FM / private

/usr/include/mysql/server/private

Name	Size	Mode	Actions
atomic/	-	0755	rm
data/	-	0755	rm
aligned.h	1136	0644	edit dl rm
aria_backup.h	1547	0644	edit dl rm
assume_aligned.h	2350	0644	edit dl rm
authors.h	10141	0644	edit dl rm
backup.h	1703	0644	edit dl rm
bounded_queue.h	6093	0644	edit dl rm
client_settings.h	1935	0644	edit dl rm
compat56.h	2280	0644	edit dl rm
config.h	14574	0644	edit dl rm
contributors.h	4878	0644	edit dl rm
create_options.h	4524	0644	edit dl rm
create_tmp_table.h	2808	0644	edit dl rm
cset_narrowing.h	3968	0644	edit dl rm
custom_conf.h	1082	0644	edit dl rm
datadict.h	1700	0644	edit dl rm
ddl_log.h	12685	0644	edit dl rm
debug.h	1234	0644	edit dl rm
debug_sync.h	2046	0644	edit dl rm
derived_handler.h	2379	0644	edit dl rm
derror.h	980	0644	edit dl rm
des_key_file.h	1236	0644	edit dl rm
discover.h	1570	0644	edit dl rm
dur_prop.h	1082	0644	edit dl rm
embedded_priv.h	1733	0644	edit dl rm
events.h	4704	0644	edit dl rm
event_data_objects.h	4187	0644	edit dl rm
event_db_repository.h	3648	0644	edit dl rm
event_parse_data.h	2899	0644	edit dl rm
event_queue.h	3438	0644	edit dl rm
event_scheduler.h	3290	0644	edit dl rm
field.h	220767	0644	edit dl rm
field_comp.h	1174	0644	edit dl rm
filesort.h	7283	0644	edit dl rm
filesort_utils.h	8195	0644	edit dl rm
ft_global.h	3113	0644	edit dl rm
gcalc_slicescan.h	17330	0644	edit dl rm
gcalc_tools.h	11900	0644	edit dl rm
grant.h	2758	0644	edit dl rm
group_by_handler.h	3534	0644	edit dl rm
gstream.h	2437	0644	edit dl rm
handler.h	201737	0644	edit dl rm
handle_connections_win.h	884	0644	edit dl rm
hash.h	4449	0644	edit dl rm
hash_filo.h	5688	0644	edit dl rm
ha_handler_stats.h	2335	0644	edit dl rm
ha_partition.h	64305	0644	edit dl rm
ha_sequence.h	6245	0644	edit dl rm
heap.h	9480	0644	edit dl rm
hostname.h	5419	0644	edit dl rm
ilist.h	7135	0644	edit dl rm
init.h	852	0644	edit dl rm
innodb_priv.h	1319	0644	edit dl rm
item.h	280567	0644	edit dl rm
item_cmpfunc.h	135743	0644	edit dl rm
item_create.h	11501	0644	edit dl rm
item_func.h	138023	0644	edit dl rm
item_geofunc.h	39445	0644	edit dl rm
item_jsonfunc.h	22841	0644	edit dl rm
item_row.h	5229	0644	edit dl rm
item_strfunc.h	73466	0644	edit dl rm
item_subselect.h	59166	0644	edit dl rm
item_sum.h	72595	0644	edit dl rm
item_timefunc.h	65614	0644	edit dl rm
item_vers.h	4386	0644	edit dl rm
item_windowfunc.h	34508	0644	edit dl rm
item_xmlfunc.h	4633	0644	edit dl rm
json_table.h	9506	0644	edit dl rm
key.h	2132	0644	edit dl rm
keycaches.h	1995	0644	edit dl rm
lex.h	29569	0644	edit dl rm
lex_hash.h	142295	0644	edit dl rm
lex_ident.h	2122	0644	edit dl rm
lex_string.h	4068	0644	edit dl rm
lex_symbol.h	1323	0644	edit dl rm
lex_token.h	42502	0644	edit dl rm
lf.h	6462	0644	edit dl rm
lock.h	2203	0644	edit dl rm
log.h	46083	0644	edit dl rm
log_event.h	186410	0644	edit dl rm
log_event_data_type.h	1890	0644	edit dl rm
log_event_old.h	19830	0644	edit dl rm
