Merge work:/home/bk/mysql-4.0

into serg.mysql.com:/usr/home/serg/Abk/mysql-4.0

Docs/Flags/costarica.eps

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+0000000000000000000000000000000000000000000000000000000000000000
+0000000000000000000000000000000000000000000000000000000000000000
+0000000000000000000000000000000000000000000000000000000000000000
+0000000000000000000000000000000000000000000000000000000000000000
+
+%%EndBinary
+grestore end % Image Trailer grestore
+grestore % EPS grestore

Docs/Support/colspec-fix.pl

+#!/usr/bin/perl -w
+
+#
+# Script to rewrite colspecs from relative values to absolute values
+#
+
+use strict;
+
+my $table_width  = 12.75;   # cm
+my $gutter_width =  0.09;   # cm
+
+my $str = join '', <>;
+
+$str =~ s{([\t ]*(<colspec colwidth=\".+?\" />\s*)+)}
+         {&rel2abs($1)}ges;
+
+print STDOUT $str;
+exit;
+
+#
+# Definitions for helper sub-routines
+#
+
+sub msg {
+    print STDERR shift, "\n";
+}
+
+sub rel2abs {
+    my $str = shift;
+
+    my @widths = ();
+    my $total  = 0;
+    my $output = '';
+    
+    $str =~ /^(\s+)/;
+    my $ws = $1;
+    
+    while ($str =~ m/<colspec colwidth="(\d+)\*" \/>/g) {
+        $total += $1;
+        push @widths, $1;
+    }
+
+    my $unit = ($table_width - ($#widths * $gutter_width)) / ($total);
+
+    foreach (@widths) {
+        $output .= $ws . '<colspec colwidth="'. sprintf ("%0.2f", $_ * $unit) .'" />' . "\n";
+    }
+    
+    return $output . "\n$ws";
+}

Docs/Support/docbook-fixup.pl

 #!/usr/bin/perl -w
-# 2002-02-15 zak@mysql.com
-# Use -w to make perl print useful warnings about the script being run
 
-sub fix_underscore {
-  $str = shift;
-  $str =~ tr/_/-/;
-  return $str;
-};
+# Fix the output of `makeinfo --docbook` version 4.0c
+# Convert the broken docbook output to well-formed XML that conforms to the O'Reilly idiom
+# See code for detailed comments
+# Authors: Arjen Lentz and Zak Greant
 
-sub strip_emph {
-  $str = shift;
-  $str =~ s{<emphasis>(.+?)</emphasis>}
-           {$1}gs;
-  return $str;
-};
+use strict;
 
-print STDERR "\n--Post-processing makeinfo output--\n";
+my $data  = '';
+my @apx   = ();
+my $apx   = '';
+my @nodes = ();
+my $nodes = '';
 
-# 2002-02-15 zak@mysql.com
-print STDERR "Discard DTD - ORA can add the appropriate DTD for their flavour of DocBook\n";
-<STDIN>;
+msg ("\n-- Post-processing `makeinfo --docbook` output --");
+msg ("** Written to work with makeinfo version 4.0c **\n");
 
-print STDERR "Slurp! In comes the rest of the file. :)\n";
-$data = join "", <STDIN>;
+msg ("Discarding DTD - not required by subsequent scripts");
+# <> is a magic filehandle - either reading lines from stdin or from file(s) specified on the command line
+<>;
 
-# 2002-02-15 zak@mysql.com
-print STDERR "Add an XML processing instruction with the right character encoding\n";
-$data = "<?xml version='1.0' encoding='ISO-8859-1'?>" . $data;
+msg ("Create an XML PI with ISO-8859-1 character encoding");
+$data = "<?xml version='1.0' encoding='ISO-8859-1'?>";
 
-# 2002-02-15 zak@mysql.com
-# Less than optimal - should be fixed in makeinfo
-print STDERR "Put in missing <bookinfo> and <abstract>\n";
-$data =~ s/<book lang="en">/<book lang="en"><bookinfo><abstract>/gs;
+msg ("Get the rest of the data");
+$data = $data . join "", <>;
 
-# 2002-02-15 zak@mysql.com
-print STDERR "Convert existing ampersands to escape sequences \n";
-$data =~ s/&(?!\w+;)/&amp;/gs;
+msg ("Add missing <bookinfo> and <abstract> opening tags");
+# Note the absence of the g (global) pattern modified. This situation can only happen once.
+# ...as soon as we find the first instance, we can stop looking.
+$data =~ s/<book lang="en">/<book lang="en"><bookinfo><abstract>/;
 
