Portability fixes

Docs/manual.texi

@@ -500,6 +500,7 @@ Examples of common queries
 * example-Maximum-row::         The row holding the maximum of a certain column
 * example-Maximum-column-group::  Maximum of column per group
 * example-Maximum-column-group-row::  The rows holding the group-wise maximum of a certain field
+* example-user-variables::      
 * example-Foreign keys::        Using foreign keys
 
 Creating and using a database
@@ -948,7 +949,7 @@ Changes in release 3.19.x
 
 MySQL and the future (The TODO)
 
-* TODO MySQL 4.0::              
+* 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
@@ -22657,6 +22658,7 @@ SELECT * FROM shop
 * example-Maximum-row::         The row holding the maximum of a certain column
 * example-Maximum-column-group::  Maximum of column per group
 * example-Maximum-column-group-row::  The rows holding the group-wise maximum of a certain field
+* example-user-variables::      
 * example-Foreign keys::        Using foreign keys
 @end menu
 
@@ -22736,7 +22738,7 @@ GROUP BY article
 +---------+-------+
 @end example
 
-@node example-Maximum-column-group-row, example-Foreign keys, example-Maximum-column-group, Examples
+@node example-Maximum-column-group-row, example-user-variables, example-Maximum-column-group, Examples
 @subsection The rows holding the group-wise maximum of a certain field
 
 ``For each article, find the dealer(s) with the most expensive price.''
@@ -22807,9 +22809,31 @@ GROUP BY article;
 The last example can of course be made a bit more efficient by doing the
 splitting of the concatenated column in the client.
 
+@node example-user-variables, example-Foreign keys, example-Maximum-column-group-row, Examples
+@subsection Using user variables
+
+You can use @strong{MySQL} user variables to remember results without
+having to store them in a temporary variables in the client.
+@xref{Variables}.
+
+For example to find the articles with the highest and lowest price you
+can do:
+
+@example
+select @@min_price:=min(price),@@max_price:=max(price) from shop;
+select * from shop where price=@@min_price or price=@@max_price;
+
++---------+--------+-------+
+| article | dealer | price |
++---------+--------+-------+
+|    0003 | D      |  1.25 |
+|    0004 | D      | 19.95 |
++---------+--------+-------+
+@end example
+
 @cindex foreign keys
 @cindex keys, foreign
-@node example-Foreign keys,  , example-Maximum-column-group-row, Examples
+@node example-Foreign keys,  , example-user-variables, Examples
 @subsection Using foreign keys
 
 You don't need foreign keys to join 2 tables.
@@ -37609,6 +37633,8 @@ With source code. By Matthias Fichtner.
 A library to use @strong{MySQL} with Delphi}
 
 @item @uref{http://www.geocities.com/CapeCanaveral/2064/mysql.html, Delphi TDataset-component}
+@item 
+@item @uref{http://www.mysql.com/Downloads/Contrib/Win32/SBMySQL50Share.exe, Delphi 5 Shareware MySQL Dataset Components}
 @end itemize
 
 @item @uref{http://www.mysql.com/Downloads/Contrib/mysql-ruby-2.2.0.tar.gz, mysql-ruby-2.2.0.tar.gz}
@@ -37752,9 +37778,13 @@ An open source client for exploring databases and executing SQL. Supports
 A query tool for @strong{MySQL} and PostgreSQL.
 @item @uref{http://dbman.linux.cz/,dbMan}
 A query tool written in Perl. Uses DBI and Tk.
-@item @uref{http://www.mysql.com/Downloads/Contrib/mascon1.exe, mascon1.exe}
-You can get the newest one from
-@uref{http://www.scibit.com/Products/Software/Utils/Mascon.asp,Mascon.asp}.
+@item @uref{http://www.mysql.com/Downloads/Win32/Msc18.exe, Mascon 2000.1.8}
+@item @uref{http://www.mysql.com/Downloads/Win32/FrMsc18.exe, Free Mascon 2000.1.8}
+Mascon is a powerful Win32 GUI for the administering MySQL server
+databases. Mascon's features include visual table design, connections to
+multiple servers, data and blob editing of tables, security setting, SQL
+colour coding, dump functionality and much more.
+@uref{http://www.scibit.com/Products/Software/Utils/Mascon.asp,Mascon home page}.
 @item @uref{http://www.virtualbeer.net/dbui/,DBUI}
 DBUI is a Gtk graphical database editor.
 @end itemize
@@ -38503,6 +38533,9 @@ though, so Version 3.23 is not released as a stable version yet.
 @item
 Fixed the @code{--skip-networking} works properly on NT.
 @item
+Fixed long outstanding bug in the @code{ISAM} tables when a row with a length
+of more than 65K was shortened by a single byte.
+@item
 Fixed bug in @code{MyISAM} when running multiple updating processes on
 the same table.
 @item

