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From: Byron Nikolaidis <byronn(at)insightdist(dot)com>
To: Stephen Davies <scldad(at)sdc(dot)com(dot)au>
Cc: PostgreSQL Interfaces <pgsql-interfaces(at)postgreSQL(dot)org>, PostgreSQL general <pgsql-general(at)postgreSQL(dot)org>
Subject: Re: [INTERFACES] SQLPrimaryKeys
Date: 1998-09-21 14:23:33
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-generalpgsql-interfaces

Stephen Davies wrote:

> Hello again.
> Does the SQLPrimaryKeys facility work with 6.3.2 and ODBC 6.30.0249?
> If so, could someone please send me the declaration and a sample of usage.
> If not, how else can I determine which columns comprise a unique key of a
> PostgreSQL table via ODBC?
> (I can successfully access other functions such as SQLColumns. It is just
> SQLPrimaryKeys that is causing me grief at the moment.)

It should work.  I have used it and I tested it with applications such as Visio.  Did you get an
error or something?

Here is a test usage to get the primary keys of the "t1" table:

 result = SQLAllocStmt( self, &hstmt1);

 result = SQLPrimaryKeys(hstmt1, NULL, 0, NULL, 0, "t1", SQL_NTS);

 result = SQLBindCol(hstmt1, 3, SQL_C_CHAR, pktab, sizeof(pktab), &pktab_len);
 result = SQLBindCol(hstmt1, 4, SQL_C_CHAR, pkcol, sizeof(pkcol), &pkcol_len);
 result = SQLBindCol(hstmt1, 5, SQL_C_SHORT, &seq, 0, NULL);

 result = SQLFetch(hstmt1);
 while (result != SQL_NO_DATA_FOUND) {

  qlog("fetch on stmt1: result = %d, pktab='%s', pkcol='%s', seq=%d\n",
   result, pktab, pkcol, seq);

  result = SQLFetch(hstmt1);

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