Merge witty.:/Users/mattiasj/clones/mysql-5.1-bug31931.2

into  witty.:/Users/mattiasj/clones/topush-51


mysql-test/r/partition.result:
  Auto merged
mysql-test/suite/ndb/r/ndb_partition_key.result:
  Auto merged
mysql-test/suite/ndb/t/ndb_partition_key.test:
  Auto merged
mysql-test/t/partition.test:
  Auto merged
sql/sql_partition.cc:
  Auto merged
sql/partition_info.cc:
  SCCS merged

mysql-test/r/partition.result

@@ -530,11 +530,9 @@ t1	CREATE TABLE `t1` (
 alter table t1
 partition by key(a)
 (partition p0, partition p1 engine=heap);
-ERROR HY000: The mix of handlers in the partitions is not allowed in this version of MySQL
 alter table t1
 partition by key(a)
 (partition p0 engine=heap, partition p1);
-ERROR HY000: The mix of handlers in the partitions is not allowed in this version of MySQL
 alter table t1
 engine=heap
 partition by key (a)

mysql-test/r/partition_innodb.result

@@ -79,8 +79,7 @@ engine = innodb
 partition by list (a)
 (partition p0 values in (0));
 alter table t1 engine = x;
-Warnings:
-Warning	1286	Unknown table engine 'x'
+ERROR HY000: The mix of handlers in the partitions is not allowed in this version of MySQL
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
@@ -151,9 +150,11 @@ DROP TABLE t1;
 create table t1 (int_column int, char_column char(5))
 PARTITION BY RANGE (int_column) subpartition by key (char_column) subpartitions 2
 (PARTITION p1 VALUES LESS THAN (5) ENGINE = InnoDB);
-alter table t1 PARTITION BY RANGE (int_column)
+alter table t1
+ENGINE = MyISAM
+PARTITION BY RANGE (int_column)
 subpartition by key (char_column) subpartitions 2
-(PARTITION p1 VALUES LESS THAN (5) ENGINE = myisam);
+(PARTITION p1 VALUES LESS THAN (5));
 show create table t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (

mysql-test/suite/ndb/r/ndb_partition_key.result

@@ -105,6 +105,12 @@ PARTITION BY KEY(a)
 drop table t1;
 CREATE TABLE t1 (a int not null primary key);
 ALTER TABLE t1
+ENGINE = NDB
+PARTITION BY KEY(a)
+(PARTITION p0 ENGINE = NDB, PARTITION p1 ENGINE = NDB);
+drop table t1;
+CREATE TABLE t1 (a int not null primary key) ENGINE = NDB;
+ALTER TABLE t1
 PARTITION BY KEY(a)
 (PARTITION p0 ENGINE = NDB, PARTITION p1 ENGINE = NDB);
 drop table t1;
@@ -160,7 +166,6 @@ t1	CREATE TABLE `t1` (
 alter table t1
 partition by key(a)
 (partition p0 engine=ndb, partition p1);
-ERROR HY000: The mix of handlers in the partitions is not allowed in this version of MySQL
 alter table t1
 engine=ndb
 partition by key(a)

mysql-test/suite/ndb/t/ndb_partition_key.test

@@ -79,6 +79,14 @@ drop table t1;
 
 CREATE TABLE t1 (a int not null primary key);
 ALTER TABLE t1
+ENGINE = NDB
+PARTITION BY KEY(a)
+(PARTITION p0 ENGINE = NDB, PARTITION p1 ENGINE = NDB);
+
+drop table t1;
+
+CREATE TABLE t1 (a int not null primary key) ENGINE = NDB;
+ALTER TABLE t1
 PARTITION BY KEY(a)
 (PARTITION p0 ENGINE = NDB, PARTITION p1 ENGINE = NDB);
 
@@ -116,7 +124,10 @@ show create table t1;
 alter table t1 remove partitioning;
 show create table t1;
 
