Merge mysql.com:/home/gluh/MySQL/Merge/5.0

into  mysql.com:/home/gluh/MySQL/Merge/5.0-opt


client/mysqldump.c:
  Auto merged
include/config-win.h:
  Auto merged
libmysql/libmysql.c:
  Auto merged
myisam/sort.c:
  Auto merged
mysql-test/r/func_sapdb.result:
  Auto merged
mysql-test/r/variables.result:
  Auto merged
mysql-test/t/variables.test:
  Auto merged
sql/field.cc:
  Auto merged
sql/ha_innodb.cc:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_sum.cc:
  Auto merged
sql/item_timefunc.h:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/set_var.cc:
  Auto merged
sql/sql_acl.cc:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
tests/mysql_client_test.c:
  Auto merged
mysql-test/r/type_datetime.result:
  manual merge
mysql-test/r/type_decimal.result:
  manual merge
mysql-test/t/type_datetime.test:
  manual merge
mysql-test/t/type_decimal.test:
  manual merge
sql/item.cc:
  manual merge

1 files changed, 11 insertions, 0 deletions

diff --git a/mysql-test/r/olap.result b/mysql-test/r/olap.result
index 4a54b17316d..a1d66b11f58 100644
--- a/mysql-test/r/olap.result
+++ b/mysql-test/r/olap.result
@@ -715,3 +715,14 @@ a	SUM(a)
 4	4
 NULL	14
 DROP TABLE t1;
+#
+# Bug#31095: Unexpected NULL constant caused server crash.
+#
+create table t1(a int);
+insert into t1 values (1),(2),(3);
+select count(a) from t1 group by null with rollup;
+count(a)
+3
+3
+drop table t1;
+##############################################################