-# 2002-02-15 zak@mysql.com
-# Need to talk to Arjen about what the <n> bits are for
-print STDERR "Rework references of the notation '<n>'\n";
-$data =~ s/<(\d)>/[$1]/gs;
+msg ("Removing mailto: from email addresses...");
+$data =~ s/mailto://g;
+
+msg ("Removing INFORMALFIGURE...");
+$data =~ s{<informalfigure>.+?</informalfigure>}
+          {}gs;
+
+msg ("Convert ampersands to XML escape sequences ");
+$data =~ s/&(?!\w+;)/&amp;/g;
   
-# 2002-02-15 zak@mysql.com
-# We might need to encode the high-bit characters to ensure proper representation
-# print STDERR "Converting high-bit characters to entities\n";
-# $data =~ s/([\200-\400])/&get_entity($1)>/gs;
-# There is no get_entity function yet - no point writing it til we need it :)
+msg ("Changing @@ to @...");
+$data =~ s/@@/@/g;
 
-print STDERR "Changing @@ to @...\n";
-$data =~ s/@@/@/gs;
+msg ("Rework references of the notation '<n>'");
+# Need to talk to Arjen about what the <n> bits are for
+$data =~ s/<(\d)>/[$1]/g;
 
-print STDERR "Changing '_' to '-' in references...\n";
-$data =~ s{id=\"(.+?)\"}
-          {"id=\"".&fix_underscore($1)."\""}gsex;
-$data =~ s{linkend=\"(.+?)\"}
-          {"linkend=\"".&fix_underscore($1)."\""}gsex;
+msg ("Changing '_' to '-' in references...");
+$data =~ s{((?:id|linkend)=\".+?\")}
+          {&underscore2hyphen($1)}gex;
 
-print STDERR "Changing ULINK to SYSTEMITEM...\n";
-$data =~ s{<ulink url=\"(.+?)\"></ulink>}
+msg ("Changing ULINK to SYSTEMITEM...");
+$data =~ s{<ulink url=\"(.+?)\">\s*</ulink>}
           {<systemitem role=\"url\">$1</systemitem>}gs;
 
-print STDERR "Removing INFORMALFIGURE...\n";
-$data =~ s{<informalfigure>(.+?)</informalfigure>}
-          {}gs;
-
-print STDERR "Adding PARA inside ENTRY...\n";
+msg ("Adding PARA inside ENTRY...");
 $data =~ s{<entry>(.*?)</entry>}
           {<entry><para>$1</para></entry>}gs;
 
-print STDERR "Removing mailto: from email addresses...\n";
-$data =~ s{mailto:}
-          {}gs;
-
-print STDERR "Fixing spacing problem with titles...\n";
-$data =~ s{</(\w+)>(\w{2,})}
-          {</$1> $2}gs;
+msg ("Fixing spacing problem with titles...");
+$data =~ s{(</\w+>)(\w{2,})}
+          {$1 $2}gs;
 
-# 2002-02-15 arjen@mysql.com
-print STDERR "Adding closing / to XREF...\n";
-$data =~ s{<xref (.+?)>}
-          {<xref $1 />}gs;
+msg ("Adding closing / to XREF and COLSPEC tags...");
+$data =~ s{<(xref|colspec) (.+?)>}
+          {<$1 $2 />}gs;
 
-# 2002-02-22 arjen@mysql.com
-print STDERR "Adding \"See \" to XREFs that used to be \@xref...\n";
-$data =~ s{([\.\'\!\)])[\n ]*<xref }
+# Probably need to strip these
+msg ('Adding "See " to XREFs that used to be @xref...');
+$data =~ s{([.'!)])\s*<xref }
           {$1 See <xref }gs;
 
-# 2002-02-22 arjen@mysql.com
-print STDERR "Adding \"see \" to (XREFs) that used to be (\@pxref)...\n";
-$data =~ s{(\(|[[,;])([\n]*[ ]*)<xref }
+msg ('Adding "see " to (XREFs) that used to be (@pxref)...');
+$data =~ s{([([,;])(\s*)<xref }
           {$1$2see <xref }gs;
 
-# 2002-01-30 arjen@mysql.com
-print STDERR "Removing COLSPEC...\n";
-$data =~ s{\n *<colspec colwidth=\"[0-9]+\*\">}
-          {}gs;
-
-# 2002-01-31 arjen@mysql.com
-print STDERR "Making first row in table THEAD...\n";
-$data =~ s{([ ]*)<tbody>\n([ ]*<row>(.+?)</row>)}
-          {$1<thead>\n$2\n$1</thead>\n$1<tbody>}gs;
+msg ("Making first row in table THEAD...");
+$data =~ s{( *)<tbody>(\s*<row>.+?</row>)}
+          {$1<thead>$2\n$1</thead>\n$1<tbody>}gs;
 