---error ER_MIX_HANDLER_ERROR
+# after bug#31931 was fixed
+# this is OK, since the storage engine is specified
+# on table level before.
+#--error ER_MIX_HANDLER_ERROR
 alter table t1
 partition by key(a)
 (partition p0 engine=ndb, partition p1);

mysql-test/suite/parts/inc/partition_engine.inc

@@ -83,6 +83,7 @@ DROP TABLE t1;
 --echo # 3 Some but not all named partitions or subpartitions get a storage
 --echo #   engine assigned
 --echo #------------------------------------------------------------------------
+--error ER_MIX_HANDLER_ERROR
 eval CREATE TABLE t1 (
 $column_list
 )
@@ -90,10 +91,7 @@ PARTITION BY HASH(f_int1)
 ( PARTITION part1 STORAGE ENGINE = $engine,
   PARTITION part2
 );
-INSERT INTO t1(f_int1,f_int2,f_char1,f_char2,f_charbig)
-SELECT f_int1,f_int2,f_char1,f_char2,f_charbig FROM t0_template;
---source suite/parts/inc/partition_check.inc
-DROP TABLE t1;
+--error ER_MIX_HANDLER_ERROR
 eval CREATE TABLE t1 (
 $column_list
 )
@@ -101,10 +99,7 @@ PARTITION BY HASH(f_int1)
 ( PARTITION part1                         ,
   PARTITION part2 STORAGE ENGINE = $engine
 );
-INSERT INTO t1(f_int1,f_int2,f_char1,f_char2,f_charbig)
-SELECT f_int1,f_int2,f_char1,f_char2,f_charbig FROM t0_template;
---source suite/parts/inc/partition_check.inc
-DROP TABLE t1;
+--error ER_MIX_HANDLER_ERROR
 eval CREATE TABLE t1 (
 $column_list
 )
@@ -117,10 +112,8 @@ SUBPARTITION BY HASH(f_int1)
      (SUBPARTITION subpart21 STORAGE ENGINE = $engine,
       SUBPARTITION subpart22 STORAGE ENGINE = $engine)
 );
-INSERT INTO t1(f_int1,f_int2,f_char1,f_char2,f_charbig)
-SELECT f_int1,f_int2,f_char1,f_char2,f_charbig FROM t0_template;
---source suite/parts/inc/partition_check.inc
-DROP TABLE t1;
+--echo # this should fail with ER_MIX_HANDLER_ERROR
+--echo # after fixing Bug#33722
 eval CREATE TABLE t1 (
 $column_list
 )
@@ -142,6 +135,9 @@ DROP TABLE t1;
 --echo # 4 Storage engine assignment after partition name + after name of
 --echo #   subpartitions belonging to another partition
 --echo #------------------------------------------------------------------------
+--echo # this should work
+--echo # after fixing Bug#33722
+--error ER_MIX_HANDLER_ERROR
 eval CREATE TABLE t1 (
 $column_list
 )
@@ -154,10 +150,13 @@ SUBPARTITION BY HASH(f_int1)
      (SUBPARTITION subpart21 STORAGE ENGINE = $engine,
       SUBPARTITION subpart22 STORAGE ENGINE = $engine)
 );
-INSERT INTO t1(f_int1,f_int2,f_char1,f_char2,f_charbig)
-SELECT f_int1,f_int2,f_char1,f_char2,f_charbig FROM t0_template;
---source suite/parts/inc/partition_check.inc
-DROP TABLE t1;
+#INSERT INTO t1(f_int1,f_int2,f_char1,f_char2,f_charbig)
+#SELECT f_int1,f_int2,f_char1,f_char2,f_charbig FROM t0_template;
+#--source suite/parts/inc/partition_check.inc
+#DROP TABLE t1;
+--echo # this should work
+--echo # after fixing Bug#33722
+--error ER_MIX_HANDLER_ERROR
 eval CREATE TABLE t1 (
 $column_list
 )
@@ -170,10 +169,10 @@ SUBPARTITION BY HASH(f_int1)
      (SUBPARTITION subpart21,
       SUBPARTITION subpart22)
 );
-INSERT INTO t1(f_int1,f_int2,f_char1,f_char2,f_charbig)
-SELECT f_int1,f_int2,f_char1,f_char2,f_charbig FROM t0_template;
---source suite/parts/inc/partition_check.inc
-DROP TABLE t1;
+#INSERT INTO t1(f_int1,f_int2,f_char1,f_char2,f_charbig)
+#SELECT f_int1,f_int2,f_char1,f_char2,f_charbig FROM t0_template;
+#--source suite/parts/inc/partition_check.inc
+#DROP TABLE t1;
 #
 --echo #------------------------------------------------------------------------
 --echo # 5 Precedence of storage engine assignments (if there is any)
@@ -210,6 +209,9 @@ DROP TABLE t1;
 --echo # 6.2 Storage engine assignment after partition name + after
 --echo #     subpartition name
 #     in partition part + in sub partition part
+--echo # this should work
+--echo # after fixing Bug#33722
+--error ER_MIX_HANDLER_ERROR
 eval CREATE TABLE t1 (
 $column_list
 )
@@ -222,10 +224,10 @@ SUBPARTITION BY HASH(f_int1)
      (SUBPARTITION subpart21 STORAGE ENGINE = $engine,
       SUBPARTITION subpart22 STORAGE ENGINE = $engine)
 );
-INSERT INTO t1(f_int1,f_int2,f_char1,f_char2,f_charbig)
-SELECT f_int1,f_int2,f_char1,f_char2,f_charbig FROM t0_template;
---source suite/parts/inc/partition_check.inc
-DROP TABLE t1;
+#INSERT INTO t1(f_int1,f_int2,f_char1,f_char2,f_charbig)
+#SELECT f_int1,f_int2,f_char1,f_char2,f_charbig FROM t0_template;
+#--source suite/parts/inc/partition_check.inc
+#DROP TABLE t1;
 