log_slow.h	2442	0644	edit dl rm
maria.h	5872	0644	edit dl rm
mariadb.h	1277	0644	edit dl rm
mdl.h	38468	0644	edit dl rm
mem_root_array.h	7106	0644	edit dl rm
message.h	1195	0644	edit dl rm
multi_range_read.h	23179	0644	edit dl rm
myisam.h	17506	0644	edit dl rm
myisamchk.h	4716	0644	edit dl rm
myisammrg.h	4897	0644	edit dl rm
myisampack.h	14929	0644	edit dl rm
mysqld.h	40547	0644	edit dl rm
mysqld_default_groups.h	204	0644	edit dl rm
mysqld_suffix.h	1201	0644	edit dl rm
mysys_err.h	3022	0644	edit dl rm
my_alarm.h	2429	0644	edit dl rm
my_apc.h	4747	0644	edit dl rm
my_atomic.h	7281	0644	edit dl rm
my_atomic_wrapper.h	3051	0644	edit dl rm
my_base.h	27210	0644	edit dl rm
my_bit.h	6196	0644	edit dl rm
my_bitmap.h	5882	0644	edit dl rm
my_check_opt.h	2618	0644	edit dl rm
my_compare.h	11194	0644	edit dl rm
my_counter.h	1721	0644	edit dl rm
my_cpu.h	4855	0644	edit dl rm
my_crypt.h	904	0644	edit dl rm
my_decimal.h	14489	0644	edit dl rm
my_default.h	1880	0644	edit dl rm
my_handler_errors.h	4882	0644	edit dl rm
my_json_writer.h	18382	0644	edit dl rm
my_libwrap.h	1183	0644	edit dl rm
my_md5.h	1486	0644	edit dl rm
my_minidump.h	848	0644	edit dl rm
my_nosys.h	1438	0644	edit dl rm
my_rdtsc.h	8425	0644	edit dl rm
my_rnd.h	1064	0644	edit dl rm
my_service_manager.h	2050	0644	edit dl rm
my_stacktrace.h	3215	0644	edit dl rm
my_stack_alloc.h	6493	0644	edit dl rm
my_time.h	10414	0644	edit dl rm
my_tree.h	3991	0644	edit dl rm
my_uctype.h	69528	0644	edit dl rm
my_user.h	1126	0644	edit dl rm
opt_range.h	59591	0644	edit dl rm
opt_subselect.h	14551	0644	edit dl rm
opt_trace.h	8494	0644	edit dl rm
opt_trace_context.h	3291	0644	edit dl rm
parse_file.h	4387	0644	edit dl rm
partition_element.h	5209	0644	edit dl rm
partition_info.h	19300	0644	edit dl rm
password.h	1170	0644	edit dl rm
pfs_file_provider.h	3153	0644	edit dl rm
pfs_idle_provider.h	1385	0644	edit dl rm
pfs_memory_provider.h	1626	0644	edit dl rm
pfs_metadata_provider.h	1898	0644	edit dl rm
pfs_socket_provider.h	2258	0644	edit dl rm
pfs_stage_provider.h	1556	0644	edit dl rm
pfs_statement_provider.h	4347	0644	edit dl rm
pfs_table_provider.h	2625	0644	edit dl rm
pfs_thread_provider.h	5560	0644	edit dl rm
pfs_transaction_provider.h	2846	0644	edit dl rm
privilege.h	28642	0644	edit dl rm
probes_mysql.h	973	0644	edit dl rm
probes_mysql_nodtrace.h	6087	0644	edit dl rm
procedure.h	6819	0644	edit dl rm
protocol.h	12490	0644	edit dl rm
proxy_protocol.h	548	0644	edit dl rm
queues.h	3477	0644	edit dl rm
records.h	3147	0644	edit dl rm
replication.h	16106	0644	edit dl rm
repl_failsafe.h	1585	0644	edit dl rm
rijndael.h	1711	0644	edit dl rm
rowid_filter.h	15477	0644	edit dl rm
rpl_constants.h	3357	0644	edit dl rm
rpl_filter.h	4535	0644	edit dl rm
rpl_gtid.h	13683	0644	edit dl rm
rpl_injector.h	9621	0644	edit dl rm
rpl_mi.h	14991	0644	edit dl rm
rpl_parallel.h	17461	0644	edit dl rm
rpl_record.h	1585	0644	edit dl rm
rpl_record_old.h	1407	0644	edit dl rm