client/mysql.cc

@@ -115,9 +115,8 @@ static bool info_flag=0,ignore_errors=0,wait_flag=0,quick=0,
 	    no_rehash=0,skip_updates=0,safe_updates=0,one_database=0,
 	    opt_compress=0,
 	    vertical=0,skip_line_numbers=0,skip_column_names=0,opt_html=0,
-            opt_nopager=1, opt_outfile=0,
-            no_named_cmds=1;
-static uint verbose=0,opt_silent=0,opt_mysql_port=0;
+	    opt_nopager=1, opt_outfile=0, no_named_cmds=1;
+static uint verbose=0,opt_silent=0,opt_mysql_port=0,opt_connect_timeout=0;
 static my_string opt_mysql_unix_port=0;
 static int connect_flag=CLIENT_INTERACTIVE;
 static char *current_host,*current_db,*current_user=0,*opt_password=0,
@@ -363,8 +362,8 @@ sig_handler mysql_end(int sig)
   exit(status.exit_status);
 }
 
-enum options {OPT_CHARSETS_DIR=256, OPT_DEFAULT_CHARSET, OPT_PAGER, 
-	      OPT_NOPAGER, OPT_TEE, OPT_NOTEE} ;
+enum options {OPT_CHARSETS_DIR=256, OPT_DEFAULT_CHARSET, OPT_TIMEOUT,
+	      OPT_PAGER, OPT_NOPAGER, OPT_TEE, OPT_NOTEE} ;
 
 
 static struct option long_options[] =
@@ -378,7 +377,7 @@ static struct option long_options[] =
 #endif
   {"database",	    required_argument,     0, 'D'},
   {"debug-info",    no_argument,	   0, 'T'},
-  {"default-character-set", required_argument, 0, OPT_DEFAULT_CHARSET},
+  {"default-character-set", required_argument,0, OPT_DEFAULT_CHARSET},
   {"enable-named-commands", no_argument,   0, 'G'},
   {"execute",	    required_argument,	   0, 'e'},
   {"force",	    no_argument,	   0, 'f'},
@@ -412,6 +411,7 @@ static struct option long_options[] =
   {"socket",	    required_argument,	   0, 'S'},
 #include "sslopt-longopts.h"
   {"table",	    no_argument,	   0, 't'},
+  {"timeout",	    required_argument,	   0, OPT_TIMEOUT},
 #ifndef DONT_ALLOW_USER_CHANGE
   {"user",	    required_argument,	   0, 'u'},
 #endif
@@ -425,7 +425,7 @@ static struct option long_options[] =
 
 
 CHANGEABLE_VAR changeable_vars[] = {
-  { "max_allowed_packet", (long*) &max_allowed_packet,24*1024L*1024L,4096,
+  { "max_allowed_packet", (long*) &max_allowed_packet,16*1024L*1024L,4096,
     24*1024L*1024L, MALLOC_OVERHEAD,1024},
   { "net_buffer_length",(long*) &net_buffer_length,16384,1024,24*1024*1024L,
     MALLOC_OVERHEAD,1024},
@@ -627,9 +627,12 @@ static int get_options(int argc, char **argv)
     case 'p':
       if (optarg)
       {
+	char *start=optarg;
 	my_free(opt_password,MYF(MY_ALLOW_ZERO_PTR));
 	opt_password=my_strdup(optarg,MYF(MY_FAE));
 	while (*optarg) *optarg++= 'x';		// Destroy argument
+	if (*start)
+	  start[1]=0;
       }
       else
 	tty_password=1;
@@ -685,6 +688,9 @@ static int get_options(int argc, char **argv)
       opt_mysql_unix_port=my_strdup(MYSQL_NAMEDPIPE,MYF(0));
 #endif
       break;
+    case OPT_TIMEOUT:
+      opt_connect_timeout=atoi(optarg);
+      break;
     case 'V': usage(1); exit(0);
     case 'I':
     case '?':
@@ -2026,6 +2032,9 @@ sql_real_connect(char *host,char *database,char *user,char *password,
     connected= 0;
   }
   mysql_init(&mysql);
+  if (opt_connect_timeout)
+    mysql_options(&mysql,MYSQL_OPT_CONNECT_TIMEOUT,
+		  (char*) &opt_connect_timeout);
   if (opt_compress)
     mysql_options(&mysql,MYSQL_OPT_COMPRESS,NullS);
 #ifdef HAVE_OPENSSL
@@ -2258,9 +2267,9 @@ void tee_fprintf(FILE *file, const char *fmt, ...)
   va_list args;
 
