Manual merge

BitKeeper/etc/ignore:
  auto-union
mysql-test/t/bool.test:
  Auto merged
mysql-test/t/cast.test:
  Auto merged
mysql-test/t/func_concat.test:
  Auto merged
mysql-test/t/grant.test:
  Auto merged
mysql-test/t/grant_cache.test:
  Auto merged
mysql-test/t/innodb-deadlock.test:
  Auto merged
mysql-test/t/loaddata.test:
  Auto merged
mysql-test/t/lowercase_table.test:
  Auto merged
mysql-test/t/lowercase_table3.test:
  Auto merged
mysql-test/t/mix_innodb_myisam_binlog.test:
  Auto merged
mysql-test/t/mysqlbinlog.test:
  Auto merged
mysql-test/t/mysqldump.test:
  Auto merged
mysql-test/t/query_cache.test:
  Auto merged
mysql-test/t/rpl_EE_error.test:
  Auto merged
mysql-test/t/rpl_change_master.test:
  Auto merged
mysql-test/t/rpl_empty_master_crash.test:
  Auto merged
BitKeeper/deleted/.del-isam.test~834fb0ee8196c445:
  Auto merged
BitKeeper/deleted/.del-rpl_trunc_binlog.test~961b1f6ac73d37c8:
  Auto merged
mysql-test/r/flush_block_commit.result:
  Auto merged
mysql-test/r/flush_table.result:
  Auto merged
mysql-test/r/lock_multi.result:
  Auto merged
mysql-test/r/rpl_server_id1.result:
  Auto merged
mysql-test/r/rpl_server_id2.result:
  Auto merged
mysql-test/r/rpl_start_stop_slave.result:
  Auto merged
mysql-test/t/create_select_tmp.test:
  Auto merged
mysql-test/t/ctype_latin1_de.test:
  Auto merged
mysql-test/t/flush_block_commit.test:
  Auto merged
mysql-test/t/func_if.test:
  Auto merged
mysql-test/t/innodb-lock.test:
  Auto merged
mysql-test/t/lock_multi.test:
  Auto merged
mysql-test/t/rpl_drop.test:
  Auto merged
mysql-test/t/rpl_error_ignored_table.test:
  Auto merged
mysql-test/t/rpl_flush_log_loop.test:
  Auto merged
mysql-test/t/rpl_get_lock.test:
  Auto merged
mysql-test/t/rpl_heap.test:
  Auto merged
mysql-test/t/rpl_insert_id.test:
  Auto merged
mysql-test/t/rpl_loaddata.test:
  Auto merged
mysql-test/t/rpl_loaddata_rule_m.test:
  Auto merged
mysql-test/t/rpl_loaddata_rule_s.test:
  Auto merged
mysql-test/t/rpl_loaddatalocal.test:
  Auto merged
mysql-test/t/rpl_max_relay_size.test:
  Auto merged
mysql-test/t/rpl_reset_slave.test:
  Auto merged
mysql-test/t/system_mysql_db.test:
  Auto merged
mysql-test/t/system_mysql_db_fix.test:
  Auto merged
sql/sql_select.cc:
  Auto merged
mysql-test/t/rpl_server_id2.test:
  Auto merged

mysql-test/r/olap.result

@@ -580,6 +580,18 @@ a	LENGTH(a)	COUNT(*)
 2	1	1
 NULL	NULL	2
 DROP TABLE t1;
+create table t1 ( a varchar(9), b int );
+insert into t1 values('a',1),(null,2);
+select a, max(b) from t1 group by a with rollup;
+a	max(b)
+NULL	2
+a	1
+NULL	2
+select distinct a, max(b) from t1 group by a with rollup;
+a	max(b)
+NULL	2
+a	1
+drop table t1;
 CREATE TABLE t1(id int, type char(1));
 INSERT INTO t1 VALUES
 (1,"A"),(2,"C"),(3,"A"),(4,"A"),(5,"B"),

mysql-test/t/olap.test

@@ -274,6 +274,15 @@ SELECT * FROM (SELECT a, LENGTH(a), COUNT(*) FROM t1 GROUP BY a WITH ROLLUP) t;
 
 DROP TABLE t1;
 
+#
+# Bug #12887 Distinct is not always applied after rollup
+#
+create table t1 ( a varchar(9), b int );
+insert into t1 values('a',1),(null,2);
+select a, max(b) from t1 group by a with rollup;
+select distinct a, max(b) from t1 group by a with rollup;
+drop table t1;
+
 # End of 4.1 tests
 
 #
@@ -309,3 +318,4 @@ SELECT * FROM v1;
 
 DROP VIEW v1;
 DROP TABLE t1;
+# End of 4.1 tests

sql/sql_select.cc

@@ -755,7 +755,7 @@ JOIN::optimize()
   }
   if (group_list || tmp_table_param.sum_func_count)
   {
-    if (! hidden_group_fields)
+    if (! hidden_group_fields && rollup.state == ROLLUP::STATE_NONE)
       select_distinct=0;
   }
   else if (select_distinct && tables - const_tables == 1)