This patch updates to remove most global hton needs. Cleans up wrong message in partition.

mysql-test/r/partition.result:
  Updated results
sql/ha_ndbcluster.cc:
  Updated hton
sql/ha_partition.cc:
  Removed need for global internal hton.
sql/handler.cc:
  Removed need for global mrg
sql/mysql_priv.h:
  Updated needs for global variables.
sql/mysqld.cc:
  Removed needs around hton
sql/partition_info.cc:
  Removed bug.... aka what happens if tables are neither?
sql/share/errmsg.txt:
  Made error message more generic.
sql/sql_cache.cc:
  Removed specific hton reference

mysql-test/r/partition.result

@@ -68,7 +68,7 @@ create table t1 (a int)
 engine = csv
 partition by list (a)
 (partition p0 values in (null));
-ERROR HY000: CSV handler cannot be used in partitioned tables
+ERROR HY000: Engine cannot be used in partitioned tables
 create table t1 (a bigint)
 partition by range (a)
 (partition p0 values less than (0xFFFFFFFFFFFFFFFF),
@@ -102,7 +102,7 @@ create table t1 (a int)
 engine = csv
 partition by list (a)
 (partition p0 values in (null));
-ERROR HY000: CSV handler cannot be used in partitioned tables
+ERROR HY000: Engine cannot be used in partitioned tables
 create table t1 (a int)
 partition by key(a)
 (partition p0 engine = MEMORY);
@@ -1054,7 +1054,7 @@ drop table t1;
 create table t1 (a int)
 partition by key (a)
 (partition p0 engine = MERGE);
-ERROR HY000: MyISAM Merge handler cannot be used in partitioned tables
+ERROR HY000: Engine cannot be used in partitioned tables
 create table t1 (a varchar(1))
 partition by key (a)
 as select 'a';

sql/ha_ndbcluster.cc

@@ -87,7 +87,7 @@ static int ndbcluster_fill_files_table(handlerton *hton,
                                        TABLE_LIST *tables, 
                                        COND *cond);
 
-handlerton *ndbcluster_hton;
+static handlerton *ndbcluster_hton;
 
 static handler *ndbcluster_create_handler(handlerton *hton,
                                           TABLE_SHARE *table,

sql/ha_partition.cc

@@ -75,11 +75,11 @@ static handler *partition_create_handler(handlerton *hton,
 static uint partition_flags();
 static uint alter_table_flags(uint flags);
 
-handlerton *partition_hton;
 
 static int partition_initialize(void *p)
 {
 
+  handlerton *partition_hton;
   partition_hton= (handlerton *)p;
 
   partition_hton->state= SHOW_OPTION_YES;

sql/handler.cc

@@ -467,13 +467,11 @@ int ha_initialize_handlerton(st_plugin_int *plugin)
   }
   
   /* 
-    This is entirely for legacy. We will create a new "disk based" hton and a "memory" hton
-    which will be configurable longterm. 
+    This is entirely for legacy. We will create a new "disk based" hton and a 
+    "memory" hton which will be configurable longterm. We should be able to 
+    remove partition and myisammrg.
   */
   switch (hton->db_type) {
-  case DB_TYPE_MRG_ISAM:
-    myisammrg_hton= hton;
-    break;
   case DB_TYPE_HEAP:
     heap_hton= hton;
     break;

sql/mysql_priv.h

@@ -1638,11 +1638,7 @@ extern SHOW_COMP_OPTION have_ndbcluster;
 extern SHOW_COMP_OPTION have_partition_db;
 extern SHOW_COMP_OPTION have_merge_db;
 
-#ifdef WITH_NDBCLUSTER_STORAGE_ENGINE
-extern handlerton *ndbcluster_hton;
-#endif
 extern handlerton *partition_hton;
-extern handlerton *myisammrg_hton;
 extern handlerton *myisam_hton;
 extern handlerton *heap_hton;
 

sql/mysqld.cc

@@ -358,10 +358,9 @@ my_bool	opt_innodb;
 /*
   Legacy global handlerton. These will be removed (please do not add more).
 */
-handlerton *ndbclusert_hton;
-handlerton *myisammrg_hton;
 handlerton *heap_hton;
 handlerton *myisam_hton;
+handlerton *partition_hton;
 
 #ifdef WITH_INNOBASE_STORAGE_ENGINE
 extern ulong innobase_fast_shutdown;

sql/partition_info.cc

@@ -445,8 +445,7 @@ bool partition_info::check_engine_mix(handlerton **engine_array, uint no_parts)
   } while (++i < no_parts);
   if (engine_array[0]->flags & HTON_NO_PARTITION)
   {
-    my_error(ER_PARTITION_MERGE_ERROR, MYF(0),
-    engine_array[0] == myisammrg_hton ? "MyISAM Merge" : "CSV");
+    my_error(ER_PARTITION_MERGE_ERROR, MYF(0));
     DBUG_RETURN(TRUE);
   }
   DBUG_RETURN(FALSE);

sql/share/errmsg.txt

@@ -5960,9 +5960,9 @@ ER_EVENT_SET_VAR_ERROR
         eng "Error during starting/stopping of the scheduler. Error code %u"
         ger "Fehler whrend des Startens oder Anhalten des Schedulers. Fehlercode %u"
 ER_PARTITION_MERGE_ERROR
-        eng "%s handler cannot be used in partitioned tables"
-        ger "%s-Handler kann in partitionierten Tabellen nicht verwendet werden"
-        swe "%s kan inte anvndas i en partitionerad tabell"
+        eng "Engine cannot be used in partitioned tables"
+        ger "Engine kann in partitionierten Tabellen nicht verwendet werden"
+        swe "Engine inte anvndas i en partitionerad tabell"
 ER_CANT_ACTIVATE_LOG
         eng "Cannot activate '%-.64s' log"
         ger "Kann Logdatei '%-.64s' nicht aktivieren"

sql/sql_cache.cc

@@ -2389,7 +2389,7 @@ Query_cache::register_tables_from_list(TABLE_LIST *tables_used,
                         tables_used->engine_data))
         DBUG_RETURN(0);
 
-      if (tables_used->table->s->db_type == myisammrg_hton)
+      if (tables_used->table->s->db_type->db_type == DB_TYPE_MRG_MYISAM)
       {
         ha_myisammrg *handler = (ha_myisammrg *) tables_used->table->file;
         MYRG_INFO *file = handler->myrg_info();
@@ -3013,7 +3013,7 @@ static TABLE_COUNTER_TYPE process_and_count_tables(TABLE_LIST *tables_used,
                     "other non-cacheable table(s)"));
         DBUG_RETURN(0);
       }
-      if (tables_used->table->s->db_type == myisammrg_hton)
+      if (tables_used->table->s->db_type->db_type == DB_TYPE_MRG_MYISAM)
       {
         ha_myisammrg *handler = (ha_myisammrg *)tables_used->table->file;
         MYRG_INFO *file = handler->myrg_info();