>Description:
*** against BK as of set 1.1144 ***
It appears that putting SQL_BUFFER_RESULT and SQL_CALC_FOUND_ROWS
in the same SELECT statement is a really bad idea!
SELECT FOUND_ROWS() after SELECT SQL_BUFFER_RESULT SQL_CALC_FOUND_ROWS
either returns a huge number (too big) or zero.
Removing SQL_BUFFER_RESULT makes FOUND_ROWS() return the correct answer.
>How-To-Repeat:
mysql> SELECT SQL_BUFFER_RESULT SQL_CALC_FOUND_ROWS * FROM Downloads WHERE (match
(Name) against ('+fokker' in boolean mode) or match (Description) against
('+fokker' in boolean mode)) ORDER BY Name LIMIT 0, 10;
<normal, correct output>
mysql> SELECT FOUND_ROWS();
+--------------+
| FOUND_ROWS() |
+--------------+
| 0 | <-- wrong
+--------------+
=====
mysql> SELECT SQL_CALC_FOUND_ROWS * FROM Downloads WHERE (match (Name)
against ('+fokker' in boolean mode) or match (Description) against
('+fokker' in boolean mode)) ORDER BY Name LIMIT 0, 10;
<normal, correct output>
mysql> SELECT FOUND_ROWS();
+--------------+
| FOUND_ROWS() |
+--------------+
| 137 | <-- right
+--------------+
>Fix:
Remove SQL_BUFFER_RESULT when SQL_CALC_FOUND_ROWS is needed, but this is
a bug. (Not sure about coding fix, sorry.)
>Submitter-Id: <submitter ID>
>Originator: Matt Johnson
>Organization: AVSIM Online <http://www.avsim.com>
>MySQL support: none
>Synopsis: SQL_BUFFER_RESULT and SQL_CALC_FOUND_ROWS in same SELECT -> bad
>FOUND_ROWS()
>Severity: serious
>Priority: medium
>Category: mysql
>Class: sw-bug
>Release: mysql-4.0.2-alpha (Source distribution)
>Environment:
System: Linux new-ftp 2.4.17 #1 SMP Mon Jan 21 08:36:59 EST 2002 i686 unknown
Architecture: i686
Some paths: /usr/bin/perl /usr/bin/make /usr/bin/gmake /usr/bin/gcc /usr/bin/cc
GCC: Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.96/specs
gcc version 2.96 20000731 (Red Hat Linux 7.1 2.96-98)
Compilation info: CC='gcc' CFLAGS='' CXX='c++' CXXFLAGS='' LDFLAGS=''
LIBC:
lrwxrwxrwx 1 root root 13 Jan 21 09:26 /lib/libc.so.6 -> libc-2.2.4.so
-rwxr-xr-x 1 root root 5723311 Dec 8 09:04 /lib/libc-2.2.4.so
-rw-r--r-- 1 root root 27314296 Dec 8 09:02 /usr/lib/libc.a
-rw-r--r-- 1 root root 178 Dec 8 09:02 /usr/lib/libc.so
Configure command: ./configure --prefix=/usr/local/mysql-20020302
--enable-thread-safe-client --enable-assembler
--with-unix-socket-path=/var/lib/mysql/mysql.sock --with-mysqld-user=mysql
--without-debug --with-charset=latin1 --with-extra-charsets=none --without-innodb
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