Re: [SQL] Column name's length

> And I assume it is working fine?

Yes. It fixes the column length too I think. The following is a psql
interaction:
-----
ssmldb=> create table
more_than_64_bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
(more_than_32_bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb boolean ) ;
CREATE
ssmldb=> select * from
more_than_64_bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
;
more_than_32_bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
---------------------------------------------
(0 rows)
ssmldb=> insert into
more_than_64_bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
( more_than_32_bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb ) values ( true ) ;
INSERT 25353 1
ssmldb=> select * from
more_than_64_bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
;
^Mmore_than_32_bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
---------------------------------------------
t
(1 row)
-----
(I did some tests to make sure all the characters are significant. They
are.)

Here are the two diffs that up the "name size" from 32 characters to 256
characters. (Once I get bit, I try to fix things real good so I don't get
bit again :-))
-----
diff postgresql-6.4.2/src/include/postgres_ext.h postgres-build/src/include/postgres_ext.h
34c34
< #define NAMEDATALEN 32
---
> #define NAMEDATALEN 256
37c37
< #define OIDNAMELEN 36
---
> #define OIDNAMELEN 260
-----
diff postgresql-6.4.2/src/include/storage/buf_internals.h postgres-build/src/include/storage/buf_internals.h
87c87
< #define PADDED_SBUFDESC_SIZE 128
---
> #define PADDED_SBUFDESC_SIZE 1024
-----

After this, I did a clean build. I am pretty sure this produces a Postgres
that *is not* binary compatible with existing databases. You have to do the
dump/reload thing. (We discovered this issue very early on so I was able to
trash all my existing databases and start from scratch.)

I do not know what performance or space usage impact this has. If it is not
too terrible, this would be a great change to see in a future version of
Postgres.

-Z-