-- Copyright (c) 2003, 2023, Oracle and/or its affiliates.
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License, version 2.0,
-- as published by the Free Software Foundation.
--
-- This program is also distributed with certain software (including
-- but not limited to OpenSSL) that is licensed under separate terms,
-- as designated in a particular file or component or in included license
-- documentation.  The authors of MySQL hereby grant you an additional
-- permission to link the program and your derivative works with the
-- separately licensed software that they have included with MySQL.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-- GNU General Public License, version 2.0, for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program; if not, write to the Free Software
-- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA

# This part converts any old privilege tables to privilege tables suitable
# for current version of MySQL

# You can safely ignore all 'Duplicate column' and 'Unknown column' errors
# because these just mean that your tables are already up to date.
# This script is safe to run even if your tables are already up to date!

# Warning message(s) produced for a statement can be printed by explicitly
# adding a 'SHOW WARNINGS' after the statement.

set sql_mode='';
set default_storage_engine=MyISAM;

# Move distributed grant tables to default engine during upgrade, remember
# which tables was moved so they can be moved back after upgrade
SET @had_distributed_user =
  (SELECT COUNT(table_name) FROM information_schema.tables
     WHERE table_schema = 'mysql' AND table_name = 'user' AND
           table_type = 'BASE TABLE' AND engine = 'NDBCLUSTER');
SET @cmd="ALTER TABLE mysql.user ENGINE=MyISAM";
SET @str = IF(@had_distributed_user > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @had_distributed_db =
  (SELECT COUNT(table_name) FROM information_schema.tables
     WHERE table_schema = 'mysql' AND table_name = 'db' AND
           table_type = 'BASE TABLE' AND engine = 'NDBCLUSTER');
SET @cmd="ALTER TABLE mysql.db ENGINE=MyISAM";
SET @str = IF(@had_distributed_db > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @had_distributed_tables_priv =
  (SELECT COUNT(table_name) FROM information_schema.tables
     WHERE table_schema = 'mysql' AND table_name = 'tables_priv' AND
           table_type = 'BASE TABLE' AND engine = 'NDBCLUSTER');
SET @cmd="ALTER TABLE mysql.tables_priv ENGINE=MyISAM";
SET @str = IF(@had_distributed_tables_priv > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @had_distributed_columns_priv =
  (SELECT COUNT(table_name) FROM information_schema.tables
     WHERE table_schema = 'mysql' AND table_name = 'columns_priv' AND
           table_type = 'BASE TABLE' AND engine = 'NDBCLUSTER');
SET @cmd="ALTER TABLE mysql.columns_priv ENGINE=MyISAM";
SET @str = IF(@had_distributed_columns_priv > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @had_distributed_procs_priv =
  (SELECT COUNT(table_name) FROM information_schema.tables
     WHERE table_schema = 'mysql' AND table_name = 'procs_priv' AND
           table_type = 'BASE TABLE' AND engine = 'NDBCLUSTER');
SET @cmd="ALTER TABLE mysql.procs_priv ENGINE=MyISAM";
SET @str = IF(@had_distributed_procs_priv > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @had_distributed_proxies_priv =
  (SELECT COUNT(table_name) FROM information_schema.tables
     WHERE table_schema = 'mysql' AND table_name = 'proxies_priv' AND
           table_type = 'BASE TABLE' AND engine = 'NDBCLUSTER' );
SET @cmd="ALTER TABLE mysql.proxies_priv ENGINE=MyISAM";
SET @str = IF(@had_distributed_proxies_priv > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

ALTER TABLE user add File_priv enum('N','Y') COLLATE utf8_general_ci NOT NULL;

# Detect whether or not we had the Grant_priv column
SET @hadGrantPriv:=0;
SELECT @hadGrantPriv:=1 FROM user WHERE Grant_priv LIKE '%';

ALTER TABLE user add Grant_priv enum('N','Y') COLLATE utf8_general_ci NOT NULL,add References_priv enum('N','Y') COLLATE utf8_general_ci NOT NULL,add Index_priv enum('N','Y') COLLATE utf8_general_ci NOT NULL,add Alter_priv enum('N','Y') COLLATE utf8_general_ci NOT NULL;
ALTER TABLE db add Grant_priv enum('N','Y') COLLATE utf8_general_ci NOT NULL,add References_priv enum('N','Y') COLLATE utf8_general_ci NOT NULL,add Index_priv enum('N','Y') COLLATE utf8_general_ci NOT NULL,add Alter_priv enum('N','Y') COLLATE utf8_general_ci NOT NULL;

# Fix privileges for old tables
UPDATE user SET Grant_priv=File_priv,References_priv=Create_priv,Index_priv=Create_priv,Alter_priv=Create_priv WHERE @hadGrantPriv = 0;
UPDATE db SET References_priv=Create_priv,Index_priv=Create_priv,Alter_priv=Create_priv WHERE @hadGrantPriv = 0;

#
# The second alter changes ssl_type to new 4.0.2 format
# Adding columns needed by GRANT .. REQUIRE (openssl)

ALTER TABLE user
ADD ssl_type enum('','ANY','X509', 'SPECIFIED') COLLATE utf8_general_ci NOT NULL,
ADD ssl_cipher BLOB NOT NULL,
ADD x509_issuer BLOB NOT NULL,
ADD x509_subject BLOB NOT NULL;
ALTER TABLE user MODIFY ssl_type enum('','ANY','X509', 'SPECIFIED') NOT NULL;