 --echo #------------------------------------------------------------------------
 --echo # 6 Session default engine differs from engine used within create table

mysql-test/suite/parts/r/ndb_partition_key.result

@@ -88,6 +88,12 @@ PARTITION BY KEY(a)
 drop table t1;
 CREATE TABLE t1 (a int not null primary key);
 ALTER TABLE t1
+ENGINE = NDB
+PARTITION BY KEY(a)
+(PARTITION p0 ENGINE = NDB, PARTITION p1 ENGINE = NDB);
+drop table t1;
+CREATE TABLE t1 (a int not null primary key) ENGINE = NDB;
+ALTER TABLE t1
 PARTITION BY KEY(a)
 (PARTITION p0 ENGINE = NDB, PARTITION p1 ENGINE = NDB);
 drop table t1;
@@ -143,7 +149,6 @@ t1	CREATE TABLE `t1` (
 alter table t1
 partition by key(a)
 (partition p0 engine=ndb, partition p1);
-ERROR HY000: The mix of handlers in the partitions is not allowed in this version of MySQL
 alter table t1
 engine=ndb
 partition by key(a)

mysql-test/suite/parts/t/ndb_partition_key.test

@@ -75,6 +75,14 @@ drop table t1;
 
 CREATE TABLE t1 (a int not null primary key);
 ALTER TABLE t1
+ENGINE = NDB
+PARTITION BY KEY(a)
+(PARTITION p0 ENGINE = NDB, PARTITION p1 ENGINE = NDB);
+
+drop table t1;
+
+CREATE TABLE t1 (a int not null primary key) ENGINE = NDB;
+ALTER TABLE t1
 PARTITION BY KEY(a)
 (PARTITION p0 ENGINE = NDB, PARTITION p1 ENGINE = NDB);
 
@@ -112,7 +120,9 @@ show create table t1;
 alter table t1 remove partitioning;
 show create table t1;
 
---error ER_MIX_HANDLER_ERROR
+#--error ER_MIX_HANDLER_ERROR
+# after fixing bug#31931 this works
+# since it already have ndb on table level
 alter table t1
 partition by key(a)
 (partition p0 engine=ndb, partition p1);

mysql-test/t/partition.test

@@ -53,6 +53,7 @@ create table t1 (id int auto_increment, s1 int, primary key (id));
 insert into t1 values (null,1);
 insert into t1 values (null,6);
 
+-- sorted_result
 select * from t1;
 
 alter table t1 partition by range (id) (
@@ -604,12 +605,14 @@ partition by key (a)
 (partition p0, partition p1);
 show create table t1;
 
---error ER_MIX_HANDLER_ERROR
+# Since alter, it already have ENGINE=HEAP from before on table level
+# -> OK
 alter table t1
 partition by key(a)
 (partition p0, partition p1 engine=heap);
 
---error ER_MIX_HANDLER_ERROR
+# Since alter, it already have ENGINE=HEAP from before on table level
+# -> OK
 alter table t1
 partition by key(a)
 (partition p0 engine=heap, partition p1);

mysql-test/t/partition_innodb.test

@@ -86,6 +86,7 @@ engine = innodb
 partition by list (a)
 (partition p0 values in (0));
 