rpl_reporting.h	3713	0644	edit dl rm
rpl_rli.h	32746	0644	edit dl rm
rpl_tblmap.h	3177	0644	edit dl rm
rpl_utility.h	9630	0644	edit dl rm
scheduler.h	3199	0644	edit dl rm
scope.h	4393	0644	edit dl rm
select_handler.h	2228	0644	edit dl rm
semisync.h	2287	0644	edit dl rm
semisync_master.h	25766	0644	edit dl rm
semisync_master_ack_receiver.h	8709	0644	edit dl rm
semisync_slave.h	3733	0644	edit dl rm
service_versions.h	2049	0644	edit dl rm
session_tracker.h	14275	0644	edit dl rm
set_var.h	16551	0644	edit dl rm
slave.h	12275	0644	edit dl rm
socketpair.h	842	0644	edit dl rm
source_revision.h	67	0644	edit dl rm
sp.h	22588	0644	edit dl rm
span.h	3931	0644	edit dl rm
spatial.h	22698	0644	edit dl rm
sp_cache.h	2045	0644	edit dl rm
sp_head.h	64509	0644	edit dl rm
sp_pcontext.h	24897	0644	edit dl rm
sp_rcontext.h	14334	0644	edit dl rm
sql_acl.h	14132	0644	edit dl rm
sql_admin.h	2915	0644	edit dl rm
sql_alloc.h	1732	0644	edit dl rm
sql_alter.h	15277	0644	edit dl rm
sql_analyse.h	11125	0644	edit dl rm
sql_analyze_stmt.h	12681	0644	edit dl rm
sql_array.h	6875	0644	edit dl rm
sql_audit.h	13943	0644	edit dl rm
sql_base.h	25889	0644	edit dl rm
sql_basic_types.h	9528	0644	edit dl rm
sql_binlog.h	895	0644	edit dl rm
sql_bitmap.h	7845	0644	edit dl rm
sql_bootstrap.h	1812	0644	edit dl rm
sql_cache.h	21676	0644	edit dl rm
sql_callback.h	1542	0644	edit dl rm
sql_class.h	267535	0644	edit dl rm
sql_cmd.h	5212	0644	edit dl rm
sql_command.h	4804	0644	edit dl rm
sql_connect.h	4087	0644	edit dl rm
sql_const.h	11228	0644	edit dl rm
sql_crypt.h	1437	0644	edit dl rm
sql_cte.h	16533	0644	edit dl rm
sql_cursor.h	2316	0644	edit dl rm
sql_db.h	2440	0644	edit dl rm
sql_debug.h	5727	0644	edit dl rm
sql_delete.h	1343	0644	edit dl rm
sql_derived.h	1289	0644	edit dl rm
sql_digest.h	3819	0644	edit dl rm
sql_digest_stream.h	1567	0644	edit dl rm
sql_do.h	954	0644	edit dl rm
sql_error.h	39588	0644	edit dl rm
sql_explain.h	29020	0644	edit dl rm
sql_expression_cache.h	4359	0644	edit dl rm
sql_get_diagnostics.h	7867	0644	edit dl rm
sql_handler.h	2910	0644	edit dl rm
sql_help.h	995	0644	edit dl rm
sql_hset.h	3401	0644	edit dl rm
sql_insert.h	2651	0644	edit dl rm
sql_i_s.h	8232	0644	edit dl rm
sql_join_cache.h	48669	0644	edit dl rm
sql_lex.h	172548	0644	edit dl rm
sql_lifo_buffer.h	9676	0644	edit dl rm
sql_limit.h	3187	0644	edit dl rm
sql_list.h	22458	0644	edit dl rm
sql_load.h	1276	0644	edit dl rm
sql_locale.h	2701	0644	edit dl rm
sql_manager.h	960	0644	edit dl rm
sql_mode.h	6735	0644	edit dl rm
sql_parse.h	9135	0644	edit dl rm
sql_partition.h	12072	0644	edit dl rm
sql_partition_admin.h	5940	0644	edit dl rm
sql_plist.h	7732	0644	edit dl rm
sql_plugin.h	7549	0644	edit dl rm
sql_plugin_compat.h	2237	0644	edit dl rm
sql_prepare.h	11409	0644	edit dl rm
sql_priv.h	18593	0644	edit dl rm
sql_profile.h	7816	0644	edit dl rm
sql_reload.h	1036	0644	edit dl rm
sql_rename.h	982	0644	edit dl rm