#
# tables_priv
#
ALTER TABLE tables_priv
  ADD KEY Grantor (Grantor);

ALTER TABLE tables_priv
  MODIFY Host char(60) NOT NULL default '',
  MODIFY Db char(64) NOT NULL default '',
  MODIFY User char(32) NOT NULL default '',
  MODIFY Table_name char(64) NOT NULL default '',
  ENGINE=MyISAM,
  CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;

ALTER TABLE tables_priv
  MODIFY Column_priv set('Select','Insert','Update','References')
    COLLATE utf8_general_ci DEFAULT '' NOT NULL,
  MODIFY Table_priv set('Select','Insert','Update','Delete','Create',
                        'Drop','Grant','References','Index','Alter',
                        'Create View','Show view','Trigger')
    COLLATE utf8_general_ci DEFAULT '' NOT NULL,
  COMMENT='Table privileges';

ALTER TABLE tables_priv
  MODIFY Grantor char(93) NOT NULL default '';

#
# columns_priv
#
#
# Name change of Type -> Column_priv from MySQL 3.22.12
#
ALTER TABLE columns_priv
  CHANGE Type Column_priv set('Select','Insert','Update','References')
    COLLATE utf8_general_ci DEFAULT '' NOT NULL;

ALTER TABLE columns_priv
  MODIFY Host char(60) NOT NULL default '',
  MODIFY Db char(64) NOT NULL default '',
  MODIFY User char(32) NOT NULL default '',
  MODIFY Table_name char(64) NOT NULL default '',
  MODIFY Column_name char(64) NOT NULL default '',
  ENGINE=MyISAM,
  CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin,
  COMMENT='Column privileges';

ALTER TABLE columns_priv
  MODIFY Column_priv set('Select','Insert','Update','References')
    COLLATE utf8_general_ci DEFAULT '' NOT NULL;

#
#  Add the new 'type' column to the func table.
#

ALTER TABLE func add type enum ('function','aggregate') COLLATE utf8_general_ci NOT NULL;

#
#  Change the user and db tables to current format
#

# Detect whether we had Show_db_priv
SET @hadShowDbPriv:=0;
SELECT @hadShowDbPriv:=1 FROM user WHERE Show_db_priv LIKE '%';

ALTER TABLE user
ADD Show_db_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Alter_priv,
ADD Super_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Show_db_priv,
ADD Create_tmp_table_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Super_priv,
ADD Lock_tables_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Create_tmp_table_priv,
ADD Execute_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Lock_tables_priv,
ADD Repl_slave_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Execute_priv,
ADD Repl_client_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Repl_slave_priv;

# Convert privileges so that users have similar privileges as before

UPDATE user SET Show_db_priv= Select_priv, Super_priv=Process_priv, Execute_priv=Process_priv, Create_tmp_table_priv='Y', Lock_tables_priv='Y', Repl_slave_priv=file_priv, Repl_client_priv=File_priv where user<>"" AND @hadShowDbPriv = 0;


#  Add fields that can be used to limit number of questions and connections
#  for some users.

ALTER TABLE user
ADD max_questions int(11) NOT NULL DEFAULT 0 AFTER x509_subject,
ADD max_updates   int(11) unsigned NOT NULL DEFAULT 0 AFTER max_questions,
ADD max_connections int(11) unsigned NOT NULL DEFAULT 0 AFTER max_updates;

#
# Update proxies_priv definition.
#
ALTER TABLE proxies_priv MODIFY User char(32) binary DEFAULT '' NOT NULL;
ALTER TABLE proxies_priv MODIFY Proxied_user char(32) binary DEFAULT '' NOT NULL;
ALTER TABLE proxies_priv MODIFY Grantor char(93) DEFAULT '' NOT NULL;

#
#  Add Create_tmp_table_priv and Lock_tables_priv to db
#

ALTER TABLE db
ADD Create_tmp_table_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
ADD Lock_tables_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL;

alter table user change max_questions max_questions int(11) unsigned DEFAULT 0  NOT NULL;


alter table db comment='Database privileges';
alter table user comment='Users and global privileges';
alter table func comment='User defined functions';

# Convert all tables to UTF-8 with binary collation
# and reset all char columns to correct width
ALTER TABLE user
  MODIFY Host char(60) NOT NULL default '',
  MODIFY User char(32) NOT NULL default '',
  ENGINE=MyISAM, CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;
ALTER TABLE user
  MODIFY Select_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Insert_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Update_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Delete_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Create_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Drop_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Reload_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Shutdown_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Process_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY File_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Grant_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY References_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Index_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Alter_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Show_db_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Super_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Create_tmp_table_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Lock_tables_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Execute_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Repl_slave_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY Repl_client_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY ssl_type enum('','ANY','X509', 'SPECIFIED') COLLATE utf8_general_ci DEFAULT '' NOT NULL;

ALTER TABLE db
  MODIFY Host char(60) NOT NULL default '',
  MODIFY Db char(64) NOT NULL default '',
  MODIFY User char(32) NOT NULL default '',
  ENGINE=MyISAM, CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;
ALTER TABLE db
  MODIFY  Select_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY  Insert_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY  Update_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY  Delete_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY  Create_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY  Drop_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY  Grant_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY  References_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY  Index_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY  Alter_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY  Create_tmp_table_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL,
  MODIFY  Lock_tables_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL;

ALTER TABLE func
  ENGINE=MyISAM, CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;
ALTER TABLE func
  MODIFY type enum ('function','aggregate') COLLATE utf8_general_ci NOT NULL;

