diff --git a/mysql-test/r/ndb_partition_key.result b/mysql-test/r/ndb_partition_key.result
index 8842a6e1398..90ecde51e9f 100644
--- a/mysql-test/r/ndb_partition_key.result
+++ b/mysql-test/r/ndb_partition_key.result
@@ -89,3 +89,16 @@ ALTER TABLE t1
 PARTITION BY KEY(a)
 (PARTITION p0 ENGINE = NDB, PARTITION p1 ENGINE = NDB);
 drop table t1;
+CREATE TABLE t1 (
+c1 MEDIUMINT NOT NULL AUTO_INCREMENT,
+c2 TEXT NOT NULL,
+c3 INT NOT NULL,
+c4 BIT NOT NULL,
+c5 FLOAT,
+c6 VARCHAR(255),
+c7 TIMESTAMP,
+PRIMARY KEY(c1,c3))
+ENGINE=NDB
+PARTITION BY KEY(c3) PARTITIONS 5;
+ALTER TABLE t1 COALESCE PARTITION 4;
+DROP TABLE t1;
diff --git a/mysql-test/r/partition.result b/mysql-test/r/partition.result
index d84d8e25ef1..228fd626a10 100644
--- a/mysql-test/r/partition.result
+++ b/mysql-test/r/partition.result
@@ -428,6 +428,54 @@ partition by list (a)
 alter table t1 rebuild partition;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
 drop table t1;
+create table t1 (a int)
+partition by list (a)
+(partition p0 values in (5));
+insert into t1 values (0);
+ERROR HY000: Table has no partition for value 0
+drop table t1;
+create table t1 (a int)
+partition by range (a) subpartition by hash (a)
+(partition p0 values less than (100));
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1 PARTITION BY RANGE (a) SUBPARTITION BY HASH (a) (PARTITION p0 VALUES LESS THAN (100) )
+alter table t1 add partition (partition p1 values less than (200)
+(subpartition subpart21));
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1 PARTITION BY RANGE (a) SUBPARTITION BY HASH (a) (PARTITION p0 VALUES LESS THAN (100)  (SUBPARTITION p0sp0 ENGINE = MyISAM), PARTITION p1 VALUES LESS THAN (200)  (SUBPARTITION subpart21 ENGINE = MyISAM))
+drop table t1;
+create table t1 (a int)
+partition by key (a);
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1 PARTITION BY KEY (a) 
+alter table t1 add partition (partition p1);
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) DEFAULT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1 PARTITION BY KEY (a) (PARTITION p0  ENGINE = MyISAM, PARTITION p1  ENGINE = MyISAM)
+drop table t1;
+create table t1 (a int, b int)
+partition by range (a)
+subpartition by hash(a)
+(partition p0 values less than (0) (subpartition sp0),
+partition p1 values less than (1));
+ERROR 42000: Wrong number of subpartitions defined, mismatch with previous setting near ')' at line 5
+create table t1 (a int, b int)
+partition by range (a)
+subpartition by hash(a)
+(partition p0 values less than (0),
+partition p1 values less than (1) (subpartition sp0));
+ERROR 42000: Wrong number of subpartitions defined, mismatch with previous setting near '))' at line 5
 create table t1 (a int) engine=innodb partition by hash(a) ;
 show table status like 't1';
 Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
diff --git a/mysql-test/t/ndb_partition_key.test b/mysql-test/t/ndb_partition_key.test
index 7f6120fe094..22c84bf132e 100644
--- a/mysql-test/t/ndb_partition_key.test
+++ b/mysql-test/t/ndb_partition_key.test
@@ -79,3 +79,32 @@ PARTITION BY KEY(a)
 (PARTITION p0 ENGINE = NDB, PARTITION p1 ENGINE = NDB);
 
 drop table t1;
+
+#
+# BUG 16810 Out of memory when coalesce partition
+#
+CREATE TABLE t1 (
+  c1 MEDIUMINT NOT NULL AUTO_INCREMENT,
+  c2 TEXT NOT NULL,
+  c3 INT NOT NULL,
+  c4 BIT NOT NULL,
+  c5 FLOAT,
+  c6 VARCHAR(255),
+  c7 TIMESTAMP,
+  PRIMARY KEY(c1,c3))
+  ENGINE=NDB
+  PARTITION BY KEY(c3) PARTITIONS 5;
+
+let $j= 11;
+--disable_query_log
+while ($j)
+{
+  eval INSERT INTO t1 VALUES (NULL, "Tested Remotely from Texas, USA", $j,
+b'0',
+                                   $j.00,"By JBM $j","2006-01-26");
+  dec $j;
+}
+--enable_query_log
+ALTER TABLE t1 COALESCE PARTITION 4;
+
+DROP TABLE t1;
diff --git a/mysql-test/t/partition.test b/mysql-test/t/partition.test
index 9ee2bbd36b3..42e39f5fe45 100644
--- a/mysql-test/t/partition.test
+++ b/mysql-test/t/partition.test
@@ -552,6 +552,59 @@ alter table t1 rebuild partition;
 
 drop table t1;
 
