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get number of rows selected

From: "Malm Paul" <paul(dot)malm(at)saabgroup(dot)com>
To: <pgsql-odbc(at)postgresql(dot)org>
Subject: get number of rows selected
Date: 2008-04-03 13:20:04
Message-ID: 9103513CAFE9554496DD17054510B6DF01287EA1@corpappl002.corp.saab.se (view raw or flat)
Thread:
Lists: pgsql-odbc
Hi,
I dont know much about databases, and I have a question

I've just installed PostgreSLQ.
Now I would like to get the number of rows selected via a ODBC SQL
statement in C++. I would like to know the amount before I do Fetch.
 
This is a little example of what I do in c++:

	selStr="select * from layer where visible = 1");
	rc = SQLAllocHandle(SQL_HANDLE_STMT, ConHandle, &StmtHandle);
	if(rc == SQL_SUCCESS)
	{
		SQLSetStmtOption(StmtHandle, SQL_CONCURRENCY,
SQL_CONCUR_READ_ONLY);
		SQLSetStmtOption(StmtHandle, SQL_CURSOR_TYPE,
SQL_CURSOR_KEYSET_DRIVEN);
		SQLSetStmtOption(StmtHandle, SQL_ROWSET_SIZE, m_rows);
		rc = SQLExecDirect(StmtHandle, (SQLCHAR *)selStr,
SQL_NTS);
...
...
...
How do I know how many rows that was found??


Kind regards,

Paul Malm

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