#
# Modify log tables.
#

SET @old_log_state = @@global.general_log;
SET GLOBAL general_log = 'OFF';
ALTER TABLE general_log
  MODIFY event_time TIMESTAMP(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6) ON UPDATE CURRENT_TIMESTAMP(6),
  MODIFY user_host MEDIUMTEXT NOT NULL,
  MODIFY thread_id INTEGER NOT NULL,
  MODIFY server_id INTEGER UNSIGNED NOT NULL,
  MODIFY command_type VARCHAR(64) NOT NULL,
  MODIFY argument MEDIUMBLOB NOT NULL;
ALTER TABLE general_log
  MODIFY thread_id BIGINT(21) UNSIGNED NOT NULL;
SET GLOBAL general_log = @old_log_state;

SET @old_log_state = @@global.slow_query_log;
SET GLOBAL slow_query_log = 'OFF';
ALTER TABLE slow_log
  MODIFY start_time TIMESTAMP(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6) ON UPDATE CURRENT_TIMESTAMP(6),
  MODIFY user_host MEDIUMTEXT NOT NULL,
  MODIFY query_time TIME(6) NOT NULL,
  MODIFY lock_time TIME(6) NOT NULL,
  MODIFY rows_sent INTEGER NOT NULL,
  MODIFY rows_examined INTEGER NOT NULL,
  MODIFY db VARCHAR(512) NOT NULL,
  MODIFY last_insert_id INTEGER NOT NULL,
  MODIFY insert_id INTEGER NOT NULL,
  MODIFY server_id INTEGER UNSIGNED NOT NULL,
  MODIFY sql_text MEDIUMBLOB NOT NULL;
ALTER TABLE slow_log
  ADD COLUMN thread_id INTEGER NOT NULL AFTER sql_text;
ALTER TABLE slow_log
  MODIFY thread_id BIGINT(21) UNSIGNED NOT NULL;
SET GLOBAL slow_query_log = @old_log_state;

ALTER TABLE plugin
  MODIFY name varchar(64) COLLATE utf8_general_ci NOT NULL DEFAULT '',
  MODIFY dl varchar(128) COLLATE utf8_general_ci NOT NULL DEFAULT '',
  CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;

#
# Detect whether we had Create_view_priv
#
SET @hadCreateViewPriv:=0;
SELECT @hadCreateViewPriv:=1 FROM user WHERE Create_view_priv LIKE '%';

#
# Create VIEWs privileges (v5.0)
#
ALTER TABLE db ADD Create_view_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Lock_tables_priv;
ALTER TABLE db MODIFY Create_view_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Lock_tables_priv;

ALTER TABLE user ADD Create_view_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Repl_client_priv;
ALTER TABLE user MODIFY Create_view_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Repl_client_priv;

#
# Show VIEWs privileges (v5.0)
#
ALTER TABLE db ADD Show_view_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Create_view_priv;
ALTER TABLE db MODIFY Show_view_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Create_view_priv;

ALTER TABLE user ADD Show_view_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Create_view_priv;
ALTER TABLE user MODIFY Show_view_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Create_view_priv;

#
# Assign create/show view privileges to people who have create provileges
#
UPDATE user SET Create_view_priv=Create_priv, Show_view_priv=Create_priv where user<>"" AND @hadCreateViewPriv = 0;

#
#
#
SET @hadCreateRoutinePriv:=0;
SELECT @hadCreateRoutinePriv:=1 FROM user WHERE Create_routine_priv LIKE '%';

#
# Create PROCEDUREs privileges (v5.0)
#
ALTER TABLE db ADD Create_routine_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Show_view_priv;
ALTER TABLE db MODIFY Create_routine_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Show_view_priv;

ALTER TABLE user ADD Create_routine_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Show_view_priv;
ALTER TABLE user MODIFY Create_routine_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Show_view_priv;

#
# Alter PROCEDUREs privileges (v5.0)
#
ALTER TABLE db ADD Alter_routine_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Create_routine_priv;
ALTER TABLE db MODIFY Alter_routine_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Create_routine_priv;

ALTER TABLE user ADD Alter_routine_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Create_routine_priv;
ALTER TABLE user MODIFY Alter_routine_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Create_routine_priv;

ALTER TABLE db ADD Execute_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Alter_routine_priv;
ALTER TABLE db MODIFY Execute_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Alter_routine_priv;

#
# Assign create/alter routine privileges to people who have create privileges
#
UPDATE user SET Create_routine_priv=Create_priv, Alter_routine_priv=Alter_priv where user<>"" AND @hadCreateRoutinePriv = 0;
UPDATE db SET Create_routine_priv=Create_priv, Alter_routine_priv=Alter_priv, Execute_priv=Select_priv where user<>"" AND @hadCreateRoutinePriv = 0;

#
# Add max_user_connections resource limit
#
ALTER TABLE user ADD max_user_connections int(11) unsigned DEFAULT '0' NOT NULL AFTER max_connections;

#
# user.Create_user_priv
#

SET @hadCreateUserPriv:=0;
SELECT @hadCreateUserPriv:=1 FROM user WHERE Create_user_priv LIKE '%';

ALTER TABLE user ADD Create_user_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Alter_routine_priv;
ALTER TABLE user MODIFY Create_user_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Alter_routine_priv;
UPDATE user LEFT JOIN db USING (Host,User) SET Create_user_priv='Y'
  WHERE @hadCreateUserPriv = 0 AND
        (user.Grant_priv = 'Y' OR db.Grant_priv = 'Y');

#
# procs_priv
#

ALTER TABLE procs_priv
  MODIFY User char(32) NOT NULL default '',
  ENGINE=MyISAM,
  CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;

