Re: Threaded Records in SQL: Advice Needed
От | Moray McConnachie |
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Тема | Re: Threaded Records in SQL: Advice Needed |
Дата | |
Msg-id | 008501bfa45b$8162d3a0$760e01a3@oucs.ox.ac.uk обсуждение исходный текст |
Ответ на | RE: Threaded Records in SQL: Advice Needed ("Ingram, Bryan" <BIngram@sixtyfootspider.com>) |
Список | pgsql-sql |
----- Original Message ----- From: "Ingram, Bryan" <BIngram@sixtyfootspider.com> To: "Ingram, Bryan" <BIngram@sixtyfootspider.com>; <mig@utdt.edu> Cc: <pgsql-sql@postgresql.org> Sent: Tuesday, April 11, 2000 9:57 PM Subject: RE: [SQL] Threaded Records in SQL: Advice Needed > In reference to the ascii/numeric ordering problem .. > > But first let me say ..if someone knows of a way to get ascii values to > order as if they were numerics ..please let me in on the secret .. > > Instead of using numbers, if letters were used the ordering would be > correct. > > The id string would become something like: A/A/A for the 1st reply to the > 1st reply of the 1st root message. > > This will work fine for threads with relatively few replies on the same > level. For instance, the number 100 would take only 4 characters to encode, > however, the number 1000 would need 39 characters to encode. More efficient to use letters as numbers in base 26? Then for up to 676 replies per level you need only 2 letters. If you allowed 3, you'd have some headroom. ---------------------------------------------------------------- Moray.McConnachie@computing-services.oxford.ac.uk
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