   va_start(args, fmt);
-  VOID(vfprintf(file, fmt, args));
+  (void) vfprintf(file, fmt, args);
   if (opt_outfile)
-    VOID(vfprintf(OUTFILE, fmt, args));
+    (void) vfprintf(OUTFILE, fmt, args);
   va_end(args);
 }
 

isam/_dynrec.c

@@ -104,7 +104,8 @@ int _nisam_delete_dynamic_record(N_INFO *info)
 
 	/* Write record to data-file */
 
-static int write_dynamic_record(N_INFO *info, const byte *record, uint reclength)
+static int write_dynamic_record(N_INFO *info, const byte *record,
+				uint reclength)
 {
   int flag;
   uint length;
@@ -142,8 +143,9 @@ static int _nisam_find_writepos(N_INFO *info,
     *filepos=info->s->state.dellink;
     block_info.second_read=0;
     info->rec_cache.seek_not_done=1;
-    if (!(_nisam_get_block_info(&block_info,info->dfile,info->s->state.dellink) &
-	   BLOCK_DELETED))
+
+    if (!(_nisam_get_block_info(&block_info,info->dfile,
+				info->s->state.dellink) & BLOCK_DELETED))
     {
       my_errno=HA_ERR_WRONG_IN_RECORD;
       DBUG_RETURN(-1);
@@ -213,7 +215,7 @@ int _nisam_write_part_record(N_INFO *info,
       extra_length++;				/* One empty */
     }
   }
-  else if (length-long_block < *reclength+5)
+  else if (length-long_block*2 < *reclength+5)
   {						/* To short block */
     if (next_filepos == NI_POS_ERROR)
       next_filepos=info->s->state.dellink != NI_POS_ERROR ?

scripts/mysqlhotcopy.sh

@@ -19,13 +19,24 @@ mysqlhotcopy - fast on-line hot-backup utility for local MySQL databases
 
   mysqlhotcopy db_name_1 ... db_name_n /path/to/new_directory
 
+  mysqlhotcopy db_name./regex/
+
+  mysqlhotcopy db_name./^\(foo\|bar\)/
+
+  mysqlhotcopy db_name./~regex/
+
+  mysqlhotcopy db_name_1./regex_1/ db_name_1./regex_2/ ... db_name_n./regex_n/ /path/to/new_directory
+
+  mysqlhotcopy --method='scp -Bq -i /usr/home/foo/.ssh/identity' --user=root --password=secretpassword \
+         db_1./^nice_table/ user@some.system.dom:~/path/to/new_directory
+
 WARNING: THIS IS VERY MUCH A FIRST-CUT ALPHA. Comments/patches welcome.
 
 =cut
 
 # Documentation continued at end of file
 
-my $VERSION = "1.7";
+my $VERSION = "1.8";
 
 my $OPTIONS = <<"_OPTIONS";
 
@@ -39,7 +50,7 @@ Usage: $0 db_name [new_db_name | directory]
 
   --allowold           don't abort if target already exists (rename it _old)
   --keepold            don't delete previous (now renamed) target when done
-  --noindices          don't copy index files
+  --indices            include index files in copy
   --method=#           method for copy (only "cp" currently supported)
 
