Re: [Firebird-devel] Purpose of RDB$RUNTIME field

[Jiri C. <di...@ci...>]

On 30.4.2006 0:05 Claudio Valderrama C. wrote:
> 
> To keep summary information about table/view fields so the engine doesn't
> have to query system tables. It's filled in dfw.epp's make_version() and
> read in met.epp's MET_scan_relation. Blob type 5 is SUMMARY.
> 
>> I was looking, and sub type 5 seems to be some metadata and internet
>> helps, that is used for internal performance improvements.
> 
> Yes.
> 

Thanks for clarification. I helps me a lot!

>> On all my test DBs is this column null.
> 
> Are you saying that
> select rdb$relation_name from rdb$relations where rdb$runtime is not null;
> always returns no records in your databases? This is strange, since this
> field probably predates IB4.

No, I was talking to the rdb$procedures table. This select is ok.

>> I was also looking into source
>> code of current cvs of firebird2, but I was not able to find something
>> interesting (I'm too newbie in FB code, but I have no idea what to
>> search a where, greping code, isn't so good).
> 
> Did you look for RDB$RUNTIME?
> You shouldn't be intimidated, the code is trivial.
> :-)

Of course I did! :) But as I said. I'm too new in the code, so I don't 
know what is what, etc. And what's doing what. I need to find start 
point, and if I did this, then I'm able to find what I'm looking. But FB 
is big SW so orientation is for beginner not so easy. But I'm trying to 
do my best! :)

And also I'm Pascal/Delphi developer and C#/.NET so reading the C/C++ 
ins't so clear for me as reading Pascal, etc.

PS: I'm writing my diploma thesis about FB and system tables and so on, 
so this helps me a lot. Thanks guys.

-- 
Jiri Cincura
http://www.cincura.net/