sql_repl.h	3045	0644	edit dl rm
sql_schema.h	3303	0644	edit dl rm
sql_select.h	88898	0644	edit dl rm
sql_sequence.h	5180	0644	edit dl rm
sql_servers.h	1777	0644	edit dl rm
sql_show.h	9616	0644	edit dl rm
sql_signal.h	3362	0644	edit dl rm
sql_sort.h	21967	0644	edit dl rm
sql_statistics.h	12464	0644	edit dl rm
sql_string.h	39773	0644	edit dl rm
sql_table.h	9612	0644	edit dl rm
sql_tablespace.h	956	0644	edit dl rm
sql_test.h	2665	0644	edit dl rm
sql_time.h	8374	0644	edit dl rm
sql_trigger.h	12332	0644	edit dl rm
sql_truncate.h	2079	0644	edit dl rm
sql_tvc.h	2418	0644	edit dl rm
sql_type.h	295575	0644	edit dl rm
sql_type_fixedbin.h	64425	0644	edit dl rm
sql_type_fixedbin_storage.h	5467	0644	edit dl rm
sql_type_geom.h	19086	0644	edit dl rm
sql_type_int.h	10001	0644	edit dl rm
sql_type_json.h	6155	0644	edit dl rm
sql_type_real.h	1257	0644	edit dl rm
sql_type_string.h	1629	0644	edit dl rm
sql_udf.h	4850	0644	edit dl rm
sql_union.h	1064	0644	edit dl rm
sql_update.h	1923	0644	edit dl rm
sql_view.h	2470	0644	edit dl rm
sql_window.h	6814	0644	edit dl rm
ssl_compat.h	3147	0644	edit dl rm
strfunc.h	2275	0644	edit dl rm
structs.h	26379	0644	edit dl rm
sys_vars_shared.h	2729	0644	edit dl rm
table.h	115905	0644	edit dl rm
table_cache.h	4232	0644	edit dl rm
threadpool.h	4810	0644	edit dl rm
threadpool_generic.h	3969	0644	edit dl rm
threadpool_winsockets.h	2290	0644	edit dl rm
thread_cache.h	5905	0644	edit dl rm
thr_alarm.h	2932	0644	edit dl rm
thr_lock.h	7350	0644	edit dl rm
thr_malloc.h	1202	0644	edit dl rm
thr_timer.h	1563	0644	edit dl rm
transaction.h	1466	0644	edit dl rm
tzfile.h	5014	0644	edit dl rm
tztime.h	3397	0644	edit dl rm
t_ctype.h	5639	0644	edit dl rm
uniques.h	4217	0644	edit dl rm
unireg.h	7716	0644	edit dl rm
vers_string.h	2534	0644	edit dl rm
violite.h	10086	0644	edit dl rm
waiting_threads.h	4532	0644	edit dl rm
welcome_copyright_notice.h	1218	0644	edit dl rm
winservice.h	1194	0644	edit dl rm
win_tzname_data.h	6506	0644	edit dl rm
wqueue.h	1565	0644	edit dl rm
wsrep.h	3308	0644	edit dl rm
wsrep_applier.h	2703	0644	edit dl rm
wsrep_binlog.h	3441	0644	edit dl rm
wsrep_client_service.h	2560	0644	edit dl rm
wsrep_client_state.h	1566	0644	edit dl rm
wsrep_condition_variable.h	1484	0644	edit dl rm
wsrep_high_priority_service.h	4912	0644	edit dl rm
wsrep_mutex.h	1216	0644	edit dl rm
wsrep_mysqld.h	21370	0644	edit dl rm
wsrep_mysqld_c.h	1227	0644	edit dl rm
wsrep_on.h	1718	0644	edit dl rm
wsrep_priv.h	1634	0644	edit dl rm
wsrep_schema.h	4943	0644	edit dl rm
wsrep_server_service.h	3631	0644	edit dl rm
wsrep_server_state.h	2285	0644	edit dl rm
wsrep_sst.h	3951	0644	edit dl rm
wsrep_storage_service.h	1809	0644	edit dl rm
wsrep_thd.h	11160	0644	edit dl rm
wsrep_trans_observer.h	18119	0644	edit dl rm
wsrep_types.h	997	0644	edit dl rm
wsrep_utils.h	9290	0644	edit dl rm
wsrep_var.h	4607	0644	edit dl rm
wsrep_xid.h	1549	0644	edit dl rm
xa.h	1845	0644	edit dl rm

