Added option --expose_dd_tables

The new option allow you to show and use MySQL 8.0
data dictionary hidden tables.
It requires mysqld-debug to be available

Author: datacharmer

Changelog

@@ -1,3 +1,6 @@
+3.2.08	27-Apr-2017
+	- Added option --expose_dd_tables to show and use MySQL 8.0
+	  data dictionary hidden tables.
 3.2.07	21-Apr-2017
 	- Changed detection of USER variable to pass tests in unfriendly
 	  environments

bin/low_level_make_sandbox

@@ -161,6 +161,34 @@ else
     die "# Can't get MySQL version from mysql_config\n";
 }
 
+$msb->{options}{custom_mysqld} = '';
+if ($msb->{options}{expose_dd_tables})
+{
+    my $mysql_version = $msb->{options}{detected_mysql_version};
+    my ( $major, undef, undef) = split_version($mysql_version);
+    if ( $major != '8')
+    {
+        die "The option 'expose_dd_tables' can only be used with version 8\n";
+    }
+    my $executable = sprintf '%s/bin/mysqld-debug', $msb->{options}{basedir} ;
+    unless ( -x $executable)
+    {
+        die "mysqld-debug not found in $msb->{options}{basedir}/bin\n"
+    }
+    $msb->{options}{custom_mysqld} = 'mysqld-debug';
+    unless ($msb->{options}{post_grants_sql}) 
+    {
+        $msb->{options}{post_grants_sql} = ''; 
+    }
+
+    $msb->{options}{post_grants_sql} = 
+            "set persist debug='+d,skip_dd_table_access_check';
+            create table sys.dd_hidden_tables select id, name, schema_id from mysql.tables where hidden=1;
+            update mysql.tables set hidden=0 where hidden=1;
+            "
+            . $msb->{options}{post_grants_sql}; 
+}
+
 if ($msb->{options}{'gtid'})
 {
     my $mysql_version = $msb->{options}{detected_mysql_version};
@@ -326,6 +354,7 @@ my %replace_options = (
     _MSB_VERSION_       =>  'msb_version',
     _LOWER_CASE_TABLE_NAMES_ => 'lower_case_table_names',
     _HISTORY_DIR_       => 'history_dir',
+    _CUSTOM_MYSQLD_     => 'custom_mysqld',
 );
 
 $msb->{options}{msb_version} = $MySQL::Sandbox::VERSION;

lib/MySQL/Sandbox.pm

@@ -30,7 +30,7 @@ our @EXPORT_OK= qw( is_port_open
                     split_version
                     ) ;
 
-our $VERSION=q{3.2.07};
+our $VERSION=q{3.2.08};
 our $DEBUG;
 
 BEGIN {

lib/MySQL/Sandbox/Recipes.pm

@@ -3,7 +3,7 @@ package MySQL::Sandbox::Recipes;
 use strict;
 use warnings;
 
-our $VERSION=q{3.2.07};
+our $VERSION=q{3.2.08};
 
 1;
 __END__

lib/MySQL/Sandbox/Scripts.pm

@@ -17,7 +17,7 @@ our @EXPORT_OK = qw(
     );
 our @EXPORT = @EXPORT_OK;
 
-our $VERSION=q{3.2.07};
+our $VERSION=q{3.2.08};
 
 our @MANIFEST = (
 'clear.sh',
@@ -447,6 +447,26 @@ my %parse_options_low_level_make_sandbox = (
                                             'Sets port for X-plugin (requires --plugin_mysqlx)',
                                          ]
                             },
+    custom_mysqld => {
+                                value => $ENV{'CUSTOM_MYSQLD'},      
+                                parse => 'custom_mysqld', 
+                                so    => 198,
+                                export => 1,
+                                help  => [
+                                            'uses alternative mysqld ',
+                                            '(must be in the same directory as the regular mysqld)'
+                                         ]
+                            },
+     expose_dd_tables => {
+                                value => $ENV{'EXPOSE_DD_TABLES'},      
+                                parse => 'expose_dd_tables', 
+                                so    => 197,
+                                export => 1,
+                                help  => [
+                                            'Exposed MySQL 8.0.x data dictionary tables',
+                                         ]
+                            },
+ 
      prompt_prefix           => {
                                 value => 'mysql',      
                                 parse => 'prompt_prefix=s', 
@@ -1244,6 +1264,11 @@ export DYLD_LIBRARY_PATH=$BASEDIR_/lib:$BASEDIR/lib/mysql:$DYLD_LIBRARY_PATH
 MYSQLD_SAFE="bin/_MYSQLDSAFE_"
 SBDIR="_HOME_DIR_/_SANDBOXDIR_"
 PIDFILE="$SBDIR/data/mysql_sandbox_SERVERPORT_.pid"
+CUSTOM_MYSQLD=_CUSTOM_MYSQLD_
+if [ -n "$CUSTOM_MYSQLD" ]
+then
+    CUSTOM_MYSQLD="--mysqld=$CUSTOM_MYSQLD"
+fi
 __SBINSTR_SH__
 if [ ! -f $BASEDIR/$MYSQLD_SAFE ]
 then
@@ -1286,9 +1311,9 @@ else
     cd $BASEDIR
     if [ "$SBDEBUG" = "" ]
     then
-        $MYSQLD_SAFE --defaults-file=$SBDIR/my.sandbox.cnf $@ > /dev/null 2>&1 &
+        $MYSQLD_SAFE --defaults-file=$SBDIR/my.sandbox.cnf $CUSTOM_MYSQLD $@ > /dev/null 2>&1 &
     else
-        $MYSQLD_SAFE --defaults-file=$SBDIR/my.sandbox.cnf $@ > "$SBDIR/start.log" 2>&1 &
+        $MYSQLD_SAFE --defaults-file=$SBDIR/my.sandbox.cnf $CUSTOM_MYSQLD $@ > "$SBDIR/start.log" 2>&1 &
     fi
     cd $CURDIR
     ATTEMPTS=1