ALTER TABLE procs_priv
  MODIFY Proc_priv set('Execute','Alter Routine','Grant')
    COLLATE utf8_general_ci DEFAULT '' NOT NULL;

ALTER TABLE procs_priv
  MODIFY Routine_name char(64)
    COLLATE utf8_general_ci DEFAULT '' NOT NULL;

ALTER TABLE procs_priv
  ADD Routine_type enum('FUNCTION','PROCEDURE')
    COLLATE utf8_general_ci NOT NULL AFTER Routine_name;

ALTER TABLE procs_priv
  MODIFY Timestamp timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP AFTER Proc_priv;

ALTER TABLE procs_priv
  MODIFY Grantor char(93) DEFAULT '' NOT NULL;
#
# proc
#

# Correct the name fields to not binary, and expand sql_data_access
ALTER TABLE proc MODIFY name char(64) DEFAULT '' NOT NULL,
                 MODIFY specific_name char(64) DEFAULT '' NOT NULL,
                 MODIFY sql_data_access
                        enum('CONTAINS_SQL',
                             'NO_SQL',
                             'READS_SQL_DATA',
                             'MODIFIES_SQL_DATA'
                            ) DEFAULT 'CONTAINS_SQL' NOT NULL,
                 MODIFY body longblob NOT NULL,
                 MODIFY returns longblob NOT NULL,
                 MODIFY sql_mode
                        set('REAL_AS_FLOAT',
                            'PIPES_AS_CONCAT',
                            'ANSI_QUOTES',
                            'IGNORE_SPACE',
                            'NOT_USED',
                            'ONLY_FULL_GROUP_BY',
                            'NO_UNSIGNED_SUBTRACTION',
                            'NO_DIR_IN_CREATE',
                            'POSTGRESQL',
                            'ORACLE',
                            'MSSQL',
                            'DB2',
                            'MAXDB',
                            'NO_KEY_OPTIONS',
                            'NO_TABLE_OPTIONS',
                            'NO_FIELD_OPTIONS',
                            'MYSQL323',
                            'MYSQL40',
                            'ANSI',
                            'NO_AUTO_VALUE_ON_ZERO',
                            'NO_BACKSLASH_ESCAPES',
                            'STRICT_TRANS_TABLES',
                            'STRICT_ALL_TABLES',
                            'NO_ZERO_IN_DATE',
                            'NO_ZERO_DATE',
                            'INVALID_DATES',
                            'ERROR_FOR_DIVISION_BY_ZERO',
                            'TRADITIONAL',
                            'NO_AUTO_CREATE_USER',
                            'HIGH_NOT_PRECEDENCE',
                            'NO_ENGINE_SUBSTITUTION',
                            'PAD_CHAR_TO_FULL_LENGTH'
                            ) DEFAULT '' NOT NULL,
                 DEFAULT CHARACTER SET utf8;

# Correct the character set and collation
ALTER TABLE proc CONVERT TO CHARACTER SET utf8;
# Reset some fields after the conversion and change comment from char(64) to text
ALTER TABLE proc  MODIFY db
                         char(64) collate utf8_bin DEFAULT '' NOT NULL,
                  MODIFY definer
                         char(93) collate utf8_bin DEFAULT '' NOT NULL,
                  MODIFY comment
                         text collate utf8_bin DEFAULT '' NOT NULL;

ALTER TABLE proc ADD character_set_client
                     char(32) collate utf8_bin DEFAULT NULL
                     AFTER comment;
ALTER TABLE proc MODIFY character_set_client
                        char(32) collate utf8_bin DEFAULT NULL;

SELECT CASE WHEN COUNT(*) > 0 THEN 
CONCAT ("WARNING: NULL values of the 'character_set_client' column ('mysql.proc' table) have been updated with a default value (", @@character_set_client, "). Please verify if necessary.")
ELSE NULL 
END 
AS value FROM proc WHERE character_set_client IS NULL;

UPDATE proc SET character_set_client = @@character_set_client 
                     WHERE character_set_client IS NULL;

ALTER TABLE proc ADD collation_connection
                     char(32) collate utf8_bin DEFAULT NULL
                     AFTER character_set_client;
ALTER TABLE proc MODIFY collation_connection
                        char(32) collate utf8_bin DEFAULT NULL;

SELECT CASE WHEN COUNT(*) > 0 THEN 
CONCAT ("WARNING: NULL values of the 'collation_connection' column ('mysql.proc' table) have been updated with a default value (", @@collation_connection, "). Please verify if necessary.")
ELSE NULL 
END 
AS value FROM proc WHERE collation_connection IS NULL;

UPDATE proc SET collation_connection = @@collation_connection
                     WHERE collation_connection IS NULL;

ALTER TABLE proc ADD db_collation
                     char(32) collate utf8_bin DEFAULT NULL
                     AFTER collation_connection;
ALTER TABLE proc MODIFY db_collation
                        char(32) collate utf8_bin DEFAULT NULL;

SELECT CASE WHEN COUNT(*) > 0 THEN 
CONCAT ("WARNING: NULL values of the 'db_collation' column ('mysql.proc' table) have been updated with default values. Please verify if necessary.")
ELSE NULL
END
AS value FROM proc WHERE db_collation IS NULL;

UPDATE proc AS p SET db_collation  = 
                     ( SELECT DEFAULT_COLLATION_NAME 
                       FROM INFORMATION_SCHEMA.SCHEMATA 
                       WHERE SCHEMA_NAME = p.db)
                     WHERE db_collation IS NULL;