+-- error ER_MIX_HANDLER_ERROR
 alter table t1 engine = x;
 show create table t1;
 drop table t1;
@@ -164,8 +165,10 @@ DROP TABLE t1;
 create table t1 (int_column int, char_column char(5))
   PARTITION BY RANGE (int_column) subpartition by key (char_column) subpartitions 2
   (PARTITION p1 VALUES LESS THAN (5) ENGINE = InnoDB);
-alter table t1 PARTITION BY RANGE (int_column)
+alter table t1
+ENGINE = MyISAM
+PARTITION BY RANGE (int_column)
    subpartition by key (char_column) subpartitions 2
-  (PARTITION p1 VALUES LESS THAN (5) ENGINE = myisam);
+  (PARTITION p1 VALUES LESS THAN (5));
 show create table t1;
 drop table t1;

sql/partition_info.cc

@@ -419,41 +419,167 @@ char *partition_info::has_unique_names()
 
 
 /*
-  Check that all partitions use the same storage engine.
-  This is currently a limitation in this version.
+  Check that the partition/subpartition is setup to use the correct
+  storage engine
+  SYNOPSIS
+    check_engine_condition()
+    p_elem                   Partition element
+    table_engine_set         Have user specified engine on table level
+    inout::engine_type       Current engine used
+    inout::first             Is it first partition
+  RETURN VALUE
+    TRUE                     Failed check
+    FALSE                    Ok
+  DESCRIPTION
+    Specified engine for table and partitions p0 and pn
+    Must be correct both on CREATE and ALTER commands
+    table p0 pn res (0 - OK, 1 - FAIL)
+        -  -  - 0
+        -  -  x 1
+        -  x  - 1
+        -  x  x 0
+        x  -  - 0
+        x  -  x 0
+        x  x  - 0
+        x  x  x 0
+    i.e:
+    - All subpartitions must use the same engine
+      AND it must be the same as the partition.
+    - All partitions must use the same engine
+      AND it must be the same as the table.
+    - if one does NOT specify an engine on the table level
+      then one must either NOT specify any engine on any
+      partition/subpartition OR for ALL partitions/subpartitions
+    Note:
+    When ALTER a table, the engines are already set for all levels
+    (table, all partitions and subpartitions). So if one want to
+    change the storage engine, one must specify it on the table level
+
+*/
+
+static bool check_engine_condition(partition_element *p_elem,
+                                   bool table_engine_set,
+                                   handlerton **engine_type,
+                                   bool *first)
+{
+  DBUG_ENTER("check_engine_condition");
+
+  DBUG_PRINT("enter", ("p_eng %u t_eng %u t_eng_set %u first %u state %u",
+                       ha_legacy_type(p_elem->engine_type),
+                       ha_legacy_type(*engine_type),
+                       table_engine_set, *first, p_elem->part_state));
+  if (*first && !table_engine_set)
+  {
+    *engine_type= p_elem->engine_type;
+    DBUG_PRINT("info", ("setting table_engine = %u",
+                         ha_legacy_type(*engine_type)));
+  }
+  *first= FALSE;
+  if ((table_engine_set &&
+      (p_elem->engine_type != (*engine_type) &&
+       p_elem->engine_type)) ||
+      (!table_engine_set &&
+       p_elem->engine_type != (*engine_type)))
+  {
+    DBUG_RETURN(TRUE);
+  }
+  else
+  {
+    DBUG_RETURN(FALSE);
+  }
+}
+
 
+/*
+  Check engine mix that it is correct
+  Current limitation is that all partitions and subpartitions
+  must use the same storage engine.
   SYNOPSIS
     check_engine_mix()
-    engine_array           An array of engine identifiers
-    no_parts               Total number of partitions
-
+    inout::engine_type       Current engine used
+    table_engine_set         Have user specified engine on table level
   RETURN VALUE
-    TRUE                   Error, mixed engines
-    FALSE                  Ok, no mixed engines
+    TRUE                     Error, mixed engines
+    FALSE                    Ok, no mixed engines
   DESCRIPTION
     Current check verifies only that all handlers are the same.
     Later this check will be more sophisticated.
+    (specified partition handler ) specified table handler
+    (NDB, NDB) NDB           OK
+    (MYISAM, MYISAM) -       OK
+    (MYISAM, -)      -       NOT OK
+    (MYISAM, -)    MYISAM    OK
+    (- , MYISAM)   -         NOT OK
+    (- , -)        MYISAM    OK
+    (-,-)          -         OK
+    (NDB, MYISAM) *          NOT OK
 */
 
