4 small items in this:

- when we don't have in_addr_t, use uint32.
- a forgotten initialization of slave_proxy_id in sql/log_event.cc (was not really "forgot", was
"we needn't init it there", but there was one case where we needed...).
- made slave_proxy_id always meaningful in THD and Log_event, so we can
rely more on it (no need to test if it's meaningful). THD::slave_proxy_id
is equal to THD::thread_id except for the slave SQL thread.
- clean up the slave's temporary table (i.e. free their memory) when slave
server shuts down.


extra/resolveip.c:
  removed #define as it is simpler to put it in my_net.h
  (because we need the #define elsewhere)
include/my_net.h:
  When in_addr_t is not defined, use uint32.
libmysql/libmysql.c:
  using in_addr_t is more generic.
libmysql/manager.c:
  using in_addr_t is more generic.
mysql-test/t/rpl_chain_temp_table.test:
  comments
sql/log_event.cc:
  * Had forgot to initialize slave_proxy_id in the event constructor (char* buf...).
  Initializing is in fact only needed for Create_file_log_event, because
  it uses slave_proxy_id even if it does not write an event to the binlog
  (it uses slave_proxy_id to write it to SQL-LOAD.info).
  * When we write events we now always write slave_proxy_id, which is now always
  meaningful (as thd->slave_proxy_id is now always meaningful, see change in
  sql_class.cc).
sql/mini_client.cc:
  in_addr_t is more generic.
sql/slave.cc:
  A RELAY_LOG_INFO method to free the slave's temporary tables from memory
  at slave's server shutdown.
  It is called by end_slave(), which is called by close_connections(),
  which is called when the server terminates
  (close_connections() is just before clean_up(); putting the call in 
  clean_up() was buggy, as active_mi is already deleted by close_connections().
sql/slave.h:
  new method
sql/sql_class.cc:
  By default we set THD::slave_proxy_id to THD::thread_id,
  so THD::slave_proxy_id is always meaningful (not 0).
  It's always the same as the thread id except for the slave
  SQL thread.

extra/resolveip.c

@@ -36,10 +36,6 @@
 extern int h_errno;
 #endif
 
-#ifndef HAVE_IN_ADDR_T
-#define in_addr_t ulong
-#endif
-
 static my_bool silent;
 
 static struct my_option my_long_options[] =

include/my_net.h

@@ -63,6 +63,15 @@ C_MODE_START
 #define O_NONBLOCK 1    /* For emulation of fcntl() */
 #endif
 
+/*
+  On OSes which don't have the in_addr_t, we guess that using uint32 is the best
+  possible choice. We guess this from the fact that on HP-UX64bit & FreeBSD64bit
+  & Solaris64bit, in_addr_t is equivalent to uint32. And on Linux32bit too.
+*/
+#ifndef HAVE_IN_ADDR_T
+#define in_addr_t uint32
+#endif
+
 /* Thread safe or portable version of some functions */
 
 void my_inet_ntoa(struct in_addr in, char *buf);

libmysql/libmysql.c

@@ -1623,7 +1623,7 @@ mysql_real_connect(MYSQL *mysql,const char *host, const char *user,
   char		buff[NAME_LEN+USERNAME_LENGTH+100],charset_name_buff[16];
   char		*end,*host_info,*charset_name;
   my_socket	sock;
-  uint32	ip_addr;
+  in_addr_t	ip_addr;
   struct	sockaddr_in sock_addr;
   ulong		pkt_length;
   NET		*net= &mysql->net;

libmysql/manager.c

@@ -90,7 +90,7 @@ MYSQL_MANAGER*  STDCALL mysql_manager_connect(MYSQL_MANAGER* con,
 {
   my_socket sock;
   struct sockaddr_in sock_addr;
-  uint32 ip_addr;
+  in_addr_t ip_addr;
   char msg_buf[MAX_MYSQL_MANAGER_MSG];
   int msg_len;
   Vio* vio;

mysql-test/t/rpl_chain_temp_table.test

@@ -3,6 +3,7 @@
 # stop/restart servers. Note that if assumptions are wrong, the test will not
 # fail; it will just fail to test the error-prone scenario.
 # Using the manager is the only way to have more than one slave server.
+# So you must run this test with --manager.
 
 require_manager;
 server_stop master;
@@ -87,3 +88,12 @@ drop table t2;
 save_master_pos;
 connection slave_sec;
 sync_with_master;
+
+# On purpose, we don't delete the temporary tables explicitely.
+# So temp tables remain on slave (remember they are not deleted when the slave
+# SQL thread terminates). If you run this test with 
+# --valgrind --valgrind-options=--show-reachable=yes 
+# you will see if they get cleaned up at slave's shutdown (that is, if the
+# memory they use is freed (it should) by mysqld before it terminates).
+# If they wouldn't be cleaned up, you would see some "still reachable" blocks in
+# Valgrind.

