#
# MDEV-20228 `mysql_upgrade` fails on every version upgrade: "ERROR 1267 (HY000) at line 7: Illegal mix of collations (utf8mb4_unicode_ci,COERCIBLE) and (utf8mb4_general_ci,COERCIBLE) for operation 'like'"
#
SET sql_mode="";
SET NAMES utf8mb4 COLLATE utf8mb4_unicode_ci;
#
# Changing character_set_client and collation_connection
# for the VIEW mysql.user to utf8mb4/utf8mb4_unicode_ci,
# to emulate that mysql.user was created by 'mysqld --bootstrap'
# using mysqld compiled with
# -DDEFAULT_CHARSET=utf8mb4 -DDEFAULT_COLLATION=utf8mb4_unicode_ci
#
SELECT CHARACTER_SET_CLIENT, COLLATION_CONNECTION
FROM INFORMATION_SCHEMA.VIEWS
WHERE TABLE_SCHEMA='mysql' AND TABLE_NAME='user';
CHARACTER_SET_CLIENT	COLLATION_CONNECTION
utf8mb4	utf8mb4_unicode_ci
# Running mysql_upgrade
Phase 1/7: Checking and upgrading mysql database
Processing databases
mysql
mysql.column_stats                                 OK
mysql.columns_priv                                 OK
mysql.db                                           OK
mysql.event                                        OK
mysql.func                                         OK
mysql.global_priv                                  OK
mysql.gtid_slave_pos                               OK
mysql.help_category                                OK
mysql.help_keyword                                 OK
mysql.help_relation                                OK
mysql.help_topic                                   OK
mysql.index_stats                                  OK
mysql.innodb_index_stats                           OK
mysql.innodb_table_stats                           OK
mysql.plugin                                       OK
mysql.proc                                         OK
mysql.procs_priv                                   OK
mysql.proxies_priv                                 OK
mysql.roles_mapping                                OK
mysql.servers                                      OK
mysql.table_stats                                  OK
mysql.tables_priv                                  OK
mysql.time_zone                                    OK
mysql.time_zone_leap_second                        OK
mysql.time_zone_name                               OK
mysql.time_zone_transition                         OK
mysql.time_zone_transition_type                    OK
mysql.transaction_registry                         OK
Phase 2/7: Installing used storage engines... Skipped
Phase 3/7: Fixing views
mysql.user                                         OK
Phase 4/7: Running 'mysql_fix_privilege_tables'
Phase 5/7: Fixing table and database names
Phase 6/7: Checking and upgrading tables
Processing databases
information_schema
mtr
mtr.global_suppressions                            OK
mtr.test_suppressions                              OK
performance_schema
test
Phase 7/7: Running 'FLUSH PRIVILEGES'
OK
#
# Restoring character_set_client and collation_connection back
# so post-check returns the expected check-mysqld_1.result
#
SET NAMES latin1;