diff --git a/mysql-test/r/lowercase_view.result b/mysql-test/r/lowercase_view.result
index c37dc41c495..33c87ec101c 100644
--- a/mysql-test/r/lowercase_view.result
+++ b/mysql-test/r/lowercase_view.result
@@ -148,3 +148,20 @@ a
 DROP VIEW v1;
 DROP TABLE t1;
 End of 5.0 tests.
+#
+# Bug #53095: SELECT column_name FROM INFORMATION_SCHEMA.STATISTICS
+#  returns nothing
+#
+CREATE TABLE `ttt` (
+`f1` char(3) NOT NULL,
+PRIMARY KEY (`f1`)
+) ENGINE=myisam DEFAULT CHARSET=latin1;
+SELECT count(COLUMN_NAME) FROM INFORMATION_SCHEMA.STATISTICS WHERE TABLE_NAME =
+'TTT';
+count(COLUMN_NAME)
+1
+SELECT count(*) FROM INFORMATION_SCHEMA.STATISTICS WHERE TABLE_NAME = 'TTT';
+count(*)
+1
+DROP TABLE `ttt`;
+End of 5.0 tests.
diff --git a/mysql-test/r/mysql_upgrade.result b/mysql-test/r/mysql_upgrade.result
index 394beb042a5..58f6ffd4040 100644
--- a/mysql-test/r/mysql_upgrade.result
+++ b/mysql-test/r/mysql_upgrade.result
@@ -169,4 +169,46 @@ DROP PROCEDURE testproc;
 WARNING: NULL values of the 'character_set_client' column ('mysql.proc' table) have been updated with a default value (latin1). Please verify if necessary.
 WARNING: NULL values of the 'collation_connection' column ('mysql.proc' table) have been updated with a default value (latin1_swedish_ci). Please verify if necessary.
 WARNING: NULL values of the 'db_collation' column ('mysql.proc' table) have been updated with default values. Please verify if necessary.
+#
+# Bug #53613: mysql_upgrade incorrectly revokes 
+#   TRIGGER privilege on given table
+#
+GRANT USAGE ON *.* TO 'user3'@'%';
+GRANT ALL PRIVILEGES ON `roelt`.`test2` TO 'user3'@'%';
+Run mysql_upgrade with all privileges on a user
+mtr.global_suppressions                            OK
+mtr.test_suppressions                              OK
+mysql.columns_priv                                 OK
+mysql.db                                           OK
+mysql.event                                        OK
+mysql.func                                         OK
+mysql.general_log
+Error    : You can't use locks with log tables.
+status   : OK
+mysql.help_category                                OK
+mysql.help_keyword                                 OK
+mysql.help_relation                                OK
+mysql.help_topic                                   OK
+mysql.host                                         OK
+mysql.ndb_binlog_index                             OK
+mysql.plugin                                       OK
+mysql.proc                                         OK
+mysql.procs_priv                                   OK
+mysql.servers                                      OK
+mysql.slow_log
+Error    : You can't use locks with log tables.
+status   : 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.user                                         OK
+SHOW GRANTS FOR 'user3'@'%';
+Grants for user3@%
+GRANT USAGE ON *.* TO 'user3'@'%'
+GRANT ALL PRIVILEGES ON `roelt`.`test2` TO 'user3'@'%'
+DROP USER 'user3'@'%';
+End of 5.1 tests
 The --upgrade-system-tables option was used, databases won't be touched.
diff --git a/mysql-test/t/lowercase_view.test b/mysql-test/t/lowercase_view.test
index d6612b3e6b9..52be911cde0 100644
--- a/mysql-test/t/lowercase_view.test
+++ b/mysql-test/t/lowercase_view.test
@@ -160,4 +160,26 @@ SELECT * FROM v1;
 DROP VIEW v1;
 DROP TABLE t1;
 
+
 --echo End of 5.0 tests.
+
+
+--echo #
+--echo # Bug #53095: SELECT column_name FROM INFORMATION_SCHEMA.STATISTICS
+--echo #  returns nothing
+--echo #
+
+CREATE TABLE `ttt` (
+  `f1` char(3) NOT NULL,
+  PRIMARY KEY (`f1`)
+) ENGINE=myisam DEFAULT CHARSET=latin1;
+
+SELECT count(COLUMN_NAME) FROM INFORMATION_SCHEMA.STATISTICS WHERE TABLE_NAME =
+'TTT';
+SELECT count(*) FROM INFORMATION_SCHEMA.STATISTICS WHERE TABLE_NAME = 'TTT';
+
+DROP TABLE `ttt`;
+
+
+--echo End of 5.0 tests.
+
diff --git a/mysql-test/t/mysql_upgrade.test b/mysql-test/t/mysql_upgrade.test
index 83d97954222..3ea612d2ca7 100644
--- a/mysql-test/t/mysql_upgrade.test
+++ b/mysql-test/t/mysql_upgrade.test
@@ -108,6 +108,23 @@ DROP PROCEDURE testproc;
 --cat_file $MYSQLTEST_VARDIR/tmp/41569.txt
 --remove_file $MYSQLTEST_VARDIR/tmp/41569.txt
 
