put status variables in the proper pluginname_ scope

(but support the scopeless mysql style too).
always output status/system variables in the correct lettercase

mysql-test/r/plugin.result

@@ -44,7 +44,7 @@ set global example_ulong_var=500;
 set global example_enum_var= e1;
 show status like 'example%';
 Variable_name	Value
-example_func_example	enum_var is 0, ulong_var is 500, really
+Example_func_example	enum_var is 0, ulong_var is 500, really
 show variables like 'example%';
 Variable_name	Value
 example_enum_var	e1

mysql-test/suite/plugins/r/audit_null.result

@@ -9,8 +9,8 @@ ERROR 42S22: Unknown column 'foobar' in 'field list'
 show status like 'audit_null%';
 Variable_name	Value
 Audit_null_called	9
-Audit_null_general_error	1
 Audit_null_general_log	3
+Audit_null_general_error	1
 Audit_null_general_result	2
 create procedure au1(x char(16)) select concat("test1", x);
 call au1("-12");
@@ -19,8 +19,8 @@ test1-12
 show status like 'audit_null%';
 Variable_name	Value
 Audit_null_called	19
-Audit_null_general_error	1
 Audit_null_general_log	7
+Audit_null_general_error	1
 Audit_null_general_result	5
 uninstall plugin audit_null;
 Warnings:

plugin/audit_null/audit_null.c

@@ -127,12 +127,10 @@ static struct st_mysql_audit audit_null_descriptor=
 
 static struct st_mysql_show_var simple_status[]=
 {
-  { "Audit_null_called", (char *) &number_of_calls, SHOW_INT },
-  { "Audit_null_general_log", (char *) &number_of_calls_general_log, SHOW_INT },
-  { "Audit_null_general_error", (char *) &number_of_calls_general_error,
-    SHOW_INT },
-  { "Audit_null_general_result", (char *) &number_of_calls_general_result,
-    SHOW_INT },
+  { "called", (char *) &number_of_calls, SHOW_INT },
+  { "general_log", (char *) &number_of_calls_general_log, SHOW_INT },
+  { "general_error", (char *) &number_of_calls_general_error, SHOW_INT },
+  { "general_result", (char *) &number_of_calls_general_result, SHOW_INT },
   { 0, 0, 0}
 };
 

plugin/auth_socket/auth_socket.c

@@ -85,23 +85,6 @@ static struct st_mysql_auth socket_auth_handler=
   socket_auth
 };
 
-mysql_declare_plugin(socket_auth)
-{
-  MYSQL_AUTHENTICATION_PLUGIN,
-  &socket_auth_handler,
-  "unix_socket",
-  "Sergei Golubchik",
-  "Unix Socket based authentication",
-  PLUGIN_LICENSE_GPL,
-  NULL,
-  NULL,
-  0x0100,
-  NULL,
-  NULL,
-  NULL,
-  0,
-}
-mysql_declare_plugin_end;
 maria_declare_plugin(socket_auth)
 {
   MYSQL_AUTHENTICATION_PLUGIN,

plugin/daemon_example/daemon_example.cc

@@ -188,23 +188,6 @@ struct st_mysql_daemon daemon_example_plugin=
   Plugin library descriptor
 */
 
-mysql_declare_plugin(daemon_example)
-{
-  MYSQL_DAEMON_PLUGIN,
-  &daemon_example_plugin,
-  "daemon_example",
-  "Brian Aker",
-  "Daemon example, creates a heartbeat beat file in mysql-heartbeat.log",
-  PLUGIN_LICENSE_GPL,
-  daemon_example_plugin_init, /* Plugin Init */
-  daemon_example_plugin_deinit, /* Plugin Deinit */
-  0x0100 /* 1.0 */,
-  NULL,                       /* status variables                */
-  NULL,                       /* system variables                */
-  NULL,                       /* config options                  */
-  0,                          /* flags                           */
-}
-mysql_declare_plugin_end;
 maria_declare_plugin(daemon_example)
 {
   MYSQL_DAEMON_PLUGIN,

plugin/fulltext/plugin_example.c

@@ -254,24 +254,6 @@ static struct st_mysql_sys_var* simple_system_variables[]= {
   Plugin library descriptor
 */
 