ALTER TABLE proc ADD body_utf8 longblob DEFAULT NULL
                     AFTER db_collation;
ALTER TABLE proc MODIFY body_utf8 longblob DEFAULT NULL;

#
# EVENT privilege
#
SET @hadEventPriv := 0;
SELECT @hadEventPriv :=1 FROM user WHERE Event_priv LIKE '%';

ALTER TABLE user add Event_priv enum('N','Y') character set utf8 DEFAULT 'N' NOT NULL AFTER Create_user_priv;
ALTER TABLE user MODIFY Event_priv enum('N','Y') character set utf8 DEFAULT 'N' NOT NULL AFTER Create_user_priv;

UPDATE user SET Event_priv=Super_priv WHERE @hadEventPriv = 0;

ALTER TABLE db add Event_priv enum('N','Y') character set utf8 DEFAULT 'N' NOT NULL;
ALTER TABLE db MODIFY Event_priv enum('N','Y') character set utf8 DEFAULT 'N' NOT NULL;

#
# EVENT table
#
ALTER TABLE event DROP PRIMARY KEY;
ALTER TABLE event ADD PRIMARY KEY(db, name);
# Add sql_mode column just in case.
ALTER TABLE event ADD sql_mode set ('NOT_USED') AFTER on_completion;
# Update list of sql_mode values.
ALTER TABLE event MODIFY sql_mode
                        set('REAL_AS_FLOAT',
                            'PIPES_AS_CONCAT',
                            'ANSI_QUOTES',
                            'IGNORE_SPACE',
                            'NOT_USED',
                            'ONLY_FULL_GROUP_BY',
                            'NO_UNSIGNED_SUBTRACTION',
                            'NO_DIR_IN_CREATE',
                            'POSTGRESQL',
                            'ORACLE',
                            'MSSQL',
                            'DB2',
                            'MAXDB',
                            'NO_KEY_OPTIONS',
                            'NO_TABLE_OPTIONS',
                            'NO_FIELD_OPTIONS',
                            'MYSQL323',
                            'MYSQL40',
                            'ANSI',
                            'NO_AUTO_VALUE_ON_ZERO',
                            'NO_BACKSLASH_ESCAPES',
                            'STRICT_TRANS_TABLES',
                            'STRICT_ALL_TABLES',
                            'NO_ZERO_IN_DATE',
                            'NO_ZERO_DATE',
                            'INVALID_DATES',
                            'ERROR_FOR_DIVISION_BY_ZERO',
                            'TRADITIONAL',
                            'NO_AUTO_CREATE_USER',
                            'HIGH_NOT_PRECEDENCE',
                            'NO_ENGINE_SUBSTITUTION',
                            'PAD_CHAR_TO_FULL_LENGTH'
                            ) DEFAULT '' NOT NULL AFTER on_completion;
ALTER TABLE event MODIFY name char(64) CHARACTER SET utf8 NOT NULL default '';

ALTER TABLE event MODIFY COLUMN originator INT UNSIGNED NOT NULL;
ALTER TABLE event ADD COLUMN originator INT UNSIGNED NOT NULL AFTER comment;

ALTER TABLE event MODIFY COLUMN status ENUM('ENABLED','DISABLED','SLAVESIDE_DISABLED') NOT NULL default 'ENABLED';

ALTER TABLE event ADD COLUMN time_zone char(64) CHARACTER SET latin1
        NOT NULL DEFAULT 'SYSTEM' AFTER originator;

ALTER TABLE event ADD character_set_client
                      char(32) collate utf8_bin DEFAULT NULL
                      AFTER time_zone;
ALTER TABLE event MODIFY character_set_client
                         char(32) collate utf8_bin DEFAULT NULL;

ALTER TABLE event ADD collation_connection
                      char(32) collate utf8_bin DEFAULT NULL
                      AFTER character_set_client;
ALTER TABLE event MODIFY collation_connection
                         char(32) collate utf8_bin DEFAULT NULL;

ALTER TABLE event ADD db_collation
                      char(32) collate utf8_bin DEFAULT NULL
                      AFTER collation_connection;
ALTER TABLE event MODIFY db_collation
                         char(32) collate utf8_bin DEFAULT NULL;

ALTER TABLE event ADD body_utf8 longblob DEFAULT NULL
                      AFTER db_collation;
ALTER TABLE event MODIFY body_utf8 longblob DEFAULT NULL;

ALTER TABLE event MODIFY definer char(93) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL default '';

#
# TRIGGER privilege
#

SET @hadTriggerPriv := 0;
SELECT @hadTriggerPriv :=1 FROM user WHERE Trigger_priv LIKE '%';

ALTER TABLE user ADD Trigger_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Event_priv;
ALTER TABLE user MODIFY Trigger_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Event_priv;

ALTER TABLE db ADD Trigger_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL;
ALTER TABLE db MODIFY Trigger_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL;

UPDATE user SET Trigger_priv=Super_priv WHERE @hadTriggerPriv = 0;

#
# user.Create_tablespace_priv
#

SET @hadCreateTablespacePriv := 0;
SELECT @hadCreateTablespacePriv :=1 FROM user WHERE Create_tablespace_priv LIKE '%';

ALTER TABLE user ADD Create_tablespace_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Trigger_priv;
ALTER TABLE user MODIFY Create_tablespace_priv enum('N','Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL AFTER Trigger_priv;

UPDATE user SET Create_tablespace_priv = Super_priv WHERE @hadCreateTablespacePriv = 0;

