branches/zip:

Add InnoDB version in these places:
 
* In INFORMATION_SCHEMA.PLUGINS.PLUGIN_VERSION, only 1.2 out of 1.2.3
  because MySQL supports only one dot there
 
* At startup:
  "080501 12:28:06 InnoDB Plugin 1.0.1 started; log sequence number 46509"

* In a server variable innodb_version;
  mysql> select @@innodb_version;
  +------------------+
  | @@innodb_version |
  +------------------+
  | 1.0.1            |
  +------------------+

Approved by:	Sunny

handler/ha_innodb.cc

@@ -182,6 +182,8 @@ static my_bool	innobase_adaptive_hash_index		= TRUE;
 
 static char*	internal_innobase_data_file_path	= NULL;
 
+static char*	innodb_version_str = (char*) INNODB_VERSION_STR;
+
 /* The following counter is used to convey information to InnoDB
 about server activity: in selects it is not sensible to call
 srv_active_wake_master_thread after each fetch or search, we only do
@@ -9077,6 +9079,10 @@ static MYSQL_SYSVAR_LONG(autoinc_lock_mode, innobase_autoinc_lock_mode,
   AUTOINC_OLD_STYLE_LOCKING,	/* Minimum value */
   AUTOINC_NO_LOCKING, 0);	/* Maximum value */
 
+static MYSQL_SYSVAR_STR(version, innodb_version_str,
+  PLUGIN_VAR_NOCMDOPT | PLUGIN_VAR_READONLY,
+  "InnoDB version", NULL, NULL, INNODB_VERSION_STR);
+
 static struct st_mysql_sys_var* innobase_system_variables[]= {
   MYSQL_SYSVAR(additional_mem_pool_size),
   MYSQL_SYSVAR(autoextend_increment),
@@ -9120,6 +9126,7 @@ static struct st_mysql_sys_var* innobase_system_variables[]= {
   MYSQL_SYSVAR(thread_concurrency),
   MYSQL_SYSVAR(thread_sleep_delay),
   MYSQL_SYSVAR(autoinc_lock_mode),
+  MYSQL_SYSVAR(version),
   NULL
 };
 
@@ -9255,7 +9262,7 @@ mysql_declare_plugin(innobase)
   PLUGIN_LICENSE_GPL,
   innobase_init, /* Plugin Init */
   NULL, /* Plugin Deinit */
-  0x0100 /* 1.0 */,
+  INNODB_VERSION_SHORT,
   innodb_status_variables_export,/* status variables             */
   innobase_system_variables, /* system variables */
   NULL /* reserved */

handler/i_s.cc

@@ -423,7 +423,7 @@ UNIV_INTERN struct st_mysql_plugin	i_s_innodb_trx =
 
 	/* plugin version (for SHOW PLUGINS) */
 	/* unsigned int */
-	STRUCT_FLD(version, 0x0100 /* 1.0 */),
+	STRUCT_FLD(version, INNODB_VERSION_SHORT),
 
 	/* struct st_mysql_show_var* */
 	STRUCT_FLD(status_vars, NULL),
@@ -698,7 +698,7 @@ UNIV_INTERN struct st_mysql_plugin	i_s_innodb_locks =
 
 	/* plugin version (for SHOW PLUGINS) */
 	/* unsigned int */
-	STRUCT_FLD(version, 0x0100 /* 1.0 */),
+	STRUCT_FLD(version, INNODB_VERSION_SHORT),
 
 	/* struct st_mysql_show_var* */
 	STRUCT_FLD(status_vars, NULL),
@@ -881,7 +881,7 @@ UNIV_INTERN struct st_mysql_plugin	i_s_innodb_lock_waits =
 
 	/* plugin version (for SHOW PLUGINS) */
 	/* unsigned int */
-	STRUCT_FLD(version, 0x0100 /* 1.0 */),
+	STRUCT_FLD(version, INNODB_VERSION_SHORT),
 
