Michael Stassen wrote:
Alex Gemmell wrote:
<snip>
Thanks Shawn but I couldn't seem to get this to work.
I made the point of checking the MySQL User that PHP connects with. I
gave it CREATE and DROP privilages on the database schema in question.
It previously only had SELECT privilages.
From the manual
<http://dev.mysql.com/doc/refman/5.0/en/create-table.html>:
"You must have the CREATE TEMPORARY TABLES privilege to be able to
create temporary tables."
See the manual for details
<http://dev.mysql.com/doc/refman/5.0/en/privileges-provided.html>.
Here's my PHP code to show you how I tried it:
[PHP]
$query = "CREATE TEMPORARY TABLE tmpSubquery
SELECT * FROM tblactivities
WHERE Assignment_ID='".$row['Assignment_ID']."'
ORDER BY Date DESC LIMIT 10;
SELECT * FROM tmpSubquery ORDER BY Date ASC;
DROP TEMPORARY TABLE tmpSubquery;";
$result_activities = mysql_query($query);
[/PHP]
Even if that would work, it's not a good idea. One query at a time, so
you know what to check when you get an error.
I tried splitting up the queries to see if it helped but it didn't
work either:
Yes, that's the way to go.
[PHP]
$query1 = "CREATE TEMPORARY TABLE tmpSubquery
SELECT * FROM tblactivities
WHERE Assignment_ID='".$row['Assignment_ID']."'
ORDER BY Date DESC LIMIT 10;";
mysql_query($query1);
query2 = "SELECT * FROM tmpSubquery ORDER BY Date ASC;";
$result_activities = mysql_query($query2);
query3 = "DROP TEMPORARY TABLE tmpSubquery;";
mysql_query($query3);
[/PHP]
No semicolons (;) needed in the actual queries from php. The semicolon
is the end-of-query delimiter in the mysql client -- it isn't needed
from php.
Perhaps I am missing something obvious here? I hope you or anyone
else can offer some more help.
You are missing the code which verifies each query worked and prints the
error message if it didn't. If you don't print the error from mysql,
how will you know what to fix?
I recommend following Example 1 in the PHP manual
<http://www.php.net/manual/en/ref.mysql.php#mysql.examples>, but I'd add
that
you should actually print the query string in addition to the error.
That way,
you can verify the query is actually what you intended. With that in
mind, I'd do something like this:
$query = "CREATE TEMPORARY TABLE tmpSubquery
SELECT * FROM tblactivities
WHERE Assignment_ID='".$row['Assignment_ID']."'
ORDER BY Date DESC LIMIT 10";
mysql_query($query) or die("Query: $query failed: " . mysql_error());
$query = "SELECT * FROM tmpSubquery ORDER BY Date ASC";
$result = mysql_query($query)
or die("Query: $query failed: " . mysql_error());
$query = "DROP TEMPORARY TABLE tmpSubquery";
mysql_query($query) or die("Query: $query failed: " . mysql_error());
Alex
Michael
Thanks Micheal - yeah, I managed to figure out the CREATE_TMP_TABLE
privilage problem myself.
I should have used those "die on errors" too - will do next time!
To recap here's the working final solution (after MySQL User has
CREATE_TMP_TABLES and DROP privilages):
[PHP]
$query1 = "CREATE TEMPORARY TABLE tmpSubquery
(SELECT * FROM tblactivities
WHERE Assignment_ID='".$row['Assignment_ID']."'
ORDER BY Date DESC LIMIT 10);";
mysql_query($query1);
$query2 = "SELECT * FROM tmpSubquery ORDER BY Date ASC;";
$result_activities = mysql_query($query2);
$query3 = "DROP TEMPORARY TABLE tmpSubquery;";
mysql_query($query3);
[/PHP]
Thanks all!
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