-bool partition_info::check_engine_mix(handlerton **engine_array, uint no_parts)
+bool partition_info::check_engine_mix(handlerton *engine_type,
+                                      bool table_engine_set)
 {
-  uint i= 0;
+  handlerton *old_engine_type= engine_type;
+  bool first= TRUE;
+  uint no_parts= partitions.elements;
   DBUG_ENTER("partition_info::check_engine_mix");
-
-  do
+  DBUG_PRINT("info", ("in: engine_type = %u, table_engine_set = %u",
+                       ha_legacy_type(engine_type),
+                       table_engine_set));
+  if (no_parts)
   {
-    if (engine_array[i] != engine_array[0])
+    List_iterator<partition_element> part_it(partitions);
+    uint i= 0;
+    do
     {
-      my_error(ER_MIX_HANDLER_ERROR, MYF(0));
-      DBUG_RETURN(TRUE);
-    }
-  } while (++i < no_parts);
-  if (engine_array[0]->flags & HTON_NO_PARTITION)
+      partition_element *part_elem= part_it++;
+      DBUG_PRINT("info", ("part = %d engine = %d table_engine_set %u",
+                 i, ha_legacy_type(part_elem->engine_type),
+                 table_engine_set));
+      if (is_sub_partitioned() &&
+          part_elem->subpartitions.elements)
+      {
+        uint no_subparts= part_elem->subpartitions.elements;
+        uint j= 0;
+        List_iterator<partition_element> sub_it(part_elem->subpartitions);
+        do
+        {
+          partition_element *sub_elem= sub_it++;
+          DBUG_PRINT("info", ("sub = %d engine = %u table_engie_set %u",
+                     j, ha_legacy_type(sub_elem->engine_type),
+                     table_engine_set));
+          if (check_engine_condition(sub_elem, table_engine_set,
+                                     &engine_type, &first))
+            goto error;
+        } while (++j < no_subparts);
+        /* ensure that the partition also has correct engine */
+        if (check_engine_condition(part_elem, table_engine_set,
+                                   &engine_type, &first))
+          goto error;
+      }
+      else if (check_engine_condition(part_elem, table_engine_set,
+                                      &engine_type, &first))
+        goto error;
+    } while (++i < no_parts);
+  }
+  DBUG_PRINT("info", ("engine_type = %u",
+                       ha_legacy_type(engine_type)));
+  if (!engine_type)
+    engine_type= old_engine_type;
+  if (engine_type->flags & HTON_NO_PARTITION)
   {
     my_error(ER_PARTITION_MERGE_ERROR, MYF(0));
     DBUG_RETURN(TRUE);
   }
+  DBUG_PRINT("info", ("out: engine_type = %u",
+                       ha_legacy_type(engine_type)));
+  DBUG_ASSERT(engine_type != partition_hton);
   DBUG_RETURN(FALSE);
+error:
+  /*
+    Mixed engines not yet supported but when supported it will need
+    the partition handler
+  */
+  DBUG_RETURN(TRUE);
 }
 
 
@@ -726,12 +852,12 @@ bool partition_info::check_partition_info(THD *thd, handlerton **eng_type,
                                           handler *file, HA_CREATE_INFO *info,
                                           bool check_partition_function)
 {
-  handlerton **engine_array= NULL;
-  uint part_count= 0;
+  handlerton *table_engine= default_engine_type;
   uint i, tot_partitions;
-  bool result= TRUE;
+  bool result= TRUE, table_engine_set;
   char *same_name;
   DBUG_ENTER("partition_info::check_partition_info");
+  DBUG_ASSERT(default_engine_type != partition_hton);
 