 	/* struct st_mysql_show_var* */
 	STRUCT_FLD(status_vars, NULL),
@@ -1213,7 +1213,7 @@ UNIV_INTERN struct st_mysql_plugin	i_s_innodb_cmp =
 
 	/* plugin version (for SHOW PLUGINS) */
 	/* unsigned int */
-	STRUCT_FLD(version, 0x0100 /* 1.0 */),
+	STRUCT_FLD(version, INNODB_VERSION_SHORT),
 
 	/* struct st_mysql_show_var* */
 	STRUCT_FLD(status_vars, NULL),
@@ -1263,7 +1263,7 @@ UNIV_INTERN struct st_mysql_plugin	i_s_innodb_cmp_reset =
 
 	/* plugin version (for SHOW PLUGINS) */
 	/* unsigned int */
-	STRUCT_FLD(version, 0x0100 /* 1.0 */),
+	STRUCT_FLD(version, INNODB_VERSION_SHORT),
 
 	/* struct st_mysql_show_var* */
 	STRUCT_FLD(status_vars, NULL),
@@ -1479,7 +1479,7 @@ UNIV_INTERN struct st_mysql_plugin	i_s_innodb_cmpmem =
 
 	/* plugin version (for SHOW PLUGINS) */
 	/* unsigned int */
-	STRUCT_FLD(version, 0x0100 /* 1.0 */),
+	STRUCT_FLD(version, INNODB_VERSION_SHORT),
 
 	/* struct st_mysql_show_var* */
 	STRUCT_FLD(status_vars, NULL),
@@ -1529,7 +1529,7 @@ UNIV_INTERN struct st_mysql_plugin	i_s_innodb_cmpmem_reset =
 
 	/* plugin version (for SHOW PLUGINS) */
 	/* unsigned int */
-	STRUCT_FLD(version, 0x0100 /* 1.0 */),
+	STRUCT_FLD(version, INNODB_VERSION_SHORT),
 
 	/* struct st_mysql_show_var* */
 	STRUCT_FLD(status_vars, NULL),

include/univ.i

@@ -9,6 +9,28 @@ Created 1/20/1994 Heikki Tuuri
 #ifndef univ_i
 #define univ_i
 
+#define INNODB_VERSION_MAJOR	1
+#define INNODB_VERSION_MINOR	0
+#define INNODB_VERSION_BUGFIX	1
+
+/* The following is the InnoDB version as shown in
+SELECT plugin_version FROM information_schema.plugins;
+calculated in in make_version_string() in sql/sql_show.cc like this:
+"version >> 8" . "version & 0xff"
+because the version is shown with only one dot, we skip the last
+component, i.e. we show M.N.P as M.N */
+#define INNODB_VERSION_SHORT	\
+	(INNODB_VERSION_MAJOR << 8 | INNODB_VERSION_MINOR)
+
+/* auxiliary macros to help creating the version as string */
+#define __INNODB_VERSION(a, b, c)	(#a "." #b "." #c)
+#define _INNODB_VERSION(a, b, c)	__INNODB_VERSION(a, b, c)
+
+#define INNODB_VERSION_STR			\
+	_INNODB_VERSION(INNODB_VERSION_MAJOR,	\
+			INNODB_VERSION_MINOR,	\
+			INNODB_VERSION_BUGFIX)
+
 #ifdef MYSQL_DYNAMIC_PLUGIN
 /* In the dynamic plugin, redefine some externally visible symbols
 in order not to conflict with the symbols of a builtin InnoDB. */

srv/srv0start.c

@@ -1662,8 +1662,9 @@ innobase_start_or_create_for_mysql(void)
 	if (srv_print_verbose_log) {
 		ut_print_timestamp(stderr);
 		fprintf(stderr,
-			"  InnoDB: Started; log sequence number %llu\n",
-			srv_start_lsn);
+			" InnoDB Plugin %s started; "
+			"log sequence number %llu\n",
+			INNODB_VERSION_STR, srv_start_lsn);
 	}
 
 	if (srv_force_recovery > 0) {