UNIQUE keys are not anymore shown as PRIMARY KEY

Docs/manual.texi:
  Changelog
mysql-test/r/show_check.result:
  Added test for SHOW CREATE
mysql-test/t/show_check.test:
  Added test for SHOW CREATE
sql/mysqld.cc:
  Fixed messages

Docs/manual.texi

@@ -46425,6 +46425,9 @@ not yet 100% confident in this code.
 Added option @code{--warnings} to @code{mysqld}. Now @code{mysqld}
 only prints the error @code{Aborted connection} if this option is used.
 @item
+Fixed problem with @code{SHOW CREATE TABLE} when you didn't have a
+@code{PRIMARY KEY}.
+@item
 Fixed properly the rename of @code{innodb_unix_file_flush_method} to
 @code{innodb_flush_method}.
 @item

mysql-test/r/show_check.result

@@ -80,3 +80,13 @@ t1	CREATE TABLE `t1` (
   `test_set` set('val1','val2','val3') NOT NULL default '',
   `name` char(20) default 'O''Brien'
 ) TYPE=MyISAM COMMENT='it''s a table'
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL default '0',
+  UNIQUE KEY `aa` (`a`)
+) TYPE=MyISAM
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL default '0',
+  PRIMARY KEY  (`a`)
+) TYPE=MyISAM

mysql-test/t/show_check.test

@@ -65,3 +65,10 @@ create table t1 (
   ) comment = 'it\'s a table' ;
 show create table t1 ;
 drop table t1;
+
+create table t1 (a int not null, unique aa (a));
+show create table t1;
+drop table t1;
+create table t1 (a int not null, primary key (a));
+show create table t1;
+drop table t1;

sql/mysqld.cc

@@ -1190,7 +1190,7 @@ Some pointers may be invalid and cause the dump to abort...\n");
     fprintf(stderr, "\n
 Successfully dumped variables, if you ran with --log, take a look at the\n\
 details of what thread %ld did to cause the crash.  In some cases of really\n\
-bad corruption, the above values may be invalid\n\n",
+bad corruption, the values shown above may be invalid\n\n",
 	  thd->thread_id);
   }
   fprintf(stderr, "\
@@ -3011,6 +3011,8 @@ static void usage(void)
 			Start without grant tables. This gives all users\n\
 			FULL ACCESS to all tables!\n\
   --safe-mode		Skip some optimize stages (for testing)\n\
+  --safe-show-database  Don't show databases for which the user has no\n\
+                        privileges\n\
   --skip-concurrent-insert\n\
 		        Don't use concurrent insert with MyISAM\n\
   --skip-delay-key-write\n\

sql/sql_show.cc

@@ -839,18 +839,22 @@ store_create_info(THD *thd, TABLE *table, String *packet)
 
   for (uint i=0 ; i < table->keys ; i++,key_info++)
   {
+    KEY_PART_INFO *key_part= key_info->key_part;
+    bool found_primary=0;
     packet->append(",\n  ", 4);
 
-    KEY_PART_INFO *key_part= key_info->key_part;
-    if (i == primary_key)
+    if (i == primary_key && !strcmp(key_info->name,"PRIMARY"))
+    {
+      found_primary=1;
       packet->append("PRIMARY ", 8);
+    }
     else if (key_info->flags & HA_NOSAME)
       packet->append("UNIQUE ", 7);
     else if (key_info->flags & HA_FULLTEXT)
       packet->append("FULLTEXT ", 9);
     packet->append("KEY ", 4);
 
-    if (i != primary_key)
+    if (!found_primary)
      append_identifier(thd,packet,key_info->name);
 
     packet->append(" (", 2);