Revert "MDEV-28727 ALTER TABLE ALGORITHM=NOCOPY does not work after upgrade"

This reverts commit 1ea5e402

mysql-test/main/mysql_upgrade.result

@@ -947,42 +947,4 @@ disconnect con1;
 connection default;
 drop table mysql.global_priv;
 rename table mysql.global_priv_bak to mysql.global_priv;
-#
-# MDEV-28727 ALTER TABLE ALGORITHM=NOCOPY does not work after upgrade
-#
-create or replace table pet4 (
-build_time double(18, 7) default null,
-key idx1 (build_time)
-) engine innodb;
-check table pet4;
-Table	Op	Msg_type	Msg_text
-test.pet4	check	error	Table rebuild required. Please do "ALTER TABLE `pet4` FORCE" or dump/reload to fix it!
-check table pet4 for upgrade;
-Table	Op	Msg_type	Msg_text
-test.pet4	check	error	Table rebuild required. Please do "ALTER TABLE `pet4` FORCE" or dump/reload to fix it!
-alter table pet4 add i1 int, algorithm=nocopy;
-ERROR 0A000: ALGORITHM=NOCOPY is not supported for this operation. Try ALGORITHM=INPLACE
-# Running mysqlcheck
-test.pet4
-error    : Table rebuild required. Please do "ALTER TABLE `pet4` FORCE" or dump/reload to fix it!
-
-Repairing tables
-check table pet4;
-Table	Op	Msg_type	Msg_text
-test.pet4	check	status	OK
-alter table pet4 add i1 int, algorithm=nocopy;
-create or replace table pet4 (
-build_time double(18, 7) default null,
-key idx1 (build_time)
-) engine innodb;
-alter table pet4 add i1 int, algorithm=nocopy;
-ERROR 0A000: ALGORITHM=NOCOPY is not supported for this operation. Try ALGORITHM=INPLACE
-# Running mysql_upgrade
-test.pet4
-error    : Table rebuild required. Please do "ALTER TABLE `pet4` FORCE" or dump/reload to fix it!
-check table pet4;
-Table	Op	Msg_type	Msg_text
-test.pet4	check	status	OK
-alter table pet4 add i1 int, algorithm=nocopy;
-drop table pet4;
 # End of 10.4 tests

mysql-test/main/mysql_upgrade.test

@@ -472,45 +472,4 @@ drop table mysql.global_priv;
 rename table mysql.global_priv_bak to mysql.global_priv;
 --remove_file $MYSQLD_DATADIR/mysql_upgrade_info
 
---echo #
---echo # MDEV-28727 ALTER TABLE ALGORITHM=NOCOPY does not work after upgrade
---echo #
-create or replace table pet4 (
-  build_time double(18, 7) default null,
-  key idx1 (build_time)
-) engine innodb;
-
---remove_file $MYSQLD_DATADIR/test/pet4.frm
---copy_file std_data/mdev-28727-pet4.frm $MYSQLD_DATADIR/test/pet4.frm
-
-check table pet4;
-check table pet4 for upgrade;
---error ER_ALTER_OPERATION_NOT_SUPPORTED
-alter table pet4 add i1 int, algorithm=nocopy;
-
---echo # Running mysqlcheck
---exec $MYSQL_CHECK --auto-repair --databases test 2>&1
-check table pet4;
-alter table pet4 add i1 int, algorithm=nocopy;
-
-create or replace table pet4 (
-  build_time double(18, 7) default null,
-  key idx1 (build_time)
-) engine innodb;
-
---remove_file $MYSQLD_DATADIR/test/pet4.frm
---copy_file std_data/mdev-28727-pet4.frm $MYSQLD_DATADIR/test/pet4.frm
-
---error ER_ALTER_OPERATION_NOT_SUPPORTED
-alter table pet4 add i1 int, algorithm=nocopy;
-
---echo # Running mysql_upgrade
---exec $MYSQL_UPGRADE --silent 2>&1
-file_exists $MYSQLD_DATADIR/mysql_upgrade_info;
-check table pet4;
-alter table pet4 add i1 int, algorithm=nocopy;
-
---remove_file $MYSQLD_DATADIR/mysql_upgrade_info
-drop table pet4;
-
 --echo # End of 10.4 tests

sql/handler.cc

@@ -4370,32 +4370,17 @@ int handler::ha_check(THD *thd, HA_CHECK_OPT *check_opt)
   DBUG_ASSERT(table_share->tmp_table != NO_TMP_TABLE ||
               m_lock_type != F_UNLCK);
 
-  const ulong v= table->s->mysql_version;
-
-  if ((v >= MYSQL_VERSION_ID) &&
+  if ((table->s->mysql_version >= MYSQL_VERSION_ID) &&
       (check_opt->sql_flags & TT_FOR_UPGRADE))
     return 0;
 
-  if (v < MYSQL_VERSION_ID)
+  if (table->s->mysql_version < MYSQL_VERSION_ID)
   {
     if (unlikely((error= check_old_types())))
       return error;
     error= ha_check_for_upgrade(check_opt);
     if (unlikely(error && (error != HA_ADMIN_NEEDS_CHECK)))
       return error;
-    if (table->s->table_category == TABLE_CATEGORY_USER &&
-        (v < 100142 ||
-         (v >= 100200 && v < 100228) ||
-         (v >= 100300 && v < 100319) ||
-         (v >= 100400 && v < 100409)))
-    {
-      for (const KEY *key= table->key_info,
-           *end= table->key_info + table->s->keys; key < end; key++)
-      {
-        if (key->flags & HA_BINARY_PACK_KEY && key->flags & HA_VAR_LENGTH_KEY)
-          return HA_ADMIN_NEEDS_UPGRADE;
-      }
-    }
     if (unlikely(!error && (check_opt->sql_flags & TT_FOR_UPGRADE)))
       return 0;
   }