   if (check_partition_function)
   {
@@ -777,23 +903,49 @@ bool partition_info::check_partition_info(THD *thd, handlerton **eng_type,
     my_error(ER_TOO_MANY_PARTITIONS_ERROR, MYF(0));
     goto end;
   }
+  /*
+    if NOT specified ENGINE = <engine>:
+      If Create, always use create_info->db_type
+      else, use previous tables db_type 
+      either ALL or NONE partition should be set to
+      default_engine_type when not table_engine_set
+      Note: after a table is created its storage engines for
+      the table and all partitions/subpartitions are set.
+      So when ALTER it is already set on table level
+  */
+  if (thd->lex->create_info.used_fields & HA_CREATE_USED_ENGINE)
+  {
+    table_engine_set= TRUE;
+    table_engine= thd->lex->create_info.db_type;
+  }
+  else
+  {
+    table_engine_set= FALSE;
+    if (thd->lex->sql_command != SQLCOM_CREATE_TABLE)
+    {
+      table_engine_set= TRUE;
+      DBUG_ASSERT(table_engine && table_engine != partition_hton);
+    }
+  }
+
   if ((same_name= has_unique_names()))
   {
     my_error(ER_SAME_NAME_PARTITION, MYF(0), same_name);
     goto end;
   }
-  engine_array= (handlerton**)my_malloc(tot_partitions * sizeof(handlerton *), 
-                                        MYF(MY_WME));
-  if (unlikely(!engine_array))
-    goto end;
   i= 0;
   {
     List_iterator<partition_element> part_it(partitions);
+    uint no_parts_not_set= 0;
+    uint prev_no_subparts_not_set= no_subparts + 1;
     do
     {
       partition_element *part_elem= part_it++;
       if (part_elem->engine_type == NULL)
+      {
+        no_parts_not_set++;
         part_elem->engine_type= default_engine_type;
+      }
 #ifdef HAVE_READLINK
       if (!my_use_symdir || (thd->variables.sql_mode & MODE_NO_DIR_IN_CREATE))
 #endif
@@ -814,13 +966,13 @@ bool partition_info::check_partition_info(THD *thd, handlerton **eng_type,
           my_error(ER_WRONG_PARTITION_NAME, MYF(0));
           goto end;
         }
-        DBUG_PRINT("info", ("engine = %d",
-                   ha_legacy_type(part_elem->engine_type)));
-        engine_array[part_count++]= part_elem->engine_type;
+        DBUG_PRINT("info", ("part = %d engine = %d",
+                   i, ha_legacy_type(part_elem->engine_type)));
       }
       else
       {
         uint j= 0;
+        uint no_subparts_not_set= 0;
         List_iterator<partition_element> sub_it(part_elem->subpartitions);
         do
         {
@@ -832,19 +984,49 @@ bool partition_info::check_partition_info(THD *thd, handlerton **eng_type,
             goto end;
           }
           if (sub_elem->engine_type == NULL)
+          {
             sub_elem->engine_type= default_engine_type;
-          DBUG_PRINT("info", ("engine = %u",
-                     ha_legacy_type(sub_elem->engine_type)));
-          engine_array[part_count++]= sub_elem->engine_type;
+            no_subparts_not_set++;
+          }
+          DBUG_PRINT("info", ("part = %d sub = %d engine = %u",
+                     i, j, ha_legacy_type(sub_elem->engine_type)));
         } while (++j < no_subparts);
+        if (prev_no_subparts_not_set == (no_subparts + 1))
+          prev_no_subparts_not_set= no_subparts_not_set;
+        if (!table_engine_set &&
+            prev_no_subparts_not_set == no_subparts_not_set &&
+            no_subparts_not_set != 0 &&
+            no_subparts_not_set != no_subparts)
+        {
+          DBUG_PRINT("info", ("no_subparts_not_set = %u no_subparts = %u",
+                     no_subparts_not_set, no_subparts));
+          my_error(ER_MIX_HANDLER_ERROR, MYF(0));
+          goto end;
+        }
       }
     } while (++i < no_parts);
+    if (!table_engine_set &&
+        no_parts_not_set != 0 &&
+        no_parts_not_set != no_parts)
+    {
+      DBUG_PRINT("info", ("no_parts_not_set = %u no_parts = %u",
+                 no_parts_not_set, no_subparts));
+      my_error(ER_MIX_HANDLER_ERROR, MYF(0));
+      goto end;
+    }
   }
-  if (unlikely(partition_info::check_engine_mix(engine_array, part_count)))
+  if (unlikely(check_engine_mix(table_engine, table_engine_set)))
+  {
+    my_error(ER_MIX_HANDLER_ERROR, MYF(0));
     goto end;
+  }
 
+  if (table_engine == partition_hton)
+    DBUG_PRINT("info", ("Table engine set to partition_hton"));
+  DBUG_ASSERT(default_engine_type == table_engine);
   if (eng_type)
-    *eng_type= (handlerton*)engine_array[0];
+    *eng_type= table_engine;
+
 