   -q, --quiet          be silent except for errors
@@ -50,6 +61,8 @@ Usage: $0 db_name [new_db_name | directory]
   --suffix=#           suffix for names of copied databases
   --checkpoint=#       insert checkpoint entry into specified db.table
   --flushlog           flush logs once all tables are locked 
+
+  Try 'perldoc $0 for more complete documentation'
 _OPTIONS
 
 sub usage {
@@ -90,6 +103,7 @@ GetOptions( \%opt,
 # a list of hash-refs containing:
 #
 #   'src'     - name of the db to copy
+#   't_regex' - regex describing tables in src
 #   'target'  - destination directory of the copy
 #   'tables'  - array-ref to list of tables in the db
 #   'files'   - array-ref to list of files to be copied
@@ -100,12 +114,14 @@ my $tgt_name = undef;
 
 if ( $opt{regexp} || $opt{suffix} || @ARGV > 2 ) {
     $tgt_name   = pop @ARGV unless ( exists $opt{suffix} );
-    @db_desc = map { { 'src' => $_ } } @ARGV;
+    @db_desc = map { s{^([^\.]+)\./(.+)/$}{$1}; { 'src' => $_, 't_regex' => ( $2 ? $2 : '.*' ) } } @ARGV;
 }
 else {
     usage("Database name to hotcopy not specified") unless ( @ARGV );
 
-    @db_desc = ( { 'src' => $ARGV[0] } );
+    $ARGV[0] =~ s{^([^\.]+)\./(.+)/$}{$1};
+    @db_desc = ( { 'src' => $ARGV[0], 't_regex' => ( $2 ? $2 : '.*' ) } );
+
     if ( @ARGV == 2 ) {
 	$tgt_name   = $ARGV[1];
     }
@@ -195,15 +211,35 @@ foreach my $rdb ( @db_desc ) {
     die "Database '$db' not accessible: $@"  if ( $@ );
     my @dbh_tables = $dbh->func( '_ListTables' );
 
+    ## generate regex for tables/files
+    my $t_regex = $rdb->{t_regex};        ## assign temporary regex
+    my $negated = $t_regex =~ tr/~//d;    ## remove and count negation operator: we don't allow ~ in table names
+    $t_regex = qr/$t_regex/;              ## make regex string from user regex
+
+    ## filter (out) tables specified in t_regex
+    print "Filtering tables with '$t_regex'\n" if $opt{debug};
+    @dbh_tables = ( $negated 
+		    ? grep { $_ !~ $t_regex } @dbh_tables 
+		    : grep { $_ =~ $t_regex } @dbh_tables );
+
+    ## get list of files to copy
     my $db_dir = "$datadir/$db";
     opendir(DBDIR, $db_dir ) 
       or die "Cannot open dir '$db_dir': $!";
 
-    my @db_files = grep { /.+\.\w+$/ } readdir(DBDIR)
-      or warn "'$db' is an empty database\n";
-
+    my %db_files;
+    map { ( /(.+)\.\w+$/ ? { $db_files{$_} = $1 } : () ) } readdir(DBDIR);
+    unless( keys %db_files ) {
+	warn "'$db' is an empty database\n";
+    }
     closedir( DBDIR );
 
+    ## filter (out) files specified in t_regex
+    my @db_files = sort ( $negated 
+			  ? grep { $db_files{$_} !~ $t_regex } keys %db_files
+			  : grep { $db_files{$_} =~ $t_regex } keys %db_files );
+
+    ## remove indices unless we're told to keep them
     unless ($opt{indices}) {
 	@db_files = grep { not /\.(ISM|MYI)$/ } @db_files;
     }
@@ -238,6 +274,12 @@ if (length $tgt_name ) {
 	$rdb->{target} = "$tgt_dirname";
       }
     }
+    elsif ($opt{method} =~ /^scp\b/) 
+    {   # we have to trust scp to hit the target
+	foreach my $rdb ( @db_desc ) {
+	    $rdb->{target} = "$tgt_dirname/$rdb->{src}";
+	}
+    }
     else
     {
       die "Last argument ($tgt_dirname) is not a directory\n"
@@ -278,6 +320,10 @@ foreach my $rdb ( @db_desc ) {
     if ( $opt{dryrun} ) {
 	print "mkdir $tgt_dirpath, 0750\n";
     }
+    elsif ($opt{method} =~ /^scp\b/) {
+	## assume it's there?
+	## ...
+    }
     else {
 	mkdir($tgt_dirpath, 0750)
 	  or die "Can't create '$tgt_dirpath': $!\n";
@@ -410,11 +456,16 @@ sub copy_files {
     my ($method, $files, $target) = @_;
     my @cmd;
     print "Copying ".@$files." files...\n" unless $opt{quiet};
+
     if ($method =~ /^s?cp\b/) { # cp or scp with optional flags
 	@cmd = ($method);
 	# add option to preserve mod time etc of copied files
 	# not critical, but nice to have
-	push @cmd, "-p" if $^O =~ m/^(solaris|linux)$/;
+	push @cmd, "-p" if $^O =~ m/^(solaris|linux|freebsd)$/;
+
+	# add recursive option for scp
+	push @cmd, "-r" if $^O =~ /m^(solaris|linux|freebsd)$/ && $method =~ /^scp\b/;
+
 	# add files to copy and the destination directory
 	push @cmd, @$files, $target;
     }
@@ -427,10 +478,13 @@ sub copy_files {
 	next;
     }
 