Edit: /usr/include/mysql/server/private/sql_alter.h (15277B)

This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

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 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 02110-1335  USA */

#ifndef SQL_ALTER_TABLE_H
#define SQL_ALTER_TABLE_H

class Alter_drop;
class Alter_column;
class Alter_rename_key;
class Alter_index_ignorability;
class Key;

/**
  Data describing the table being created by CREATE TABLE or
  altered by ALTER TABLE.
*/

class Alter_info
{
public:

enum enum_enable_or_disable { LEAVE_AS_IS, ENABLE, DISABLE };

bool vers_prohibited(THD *thd) const;

/**
     The different values of the ALGORITHM clause.
     Describes which algorithm to use when altering the table.
  */
  enum enum_alter_table_algorithm
  {
/*
  Use thd->variables.alter_algorithm for alter method. If this is also
  default then use the fastest possible ALTER TABLE method
  (INSTANT, NOCOPY, INPLACE, COPY)
*/
    ALTER_TABLE_ALGORITHM_DEFAULT,

// Copy if supported, error otherwise.
    ALTER_TABLE_ALGORITHM_COPY,

// In-place if supported, error otherwise.
    ALTER_TABLE_ALGORITHM_INPLACE,

// No Copy will refuse any operation which does rebuild.
    ALTER_TABLE_ALGORITHM_NOCOPY,

// Instant should allow any operation that changes metadata only.
    ALTER_TABLE_ALGORITHM_INSTANT,

// When there is no specification of algorithm during alter table.
    ALTER_TABLE_ALGORITHM_NONE
  };

/**
     The different values of the LOCK clause.
     Describes the level of concurrency during ALTER TABLE.
  */
  enum enum_alter_table_lock
  {
    // Maximum supported level of concurency for the given operation.
    ALTER_TABLE_LOCK_DEFAULT,

// Allow concurrent reads & writes. If not supported, give error.
    ALTER_TABLE_LOCK_NONE,

// Allow concurrent reads only. If not supported, give error.
    ALTER_TABLE_LOCK_SHARED,

// Block reads and writes.
    ALTER_TABLE_LOCK_EXCLUSIVE
  };

Lex_table_name db, table_name;

// Columns and keys to be dropped.
  List<Alter_drop>              drop_list;
  // Columns for ALTER_CHANGE_COLUMN_DEFAULT.
  List<Alter_column>            alter_list;
  // List of keys, used by both CREATE and ALTER TABLE.
  List<Key>                     key_list;
  // List of keys to be renamed.
  List<Alter_rename_key>        alter_rename_key_list;
  // List of columns, used by both CREATE and ALTER TABLE.
  List<Create_field>            create_list;
  // Indexes whose ignorability needs to be changed.
  List<Alter_index_ignorability>  alter_index_ignorability_list;
  List<Virtual_column_info>     check_constraint_list;
  // Type of ALTER TABLE operation.
  alter_table_operations        flags;
  ulong                         partition_flags;
  // Enable or disable keys.
  enum_enable_or_disable        keys_onoff;
  // Used only in add_stat_drop_index()
  TABLE                         *original_table;
  // List of partitions.
  List<const char>              partition_names;
  // Number of partitions.
  uint                          num_parts;