--
-- Unlike 'performance_schema', the 'mysql' database is reserved already,
-- so no user procedure is supposed to be there.
--
-- NOTE: until upgrade is finished, stored routines are not available,
-- because system tables (e.g. mysql.proc) might be not usable.
--
drop procedure if exists mysql.die;
create procedure mysql.die() signal sqlstate 'HY000' set message_text='Unexpected content found in the performance_schema database.';

--
-- For broken upgrades, SIGNAL the error
--

SET @cmd="call mysql.die()";

SET @str = IF(@broken_pfs > 0, @cmd, 'SET @dummy = 0');
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

drop procedure mysql.die;

ALTER TABLE user ADD plugin char(64) DEFAULT 'mysql_native_password' NOT NULL,  ADD authentication_string TEXT;
ALTER TABLE user MODIFY plugin char(64) DEFAULT 'mysql_native_password' NOT NULL;
UPDATE user SET plugin=IF((length(password) = 41) OR (length(password) = 0), 'mysql_native_password', '') WHERE plugin = '';
ALTER TABLE user MODIFY authentication_string TEXT;

-- establish if the field is already there.
SET @hadPasswordExpired:=0;
SELECT @hadPasswordExpired:=1 FROM user WHERE password_expired LIKE '%';

ALTER TABLE user ADD password_expired ENUM('N', 'Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL;
UPDATE user SET password_expired = 'N' WHERE @hadPasswordExpired=0;

-- need to compensate for the ALTER TABLE user .. CONVERT TO CHARACTER SET above
ALTER TABLE user MODIFY password_expired ENUM('N', 'Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL;

-- Need to pre-fill mysql.proxies_priv with access for root even when upgrading from
-- older versions

CREATE TEMPORARY TABLE tmp_proxies_priv LIKE proxies_priv;
INSERT INTO tmp_proxies_priv VALUES ('localhost', 'root', '', '', TRUE, '', now());
INSERT INTO proxies_priv SELECT * FROM tmp_proxies_priv WHERE @had_proxies_priv_table=0;
DROP TABLE tmp_proxies_priv;

-- Checking for any duplicate hostname and username combination are exists.
-- If exits we will throw error.
DROP PROCEDURE IF EXISTS mysql.warn_duplicate_host_names;
CREATE PROCEDURE mysql.warn_duplicate_host_names() SIGNAL SQLSTATE '45000'  SET MESSAGE_TEXT = 'Multiple accounts exist for @user_name, @host_name that differ only in Host lettercase; remove all except one of them';
SET @cmd='call mysql.warn_duplicate_host_names()';
SET @duplicate_hosts=(SELECT count(*) FROM mysql.user GROUP BY user, lower(host) HAVING count(*) > 1 LIMIT 1);
SET @str=IF(@duplicate_hosts > 1, @cmd, 'SET @dummy=0');

PREPARE stmt FROM @str;
EXECUTE stmt;
-- Get warnings (if any)
SHOW WARNINGS;
DROP PREPARE stmt;
DROP PROCEDURE mysql.warn_duplicate_host_names;

# Convering the host name to lower case for existing users
UPDATE user SET host=LOWER( host ) WHERE LOWER( host ) <> host;

#
# mysql.ndb_binlog_index
#
# Change type from BIGINT to INT
ALTER TABLE ndb_binlog_index
  MODIFY inserts INT UNSIGNED NOT NULL,
  MODIFY updates INT UNSIGNED NOT NULL,
  MODIFY deletes INT UNSIGNED NOT NULL,
  MODIFY schemaops INT UNSIGNED NOT NULL;
# Add new columns
ALTER TABLE ndb_binlog_index
  ADD orig_server_id INT UNSIGNED NOT NULL,
  ADD orig_epoch BIGINT UNSIGNED NOT NULL,
  ADD gci INT UNSIGNED NOT NULL;
# New primary key
ALTER TABLE ndb_binlog_index
  DROP PRIMARY KEY,
  ADD PRIMARY KEY(epoch, orig_server_id, orig_epoch);

--
-- Check for accounts with old pre-4.1 passwords and issue a warning
--

-- SCRAMBLED_PASSWORD_CHAR_LENGTH_323 = 16
SET @deprecated_pwds=(SELECT COUNT(*) FROM mysql.user WHERE LENGTH(password) = 16);

-- signal the deprecation error
DROP PROCEDURE IF EXISTS mysql.warn_pre41_pwd;
CREATE PROCEDURE mysql.warn_pre41_pwd() SIGNAL SQLSTATE '01000' SET MESSAGE_TEXT='Pre-4.1 password hash found. It is deprecated and will be removed in a future release. Please upgrade it to a new format.';
SET @cmd='call mysql.warn_pre41_pwd()';
SET @str=IF(@deprecated_pwds > 0, @cmd, 'SET @dummy=0');
PREPARE stmt FROM @str;
EXECUTE stmt;
-- Get warnings (if any)
SHOW WARNINGS;
DROP PREPARE stmt;
DROP PROCEDURE mysql.warn_pre41_pwd;

--
-- Add timestamp and expiry columns
--

ALTER TABLE user ADD password_last_changed timestamp NULL;
UPDATE user SET password_last_changed = CURRENT_TIMESTAMP WHERE plugin in ('mysql_native_password','sha256_password') and password_last_changed is NULL;

ALTER TABLE user ADD password_lifetime smallint unsigned NULL;

--
-- Add account_locked column
--
SET @hadAccountLocked:=0;
SELECT @hadAccountLocked:=1 FROM user WHERE account_locked LIKE '%';

ALTER TABLE user ADD account_locked ENUM('N', 'Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL;
UPDATE user SET account_locked = 'N' WHERE @hadAccountLocked=0;

