTF-8?B?5Zyf5Y2c55q/?= pengcz.n...@gmail.com writes:
where and when using these system attributes?
http://www.postgresql.org/docs/devel/static/ddl-system-columns.html
regards, tom lane
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