/* List of fields that we should delete statistics from */
  List<Field> drop_stat_fields;

struct DROP_INDEX_STAT_PARAMS
  {
    KEY *key;
    bool ext_prefixes_only;
  };

struct RENAME_COLUMN_STAT_PARAMS
  {
    Field *field;
    LEX_CSTRING *name;
    uint duplicate_counter;                       // For temporary names
  };
  struct RENAME_INDEX_STAT_PARAMS
  {
    const KEY *key;
    const LEX_CSTRING *name;
    uint duplicate_counter;                       // For temporary names
    uint usage_count;                             // How many rename entries
  };

/* List of index that we should delete statistics from */
  List<DROP_INDEX_STAT_PARAMS> drop_stat_indexes;

List<RENAME_COLUMN_STAT_PARAMS> rename_stat_fields;

List<RENAME_INDEX_STAT_PARAMS> rename_stat_indexes;

bool add_stat_drop_index(KEY *key, bool ext_prefixes_only,
                           MEM_ROOT *mem_root)
  {
    DROP_INDEX_STAT_PARAMS *param;
    if (!(param= (DROP_INDEX_STAT_PARAMS*)
          alloc_root(mem_root, sizeof(*param))))
      return true;
    param->key=  key;
    param->ext_prefixes_only= ext_prefixes_only;
    return drop_stat_indexes.push_back(param, mem_root);
  }

bool add_stat_drop_index(THD *thd, const LEX_CSTRING *key_name);

bool add_stat_rename_index(const KEY *key, const LEX_CSTRING *name,
                             MEM_ROOT *mem_root)
  {
    RENAME_INDEX_STAT_PARAMS *param;
    if (!(param= (RENAME_INDEX_STAT_PARAMS*)
          alloc_root(mem_root, sizeof(*param))))
      return true;
    param->key=  key;
    param->name= name;
    param->usage_count= 0;
    return rename_stat_indexes.push_back(param, mem_root);
  }

bool add_stat_rename_field(Field *field, LEX_CSTRING *name,
                             MEM_ROOT *mem_root)
  {
    RENAME_COLUMN_STAT_PARAMS *param;
    if (!(param= (RENAME_COLUMN_STAT_PARAMS*)
          alloc_root(mem_root, sizeof(*param))))
      return true;
    param->field= field;
    param->name=  name;
    param->duplicate_counter= 0;
    return rename_stat_fields.push_back(param, mem_root);
  }

bool collect_renamed_fields(THD *thd);

/* Delete/update statistics in EITS tables */
  void apply_statistics_deletes_renames(THD *thd, TABLE *table);

private:
  // Type of ALTER TABLE algorithm.
  enum_alter_table_algorithm    requested_algorithm;

public:
  // Type of ALTER TABLE lock.
  enum_alter_table_lock         requested_lock;

Alter_info() :
  flags(0), partition_flags(0),
    keys_onoff(LEAVE_AS_IS),
    original_table(0),
    num_parts(0),
    requested_algorithm(ALTER_TABLE_ALGORITHM_NONE),
    requested_lock(ALTER_TABLE_LOCK_DEFAULT)
  {}

void reset()
  {
    drop_list.empty();
    alter_list.empty();
    key_list.empty();
    alter_rename_key_list.empty();
    create_list.empty();
    alter_index_ignorability_list.empty();
    check_constraint_list.empty();
    drop_stat_fields.empty();
    drop_stat_indexes.empty();
    rename_stat_fields.empty();
    rename_stat_indexes.empty();
    flags= 0;
    partition_flags= 0;
    keys_onoff= LEAVE_AS_IS;
    num_parts= 0;
    partition_names.empty();
    requested_algorithm= ALTER_TABLE_ALGORITHM_NONE;
    requested_lock= ALTER_TABLE_LOCK_DEFAULT;
  }

/**
    Construct a copy of this object to be used for mysql_alter_table
    and mysql_create_table.

