merge with 4.0

BitKeeper/etc/ignore:
  auto-union
BitKeeper/etc/logging_ok:
  auto-union
BUILD/SETUP.sh:
  Auto merged
BUILD/compile-pentium-debug:
  Auto merged
BitKeeper/triggers/post-commit:
  Auto merged
configure.in:
  Auto merged
Docs/manual.texi:
  Auto merged
client/mysql.cc:
  Auto merged
client/mysqldump.c:
  Auto merged
client/mysqltest.c:
  Auto merged
extra/mysql_install.c:
  Auto merged
extra/resolve_stack_dump.c:
  Auto merged
extra/resolveip.c:
  Auto merged
include/my_sys.h:
  Auto merged
include/mysqld_error.h:
  Auto merged
isam/pack_isam.c:
  Auto merged
libmysql/Makefile.shared:
  Auto merged
libmysql/libmysql.c:
  Auto merged
myisam/ft_dump.c:
  Auto merged
myisam/ft_test1.c:
  Auto merged
myisam/ftdefs.h:
  Auto merged
myisam/mi_check.c:
  Auto merged
myisam/mi_test1.c:
  Auto merged
myisam/mi_write.c:
  Auto merged
myisam/myisamchk.c:
  Auto merged
myisam/myisampack.c:
  Auto merged
mysql-test/mysql-test-run.sh:
  Auto merged
mysql-test/r/select_found.result:
  Auto merged
mysql-test/t/select_found.test:
  Auto merged
mysys/charset.c:
  Auto merged
mysys/default.c:
  Auto merged
mysys/hash.c:
  Auto merged
sql/field.cc:
  Auto merged
sql/gen_lex_hash.cc:
  Auto merged
sql/ha_innodb.cc:
  Auto merged
sql/hostname.cc:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/item_strfunc.cc:
  Auto merged
sql/item_timefunc.h:
  Auto merged
sql/lex.h:
  Auto merged
sql/log.cc:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/repl_failsafe.cc:
  Auto merged
sql/slave.cc:
  Auto merged
sql/sql_acl.cc:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_cache.cc:
  Auto merged
sql/sql_class.cc:
  Auto merged
sql/sql_class.h:
  Auto merged
sql/sql_db.cc:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_string.cc:
  Auto merged
sql/sql_table.cc:
  Auto merged
sql/sql_union.cc:
  Auto merged
sql/share/czech/errmsg.txt:
  Auto merged
sql/share/danish/errmsg.txt:
  Auto merged
sql/share/dutch/errmsg.txt:
  Auto merged
sql/share/english/errmsg.txt:
  Auto merged
sql/share/estonian/errmsg.txt:
  Auto merged
sql/share/german/errmsg.txt:
  Auto merged
sql/share/greek/errmsg.txt:
  Auto merged
sql/share/hungarian/errmsg.txt:
  Auto merged
sql/share/italian/errmsg.txt:
  Auto merged
sql/share/japanese/errmsg.txt:
  Auto merged
sql/share/korean/errmsg.txt:
  Auto merged
sql/share/norwegian-ny/errmsg.txt:
  Auto merged
sql/share/norwegian/errmsg.txt:
  Auto merged
sql/sql_update.cc:
  Auto merged
sql/structs.h:
  Auto merged
sql/share/polish/errmsg.txt:
  Auto merged
sql/share/portuguese/errmsg.txt:
  Auto merged
sql/share/romanian/errmsg.txt:
  Auto merged
sql/share/russian/errmsg.txt:
  Auto merged
sql/share/slovak/errmsg.txt:
  Auto merged
sql/share/spanish/errmsg.txt:
  Auto merged
sql/share/swedish/errmsg.txt:
  Auto merged
sql/share/ukrainian/errmsg.txt:
  Auto merged
strings/Makefile.am:
  Auto merged
strings/ctype-ujis.c:
  Auto merged
tools/mysqlmanager.c:
  Auto merged

1 files changed, 10 insertions, 0 deletions

diff --git a/mysql-test/t/func_isnull.test b/mysql-test/t/func_isnull.test
new file mode 100644
index 00000000000..bd3bcd8d04c
--- /dev/null
+++ b/mysql-test/t/func_isnull.test
@@ -0,0 +1,10 @@
+#
+# test of ISNULL()
+#
+
+drop table if exists t1;
+create table t1 (id int auto_increment primary key not null, mydate date not null);
+insert into t1 values (0,"2002-05-01"),(0,"2002-05-01"),(0,"2002-05-01");
+flush tables;
+select * from t1 where isnull(to_days(mydate));
+drop table t1;