+#
+# BUG 15253 Insert that should fail doesn't
+#
+create table t1 (a int)
+partition by list (a)
+(partition p0 values in (5));
+
+--error ER_NO_PARTITION_FOR_GIVEN_VALUE
+insert into t1 values (0);
+
+drop table t1;
+
+#
+# BUG #16370 Subpartitions names not shown in SHOW CREATE TABLE output
+#
+create table t1 (a int)
+partition by range (a) subpartition by hash (a)
+(partition p0 values less than (100));
+
+show create table t1;
+alter table t1 add partition (partition p1 values less than (200)
+(subpartition subpart21));
+
+show create table t1;
+
+drop table t1;
+
+create table t1 (a int)
+partition by key (a);
+
+show create table t1;
+alter table t1 add partition (partition p1);
+show create table t1;
+
+drop table t1;
+
+#
+# BUG 15407 Crash with subpartition
+#
+--error 1064
+create table t1 (a int, b int)
+partition by range (a)
+subpartition by hash(a)
+(partition p0 values less than (0) (subpartition sp0),
+ partition p1 values less than (1));
+
+--error 1064
+create table t1 (a int, b int)
+partition by range (a)
+subpartition by hash(a)
+(partition p0 values less than (0),
+ partition p1 values less than (1) (subpartition sp0));
+
 #
 # Bug #14673: Wrong InnoDB default row format
 #
diff --git a/sql/sql_partition.cc b/sql/sql_partition.cc
index a27e5b1979f..bdcab285510 100644
--- a/sql/sql_partition.cc
+++ b/sql/sql_partition.cc
@@ -4078,6 +4078,7 @@ uint prep_alter_part_table(THD *thd, TABLE *table, ALTER_INFO *alter_info,
        ALTER_REPAIR_PARTITION | ALTER_REBUILD_PARTITION))
   {
     partition_info *tab_part_info= table->part_info;
+    partition_info *alt_part_info= thd->lex->part_info;
     uint flags= 0;
     if (!tab_part_info)
     {
@@ -4143,7 +4144,6 @@ uint prep_alter_part_table(THD *thd, TABLE *table, ALTER_INFO *alter_info,
         partitioning scheme as currently set-up.
         Partitions are always added at the end in ADD PARTITION.
       */
-      partition_info *alt_part_info= thd->lex->part_info;
       uint no_new_partitions= alt_part_info->no_parts;
       uint no_orig_partitions= tab_part_info->no_parts;
       uint check_total_partitions= no_new_partitions + no_orig_partitions;
@@ -4738,6 +4738,12 @@ the generated partition syntax in a correct manner.
     if (alter_info->flags == ALTER_ADD_PARTITION ||
         alter_info->flags == ALTER_REORGANIZE_PARTITION)
     {
+      if (tab_part_info->use_default_subpartitions &&
+          !alt_part_info->use_default_subpartitions)
+      {
+        tab_part_info->use_default_subpartitions= FALSE;
+        tab_part_info->use_default_no_subpartitions= FALSE;
+      }
       if (check_partition_info(tab_part_info, (handlerton**)NULL,
                                table->file, ULL(0)))
       {
diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy
index a2e8f10d706..76ba4810505 100644
--- a/sql/sql_yacc.yy
+++ b/sql/sql_yacc.yy
@@ -3793,7 +3793,15 @@ part_bit_expr:
         ;
 
 opt_sub_partition:
-        /* empty */ {}
+        /* empty */
+        {
+          if (Lex->part_info->no_subparts != 0 &&
+              !Lex->part_info->use_default_subpartitions)
+          {
+            yyerror(ER(ER_PARTITION_WRONG_NO_SUBPART_ERROR));
+            YYABORT;
+          }
+        }
         | '(' sub_part_list ')'
         {
           LEX *lex= Lex;
@@ -3809,6 +3817,11 @@ opt_sub_partition:
           }
           else if (part_info->count_curr_subparts > 0)
           {
+            if (part_info->partitions.elements > 1)
+            {
+              yyerror(ER(ER_PARTITION_WRONG_NO_SUBPART_ERROR));
+              YYABORT;
+            }
             part_info->no_subparts= part_info->count_curr_subparts;
           }
           part_info->count_curr_subparts= 0;