Provide an option to tell mysql "set option SQL_BIG_TABLES=1". This

buglist.cgi

@@ -461,6 +461,9 @@ if ($serverpush) {
     }
 }
 
+if (Param('expectbigqueries')) {
+    SendSQL("set option SQL_BIG_TABLES=1");
+}
 SendSQL($query);
 
 my $count = 0;

defparams.pl

@@ -292,5 +292,10 @@ DefParam("usebrowserinfo",
 	 "b",
 	 1);
 
+DefParam("expectbigqueries",
+         "If this is on, then we will tell mysql to <tt>set option SQL_BIG_TABLES=1</tt> before doing queries on bugs.  This will be a little slower, but one will not get the error <tt>The table ### is full</tt> for big queries that require a big temporary table.",
+         "b",
+         0);
+
 1;