   /*
     We need to check all constant expressions that they are of the correct
@@ -860,7 +1042,6 @@ bool partition_info::check_partition_info(THD *thd, handlerton **eng_type,
   }
   result= FALSE;
 end:
-  my_free((char*)engine_array,MYF(MY_ALLOW_ZERO_PTR));
   DBUG_RETURN(result);
 }
 

sql/partition_info.h

@@ -269,7 +269,7 @@ public:
   bool set_up_defaults_for_partitioning(handler *file, HA_CREATE_INFO *info,
                                         uint start_no);
   char *has_unique_names();
-  static bool check_engine_mix(handlerton **engine_array, uint no_parts);
+  bool check_engine_mix(handlerton *engine_type, bool default_engine);
   bool check_range_constants();
   bool check_list_constants();
   bool check_partition_info(THD *thd, handlerton **eng_type,

sql/sql_partition.cc

@@ -3863,6 +3863,8 @@ bool mysql_unpack_partition(THD *thd,
   if (!part_info->default_engine_type)
     part_info->default_engine_type= default_db_type;
   DBUG_ASSERT(part_info->default_engine_type == default_db_type);
+  DBUG_ASSERT(part_info->default_engine_type->db_type != DB_TYPE_UNKNOWN);
+  DBUG_ASSERT(part_info->default_engine_type != partition_hton);
 
   {
   /*
@@ -3996,56 +3998,6 @@ static int fast_end_partition(THD *thd, ulonglong copied,
 }
 
 
-/*
-  Check engine mix that it is correct
-  SYNOPSIS
-    check_engine_condition()
-    p_elem                   Partition element
-    default_engine           Have user specified engine on table level
-    inout::engine_type       Current engine used
-    inout::first             Is it first partition
-  RETURN VALUE
-    TRUE                     Failed check
-    FALSE                    Ok
-  DESCRIPTION
-    (specified partition handler ) specified table handler
-    (NDB, NDB) NDB           OK
-    (MYISAM, MYISAM) -       OK
-    (MYISAM, -)      -       NOT OK
-    (MYISAM, -)    MYISAM    OK
-    (- , MYISAM)   -         NOT OK
-    (- , -)        MYISAM    OK
-    (-,-)          -         OK
-    (NDB, MYISAM) *          NOT OK
-*/
-
-static bool check_engine_condition(partition_element *p_elem,
-                                   bool default_engine,
-                                   handlerton **engine_type,
-                                   bool *first)
-{
-  DBUG_ENTER("check_engine_condition");
-
-  DBUG_PRINT("enter", ("def_eng = %u, first = %u", default_engine, *first));
-  if (*first && default_engine)
-  {
-    *engine_type= p_elem->engine_type;
-  }
-  *first= FALSE;
-  if ((!default_engine &&
-      (p_elem->engine_type != (*engine_type) &&
-       p_elem->engine_type)) ||
-      (default_engine &&
-       p_elem->engine_type != (*engine_type)))
-  {
-    DBUG_RETURN(TRUE);
-  }
-  else
-  {
-    DBUG_RETURN(FALSE);
-  }
-}
-
 /*
   We need to check if engine used by all partitions can handle
   partitioning natively.
@@ -4070,52 +4022,30 @@ static bool check_engine_condition(partition_element *p_elem,
 static bool check_native_partitioned(HA_CREATE_INFO *create_info,bool *ret_val,
                                      partition_info *part_info, THD *thd)
 {
-  List_iterator<partition_element> part_it(part_info->partitions);
-  bool first= TRUE;
-  bool default_engine;
-  handlerton *engine_type= create_info->db_type;
+  bool table_engine_set;
+  handlerton *engine_type= part_info->default_engine_type;
   handlerton *old_engine_type= engine_type;
-  uint i= 0;
-  uint no_parts= part_info->partitions.elements;
   DBUG_ENTER("check_native_partitioned");
 