-# 2002-01-31 arjen@mysql.com
-print STDERR "Removing EMPHASIS inside THEAD...\n";
+msg ("Removing EMPHASIS inside THEAD...");
 $data =~ s{<thead>(.+?)</thead>}
-          {"<thead>".&strip_emph($1)."</thead>"}gsex;
+          {"<thead>".&strip_tag($1, 'emphasis')."</thead>"}gsex;
 
-# 2002-01-31 arjen@mysql.com
-print STDERR "Removing lf before /PARA in ENTRY...\n";
-$data =~ s{(<entry><para>(.+?))\n(</para></entry>)}
-          {$1$3}gs;
-
-# 2002-01-31 arjen@mysql.com (2002-02-15 added \n stuff)
-print STDERR "Removing whitespace before /PARA if not on separate line...\n";
-$data =~ s{([^\n ])[ ]+</para>}
-          {$1</para>}gs;
+msg ("Removing empty PARA...");
+$data =~ s{<para>\s*</para>}
+          {}gs;
 
-# 2002-01-31 arjen@mysql.com
-print STDERR "Removing empty PARA in ENTRY...\n";
-$data =~ s{<entry><para></para></entry>}
-          {<entry></entry>}gs;
+msg ("Removing lf before /PARA in ENTRY...");
+$data =~ s{\n(</para></entry>)}
+          {$1}gs;
 
-# 2002-01-31 arjen@mysql.com
-print STDERR "Removing PARA around INDEXENTRY if no text in PARA...\n";
-$data =~ s{<para>((<indexterm role=\"(cp|fn)\">(<(primary|secondary)>[^<]+?</(primary|secondary)>)+?</indexterm>)+?)[\n]*</para>[\n]*}
-          {$1\n}gs;
+msg ("Removing whitespace before /PARA if not on separate line...");
+$data =~ s{(\S+)[\t ]+</para>}
+          {$1</para>}g;
 
-# -----
+msg ("Removing PARA around INDEXTERM if no text in PARA...");
+$data =~ s{<para>((?:<indexterm role=\"(?:cp|fn)\">(?:<(primary|secondary)>[^>]+</\2>)+?</indexterm>)+?)\s*</para>}
+          {$1}gs;
 
-@apx = ("Users", "MySQL Testimonials", "News",
-        "GPL-license", "LGPL-license");
+@apx = ("Users", "MySQL Testimonials", "News", "GPL-license", "LGPL-license");
 
 foreach $apx (@apx) {
-  print STDERR "Removing appendix $apx...\n";
-  $data =~ s{<appendix id=\"$apx\">(.+?)</appendix>}
-            {}gs;
-
-  print STDERR " ... Building list of removed nodes ...\n";
-  foreach(split "\n", $&) {
-    push @nodes, $2 if(/<(\w+) id=\"(.+?)\">/)
-  };
-};
+    msg ("Removing appendix $apx...");
+    $data =~ s{<appendix id=\"$apx\">(.+?)</appendix>}
+              {}gs;
+
+    # Skip to next appendix regex if the regex did not match anything
+    next unless (defined $&);
+    
+    msg ("...Building list of removed nodes...");
+    
+    # Split the last bracketed regex match into an array
+    # Extract the node names from the tags and push them into an array
+    foreach (split "\n", $&) {
+        push @nodes, $1 if /<\w+ id=\"(.+?)\">/
+    }
+}
 
 # 2002-02-22 arjen@mysql.com (added fix " /" to end of regex, to make it match)
-print STDERR "Fixing references to removed nodes...\n";
-foreach $node (@nodes) {
-  $web = $node;
-  $web =~ s/[ ]/_/;
-  $web = "http://www.mysql.com/doc/" .
-         (join "/", (split //, $web)[0..1])."/$web.html";
-  print STDERR "$node -> $web\n";
-  $data =~ s{<(\w+) linkend=\"$node\" />}
-            {$web}gs;
-};
+msg ("Fixing references to removed nodes...");
+# Merge the list of node names into a set of regex alternations
+$nodes = join "|", @nodes;
+
+# Find all references to removed nodes and convert them to absolute URLs
+$data =~ s{<\w+ linkend="($nodes)" />}
+          {&xref2link($1)}ges;
 
