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87 lines
3.0 KiB
Plaintext
87 lines
3.0 KiB
Plaintext
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Hello! :)
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(Sorry for my english. But if i wrote in portuguese, you wouldn't
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understand nothing. :])
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I found it's the right place to post this. I'm a newcomer in these
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lists. I hope i did it right. :]
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<BOREDOM>
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When i started using SQL, i started with mSQL. I developed a lot
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of useful apps for me and my job with C, mainly because i loved it's
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elegant, simple api. But for a large project i'm doing in these days, i
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thought is was not enough, because it felt a lot of features i started to
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need, like security and subselects. (and it's not free :))
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So after looking at the options, choose to start again with
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postgres. It offered everything that i needed, and the documentation is
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really good (remember me to thank the one who wrote'em).
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But for my little apps, i needed to start porting them to libpq.
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After looking at pq's syntax, i found it was better to write a bridge
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between the mSQL api and libpq. I found that rewriting the libmsql.a
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routines that calls libpq would made things much easier. I guess the
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results are quite good right now.
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</BOREDOM>
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Ok. Lets' summarize it:
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mpgsql.c is the bridge. Acting as a wrapper, it's really good,
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since i could run mSQL. But it's not accurate. Some highlights:
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CONS:
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* It's not well documented
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(this post is it's first documentation attempt, in fact);
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* It doesn't handle field types correctly. I plan to fix it,
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if people start doing feedbacks;
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* It's limited to 10 simultaneous connections. I plan to enhance
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this, i'm just figuring out;
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* I'd like to make it reentrant/thread safe, although i don't
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think this could be done without changing the API structure;
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* Error Management should be better. This is my first priority
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now;
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* Some calls are just empty implementations.
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PROS:
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* the mSQL Monitor runs Okay. :]
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* It's really cool. :)
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* Make mSQL-made applications compatible with postgresql just by
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changing link options.
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* Uses postgreSQL. :]
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* the mSQL API it's far easier to use and understand than libpq.
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Consider this example:
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#include "msql.h"
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void main(int argc, char **argv, char **envp) {
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int sid;
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sid = msqlConnect(NULL); /* Connects via unix socket */
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if (sid >= 0) {
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m_result *rlt;
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m_row *row;
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msqlSelectDB(sid, "hosts");
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if (msqlQuery(sid, "select host_id from hosts")) {
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rlt = msqlStoreResult();
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while (row = (m_row*)msqlFetchRow(rlt))
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printf("hostid: %s\n", row[0]);
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msqlFreeResult(rlt);
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}
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msqlClose(sid);
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}
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}
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I enclose mpgsql.c inside. I'd like to maintain it, and (maybe, am
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i dreaming) make it as part of the pgsql distribution. I guess it doesn't
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depends on me, but mainly on it's acceptance by its users.
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Hm... i forgot: you'll need a msql.h copy, since it's copyrighted
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by Hughes Technologies Pty Ltd. If you haven't it yes, fetch one
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from www.hughes.com.au.
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I would like to catch users ideas. My next goal is to add better
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error handling, and to make it better documented, and try to let relshow
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run through it. :)
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done. Aldrin Leal <aldrin@americasnet.com>
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