6:51 a.m.
Dear developers,
As the subject said I have a stupid question, what is the advantages
of compile in a database support like:
--8<---------------cut here---------------start------------->8---
Databases:
Compiling in support for Berkeley database.
--8<---------------cut here---------------end--------------->8---
Can I use this in elisp scripts inside XEmacs, If so, how to use it?
Is there any documents/info pages describe this kind of usage?
--
ENCODING
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12:45 p.m.
On Nov 16, 2007 10:51 PM, FKtPp <m_pupil(a)yahoo.com.cn> wrote:
Can I use this in elisp scripts inside XEmacs, If so, how to use it?
Is there any documents/info pages describe this kind of usage?
See the info node (lispref)PostgreSQL Support
An example that the info pages give is
(progn
(setq P (pq-connectdb ""))
;; id is the primary key, shikona is a Japanese word that
;; means `the professional name of a Sumo wrestler', and
;; rank is the Sumo rank name.
(pq-exec P (concat "CREATE TABLE xemacs_test"
" (id int, shikona text, rank text);"))
(pq-exec P "COPY xemacs_test FROM stdin;")
(pq-put-line P "1\tMusashimaru\tYokuzuna\n")
(pq-put-line P "2\tDejima\tOozeki\n")
(pq-put-line P "3\tMusoyama\tSekiwake\n")
(pq-put-line P "4\tMiyabiyama\tSekiwake\n")
(pq-put-line P "5\tWakanoyama\tMaegashira\n")
(pq-put-line P "\\.\n")
(pq-end-copy P))
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2:57 p.m.
Ar an seachtú lá déag de mí na Samhain, scríobh Brian Palmer:
On Nov 16, 2007 10:51 PM, FKtPp <m_pupil(a)yahoo.com.cn> wrote:
> Can I use this in elisp scripts inside XEmacs, If so, how to use it?
> Is there any documents/info pages describe this kind of usage?
See the info node (lispref)PostgreSQL Support
Note that the PostgreSQL support provides a distinct API. The functionality
in database.c is oriented at Berkeley DB and DBM databases, which should
really be viewed as persistent hash tables rather than anything directly
comparable to an SQL database.
An example that the info pages give is
(progn
(setq P (pq-connectdb ""))
;; id is the primary key, shikona is a Japanese word that
;; means `the professional name of a Sumo wrestler', and
;; rank is the Sumo rank name.
(pq-exec P (concat "CREATE TABLE xemacs_test"
" (id int, shikona text, rank text);"))
(pq-exec P "COPY xemacs_test FROM stdin;")
(pq-put-line P "1\tMusashimaru\tYokuzuna\n")
(pq-put-line P "2\tDejima\tOozeki\n")
(pq-put-line P "3\tMusoyama\tSekiwake\n")
(pq-put-line P "4\tMiyabiyama\tSekiwake\n")
(pq-put-line P "5\tWakanoyama\tMaegashira\n")
(pq-put-line P "\\.\n")
(pq-end-copy P))
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--
¿Dónde estará ahora mi sobrino Yoghurtu Nghé, que tuvo que huir
precipitadamente de la aldea por culpa de la escasez de rinocerontes?
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6:58 a.m.
FKtPp writes:
Dear developers,
As the subject said I have a stupid question, what is the advantages
of compile in a database support like:
--8<---------------cut here---------------start------------->8---
Databases:
Compiling in support for Berkeley database.
--8<---------------cut here---------------end--------------->8---
Can I use this in elisp scripts inside XEmacs, If so, how to use it?
Yes. As far as elisp is concerned it's basically just an external
(ie, on-disk) hashtable. Since you have access to the BDB/dbm
functionality, you can tune it for the mind of access that's most
common.
The PostgreSQL support is much more powerful.
Is there any documents/info pages describe this kind of usage?
Not really. I believe that VM supports keeping information about the
summaries in a dbm or Berkeley db database.
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11:38 a.m.
Ar an seachtú lá déag de mí na Samhain, scríobh FKtPp:
Dear developers,
As the subject said I have a stupid question, what is the advantages
of compile in a database support like:
--8<---------------cut here---------------start------------->8---
Databases:
Compiling in support for Berkeley database.
--8<---------------cut here---------------end--------------->8---
Can I use this in elisp scripts inside XEmacs,
Yes.
If so, how to use it?
(setq my-database-handle (open-database (expand-file-name "~/my-database")
'berkeley-db nil "rw+" #o644))
=> #<database "/home/aidan/my-database" (berkeley-db/hash/readwrite)
0x6e7cba>
(put-database "key" "value" my-database-handle)
=> nil
(close-database my-database-handle)
=> nil
(setq my-new-database-handle (open-database (expand-file-name "~/my-database")
'berkeley-db nil "r" #o644))
=> #<database "/home/aidan/my-database" (berkeley-db/hash/readonly)
0x70a2ba>
(get-database "key" my-new-database-handle)
=> "value"
Is there any documents/info pages describe this kind of usage?
Just the docstrings, I'm afraid. F1 f open-database RET , F1 f get-database
RET, and the other most relevant functions are map-database, put-dabase and
remove-database.
The code isn't used much, probably because this support is not available
under GNU Emacs. I intend merging a very hacked version of their
descr-text.el that uses the database support to store index information for
Unihan.txt in the next few weeks though, so that will change a little.
--
¿Dónde estará ahora mi sobrino Yoghurtu Nghé, que tuvo que huir
precipitadamente de la aldea por culpa de la escasez de rinocerontes?
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4 comments
4 participants
participants (4)
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Aidan Kehoe -
Brian Palmer -
FKtPp -
Stephen J. Turnbull