-  default_engine= (create_info->used_fields & HA_CREATE_USED_ENGINE) ?
-                   FALSE : TRUE;
-  DBUG_PRINT("info", ("engine_type = %u, default = %u",
-                       ha_legacy_type(engine_type),
-                       default_engine));
-  if (no_parts)
+  if (create_info->used_fields & HA_CREATE_USED_ENGINE)
   {
-    do
+    table_engine_set= TRUE;
+    engine_type= create_info->db_type;
+  }
+  else
+  {
+    table_engine_set= FALSE;
+    if (thd->lex->sql_command != SQLCOM_CREATE_TABLE)
     {
-      partition_element *part_elem= part_it++;
-      if (part_info->is_sub_partitioned() &&
-          part_elem->subpartitions.elements)
-      {
-        uint no_subparts= part_elem->subpartitions.elements;
-        uint j= 0;
-        List_iterator<partition_element> sub_it(part_elem->subpartitions);
-        do
-        {
-          partition_element *sub_elem= sub_it++;
-          if (check_engine_condition(sub_elem, default_engine,
-                                     &engine_type, &first))
-            goto error;
-        } while (++j < no_subparts);
-        /*
-          In case of subpartitioning and defaults we allow that only
-          subparts have specified engines, as long as the parts haven't
-          specified the wrong engine it's ok.
-        */
-        if (check_engine_condition(part_elem, FALSE,
-                                   &engine_type, &first))
-          goto error;
-      }
-      else if (check_engine_condition(part_elem, default_engine,
-                                      &engine_type, &first))
-        goto error;
-    } while (++i < no_parts);
+      table_engine_set= TRUE;
+      DBUG_ASSERT(engine_type && engine_type != partition_hton);
+    }
   }
+  DBUG_PRINT("info", ("engine_type = %u, table_engine_set = %u",
+                       ha_legacy_type(engine_type),
+                       table_engine_set));
+  if (part_info->check_engine_mix(engine_type, table_engine_set))
+    goto error;
 
   /*
     All engines are of the same type. Check if this engine supports
@@ -4212,7 +4142,7 @@ uint prep_alter_part_table(THD *thd, TABLE *table, Alter_info *alter_info,
       my_error(ER_PARTITION_MGMT_ON_NONPARTITIONED, MYF(0));
       DBUG_RETURN(TRUE);
     }
-    if (alter_info->flags == ALTER_TABLE_REORG)
+    if (alter_info->flags & ALTER_TABLE_REORG)
     {
       uint new_part_no, curr_part_no;
       if (tab_part_info->part_type != HASH_PARTITION ||
@@ -4543,7 +4473,7 @@ that are reorganised.
         tab_part_info->is_auto_partitioned= FALSE;
       }
     }
-    else if (alter_info->flags == ALTER_DROP_PARTITION)
+    else if (alter_info->flags & ALTER_DROP_PARTITION)
     {
       /*
         Drop a partition from a range partition and list partitioning is
@@ -4747,7 +4677,7 @@ state of p1.
         tab_part_info->is_auto_partitioned= FALSE;
       }
     }
-    else if (alter_info->flags == ALTER_REORGANIZE_PARTITION)
+    else if (alter_info->flags & ALTER_REORGANIZE_PARTITION)
     {
       /*
         Reorganise partitions takes a number of partitions that are next
@@ -4928,8 +4858,8 @@ the generated partition syntax in a correct manner.
     }
     *partition_changed= TRUE;
     thd->work_part_info= tab_part_info;
-    if (alter_info->flags == ALTER_ADD_PARTITION ||
-        alter_info->flags == ALTER_REORGANIZE_PARTITION)
+    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)
@@ -5056,13 +4986,21 @@ the generated partition syntax in a correct manner.
         DBUG_PRINT("info", ("partition changed"));
         *partition_changed= TRUE;
       }
-      if (create_info->db_type == partition_hton)
+      /*
+        Set up partition default_engine_type either from the create_info
+        or from the previus table
+      */
+      if (create_info->used_fields & HA_CREATE_USED_ENGINE)
+        part_info->default_engine_type= create_info->db_type;
+      else
       {
-        if (!part_info->default_engine_type)
+        if (table->part_info)
           part_info->default_engine_type= table->part_info->default_engine_type;
+        else
+          part_info->default_engine_type= create_info->db_type;
       }
-      else
-        part_info->default_engine_type= create_info->db_type;
+      DBUG_ASSERT(part_info->default_engine_type &&
+                  part_info->default_engine_type != partition_hton);
       if (check_native_partitioned(create_info, &is_native_partitioned,
                                    part_info, thd))
       {
@@ -6160,7 +6098,7 @@ uint fast_alter_partition_table(THD *thd, TABLE *table,
       goto err;
     }
   }
-  else if (alter_info->flags == ALTER_DROP_PARTITION)
+  else if (alter_info->flags & ALTER_DROP_PARTITION)
   {
     /*
       Now after all checks and setting state on dropped partitions we can