+    ## for some reason system fails but backticks works ok for scp...
     print "Executing '@cmd'\n" if $opt{debug};
     my $cp_status = system @cmd;
     if ($cp_status != 0) {
-	die "Error: @cmd failed ($cp_status) while copying files.\n";
+	warn "Burp ('scuse me). Trying backtick execution...\n" if $opt{debug}; #'
+	## try something else
+	`@cmd` && die "Error: @cmd failed ($cp_status) while copying files.\n";
     }
 }
 
@@ -520,7 +574,22 @@ locked, and before they are copied.
 
 =item --regexp pattern
 
-Copy all databases with names matching the pattern.  
+Copy all databases with names matching the pattern
+
+=item db_name./pattern/
+
+Copy only tables matching pattern. Shell metacharacters ( (, ), |, !,
+etc.) have to be escaped (e.g. \). For example, to select all tables
+in database db1 whose names begin with 'foo' or 'bar':
+
+    mysqlhotcopy --indices --method=cp db1./^\(foo\|bar\)/
+
+=item db_name./~pattern/
+
+Copy only tables not matching pattern. For example, to copy tables
+that do not begin with foo nor bar:
+
+    mysqlhotcopy --indices --method=cp db1./~^\(foo\|bar\)/
 
 =item -?, --help
 
@@ -542,13 +611,25 @@ port to use when connecting to local server
 
 UNIX domain socket to use when connecting to local server
 
-=item  --noindices          
+=item  --indices          
 
-don't copy index files
+include index files in copy
 
 =item  --method=#           
 
-method for copy (only "cp" currently supported)
+method for copy (only "cp" currently supported). Alpha support for
+"scp" was added in November 2000. Your experience with the scp method
+will vary with your ability to understand how scp works. 'man scp'
+and 'man ssh' are your friends.
+
+The destination directory _must exist_ on the target machine using
+the scp method. Liberal use of the --debug option will help you figure
+out what's really going on when you do an scp.
+
+Note that using scp will lock your tables for a _long_ time unless
+your network connection is _fast_. If this is unacceptable to you,
+use the 'cp' method to copy the tables to some temporary area and then
+scp or rsync the files at your leisure.
 
 =item -q, --quiet              
 
@@ -575,12 +656,8 @@ Patches adding bug fixes, documentation and new features are welcome.
 
 =head1 TO DO
 
-Allow a list of tables (or regex) to be given on the command line to
-enable a logically-related subset of the tables to be hot-copied
-rather than force the whole db to be copied in one go.
-
-Extend the above to allow multiple subsets of tables to be specified
-on the command line:
+Extend the individual table copy to allow multiple subsets of tables
+to be specified on the command line:
 
   mysqlhotcopy db newdb  t1 t2 /^foo_/ : t3 /^bar_/ : +
 
@@ -609,5 +686,6 @@ Tim Bunce
 
 Martin Waite - added checkpoint, flushlog, regexp and dryrun options
 
-Ralph Corderoy - Added synonyms for commands
-=cut
+Ralph Corderoy - added synonyms for commands
+
+Scott Wiersdorf - added table regex and scp support

sql-bench/test-insert.sh

@@ -365,6 +365,25 @@ else
 print " for order_by_big ($small_loop_count:$rows): " .
   timestr(timediff($end_time, $loop_time),"all") . "\n";
 
