Fixes for IO_CACHE

Docs/manual.texi

@@ -148,7 +148,8 @@ version see the relevant distribution.
 * Function Index::              SQL command, type and function index
 * Concept Index::               Concept Index
 
-@detailmenu --- The Detailed Node Listing ---
+@detailmenu
+ --- The Detailed Node Listing ---
 
 General Information About MySQL
 
@@ -592,7 +593,7 @@ Speed of queries that access or update data
 MySQL Utilites
 
 * Programs::                    What do the executables do?
-* safe_mysqld::                 safe_mysqld, the wrapper around mysqld
+* safe_mysqld::                 
 * mysql::                       The command line tool
 * mysqladmin::                  Administering a @strong{MySQL} server
 * mysqldump::                   Dumping the structure and data from @strong{MySQL} databases and tables
@@ -947,6 +948,7 @@ Changes in release 3.19.x
 
 MySQL and the future (The TODO)
 
+* TODO MySQL 4.0::              
 * TODO future::                 Things that must done in the very near future
 * TODO sometime::               Things that have to be done sometime
 * TODO unplanned::              Some things we don't have any plans to do
@@ -42925,6 +42927,7 @@ For platform-specific bugs, see the sections about compiling and porting.
 @appendix MySQL and the future (The TODO)
 
 @menu
+* TODO MySQL 4.0::              Things that should be in 4.0
 * TODO future::                 Things that must done in the very near future
 * TODO sometime::               Things that have to be done sometime
 * TODO unplanned::              Some things we don't have any plans to do
@@ -42934,16 +42937,66 @@ Everything in this list is in the order it will be done.  If you want to
 affect the priority order, please register a license or support us and
 tell us what you want to have done more quickly. @xref{Licensing and Support}.
 
-@node TODO future, TODO sometime, TODO, TODO
-@appendixsec Things that must done in the real near future
+@node TODO MySQL 4.0, TODO future, TODO, TODO
+@appendixsec Things that should be in 4.0
+
+We plan to make @strong{MySQL} 4.0 a 'quick' release where we only add
+some new stuff to enable others to help us with developing new features
+into 4.1.  The @strong{MySQL} 4.0 version should only take us about a
+month to make after which we want to stabilize it and start working on
+4.1.  4.0 should have the following new features:
 
 @itemize @bullet
 @item
-Fail safe replication.
+New table definition file format (@code{.frm} files) This will enable us
+to not run out of bits when adding more table options.  One will still
+be able to use the old .frm file format with 4.0;  All new created tables
+will however use the new format.
+
+The new file format will enable us to add new column types, more options
+for keys and @code{FOREIGN KEYS}.
+@item
+@code{mysqld} as a library.  This will have the same interface as the
+standard MySQL client (with an extra function to just set up startup
+parameters) but will be faster (no TCP/IP or socket overhead), smaller
+and much easer to use from embedded products.
+
+One will be able to define at link time if one wants to use the
+client/server model or a stand-alone application just by defining which
+library to link with.
+
+The @code{mysqld} will support all standard @strong{MySQL} features and
+one can use it in a threaded client to run different queries in each
+thread.
+@item
+Online backup with very low performance penalty.  The online backup will
+make it easy to add a new replication slave without taking down the
+master.
+@item
+@code{DELETE FROM table_name} will return the number of deleted rows. For
+fast execution one should use @code{TRUNCATE table_name}.
+@item
+Multi table deletes (cascading deletes) and multi table updates.
 @item
-Optimize, test and document transactions safe tables (BDB tables)
+Better replication.
 @item
-Allow users to change startup options.
+More functions for full text search.
+@item
+Character set casts and syntax for handling multiple character sets.
+@item
+Allow users to change startup options without taking down the server.
+@item
+Help for all commands from the client.
+@item
+Secure connections (with SSL).
+@end itemize
+
+@node TODO future, TODO sometime, TODO MySQL 4.0, TODO
+@appendixsec Things that must done in the real near future
+
+@itemize @bullet
+@item
+Fail safe replication.
 @item
 Subqueries. @code{select id from t where grp in (select grp from g where u > 100)}
 @item

mysys/my_open.c

@@ -40,7 +40,7 @@ File my_open(const char *FileName, int Flags, myf MyFlags)
   else
     fd = open((my_string) FileName, Flags | O_BINARY);
 #elif !defined(NO_OPEN_3)
-  fd = open(FileName, Flags, 0);	/* Normal unix */
+  fd = open(FileName, Flags, my_umask);	/* Normal unix */
 #else
   fd = open((my_string) FileName, Flags);
 #endif

sql/log.cc

@@ -156,7 +156,7 @@ void MYSQL_LOG::open(const char *log_name, enum_log_type log_type_arg,
   do_magic = ((log_type == LOG_BIN) && !my_stat(log_file_name,
 						&tmp_stat, MYF(0)));
   