 print STDOUT $data;
+exit;
+
+#
+# Definitions for helper sub-routines
+#
+
+sub msg {
+    print STDERR shift, "\n";
+}
+
+sub strip_tag($$) {
+    (my $str, my $tag) = @_;
+    $str =~ s{<$tag>(.+?)</$tag>}{$1}gs;
+    return $str;
+}
+
+sub underscore2hyphen($) {
+    my $str = shift;
+    $str =~ tr/_/-/;
+    return $str;
+}
+
+sub xref2link {
+    my $ref = shift;
+    $ref =~ tr/ /_/;
+    $ref =~ s{^((.)(.).+)$}{$2/$3/$1.html};
+    return "http://www.mysql.com/doc/" . $ref;
+}
+
+# We might need to encode the high-bit characters to ensure proper representation
+# msg ("Converting high-bit characters to entities");
+# $data =~ s/([\200-\400])/&get_entity($1)>/gs;
+# There is no get_entity function yet - no point writing it til we need it :)

Docs/Support/docbook-split

-#! /usr/local/bin/perl
+#! /usr/bin/perl -w
 # O'Reilly's Perl script to chop mysql.xml into separate ch/apps/index files.
 # The indexes are actually not used, they're created straight from the xrefs.
-
-use strict;
-
 # Breaks the MySQL reference manual into chapters, appendices, and indexes.
 
-my $input_file;
-my $directory;
-my $chap_num;
-my $app_letter;
-my $start_text;
-my $line;
-my $input_file;
-my $output_name;
-
-$input_file = "mysql.xml";
-$directory="chaps_apps_index";
-$chap_num=1;       # Start chapter numbers at one (there is no preface)
-$app_letter="a";   # Start appendix letters at "a"
-$start_text="";
-$line="";
-
-open (INPUT_FILE, '<' . $input_file) or die "Cannot open $input_file";
-
-if (-d $directory) {
-    my $unlinked = unlink <$directory/*>;
-    printf(Removed "%d files\n", $unlinked);
-}
-else {
-    mkdir $directory or die "Cannot make $directory subdirectory";
-}
+use strict;
 
-while (1) {
+my $app_letter      = "a";                                  # Start appendix letters at "a"
+my $chap_num        = 1;                                    # Start chapter numbers at one (there is no preface)
+my $directory       = "mysql_refman_" . time;
+my $ext             = ".xml";
+my $line            = "";
+my $output_name     = "";
+my $start_text      = "";
 
-    # Terminating statement for loop.
-    exit if not defined $line;
+mkdir $directory unless -d $directory;
 
-    if ($line =~ /(?:.*)(<chapter.*)/i ) {
+while (defined $line) {
+    if ($line =~ /(<chapter.+)/i ) {
         $start_text = $1;
-        $output_name = &make_chapter_name($chap_num);
-        $chap_num++;
+        $output_name = sprintf("ch%02d%s", $chap_num, $ext);
+        ++$chap_num;
         &process_file("chapter");
     }
-    elsif ($line =~ /(?:.*)(<appendix.*)/i ) {
+    elsif ($line =~ /(<appendix.+)/i ) {
         $start_text = $1 ;
-        $output_name = &make_appendix_name($app_letter);
-        $app_letter++;
+        $output_name = "app$app_letter$ext";
+        ++$app_letter;
         &process_file("appendix");
     }
-    elsif ($line =~ /(?:.*)(<index\s+id=")(.*?)(">.*)/i ) {
+    elsif ($line =~ /(<index\s+id=")(.*?)(">.*)/i ) {
         $start_text = $1 . $2 . $3;
-        $output_name = lc($2) . ".xml";
+        $output_name = lc($2) . $ext;
         &process_file("index");
     }
     else {
-        # Automatically skips junk in between chapters, appendices,
-        # and indexes.
-        $line = <INPUT_FILE>;
+        # Skip junk in between chapters, appendices and indexes.
+        $line = <>;
     }
 }
 
-sub make_chapter_name {
-    my $num = shift;
-    my $name = "ch" . sprintf("%02d", $num) . ".xml";
-    return $name;
-}
+sub process_file {
+    my $marker  = shift;
+    my $path    = "$directory/$output_name";
 
-sub make_appendix_name {
-    my $letter = shift;
-    my $name = "app" . sprintf("%s", $letter) . ".xml";
-    return $name;
-}
+    open (OUTPUT_FILE, ">$path") or die "Cannot open $path";
 