+$loop_time=new Benchmark;
+$estimated=$rows=0;
+for ($i=1 ; $i <= $range_loop_count ; $i++)
+{
+  $start=$opt_loop_count/$range_loop_count*$i;
+  $end=$start+$i;
+  $rows+=fetch_all_rows($dbh,"select dummy1 from bench1 where id>=$start and id <= $end order by id3",1);
+  $end_time=new Benchmark;
+  last if ($estimated=predict_query_time($loop_time,$end_time,\$i,$i,
+					 $range_loop_count));
+}
+if ($estimated)
+{ print "Estimated time"; }
+else
+{ print "Time"; }
+print " for order_by_range ($range_loop_count:$rows): " .
+  timestr(timediff($end_time, $loop_time),"all") . "\n";
+
+
 $loop_time=new Benchmark;
 $estimated=$rows=0;
 for ($i=1 ; $i <= $range_loop_count ; $i++)

sql/log.cc

@@ -171,7 +171,7 @@ void MYSQL_LOG::open(const char *log_name, enum_log_type log_type_arg,
     sprintf(buff, "%s, Version: %s, started with:\nTcp port: %d  Unix socket: %s\n", my_progname,server_version,mysql_port,mysql_unix_port);
 #endif
     end=strmov(strend(buff),"Time                 Id Command    Argument\n");
-    if (my_b_write(&log_file,buff,(uint) (end-buff)) ||
+    if (my_b_write(&log_file, (byte*) buff,(uint) (end-buff)) ||
 	flush_io_cache(&log_file))
       goto err;
   }
@@ -188,7 +188,7 @@ void MYSQL_LOG::open(const char *log_name, enum_log_type log_type_arg,
 	    tm_tmp.tm_hour,
 	    tm_tmp.tm_min,
 	    tm_tmp.tm_sec);
-    if (my_b_write(&log_file,buff,(uint) strlen(buff)) ||
+    if (my_b_write(&log_file, (byte*) buff,(uint) strlen(buff)) ||
 	flush_io_cache(&log_file))
       goto err;
   }
@@ -212,9 +212,9 @@ void MYSQL_LOG::open(const char *log_name, enum_log_type log_type_arg,
     s.write(&log_file);
     flush_io_cache(&log_file);
     pthread_mutex_lock(&LOCK_index);
-    error=(my_write(index_file, log_file_name,strlen(log_file_name),
+    error=(my_write(index_file, (byte*) log_file_name, strlen(log_file_name),
 		    MYF(MY_NABP | MY_WME)) ||
-	   my_write(index_file, "\n", 1, MYF(MY_NABP | MY_WME)));
+	   my_write(index_file, (byte*) "\n", 1, MYF(MY_NABP | MY_WME)));
     pthread_mutex_unlock(&LOCK_index);
     if (error)
     {
@@ -444,8 +444,8 @@ during log purge for write");
   {
     char* l;
     get_dynamic(&logs_to_keep, (gptr)&l, i);
-    if (my_write(index_file, l, strlen(l), MYF(MY_WME|MY_NABP)) ||
-	my_write(index_file, "\n", 1, MYF(MY_WME|MY_NABP)))
+    if (my_write(index_file, (byte*) l, strlen(l), MYF(MY_WME|MY_NABP)) ||
+	my_write(index_file, (byte*) "\n", 1, MYF(MY_WME|MY_NABP)))
     {
       error = LOG_INFO_FATAL;
       goto err;
@@ -571,21 +571,21 @@ void MYSQL_LOG::write(THD *thd,enum enum_server_command command,
 		start->tm_hour,
 		start->tm_min,
 		start->tm_sec);
-	if (my_b_write(&log_file,buff,16))
+	if (my_b_write(&log_file, (byte*) buff,16))
 	  error=errno;
       }
-      else if (my_b_write(&log_file,"\t\t",2) < 0)
+      else if (my_b_write(&log_file, (byte*) "\t\t",2) < 0)
 	error=errno;
       sprintf(buff,"%7ld %-10.10s", id,command_name[(uint) command]);
-      if (my_b_write(&log_file,buff,strlen(buff)))
+      if (my_b_write(&log_file, (byte*) buff,strlen(buff)))
 	error=errno;
       if (format)
       {
-	if (my_b_write(&log_file," ",1) ||
+	if (my_b_write(&log_file, (byte*) " ",1) ||
 	    my_b_vprintf(&log_file,format,args) == (uint) -1)
 	  error=errno;
       }
-      if (my_b_write(&log_file,"\n",1) ||
+      if (my_b_write(&log_file, (byte*) "\n",1) ||
 	  flush_io_cache(&log_file))
 	error=errno;
       if (error && ! write_error)
@@ -711,7 +711,6 @@ void MYSQL_LOG::write(THD *thd,const char *query, uint query_length,
 	  last_time=current_time;
 	  struct tm tm_tmp;
 	  struct tm *start;
-	  char buff[32];
 	  localtime_r(&current_time,&tm_tmp);
 	  start=&tm_tmp;
 	  /* Note that my_b_write() assumes it knows the length for this */
@@ -722,7 +721,7 @@ void MYSQL_LOG::write(THD *thd,const char *query, uint query_length,
 		  start->tm_hour,
 		  start->tm_min,
 		  start->tm_sec);
-	  if (my_b_write(&log_file,buff,24))
+	  if (my_b_write(&log_file, (byte*) buff,24))
 	    error=errno;
 	}
 	if (my_b_printf(&log_file, "# User@Host: %s [%s] @ %s [%s]\n",
@@ -778,8 +777,8 @@ void MYSQL_LOG::write(THD *thd,const char *query, uint query_length,
 	*end++=';';
 	*end++='\n';
 	*end=0;
-	if (my_b_write(&log_file,"SET ",4) ||
-	    my_b_write(&log_file,buff+1,(uint) (end-buff)-1))
+	if (my_b_write(&log_file, (byte*) "SET ",4) ||
+	    my_b_write(&log_file, (byte*) buff+1,(uint) (end-buff)-1))
 	  error=errno;
       }
       if (!query)
@@ -787,8 +786,8 @@ void MYSQL_LOG::write(THD *thd,const char *query, uint query_length,
 	query="#adminstrator command";
 	query_length=21;
       }
-      if (my_b_write(&log_file,(byte*) query,query_length) ||
-	  my_b_write(&log_file,";\n",2) ||
+      if (my_b_write(&log_file, (byte*) query,query_length) ||
+	  my_b_write(&log_file, (byte*) ";\n",2) ||
 	  flush_io_cache(&log_file))
 	error=errno;
       if (error && ! write_error)