-- need to compensate for the ALTER TABLE user .. CONVERT TO CHARACTER SET above
ALTER TABLE user MODIFY account_locked ENUM('N', 'Y') COLLATE utf8_general_ci DEFAULT 'N' NOT NULL;

--
-- Drop password column
--

SET @have_password= (SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = 'mysql'
                    AND TABLE_NAME='user'
                    AND column_name='password');
SET @str=IF(@have_password <> 0, "UPDATE user SET authentication_string = password where LENGTH(password) > 0 and plugin = 'mysql_native_password'", "SET @dummy = 0");
# We have already put mysql_native_password as plugin value in cases where length(PASSWORD) is either 0 or 41.
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;
SET @str=IF(@have_password <> 0, "ALTER TABLE user DROP password", "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

# Activate the new, possible modified privilege tables
# This should not be needed, but gives us some extra testing that the above
# changes was correct

flush privileges;

ALTER TABLE slave_master_info ADD Ssl_crl TEXT CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The file used for the Certificate Revocation List (CRL)';
ALTER TABLE slave_master_info ADD Ssl_crlpath TEXT CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The path used for Certificate Revocation List (CRL) files';
ALTER TABLE slave_master_info STATS_PERSISTENT=0;
ALTER TABLE slave_worker_info STATS_PERSISTENT=0;
ALTER TABLE slave_relay_log_info STATS_PERSISTENT=0;
ALTER TABLE gtid_executed STATS_PERSISTENT=0;

#
# From 5.7 onwards, all slave info tables have Channel_Name as a column.
# This column is needed  for multi-source replication
#
ALTER TABLE slave_master_info
  ADD Channel_name CHAR(64) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL DEFAULT '' COMMENT 'The channel on which the slave is connected to a source. Used in Multisource Replication',
  DROP PRIMARY KEY,
  ADD PRIMARY KEY(Channel_name);

ALTER TABLE slave_relay_log_info
  ADD Channel_name CHAR(64) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL DEFAULT '' COMMENT 'The channel on which the slave is connected to a source. Used in Multisource Replication',
  DROP PRIMARY KEY,
  ADD PRIMARY KEY(Channel_name);

ALTER TABLE slave_worker_info
  ADD Channel_name CHAR(64) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL DEFAULT '' COMMENT 'The channel on which the slave is connected to a source. Used in Multisource Replication',
  DROP PRIMARY KEY,
  ADD PRIMARY KEY(Channel_name, Id);

# The Tls_version field at slave_master_info should be added after the Channel_name field
ALTER TABLE slave_master_info ADD Tls_version TEXT CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'Tls version';

# If the order of columns Channel_name and Tls_version is wrong, this will correct the order
# in slave_master_info table.
ALTER TABLE slave_master_info
  MODIFY COLUMN Tls_version TEXT CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'Tls version'
  AFTER Channel_name;

SET @have_innodb= (SELECT COUNT(engine) FROM information_schema.engines WHERE engine='InnoDB' AND support != 'NO');
SET @str=IF(@have_innodb <> 0, "ALTER TABLE innodb_table_stats STATS_PERSISTENT=0", "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @str=IF(@have_innodb <> 0, "ALTER TABLE innodb_index_stats STATS_PERSISTENT=0", "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

#
# ndb_binlog_index table
#
ALTER TABLE ndb_binlog_index
  ADD COLUMN next_position BIGINT UNSIGNED NOT NULL;
ALTER TABLE ndb_binlog_index
  ADD COLUMN next_file VARCHAR(255) NOT NULL;

--
-- Check for non-empty host table and issue a warning
--

DROP PROCEDURE IF EXISTS mysql.warn_host_table_nonempty;
CREATE PROCEDURE mysql.warn_host_table_nonempty() SIGNAL SQLSTATE '01000' SET MESSAGE_TEXT='Table mysql.host is not empty. It is deprecated and will be removed in a future release.';
SET @cmd='call mysql.warn_host_table_nonempty()';

SET @have_host_table=0;
SET @host_table_nonempty=0;
SET @have_host_table=(SELECT COUNT(*) FROM information_schema.tables WHERE table_name LIKE 'host' AND table_schema LIKE 'mysql' AND table_type LIKE 'BASE TABLE');

SET @host_table_nonempty_str=IF(@have_host_table > 0, 'SET @host_table_nonempty=(SELECT COUNT(*) FROM mysql.host)', 'SET @dummy=0');
PREPARE stmt FROM @host_table_nonempty_str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @str=IF(@host_table_nonempty > 0, @cmd, 'SET @dummy=0');

PREPARE stmt FROM @str;
EXECUTE stmt;
-- Get warnings (if any)
SHOW WARNINGS;
DROP PREPARE stmt;
DROP PROCEDURE mysql.warn_host_table_nonempty;

--
-- Upgrade help tables
--

ALTER TABLE help_category MODIFY url TEXT NOT NULL;
ALTER TABLE help_topic MODIFY url TEXT NOT NULL;

--
-- Upgrade a table engine from MyISAM to InnoDB for the system tables
-- help_topic, help_category, help_relation, help_keyword, plugin, servers,
-- time_zone, time_zone_leap_second, time_zone_name, time_zone_transition,
-- time_zone_transition_type.