-sub process_file {
-    my $marker=shift;
-    open (OUTPUT_FILE, '>' . $directory . "/" . $output_name) or
-        die "Cannot open $output_name";
+    print STDERR "Creating $path\n";
+
+    # Print out XML PI
+    print OUTPUT_FILE "<?xml version='1.0' encoding='ISO-8859-1'?>\n";
+   
     # Print whatever happened to appear at the end of the previous chapter.
-    print OUTPUT_FILE $start_text . "\n" if $start_text;
-    while (1) {
-        $line = <INPUT_FILE>;
-        exit if not defined $line;
+    print OUTPUT_FILE "$start_text\n" if $start_text;
+    
+    while (defined $line) {
+        $line = <>;
+
         # Note: Anything after the terminating marker is lost, just like
         # lines in between chapters.
         if ($line =~ /(.*<\/\s*$marker\s*>)/i ) {
-            print OUTPUT_FILE $1 . "\n" if $1;
+            print OUTPUT_FILE "$1\n" if $1;
             close OUTPUT_FILE;
             return;
         }

Docs/Support/make-docbook

@@ -18,3 +18,7 @@
     
         # See if the XML output is well-formed
         xmlwf mysql.xml
+
+        # If all is well, keep processing
+        cat mysql.xml | Support/colspec-fix.pl | Support/docbook-split;
+

Docs/manual.texi

@@ -757,10 +757,9 @@ Large server clusters using replication are in production use, with
 good results. Work on enhanced replication features is continuing
 in @code{MySQL} 4.0.
 
-@item @code{InnoDB} tables -- Stable (in 3.23 from 3.23.47)
+@item @code{InnoDB} tables -- Stable (in 3.23 from 3.23.49)
 The @code{InnoDB} transactional table handler has now been declared
-stable in the @code{MySQL} 3.23 development tree, starting from
-version 3.23.47.
+stable in the @code{MySQL} 3.23 tree, starting from version 3.23.49.
 @code{InnoDB} is being used in large, heavy load production systems.
 
 @item @code{BDB} tables -- Gamma

Docs/mirrors.texi

@@ -291,6 +291,11 @@ WWW (@uref{http://mysql.tecnoera.com/})
 @image{Flags/chile} Chile [Vision] @@
 WWW (@uref{http://mysql.vision.cl/})
 
+@item
+@image{Flags/costarica} Costa Rica [Ogmios Communications] @@
+WWW (@uref{http://mysql.ogmios.co.cr/})
+FTP (@uref{ftp://mysql.ogmios.co.cr/pub/mysql/})
+
 @end itemize
 
 @strong{Asia:}

libmysql/libmysql.c

@@ -737,7 +737,7 @@ static void mysql_read_default_options(struct st_mysql_options *options,
 	  *end=0;				/* Remove '=' */
 	}
 	/* Change all '_' in variable name to '-' */
-	for (end= *option ; (end= strcend(end,'_')) ; )
+	for (end= *option ; (end= strcend(end,'_')) && *end ; )
 	  *end= '-';
 	switch (find_type(*option+2,&option_types,2)) {
 	case 1:				/* port */

mysql-test/r/union.result

@@ -86,6 +86,21 @@ explain select a,b from t1 union all select a,b from t2;
 table	type	possible_keys	key	key_len	ref	rows	Extra
 t1	ALL	NULL	NULL	NULL	NULL	4	
 t2	ALL	NULL	NULL	NULL	NULL	4	
+explain select xx from t1 union select 1;
+Unknown column 'xx' in 'field list'
+explain select a,b from t1 union select 1;
+table	type	possible_keys	key	key_len	ref	rows	Extra
+t1	ALL	NULL	NULL	NULL	NULL	4	
+				0		0	No tables used
+explain select 1 union select a,b from t1 union select 1;
+table	type	possible_keys	key	key_len	ref	rows	Extra
+				0		0	No tables used
+t1	ALL	NULL	NULL	NULL	NULL	4	
+				0		0	No tables used
+explain select a,b from t1 union select 1 limit 0;
+table	type	possible_keys	key	key_len	ref	rows	Extra
+t1	ALL	NULL	NULL	NULL	NULL	4	
+				0		0	Impossible WHERE
 select a,b from t1 into outfile 'skr' union select a,b from t2;
 Wrong usage of UNION and INTO
 select a,b from t1 order by a union select a,b from t2;

mysql-test/t/union.test

@@ -24,6 +24,12 @@ select 't1',b,count(*) from t1 group by b UNION select 't2',b,count(*) from t2 g
 # Test some error conditions with UNION
 explain select a,b from t1 union all select a,b from t2;
 