-mysql_declare_plugin(ftexample)
-{
-  MYSQL_FTPARSER_PLUGIN,      /* type                            */
-  &simple_parser_descriptor,  /* descriptor                      */
-  "simple_parser",            /* name                            */
-  "Sergei Golubchik",         /* author                          */
-  "Simple Full-Text Parser",  /* description                     */
-  PLUGIN_LICENSE_GPL,
-  simple_parser_plugin_init,  /* init function (when loaded)     */
-  simple_parser_plugin_deinit,/* deinit function (when unloaded) */
-  0x0001,                     /* version                         */
-  simple_status,              /* status variables                */
-  simple_system_variables,    /* system variables                */
-  NULL,
-  0,
-}
-mysql_declare_plugin_end;
-
 maria_declare_plugin(ftexample)
 {
   MYSQL_FTPARSER_PLUGIN,      /* type                            */

plugin/sql_errlog/sql_errlog.c

@@ -144,24 +144,6 @@ static struct st_mysql_audit descriptor =
   { MYSQL_AUDIT_GENERAL_CLASSMASK }
 };
 
-mysql_declare_plugin(sql_errlog)
-{
-  MYSQL_AUDIT_PLUGIN,
-  &descriptor,
-  "SQL_ERROR_LOG",
-  "Alexey Botchkov",
-  "Log SQL level errors to a file with rotation",
-  PLUGIN_LICENSE_GPL,
-  sql_error_log_init,
-  sql_error_log_deinit,
-  0x0100,
-  NULL,
-  vars,
-  NULL,
-  0
-}
-mysql_declare_plugin_end;
-
 maria_declare_plugin(sql_errlog)
 {
   MYSQL_AUDIT_PLUGIN,

sql/sql_plugin.cc

@@ -1133,22 +1133,21 @@ static void plugin_deinitialize(struct st_plugin_int *plugin, bool ref_check)
 
   if (plugin->plugin->status_vars)
   {
-#ifdef FIX_LATER
-    /**
-      @todo
-      unfortunately, status variables were introduced without a
-      pluginname_ namespace, that is pluginname_ was not added automatically
-      to status variable names. It should be fixed together with the next
-      incompatible API change.
+    /*
+      historical ndb behavior caused MySQL plugins to specify
+      status var names in full, with the plugin name prefix.
+      this was never fixed in MySQL.
+      MariaDB fixes that but support MySQL style too.
     */
-    SHOW_VAR array[2]= {
+    SHOW_VAR *show_vars= plugin->plugin->status_vars;
+    SHOW_VAR tmp_array[2]= {
       {plugin->plugin->name, (char*)plugin->plugin->status_vars, SHOW_ARRAY},
       {0, 0, SHOW_UNDEF}
     };
-    remove_status_vars(array);
-#else
-    remove_status_vars(plugin->plugin->status_vars);
-#endif /* FIX_LATER */
+    if (strncasecmp(show_vars->name, plugin->name.str, plugin->name.length))
+      show_vars= tmp_array;
+
+    remove_status_vars(show_vars);
   }
 
   if (plugin_type_deinitialize[plugin->plugin->type])
@@ -1358,24 +1357,22 @@ static int plugin_initialize(struct st_plugin_int *plugin)
 
   if (plugin->plugin->status_vars)
   {
-#ifdef FIX_LATER
     /*
-      We have a problem right now where we can not prepend without
-      breaking backwards compatibility. We will fix this shortly so
-      that engines have "use names" and we wil use those for
-      CREATE TABLE, and use the plugin name then for adding automatic
-      variable names.
+      historical ndb behavior caused MySQL plugins to specify
+      status var names in full, with the plugin name prefix.
+      this was never fixed in MySQL.
+      MariaDB fixes that, but supports MySQL style too.
     */
-    SHOW_VAR array[2]= {
+    SHOW_VAR *show_vars= plugin->plugin->status_vars;
+    SHOW_VAR tmp_array[2]= {
       {plugin->plugin->name, (char*)plugin->plugin->status_vars, SHOW_ARRAY},
       {0, 0, SHOW_UNDEF}
     };
-    if (add_status_vars(array)) // add_status_vars makes a copy
-      goto err;
-#else
-    if (add_status_vars(plugin->plugin->status_vars))
+    if (strncasecmp(show_vars->name, plugin->name.str, plugin->name.length))
+      show_vars= tmp_array;
+
+    if (add_status_vars(show_vars))
       goto err;
-#endif /* FIX_LATER */
   }
 
