| From: | Hannu Krosing <hannu(at)tm(dot)ee> |
|---|---|
| To: | Jan Wieck <wieck(at)debis(dot)com> |
| Cc: | pgman(at)candle(dot)pha(dot)pa(dot)us, pgsql-hackers(at)postgreSQL(dot)org |
| Subject: | Re: [HACKERS] Last thoughts about LONG |
| Date: | 1999-12-11 19:29:15 |
| Message-ID: | 3852A60B.577E39DB@tm.ee |
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| Lists: | pgsql-hackers |
Jan Wieck wrote:
>
> - At CREATE TABLE, a long value relation named
> "_LONG<tablename>" is created for those tables who need it.
> And of course dropped and truncated appropriate. The schema
> of this table is
>
> rowid Oid, -- oid of our main data row
> rowattno int2, -- the attribute number in main data
> chunk_seq int4, -- the part number of this data chunk
> chunk text -- the content of this data chunk
>
> There is a unique index defined on (rowid, rowattno).
>
If you plan to use the same LONGs for multiple versions you will probably
need a refcount int4 too
--------------------
Hannu
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