+
+--echo #
+--echo # Bug #53613: mysql_upgrade incorrectly revokes 
+--echo #   TRIGGER privilege on given table
+--echo #
+
+GRANT USAGE ON *.* TO 'user3'@'%';
+GRANT ALL PRIVILEGES ON `roelt`.`test2` TO 'user3'@'%';
+--echo Run mysql_upgrade with all privileges on a user
+--exec $MYSQL_UPGRADE --skip-verbose --force 2>&1
+SHOW GRANTS FOR 'user3'@'%';
+
+DROP USER 'user3'@'%';
+
+--echo End of 5.1 tests
+
+
 #
 # Test the --upgrade-system-tables option
 #
diff --git a/scripts/mysql_system_tables_fix.sql b/scripts/mysql_system_tables_fix.sql
index 3b6f0cccf20..2020971fb1a 100644
--- a/scripts/mysql_system_tables_fix.sql
+++ b/scripts/mysql_system_tables_fix.sql
@@ -69,7 +69,7 @@ ALTER TABLE tables_priv
     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')
+                        'Create View','Show view','Trigger')
     COLLATE utf8_general_ci DEFAULT '' NOT NULL,
   COMMENT='Table privileges';
 
@@ -603,8 +603,6 @@ ALTER TABLE host MODIFY Trigger_priv enum('N','Y') COLLATE utf8_general_ci DEFAU
 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;
 
-ALTER TABLE tables_priv 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;
-
 UPDATE user SET Trigger_priv=Super_priv WHERE @hadTriggerPriv = 0;
 
 #
diff --git a/sql/sql_show.cc b/sql/sql_show.cc
index 5f2b975a94d..57c5d12abd7 100644
--- a/sql/sql_show.cc
+++ b/sql/sql_show.cc
@@ -2626,36 +2626,54 @@ bool get_lookup_field_values(THD *thd, COND *cond, TABLE_LIST *tables,
 {
   LEX *lex= thd->lex;
   const char *wild= lex->wild ? lex->wild->ptr() : NullS;
+  bool rc= 0;
+
   bzero((char*) lookup_field_values, sizeof(LOOKUP_FIELD_VALUES));
   switch (lex->sql_command) {
   case SQLCOM_SHOW_DATABASES:
     if (wild)
     {
-      lookup_field_values->db_value.str= (char*) wild;
-      lookup_field_values->db_value.length= strlen(wild);
+      thd->make_lex_string(&lookup_field_values->db_value, 
+                           wild, strlen(wild), 0);
       lookup_field_values->wild_db_value= 1;
     }
-    return 0;
+    break;
   case SQLCOM_SHOW_TABLES:
   case SQLCOM_SHOW_TABLE_STATUS:
   case SQLCOM_SHOW_TRIGGERS:
   case SQLCOM_SHOW_EVENTS:
-    lookup_field_values->db_value.str= lex->select_lex.db;
-    lookup_field_values->db_value.length=strlen(lex->select_lex.db);
+    thd->make_lex_string(&lookup_field_values->db_value, 
+                         lex->select_lex.db, strlen(lex->select_lex.db), 0);
     if (wild)
     {
-      lookup_field_values->table_value.str= (char*)wild;
-      lookup_field_values->table_value.length= strlen(wild);
+      thd->make_lex_string(&lookup_field_values->table_value, 
+                           wild, strlen(wild), 0);
       lookup_field_values->wild_table_value= 1;
     }
-    return 0;
+    break;
   default:
     /*
       The "default" is for queries over I_S.
       All previous cases handle SHOW commands.
     */
-    return calc_lookup_values_from_cond(thd, cond, tables, lookup_field_values);
+    rc= calc_lookup_values_from_cond(thd, cond, tables, lookup_field_values);
+    break;
   }
+
+  if (lower_case_table_names && !rc)
+  {
+    /* 
+      We can safely do in-place upgrades here since all of the above cases
+      are allocating a new memory buffer for these strings.
+    */  
+    if (lookup_field_values->db_value.str && lookup_field_values->db_value.str[0])
+      my_casedn_str(system_charset_info, lookup_field_values->db_value.str);
+    if (lookup_field_values->table_value.str && 
+        lookup_field_values->table_value.str[0])
+      my_casedn_str(system_charset_info, lookup_field_values->table_value.str);
+  }
+
+  return rc;
 }
 
 
@@ -3441,6 +3459,7 @@ int get_all_tables(THD *thd, TABLE_LIST *tables, COND *cond)
     error= 0;
     goto err;
   }
+
   DBUG_PRINT("INDEX VALUES",("db_name='%s', table_name='%s'",
                              STR_OR_NIL(lookup_field_vals.db_value.str),
                              STR_OR_NIL(lookup_field_vals.table_value.str)));