Cleanup for handlerton structure to allow for loadable engine work. This is...

Cleanup for handlerton structure to allow for loadable engine work. This is the first in a series of patches. 


sql/examples/ha_archive.cc:
  Now declared externally.
sql/examples/ha_example.cc:
  Now declared externally
sql/examples/ha_tina.cc:
  Now declared externally
sql/ha_berkeley.cc:
  Now declared externally
sql/ha_blackhole.cc:
  Now declared externally
sql/ha_federated.cc:
  Now declared externally.
sql/ha_heap.cc:
  Now declared externally.
sql/ha_innodb.cc:
  Now declared externally.
sql/ha_myisam.cc:
  Now declared externally
sql/ha_myisammrg.cc:
  Now declared externally.
sql/ha_ndbcluster.cc:
  Now declared externally.
sql/handler.cc:
  Changes for eventual loadable engines. This will allow us to gain faster access to the handlerton (eventually this will just be a handlteron array).
sql/handler.h:
  New alias structure and change to show_table_st to place handlerton in the structure.

sql/examples/ha_archive.cc

@@ -136,7 +136,7 @@ static HASH archive_open_tables;
 #define ARCHIVE_CHECK_HEADER 254 // The number we use to determine corruption
 
 /* dummy handlerton - only to have something to return from archive_db_init */
-static handlerton archive_hton = {
+handlerton archive_hton = {
   "archive",
   0,       /* slot */
   0,       /* savepoint size. */

sql/examples/ha_example.cc

@@ -73,7 +73,7 @@
 #include "ha_example.h"
 
 
-static handlerton example_hton= {
+handlerton example_hton= {
   "CSV",
   0,       /* slot */
   0,       /* savepoint size. */

sql/examples/ha_tina.cc

@@ -54,7 +54,7 @@ pthread_mutex_t tina_mutex;
 static HASH tina_open_tables;
 static int tina_init= 0;
 
-static handlerton tina_hton= {
+handlerton tina_hton= {
   "CSV",
   0,       /* slot */
   0,       /* savepoint size. */

sql/ha_berkeley.cc

@@ -107,7 +107,7 @@ static int berkeley_close_connection(THD *thd);
 static int berkeley_commit(THD *thd, bool all);
 static int berkeley_rollback(THD *thd, bool all);
 
-static handlerton berkeley_hton = {
+handlerton berkeley_hton = {
   "BerkeleyDB",
   0, /* slot */
   0, /* savepoint size */

sql/ha_blackhole.cc

@@ -26,7 +26,7 @@
 
 /* Blackhole storage engine handlerton */
 
-static handlerton blackhole_hton= {
+handlerton blackhole_hton= {
   "BLACKHOLE",
   0,       /* slot */
   0,       /* savepoint size. */

sql/ha_federated.cc

@@ -690,7 +690,7 @@ static int parse_url(FEDERATED_SHARE *share, TABLE *table,
 
 /* Federated storage engine handlerton */
 
-static handlerton federated_hton= {
+handlerton federated_hton= {
   "FEDERATED",
   0,       /* slot */
   0,       /* savepoint size. */

sql/ha_heap.cc

@@ -23,7 +23,7 @@
 #include <myisampack.h>
 #include "ha_heap.h"
 
-static handlerton heap_hton= {
+handlerton heap_hton= {
   "MEMORY",
   0,       /* slot */
   0,       /* savepoint size. */

sql/ha_innodb.cc

@@ -206,7 +206,7 @@ static int innobase_rollback_to_savepoint(THD* thd, void *savepoint);
 static int innobase_savepoint(THD* thd, void *savepoint);
 static int innobase_release_savepoint(THD* thd, void *savepoint);
 
-static handlerton innobase_hton = {
+handlerton innobase_hton = {
   "InnoDB",
   0,				/* slot */
   sizeof(trx_named_savept_t),	/* savepoint size. TODO: use it */

sql/ha_myisam.cc

@@ -46,7 +46,7 @@ TYPELIB myisam_recover_typelib= {array_elements(myisam_recover_names)-1,"",
 
 /* MyISAM handlerton */
 
-static handlerton myisam_hton= {
+handlerton myisam_hton= {
   "MyISAM",
   0,       /* slot */
   0,       /* savepoint size. */

sql/ha_myisammrg.cc

@@ -34,8 +34,8 @@
 
 /* MyISAM MERGE handlerton */
 
-static handlerton myisammrg_hton= {
-  "MRG_MyISAM",
+handlerton myisammrg_hton= {
+  "MRG_MYISAM",
   0,       /* slot */
   0,       /* savepoint size. */
   NULL,    /* close_connection */

sql/ha_ndbcluster.cc

@@ -49,7 +49,7 @@ static int ndbcluster_close_connection(THD *thd);
 static int ndbcluster_commit(THD *thd, bool all);
 static int ndbcluster_rollback(THD *thd, bool all);
 
-static handlerton ndbcluster_hton = {
+handlerton ndbcluster_hton = {
   "ndbcluster",
   0, /* slot */
   0, /* savepoint size */

sql/handler.h

@@ -177,13 +177,6 @@ enum db_type
   DB_TYPE_DEFAULT // Must be last
 };
 
-struct show_table_type_st {
-  const char *type;
-  SHOW_COMP_OPTION *value;
-  const char *comment;
-  enum db_type db_type;
-};
-
 enum row_type { ROW_TYPE_NOT_USED=-1, ROW_TYPE_DEFAULT, ROW_TYPE_FIXED,
 		ROW_TYPE_DYNAMIC, ROW_TYPE_COMPRESSED,
 		ROW_TYPE_REDUNDANT, ROW_TYPE_COMPACT };
@@ -363,6 +356,20 @@ typedef struct
    uint32 flags;                                /* global handler flags */
 } handlerton;
 
+struct show_table_type_st {
+  const char *type;
+  SHOW_COMP_OPTION *value;
+  const char *comment;
+  enum db_type db_type;
+  handlerton *ht;
+};
+
+struct show_table_alias_st {
+  const char *alias;
+  const char *type;
+  show_table_type_st *st;
+};
+
 /* Possible flags of a handlerton */
 #define HTON_NO_FLAGS 0
 #define HTON_CLOSE_CURSORS_AT_COMMIT 1