+--error  1054
+explain select xx from t1 union select 1;
+explain select a,b from t1 union select 1;
+explain select 1 union select a,b from t1 union select 1;
+explain select a,b from t1 union select 1 limit 0;
+
 --error 1221
 select a,b from t1 into outfile 'skr' union select a,b from t2;
 

sql/sql_select.cc

@@ -6964,13 +6964,16 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
 {
   List<Item> field_list;
   Item *item;
+  List<Item> item_list;
   THD *thd=join->thd;
+  MYSQL_LOCK *save_lock;
   SELECT_LEX *select_lex = &(join->thd->lex.select_lex);
+  select_result *result=join->result;
   DBUG_ENTER("select_describe");
 
   /* Don't log this into the slow query log */
   select_lex->options&= ~(QUERY_NO_INDEX_USED | QUERY_NO_GOOD_INDEX_USED);
-  if (join->thd->lex.select == select_lex)
+  if (thd->lex.select == select_lex)
   {
     field_list.push_back(new Item_empty_string("table",NAME_LEN));
     field_list.push_back(new Item_empty_string("type",10));
@@ -6986,24 +6989,22 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
     item->maybe_null=1;
     field_list.push_back(new Item_real("rows",0.0,0,10));
     field_list.push_back(new Item_empty_string("Extra",255));
-    if (send_fields(thd,field_list,1))
+    if (result->send_fields(field_list,1))
       return;
   }
-  char buff[512],*buff_ptr;
-  String tmp(buff,sizeof(buff)),*packet= &thd->packet;
+
   if (message)
   {
-    packet->length(0);
-    net_store_null(packet);
-    net_store_null(packet);
-    net_store_null(packet);
-    net_store_null(packet);
-    net_store_null(packet);
-    net_store_null(packet);
-    net_store_null(packet);
-    net_store_data(packet,message,strlen(message));
-    if (my_net_write(&thd->net,(char*) packet->ptr(),packet->length()))
-      DBUG_VOID_RETURN;
+    item_list.push_back(new Item_empty_string("",0));
+    item_list.push_back(new Item_empty_string("",0));
+    item_list.push_back(new Item_empty_string("",0));
+    item_list.push_back(new Item_empty_string("",0));
+    item_list.push_back(new Item_empty_string("",0));
+    item_list.push_back(new Item_empty_string("",0));
+    item_list.push_back(new Item_empty_string("",0));
+    item_list.push_back(new Item_string(message,strlen(message)));
+    if (result->send_data(item_list))
+      result->send_error(0,NullS);
   }
   else
   {
@@ -7012,69 +7013,70 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
     {
       JOIN_TAB *tab=join->join_tab+i;
       TABLE *table=tab->table;
-      
+      char buff[512],*buff_ptr=buff;
+      char buff1[512], buff2[512], bufff[512];
+      String tmp1(buff1,sizeof(buff1));
+      String tmp2(buff2,sizeof(buff2));
+      item_list.empty();
       if (tab->type == JT_ALL && tab->select && tab->select->quick)
 	tab->type= JT_RANGE;
-      packet->length(0);
-      net_store_data(packet,table->table_name);
-      net_store_data(packet,join_type_str[tab->type]);
-      tmp.length(0);
+      item_list.push_back(new Item_string(table->table_name,strlen(table->table_name)));
+      item_list.push_back(new Item_string(join_type_str[tab->type],strlen(join_type_str[tab->type])));
+      tmp1.length(0); tmp2.length(0);
       key_map bits;
       uint j;
       for (j=0,bits=tab->keys ; bits ; j++,bits>>=1)
       {
 	if (bits & 1)
 	{
-	  if (tmp.length())
-	    tmp.append(',');
-	  tmp.append(table->key_info[j].name);
+	  if (tmp1.length())
+	    tmp1.append(',');
+	  tmp1.append(table->key_info[j].name);
 	}
       }
-      if (tmp.length())
-	net_store_data(packet,tmp.ptr(),tmp.length());
+      if (tmp1.length())
+	item_list.push_back(new Item_string(tmp1.ptr(),tmp1.length()));
       else
-	net_store_null(packet);
+	item_list.push_back(new Item_null());
       if (tab->ref.key_parts)
       {
-	net_store_data(packet,table->key_info[tab->ref.key].name);
-	net_store_data(packet,(uint32) tab->ref.key_length);
-	tmp.length(0);
+	item_list.push_back(new Item_string(table->key_info[tab->ref.key].name,strlen(table->key_info[tab->ref.key].name)));
+	item_list.push_back(new Item_int((int) tab->ref.key_length));
 	for (store_key **ref=tab->ref.key_copy ; *ref ; ref++)
 	{
-	  if (tmp.length())
-	    tmp.append(',');
-	  tmp.append((*ref)->name());
+	  if (tmp2.length())
+	    tmp2.append(',');
+	  tmp2.append((*ref)->name());
 	}
-	net_store_data(packet,tmp.ptr(),tmp.length());
+	item_list.push_back(new Item_string(tmp2.ptr(),tmp2.length()));
       }
       else if (tab->type == JT_NEXT)
       {
-	net_store_data(packet,table->key_info[tab->index].name);
-	net_store_data(packet,(uint32) table->key_info[tab->index].key_length);
-	net_store_null(packet);
+	item_list.push_back(new Item_string(table->key_info[tab->index].name,strlen(table->key_info[tab->index].name)));
+	item_list.push_back(new Item_int((int) table->key_info[tab->index].key_length));
+	item_list.push_back(new Item_null());
       }
       else if (tab->select && tab->select->quick)
       {
-	net_store_data(packet,table->key_info[tab->select->quick->index].name);;
-	net_store_data(packet,(uint32) tab->select->quick->max_used_key_length);
-	net_store_null(packet);
+	item_list.push_back(new Item_string(table->key_info[tab->select->quick->index].name,strlen(table->key_info[tab->select->quick->index].name)));
+	item_list.push_back(new Item_int((int) tab->select->quick->max_used_key_length));
+	item_list.push_back(new Item_null());
       }
       else
       {
-	net_store_null(packet);
-	net_store_null(packet);
-	net_store_null(packet);
+	item_list.push_back(new Item_null());
+	item_list.push_back(new Item_null());
+	item_list.push_back(new Item_null());
       }
-      sprintf(buff,"%.0f",join->best_positions[i].records_read);
-      net_store_data(packet,buff);
+      sprintf(bufff,"%.0f",join->best_positions[i].records_read);
+      item_list.push_back(new Item_string(bufff,strlen(bufff)));
       my_bool key_read=table->key_read;
       if (tab->type == JT_NEXT &&
 	  ((table->used_keys & ((key_map) 1 << tab->index))))
 	key_read=1;
       