sql/log_event.cc

@@ -874,7 +874,7 @@ Query_log_event::Query_log_event(const char* buf, int event_len,
     return;
 
   memcpy(data_buf, buf + Q_DATA_OFFSET, data_len);
-  thread_id = uint4korr(buf + Q_THREAD_ID_OFFSET);
+  slave_proxy_id= thread_id= uint4korr(buf + Q_THREAD_ID_OFFSET);
   db = data_buf;
   db_len = (uint)buf[Q_DB_LEN_OFFSET];
   query=data_buf + db_len + 1;
@@ -955,8 +955,7 @@ int Query_log_event::write_data(IO_CACHE* file)
     SET PSEUDO_THREAD_ID=
     for each query using temp tables.
   */
-  int4store(buf + Q_THREAD_ID_OFFSET, (slave_proxy_id ? slave_proxy_id :
-                                       thread_id));
+  int4store(buf + Q_THREAD_ID_OFFSET, slave_proxy_id);
   int4store(buf + Q_EXEC_TIME_OFFSET, exec_time);
   buf[Q_DB_LEN_OFFSET] = (char) db_len;
   int2store(buf + Q_ERR_CODE_OFFSET, error_code);
@@ -1057,8 +1056,7 @@ void Rand_log_event::print(FILE* file, bool short_form, char* last_db)
 int Load_log_event::write_data_header(IO_CACHE* file)
 {
   char buf[LOAD_HEADER_LEN];
-  int4store(buf + L_THREAD_ID_OFFSET, (slave_proxy_id ? slave_proxy_id :
-                                       thread_id));
+  int4store(buf + L_THREAD_ID_OFFSET, slave_proxy_id);
   int4store(buf + L_EXEC_TIME_OFFSET, exec_time);
   int4store(buf + L_SKIP_LINES_OFFSET, skip_lines);
   buf[L_TBL_LEN_OFFSET] = (char)table_name_len;
@@ -1276,7 +1274,7 @@ int Load_log_event::copy_log_event(const char *buf, ulong event_len,
   char* buf_end = (char*)buf + event_len;
   uint header_len= old_format ? OLD_HEADER_LEN : LOG_EVENT_HEADER_LEN;
   const char* data_head = buf + header_len;
-  thread_id = uint4korr(data_head + L_THREAD_ID_OFFSET);
+  slave_proxy_id= thread_id= uint4korr(data_head + L_THREAD_ID_OFFSET);
   exec_time = uint4korr(data_head + L_EXEC_TIME_OFFSET);
   skip_lines = uint4korr(data_head + L_SKIP_LINES_OFFSET);
   table_name_len = (uint)data_head[L_TBL_LEN_OFFSET];

sql/mini_client.cc

@@ -547,7 +547,7 @@ mc_mysql_connect(MYSQL *mysql,const char *host, const char *user,
 {
   char		buff[NAME_LEN+USERNAME_LENGTH+100],*end,*host_info;
   my_socket	sock;
-  uint32	ip_addr;
+  in_addr_t	ip_addr;
   struct	sockaddr_in sock_addr;
   ulong		pkt_length;
   NET		*net= &mysql->net;

sql/slave.cc

@@ -324,6 +324,20 @@ void init_slave_skip_errors(const char* arg)
   }
 }
 
+void st_relay_log_info::close_temporary_tables()
+{
+  TABLE *table,*next;
+
+  for (table=save_temporary_tables ; table ; table=next)
+  {
+    next=table->next;
+    /*
+      Don't ask for disk deletion. For now, anyway they will be deleted when
+      slave restarts, but it is a better intention to not delete them.
+    */
+    close_temporary(table, 0);
+  }
+}
 
 /*
   We assume we have a run lock on rli and that both slave thread
@@ -790,6 +804,7 @@ static int end_slave_on_walk(MASTER_INFO* mi, gptr /*unused*/)
 
 void end_slave()
 {
+  /* This is called when the server terminates, in close_connections(). */
   if (active_mi)
   {
     /*
@@ -3092,6 +3107,12 @@ void end_relay_log_info(RELAY_LOG_INFO* rli)
   }
   rli->inited = 0;
   rli->relay_log.close(LOG_CLOSE_INDEX | LOG_CLOSE_STOP_EVENT);
+  /*
+    Delete the slave's temporary tables from memory.
+    In the future there will be other actions than this, to ensure persistance
+    of slave's temp tables after shutdown.
+  */
+  rli->close_temporary_tables();
   DBUG_VOID_RETURN;
 }
 

sql/slave.h

@@ -239,6 +239,7 @@ typedef struct st_relay_log_info
 
   int wait_for_pos(THD* thd, String* log_name, longlong log_pos, 
 		   longlong timeout);
+  void st_relay_log_info::close_temporary_tables();
 } RELAY_LOG_INFO;
 
 

sql/sql_class.cc

@@ -323,6 +323,11 @@ bool THD::store_globals()
     return 1;
   mysys_var=my_thread_var;
   dbug_thread_id=my_thread_id();
+  /*
+    By default 'slave_proxy_id' is 'thread_id'. They may later become different
+    if this is the slave SQL thread.
+  */
+  slave_proxy_id= thread_id;
   return 0;
 }