-  if ((file=my_open(log_file_name,O_APPEND | O_WRONLY | O_BINARY,
+  if ((file=my_open(log_file_name,O_CREAT | O_APPEND | O_WRONLY | O_BINARY,
 		    MYF(MY_WME | ME_WAITTANG))) < 0 ||
       init_io_cache(&log_file, file, IO_SIZE, WRITE_CACHE,
 		    my_tell(file,MYF(MY_WME)), 0, MYF(MY_WME | MY_NABP)))
@@ -194,28 +194,38 @@ void MYSQL_LOG::open(const char *log_name, enum_log_type log_type_arg,
   }
   else if (log_type == LOG_BIN)
   {
-    // Explanation of the boolean black magic:
-    //
-    // if we are supposed to write magic number try write
-    // clean up if failed
-    // then if index_file has not been previously opened, try to open it
-    // clean up if failed
-
+    /*
+      Explanation of the boolean black magic:
+      if we are supposed to write magic number try write
+      clean up if failed
+      then if index_file has not been previously opened, try to open it
+      clean up if failed
+    */
     if ((do_magic && my_b_write(&log_file, (byte*) BINLOG_MAGIC, 4)) ||
 	(index_file < 0 && 
-	 (index_file = my_open(index_file_name,O_APPEND | O_BINARY | O_RDWR,
+	 (index_file = my_open(index_file_name, O_CREAT | O_APPEND |
+			       O_BINARY | O_RDWR,
 			       MYF(MY_WME))) < 0))
       goto err;
     Start_log_event s;
+    bool error;
     s.write(&log_file);
     pthread_mutex_lock(&LOCK_index);
-    my_write(index_file, log_file_name,strlen(log_file_name), MYF(0));
-    my_write(index_file, "\n",1, MYF(0));
+    error=(my_write(index_file, log_file_name,strlen(log_file_name),
+		    MYF(MY_NABP | MY_WME)) ||
+	   my_write(index_file, "\n", 1, MYF(MY_NABP | MY_WME)));
     pthread_mutex_unlock(&LOCK_index);
+    if (error)
+    {
+      my_close(index_file,MYF(0));
+      index_file= -1;
+      goto err;
+    }
   }
   return;
 
 err:
+  sql_print_error("Could not use %s for logging (error %d)", log_name,errno);
   if (file >= 0)
     my_close(file,MYF(0));
   end_io_cache(&log_file);
@@ -409,7 +419,7 @@ int MYSQL_LOG::purge_logs(THD* thd, const char* to_log)
 #ifdef HAVE_FTRUNCATE
   if (ftruncate(index_file,0))
   {
-    sql_print_error("Ouch! Could not truncate the binlog index file \
+    sql_print_error("Could not truncate the binlog index file \
 during log purge for write");
     error = LOG_INFO_FATAL;
     goto err;
@@ -418,10 +428,11 @@ during log purge for write");
 #else
   my_close(index_file, MYF(MY_WME));
   my_delete(index_file_name, MYF(MY_WME));
-  if(!(index_file = my_open(index_file_name, O_BINARY | O_RDWR | O_APPEND,
+  if(!(index_file = my_open(index_file_name,
+			    O_CREAT | O_BINARY | O_RDWR | O_APPEND,
 			    MYF(MY_WME))))
   {
-    sql_print_error("Ouch! Could not re-open the binlog index file \
+    sql_print_error("Could not re-open the binlog index file \
 during log purge for write");
     error = LOG_INFO_FATAL;
     goto err;

sql/sql_class.cc

@@ -114,7 +114,7 @@ THD::THD()
   ull=0;
   system_thread=0;
   bzero((char*) &mem_root,sizeof(mem_root));
-#if defined(HAVE_BDB) || defined(HAVE_INNOBASE) || defined(HAVE_GEMENI)
+#if defined(HAVE_BERKELEY_DB) || defined(HAVE_INNOBASE_DB) || defined(HAVE_GEMENI_DB)
   if (open_cached_file(&transactions.trans_log,
 		       mysql_tempdir,LOG_PREFIX,0,MYF(MY_WME)))
     killed=1;
@@ -143,7 +143,7 @@ THD::~THD()
     close_thread_tables(this);
   }
   close_temporary_tables(this);
-#if defined(HAVE_BDB) || defined(HAVE_INNOBASE) || defined(HAVE_GEMENI)
+#if defined(HAVE_BERKELEY_DB) || defined(HAVE_INNOBASE_DB) || defined(HAVE_GEMENI_DB)
   close_cached_file(transactions.trans_log);
 #endif
   if (global_read_lock)

sql/sql_class.h

@@ -238,7 +238,7 @@ public:
   const char *where;
   char* last_nx_table; // last non-existent table, we need this for replication
   char* last_nx_db; // database of the last nx table
-  time_t  start_time,time_after_lock;
+  time_t  start_time,time_after_lock,user_time;
   time_t  connect_time,thr_create_time; // track down slow pthread_create
   thr_lock_type update_lock_default;
   delayed_insert *di;
@@ -265,7 +265,7 @@ public:
   char	     scramble[9];
   bool	     set_query_id,locked,count_cuted_fields,some_tables_deleted;
   bool	     no_errors, allow_sum_func, password, fatal_error;
-  bool	     query_start_used,last_insert_id_used,insert_id_used,user_time;
+  bool	     query_start_used,last_insert_id_used,insert_id_used;
   bool	     volatile killed,bootstrap;
   bool	     system_thread,in_lock_tables,global_read_lock;
   bool       query_error;
@@ -277,9 +277,9 @@ public:
   ~THD();
   bool store_globals();
   inline time_t query_start() { query_start_used=1; return start_time; }
-  inline void	set_time()    { if (!user_time) time_after_lock=time(&start_time); }
+  inline void	set_time()    { if (user_time) start_time=time_after_lock=user_time; else time_after_lock=time(&start_time); }
   inline void	end_time()    { time(&start_time); }
-  inline void	set_time(time_t t) { time_after_lock=start_time=t; user_time=1; }
+  inline void	set_time(time_t t) { time_after_lock=start_time=user_time=t; }
   inline void	lock_time()   { time(&time_after_lock); }
   inline void	insert_id(ulonglong id)
   { last_insert_id=id; insert_id_used=1; }