ODBC error in PHP: "No tuples available at this result index"

Question

Been looking for this on Google for a while, but still looking. Couldn't turn up anything on it.

Using PHP to query MS SQL Server via ODBC. Code is below: (I've watered it down to bare-bones as I've tried to debug this)

    $SQL=<<<HEREDOC
DECLARE @weekStart SMALLDATETIME;
SET     @weekStart = DATEADD(d,0, DATEDIFF(d,0,GETDATE()));
SET     @weekStart = DATEADD(d, 1-DATEPART(dw, GETDATE()), @weekStart);

SELECT
    DATEDIFF(week, Run_Date, @weekStart)
                            AS weeksAgo

    ,MIN(Current_List)      AS list

    ,COUNT(*)               AS cnt

    ,SUM(NoContact_90Days)  AS noContact90
    ,SUM(NoContact_180Days) AS noContact180

    ,SUM(NoMtg_180Days)     AS noMtg180
    ,SUM(NoMtg_360Days)     AS noMtg360
FROM
    [someDB].[DBO].[someTable]
WHERE
    Current_List<>''
GROUP BY
    DATEDIFF(week, Run_Date, @weekStart)
    ,Current_List
ORDER BY DATEDIFF(week, Run_Date, @weekStart)

;
HEREDOC;


    $dbUser = "someUser";
    $dbPass = "somePw";
    $connStr = 'Driver={SQL Server};Server=someServer;';

    $conn = odbc_connect($connStr, $dbUser, $dbPass)
        or die("Cannot start ODBC connection");

    $rs = odbc_exec($conn, $SQL);
    $r = odbc_fetch_array($rs);
    die('ok');

Getting a warning I've never seen on the odbc_fetch_array() line:

Message: odbc_fetch_array() [function.odbc-fetch-array]: No tuples available at this result index

I've run the query in SQL Server Mgmt Studio and it returns a single set of records. I'm using this same connection string & method of retrieving the rows in other parts of the app with no problem. Any ideas?

Answer 1

The answer apparently (see comments) was that there is more than one result set and the first one couldn't be handled odbc_fetch_array().
You can switch to the next result set via odbc_next_result()

http://stackoverflow.com/questions/3601954/multiple-result-sets-returned-from-php-odbc-query will probably include a discussion on why there are multiple result sets for this particular query.