ALTER TABLE help_topic ENGINE=InnoDB STATS_PERSISTENT=0;
ALTER TABLE help_category ENGINE=InnoDB STATS_PERSISTENT=0;
ALTER TABLE help_relation ENGINE=InnoDB STATS_PERSISTENT=0;
ALTER TABLE help_keyword ENGINE=InnoDB STATS_PERSISTENT=0;
ALTER TABLE plugin ENGINE=InnoDB STATS_PERSISTENT=0;
ALTER TABLE servers ENGINE=InnoDB STATS_PERSISTENT=0;
ALTER TABLE time_zone ENGINE=InnoDB STATS_PERSISTENT=0;
ALTER TABLE time_zone_leap_second ENGINE=InnoDB STATS_PERSISTENT=0;
ALTER TABLE time_zone_name ENGINE=InnoDB STATS_PERSISTENT=0;
ALTER TABLE time_zone_transition ENGINE=InnoDB STATS_PERSISTENT=0;
ALTER TABLE time_zone_transition_type ENGINE=InnoDB STATS_PERSISTENT=0;

# Move any distributed grant tables back to NDB after upgrade
SET @cmd="ALTER TABLE mysql.user ENGINE=NDB";
SET @str = IF(@had_distributed_user > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @cmd="ALTER TABLE mysql.db ENGINE=NDB";
SET @str = IF(@had_distributed_db > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @cmd="ALTER TABLE mysql.tables_priv ENGINE=NDB";
SET @str = IF(@had_distributed_tables_priv > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @cmd="ALTER TABLE mysql.columns_priv ENGINE=NDB";
SET @str = IF(@had_distributed_columns_priv > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @cmd="ALTER TABLE mysql.procs_priv ENGINE=NDB";
SET @str = IF(@had_distributed_procs_priv > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @cmd="ALTER TABLE mysql.proxies_priv ENGINE=NDB";
SET @str = IF(@had_distributed_proxies_priv > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

--
-- MySQL 8.0 adds default_value column to cost tables
-- In case of downgrade to 5.7, remove these columns
--

-- Drop column default_value from mysql.server_cost if it exists
SET @have_server_cost_default =
  (SELECT COUNT(column_name) FROM information_schema.columns
     WHERE table_schema = 'mysql' AND table_name = 'server_cost' AND
           column_name = 'default_value');
SET @cmd="ALTER TABLE mysql.server_cost DROP COLUMN default_value";
SET @str = IF(@have_server_cost_default > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

-- Drop column default_value from mysql.engine_cost if it exists
SET @have_engine_cost_default =
  (SELECT COUNT(column_name) FROM information_schema.columns
     WHERE table_schema = 'mysql' AND table_name = 'engine_cost' AND
           column_name = 'default_value');
SET @cmd="ALTER TABLE mysql.engine_cost DROP COLUMN default_value";
SET @str = IF(@have_engine_cost_default > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

#
# SQL commands for creating the user in MySQL Server which can be used by the
# internal server session service
# Notes:
# This user is disabled for login
# This user has super privileges and select privileges into performance schema
# tables the mysql.user table.
#

INSERT IGNORE INTO mysql.user VALUES ('localhost','mysql.session','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','Y','N','N','N','N','N','N','N','N','N','N','N','N','N','','','','',0,0,0,0,'mysql_native_password','*THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE','N',CURRENT_TIMESTAMP,NULL,'Y');

INSERT IGNORE INTO mysql.tables_priv VALUES ('localhost', 'mysql', 'mysql.session', 'user', 'root\@localhost', CURRENT_TIMESTAMP, 'Select', '');

INSERT IGNORE INTO mysql.db VALUES ('localhost', 'performance_schema', 'mysql.session','Y','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N','N');

--
-- Update column definition (size and charset) for audit log tables.
--

SET @had_audit_log_user =
  (SELECT COUNT(table_name) FROM information_schema.tables
     WHERE table_schema = 'mysql' AND table_name = 'audit_log_user' AND
           table_type = 'BASE TABLE');
SET @cmd="ALTER TABLE mysql.audit_log_user DROP FOREIGN KEY audit_log_user_ibfk_1";
SET @str = IF(@had_audit_log_user > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @had_audit_log_filter =
  (SELECT COUNT(table_name) FROM information_schema.tables
     WHERE table_schema = 'mysql' AND table_name = 'audit_log_filter' AND
           table_type = 'BASE TABLE');
SET @cmd="ALTER TABLE mysql.audit_log_filter ENGINE=InnoDB";
SET @str = IF(@had_audit_log_filter > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @cmd="ALTER TABLE mysql.audit_log_filter CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin";
SET @str = IF(@had_audit_log_filter > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @had_audit_log_user =
  (SELECT COUNT(table_name) FROM information_schema.tables
     WHERE table_schema = 'mysql' AND table_name = 'audit_log_user' AND
           table_type = 'BASE TABLE');
SET @cmd="ALTER TABLE mysql.audit_log_user ENGINE=InnoDB";
SET @str = IF(@had_audit_log_user > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @cmd="ALTER TABLE mysql.audit_log_user CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin";
SET @str = IF(@had_audit_log_user > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @cmd="ALTER TABLE mysql.audit_log_user MODIFY COLUMN USER VARCHAR(32)";
SET @str = IF(@had_audit_log_user > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

SET @cmd="ALTER TABLE mysql.audit_log_user ADD FOREIGN KEY (FILTERNAME) REFERENCES mysql.audit_log_filter(NAME)";
SET @str = IF(@had_audit_log_user > 0, @cmd, "SET @dummy = 0");
PREPARE stmt FROM @str;
EXECUTE stmt;
DROP PREPARE stmt;

FLUSH PRIVILEGES;

--
-- Update the column length of 'table_name' column for stats tables.
--

alter table mysql.innodb_table_stats modify table_name varchar(199);
alter table mysql.innodb_index_stats modify table_name varchar(199);