sql/log_event.h

@@ -363,7 +363,7 @@ public:
   Stop_log_event(IO_CACHE* file, time_t when_arg, uint32 server_id):
     Log_event(when_arg,0,0,server_id)
   {
-    char skip[4];
+    byte skip[4];
     my_b_read(file, skip, sizeof(skip));	// skip the event length
   }
   Stop_log_event(const char* buf):Log_event(buf)

sql/mf_iocache.cc

@@ -37,6 +37,7 @@
 #include <errno.h>
 static void my_aiowait(my_aio_result *result);
 #endif
+#include <assert.h>
 
 extern "C" {
 
@@ -233,24 +234,28 @@ my_bool reinit_io_cache(IO_CACHE *info, enum cache_type type,
 
 
 
-	/* Read buffered. Returns 1 if can't read requested characters */
-	/* Returns 0 if record read */
+	/*
+	  Read buffered. Returns 1 if can't read requested characters
+	  This function is only called from the my_b_read() macro
+	  when there isn't enough characters in the buffer to
+	  satisfy the request.
+	  Returns 0 we succeeded in reading all data
+	*/
 
 int _my_b_read(register IO_CACHE *info, byte *Buffer, uint Count)
 {
   uint length,diff_length,left_length;
   my_off_t max_length, pos_in_file;
   
-  if((left_length=(uint) (info->rc_end-info->rc_pos)))
+  if ((left_length=(uint) (info->rc_end-info->rc_pos)))
   {
-    if(Count < left_length)
-      left_length = Count;
-    memcpy(Buffer,info->rc_pos,
-	   (size_t) (left_length));
+    dbug_assert(Count >= left_length);	/* User is not using my_b_read() */
+    memcpy(Buffer,info->rc_pos, (size_t) (left_length));
     Buffer+=left_length;
     Count-=left_length;
   }
-  pos_in_file=info->pos_in_file+ left_length;
+  /* pos_in_file always point on where info->buffer was read */
+  pos_in_file=info->pos_in_file+(uint) (info->rc_end - info->buffer);
   if (info->seek_not_done)
   {					/* File touched, do seek */
     VOID(my_seek(info->file,pos_in_file,MY_SEEK_SET,MYF(0)));

