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Subject: ODBC C API question(s)

Subject: ODBC C API question(s)

2007-03-20       - By Patrick Galbraith

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Reply:     1     2     3     4     5  

Hi all,

I have been using the MySQL client API for quite some time now and am in
the middle of utilising ODBC C API for a current project. I'm wondering
if there is an equivalent call in ODBC for 'mysql_fetch_lengths' ?

Also, I am wondering what the difference is between


SQLDriverConnect(dbc, (void *)1, "DSN=myodbc3patg", SQL_NTS,
      outstr, sizeof(outstr), &outstrlen,
            SQL_DRIVER_COMPLETE);

This fails, and I don't know why.


But this works:

SQLConnect(V_OD_hdbc, (SQLCHAR*) "myodbc3patg", SQL_NTS,
 (SQLCHAR*) "", SQL_NTS,
 (SQLCHAR*) "", SQL_NTS);

What is the difference between the two? Is there any benefit/detriment
to either? The first snippet is from Easysoft's site, the second from
the tutorial on UNIX odbc.

I often see that people use a UID/Password with  ODBC  DSN. Why use a
password and also a DSN? I thought the DSN provides that? If one uses a
DSN with UID/Pass, does the UID/Password for the DSN get over-written?

Also, where are some good sites for the ODBC C API, with examples,
descriptions of the API calls? I have found info at Easysoft's website
as well as UnixODBC website. It seems that so much ODBC programming is
targeted for GUIs. Mine is all system-level that I want to accomplish.

Kind regards, thanks in advance!

Patrick

--
Patrick Galbraith, Senior Programmer
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http://www.grazr.com

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