-      buff_ptr=buff;
       if (tab->info)
-	net_store_data(packet,tab->info);
+	item_list.push_back(new Item_string(tab->info,strlen(tab->info)));
       else if (tab->select)
       {
 	if (tab->use_quick == 2)
@@ -7128,16 +7130,20 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
 	}
 	buff_ptr=strmov(buff_ptr,"Distinct");
       }
-      net_store_data(packet,buff,(uint) (buff_ptr - buff));
-      if (my_net_write(&thd->net,(char*) packet->ptr(),packet->length()))
-	DBUG_VOID_RETURN;				/* Purecov: Inspected */
-
+      item_list.push_back(new Item_string(buff,(uint) (buff_ptr - buff)));
       // For next iteration
       used_tables|=table->map;
+      if (result->send_data(item_list))
+	result->send_error(0,NullS);
     }
   }
   if (!join->thd->lex.select->next)
-    send_eof(&thd->net);
+  {
+    save_lock=thd->lock;
+    thd->lock=(MYSQL_LOCK *)0;
+    result->send_eof();
+    thd->lock=save_lock;
+  }
   DBUG_VOID_RETURN;
 }
 

sql/sql_union.cc

@@ -31,10 +31,11 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
   ORDER *order;
   List<Item> item_list;
   TABLE *table;
+  int describe=(lex->select_lex.options & SELECT_DESCRIBE) ? 1 : 0;
+  int res;
   TABLE_LIST result_table_list;
   TMP_TABLE_PARAM tmp_table_param;
   select_union *union_result;
-  int res;
   DBUG_ENTER("mysql_union");
 