   /*

sql/sql_show.cc

@@ -2626,7 +2626,7 @@ static bool status_vars_inited= 0;
 C_MODE_START
 static int show_var_cmp(const void *var1, const void *var2)
 {
-  return strcmp(((SHOW_VAR*)var1)->name, ((SHOW_VAR*)var2)->name);
+  return strcasecmp(((SHOW_VAR*)var1)->name, ((SHOW_VAR*)var2)->name);
 }
 C_MODE_END
 
@@ -2831,6 +2831,17 @@ static bool show_status_array(THD *thd, const char *wild,
     name_buffer[sizeof(name_buffer)-1]=0;       /* Safety */
     if (ucase_names)
       my_caseup_str(system_charset_info, name_buffer);
+    else
+    {
+      my_casedn_str(system_charset_info, name_buffer);
+      DBUG_ASSERT(name_buffer[0] >= 'a');
+      DBUG_ASSERT(name_buffer[0] <= 'z');
+
+      /* traditionally status variables have a first letter uppercased */
+      if (status_var)
+        name_buffer[0]-= 'a' - 'A';
+    }
+
 
     restore_record(table, s->default_values);
     table->field[0]->store(name_buffer, strlen(name_buffer),

storage/cassandra/ha_cassandra.cc

@@ -2568,21 +2568,21 @@ struct st_mysql_storage_engine cassandra_storage_engine=
 { MYSQL_HANDLERTON_INTERFACE_VERSION };
 
 static SHOW_VAR cassandra_status_variables[]= {
-  {"Cassandra_row_inserts",
+  {"row_inserts",
     (char*) &cassandra_counters.row_inserts,         SHOW_LONG},
-  {"Cassandra_row_insert_batches",
+  {"row_insert_batches",
     (char*) &cassandra_counters.row_insert_batches,  SHOW_LONG},
 
-  {"Cassandra_multiget_keys_scanned",
+  {"multiget_keys_scanned",
     (char*) &cassandra_counters.multiget_keys_scanned, SHOW_LONG},
-  {"Cassandra_multiget_reads",
+  {"multiget_reads",
     (char*) &cassandra_counters.multiget_reads,      SHOW_LONG},
-  {"Cassandra_multiget_rows_read",
+  {"multiget_rows_read",
     (char*) &cassandra_counters.multiget_rows_read,  SHOW_LONG},
 
-  {"Cassandra_timeout_exceptions",
+  {"timeout_exceptions",
     (char*) &cassandra_counters.timeout_exceptions, SHOW_LONG},
-  {"Cassandra_unavailable_exceptions",
+  {"unavailable_exceptions",
     (char*) &cassandra_counters.unavailable_exceptions, SHOW_LONG},
   {NullS, NullS, SHOW_LONG}
 };

storage/example/ha_example.cc

@@ -1117,7 +1117,7 @@ static int show_func_example(MYSQL_THD thd, struct st_mysql_show_var *var,
 
 static struct st_mysql_show_var func_status[]=
 {
-  {"example_func_example",  (char *)show_func_example, SHOW_SIMPLE_FUNC},
+  {"func_example",  (char *)show_func_example, SHOW_SIMPLE_FUNC},
   {0,0,SHOW_UNDEF}
 };
 

storage/maria/ha_maria.cc

@@ -3753,11 +3753,6 @@ SHOW_VAR status_variables[]= {
   {NullS, NullS, SHOW_LONG}
 };
 
-static struct st_mysql_show_var aria_status_variables[]= {
-  {"Aria", (char*) &status_variables, SHOW_ARRAY},
-  {NullS, NullS, SHOW_LONG}
-};
-
 /****************************************************************************
  * Maria MRR implementation: use DS-MRR
  ***************************************************************************/
@@ -3832,7 +3827,7 @@ maria_declare_plugin(aria)
   ha_maria_init,                /* Plugin Init      */
   NULL,                         /* Plugin Deinit    */
   0x0105,                       /* 1.5              */
-  aria_status_variables,        /* status variables */
+  status_variables,             /* status variables */
   system_variables,             /* system variables */
   "1.5",                        /* string version   */
   MariaDB_PLUGIN_MATURITY_GAMMA /* maturity         */