mysqli handle prepared procedure call with multiple result sets with different columns - php

Question

Is there a way to handle multiple result sets from a single prepared query when the result sets have different columns?
I have a procedure like this:
CREATE PROCEDURE usp_CountAndList (in_SomeValue int)
BEGIN
SELECT COUNT(*) AS ListCount FROM Table WHERE SomeValue = in_SomeValue;
SELECT
Name, Cost, Text
FROM Table WHERE SomeValue = in_SomeValue
ORDER BY
Name
LIMIT 25;
END
And my PHP code looks like this:
$some_value = $_POST["SomeValue"];
if($some_value != null) {
$dbh = mysqli_connect(...connection stuff...) or die ('I cannot connect to the database.');
$query = $dbh->prepare("CALL usp_CountAndList( ? );");
$query->bind_param("i", $some_value);
if($query->execute() == true) {
$meta = $query->result_metadata();
$fields = $meta->fetch_fields();
var_dump($fields);
$query->store_result();
$query->bind_result($list_count);
while($query->fetch()) {
print_r("<TR>");
print_r("<TD>" . $list_count ."</TD>");
print_r("</TR>\n");
}
$query->free_result();
$dbh->next_result();
$meta = $query->result_metadata();
$fields = $meta->fetch_fields();
var_dump($fields);
$query->store_result();
$query->bind_result($name, $cost, $text);
while($query->fetch()) {
print_r("<TR>");
print_r("<TD>" . $name . "</TD>");
print_r("</TR>\n");
}
$query->free_result();
$dbh->next_result();
}
else {
print_r("Query failed: " . $query->error . "<BR>\n");
exit(0);
}
$query->close();
$dbh->close();
}
The issue I'm running into is that it looks like I'm getting the same meta-data for the second result set, even though it is returning a completely different set of columns, which means that my second bind_result call results in the following error:
PHP Warning: mysqli_stmt::bind_result() [<a href='mysqli-stmt.bind-result'>mysqli-stmt.bind-result</a>]: Number of bind variables doesn't match number of fields in prepared statement
I've banged my head against this for a while and am just not clear on what I'm doing wrong...it almost seems like a mysqli bug. Does anyone have some example code to show how to do what I'm attempting?

Answer 1

Basically there are a few requirements to make this work properly...
MYSQL 5.5.3 or higher
PHP 5.3 for mysqlnd support
This is a compile time setting so if you are using shared hosting you probably cannot change this.
Basically in your example, use $query->next_result() instead of $dbh->next_result().
mysqli_stmt::next_result
I've only found one SO example of some else attempting to do this.