sql/mysqlbinlog.cc

@@ -330,12 +330,12 @@ static void dump_local_log_entries(const char* logname)
     if (position)
     {
       /* skip 'position' characters from stdout */
-      char buff[IO_SIZE];
+      byte buff[IO_SIZE];
       my_off_t length,tmp;
       for (length=position ; length > 0 ; length-=tmp)
       {
 	tmp=min(length,sizeof(buff));
-	if (my_b_read(file,buff,tmp))
+	if (my_b_read(file,buff, (uint) tmp))
 	  exit(1);
       }
     }

sql/mysqld.cc

@@ -569,7 +569,6 @@ static sig_handler print_signal_warning(int sig)
 
 void unireg_end(int signal_number __attribute__((unused)))
 {
-  (void) my_delete(pidfile_name,MYF(0));	// This may not always exist
   clean_up();
   pthread_exit(0);				// Exit is in main thread
 }
@@ -580,7 +579,6 @@ void unireg_abort(int exit_code)
   if (exit_code)
     sql_print_error("Aborting\n");
   clean_up(); /* purecov: inspected */
-  (void) my_delete(pidfile_name,MYF(0));	// This may not always exist
   exit(exit_code); /* purecov: inspected */
 }
 
@@ -610,6 +608,7 @@ void clean_up(void)
   free_defaults(defaults_argv);
   my_free(mysql_tmpdir,MYF(0));
   x_free(opt_bin_logname);
+  (void) my_delete(pidfile_name,MYF(0));	// This may not always exist
   my_end(opt_endinfo ? MY_CHECK_ERROR | MY_GIVE_INFO : 0);
 
   /* Tell main we are ready */
@@ -1520,7 +1519,7 @@ int main(int argc, char **argv)
     sql_print_error("Can't init databases");
     exit(1);
   }
-#ifdef HAVE_MLOCKALL
+#if defined(HAVE_MLOCKALL) && defined(MCL_CURRENT)
   if (locked_in_memory && !geteuid())
   {
     ha_key_cache();

sql/slave.cc

@@ -42,7 +42,7 @@ static int create_table_from_dump(THD* thd, NET* net, const char* db,
 static inline char* rewrite_db(char* db);
 static void free_table_ent(TABLE_RULE_ENT* e)
 {
-  my_free((byte*)e, MYF(0));
+  my_free((gptr) e, MYF(0));
 }
 
 static byte* get_table_key(TABLE_RULE_ENT* e, uint* len,
@@ -74,12 +74,12 @@ int tables_ok(THD* thd, TABLE_LIST* tables)
       uint len = strmov(p, tables->real_name) - hash_key ;
       if(do_table_inited) // if there are any do's
 	{
-	  if(hash_search(&replicate_do_table, hash_key, len))
+	  if(hash_search(&replicate_do_table, (byte*) hash_key, len))
 	    return 1;
 	}
       if(ignore_table_inited) // if there are any do's
 	{
-	  if(hash_search(&replicate_ignore_table, hash_key, len))
+	  if(hash_search(&replicate_ignore_table, (byte*) hash_key, len))
 	    return 0; 
 	}
     }

sql/sql_parse.cc

@@ -1559,7 +1559,7 @@ mysql_execute_command(void)
     /* Check if auto_commit mode changed */
     if ((org_options ^ lex->options) & OPTION_AUTO_COMMIT)
     {
-      if (!org_options & OPTION_AUTO_COMMIT)
+      if (!(org_options & OPTION_AUTO_COMMIT))
       {
 	/* We changed to auto_commit mode */
 	thd->options&= ~(ulong) (OPTION_BEGIN);

sql/sql_table.cc

@@ -48,6 +48,7 @@ int mysql_rm_table(THD *thd,TABLE_LIST *tables, my_bool if_exists)
   bool some_tables_deleted=0;
   uint error;
   db_type table_type;
+  TABLE_LIST *table;
   DBUG_ENTER("mysql_rm_table");
 
   /* mark for close and remove all cached entries */
@@ -74,7 +75,7 @@ int mysql_rm_table(THD *thd,TABLE_LIST *tables, my_bool if_exists)
 
   }
   
-  for (TABLE_LIST *table=tables ; table ; table=table->next)
+  for (table=tables ; table ; table=table->next)
   {
     char *db=table->db ? table->db : thd->db;
     if (!close_temporary_table(thd, db, table->real_name))