   /* Fix tables 'to-be-unioned-from' list to point at opened tables */
@@ -70,33 +71,26 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
     lex_sl=0;
     order=0;
   }
-
-  if (lex->select_lex.options & SELECT_DESCRIBE)
+  
+  if (describe)
   {
-    for (sl= &lex->select_lex; sl; sl=sl->next)
-    {
-      lex->select=sl;
-      thd->offset_limit=sl->offset_limit;
-      thd->select_limit=sl->select_limit+sl->offset_limit;
-      if (thd->select_limit < sl->select_limit)
-	thd->select_limit= HA_POS_ERROR;		// no limit
-      if (thd->select_limit == HA_POS_ERROR)
-	sl->options&= ~OPTION_FOUND_ROWS;
-      res=mysql_select(thd, (TABLE_LIST*) sl->table_list.first,
-		       sl->item_list,
-		       sl->where,
-		       ((sl->braces) ?
-			(ORDER *) sl->order_list.first : (ORDER *) 0),
-		       (ORDER*) sl->group_list.first,
-		       sl->having,
-		       (ORDER*) NULL,
-		       (sl->options | thd->options | SELECT_NO_UNLOCK |
-			SELECT_DESCRIBE),
-		       result);
-    }
-    DBUG_RETURN(0);
+    Item *item;
+    item_list.push_back(new Item_empty_string("table",NAME_LEN));
+    item_list.push_back(new Item_empty_string("type",10));
+    item_list.push_back(item=new Item_empty_string("possible_keys",
+						  NAME_LEN*MAX_KEY));
+    item->maybe_null=1;
+    item_list.push_back(item=new Item_empty_string("key",NAME_LEN));
+    item->maybe_null=1;
+    item_list.push_back(item=new Item_int("key_len",0,3));
+    item->maybe_null=1;
+    item_list.push_back(item=new Item_empty_string("ref",
+						    NAME_LEN*MAX_REF_PARTS));
+    item->maybe_null=1;
+    item_list.push_back(new Item_real("rows",0.0,0,10));
+    item_list.push_back(new Item_empty_string("Extra",255));
   }
-
+  else
   {
     Item *item;
     List_iterator<Item> it(lex->select_lex.item_list);
@@ -113,7 +107,7 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
   bzero((char*) &tmp_table_param,sizeof(tmp_table_param));
   tmp_table_param.field_count=item_list.elements;
   if (!(table=create_tmp_table(thd, &tmp_table_param, item_list,
-			       (ORDER*) 0, !lex->union_option,
+			       (ORDER*) 0, !describe & !lex->union_option,
 			       1, 0,
 			       (lex->select_lex.options | thd->options |
 				TMP_TABLE_ALL_COLUMNS))))
@@ -130,7 +124,9 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
     res= -1;
     goto exit;
   }
-  for (sl= &lex->select_lex; sl; sl=sl->next)
+  union_result->save_time_stamp=!describe;
+
+  for (sl=&lex->select_lex;sl;sl=sl->next)
   {
     thd->offset_limit=sl->offset_limit;
     thd->select_limit=sl->select_limit+sl->offset_limit;
@@ -146,7 +142,7 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
 		     (ORDER*) sl->group_list.first,
 		     sl->having,
 		     (ORDER*) NULL,
-		     sl->options | thd->options | SELECT_NO_UNLOCK,
+		     sl->options | thd->options | SELECT_NO_UNLOCK | ((describe) ? SELECT_DESCRIBE : 0),
 		     union_result);
     if (res)
       goto exit;
@@ -187,6 +183,8 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
 	if (thd->select_limit == HA_POS_ERROR)
 	  thd->options&= ~OPTION_FOUND_ROWS;
       }
+      if (describe)
+	thd->select_limit= HA_POS_ERROR;		// no limit
       res=mysql_select(thd,&result_table_list,
 		       item_list, NULL, /*ftfunc_list,*/ order,
 		       (ORDER*) NULL, NULL, (ORDER*) NULL,
@@ -222,7 +220,7 @@ select_union::~select_union()
 
 int select_union::prepare(List<Item> &list)
 {
-  if (list.elements != table->fields)
+  if (save_time_stamp && list.elements != table->fields)
   {
     my_message(ER_WRONG_NUMBER_OF_COLUMNS_IN_SELECT,
 	       ER(ER_WRONG_NUMBER_OF_COLUMNS_IN_SELECT),MYF(0));

sql/sql_yacc.yy

@@ -1928,7 +1928,7 @@ opt_else:
 	| ELSE expr    { $$= $2; }
 
 when_list:
-        { Select->when_list.push_front(new List<Item>) }
+        { Select->when_list.push_front(new List<Item>); }
 	when_list2
 	{ $$= Select->when_list.pop(); }
 
@@ -2031,7 +2031,7 @@ opt_key_definition:
 	  }
 
 key_usage_list:
-	key_or_index { Select->interval_list.empty() } '(' key_usage_list2 ')'
+	key_or_index { Select->interval_list.empty(); } '(' key_usage_list2 ')'
         { $$= &Select->interval_list; }
 
 key_usage_list2:
@@ -2637,7 +2637,7 @@ describe:
 	    YYABORT;
 	}
 	opt_describe_column
-	| describe_command select { Lex->select_lex.options|= SELECT_DESCRIBE };
+	| describe_command select { Lex->select_lex.options|= SELECT_DESCRIBE; }
 
 
 describe_command:
@@ -3077,7 +3077,7 @@ set:
 	  lex->select->select_limit=lex->thd->default_select_limit;
 	  lex->tx_isolation=lex->thd->tx_isolation;
 	  lex->option_type=0;
-	  lex->option_list.empty()
+	  lex->option_list.empty();
 	}
 	option_value_list