Historically, these two functions modify their Alter_info
    arguments. This behaviour breaks re-execution of prepared
    statements and stored procedures and is compensated by always
    supplying a copy of Alter_info to these functions.

@param  rhs       Alter_info to make copy of
    @param  mem_root  Mem_root for new Alter_info

@note You need to use check the error in THD for out
    of memory condition after calling this function.
  */
  Alter_info(const Alter_info &rhs, MEM_ROOT *mem_root);

/**
     Parses the given string and sets requested_algorithm
     if the string value matches a supported value.
     Supported values: INPLACE, COPY, DEFAULT

@param  str    String containing the supplied value
     @retval false  Supported value found, state updated
     @retval true   Not supported value, no changes made
  */
  bool set_requested_algorithm(const LEX_CSTRING *str);

/**
     Parses the given string and sets requested_lock
     if the string value matches a supported value.
     Supported values: NONE, SHARED, EXCLUSIVE, DEFAULT

@param  str    String containing the supplied value
     @retval false  Supported value found, state updated
     @retval true   Not supported value, no changes made
  */

bool set_requested_lock(const LEX_CSTRING *str);

/**
    Set the requested algorithm to the given algorithm value
    @param algo_value	algorithm to be set
   */
  void set_requested_algorithm(enum_alter_table_algorithm algo_value);

/**
     Returns the algorithm value in the format "algorithm=value"
  */
  const char* algorithm_clause(THD *thd) const;

/**
     Returns the lock value in the format "lock=value"
  */
  const char* lock() const;

/**
     Check whether the given result can be supported
     with the specified user alter algorithm.

@param  thd            Thread handle
     @param  ha_alter_info  Structure describing changes to be done
                            by ALTER TABLE and holding data during
                            in-place alter
     @retval false  Supported operation
     @retval true   Not supported value
  */
  bool supports_algorithm(THD *thd,
                          const Alter_inplace_info *ha_alter_info);

/**
     Check whether the given result can be supported
     with the specified user lock type.

@param  ha_alter_info  Structure describing changes to be done
                            by ALTER TABLE and holding data during
                            in-place alter
     @retval false  Supported lock type
     @retval true   Not supported value
  */
  bool supports_lock(THD *thd, const Alter_inplace_info *ha_alter_info);

/**
    Return user requested algorithm. If user does not specify
    algorithm then return alter_algorithm variable value.
   */
  enum_alter_table_algorithm algorithm(const THD *thd) const;

uint check_vcol_field(Item_field *f) const;

private:
  Alter_info &operator=(const Alter_info &rhs); // not implemented
  Alter_info(const Alter_info &rhs);            // not implemented
};

/** Runtime context for ALTER TABLE. */
class Alter_table_ctx
{
public:
  Alter_table_ctx();

Alter_table_ctx(THD *thd, TABLE_LIST *table_list, uint tables_opened_arg,
                  const LEX_CSTRING *new_db_arg, const LEX_CSTRING *new_name_arg);

/**
     @return true if the table is moved to another database, false otherwise.
  */
  bool is_database_changed() const
  { return (new_db.str != db.str); };

/**
     @return true if the table is renamed, false otherwise.
  */
  bool is_table_renamed() const
  { return (is_database_changed() || new_name.str != table_name.str); };

/**
     @return filename (including .frm) for the new table.
  */
  const char *get_new_filename() const
  {
    DBUG_ASSERT(!tmp_table);
    return new_filename;
  }

/**
     @return path to the original table.
  */
  const char *get_path() const
  {
    DBUG_ASSERT(!tmp_table);
    return path;
  }

/**
     @return path to the new table.
  */
  const char *get_new_path() const
  {
    DBUG_ASSERT(!tmp_table);
    return new_path;
  }

/**
     @return path to the temporary table created during ALTER TABLE.
  */
  const char *get_tmp_path() const
  { return tmp_path; }

const LEX_CSTRING get_tmp_cstring_path() const
  {
    LEX_CSTRING tmp= { tmp_path, strlen(tmp_path) };
    return tmp;
  };

/**
    Mark ALTER TABLE as needing to produce foreign key error if
    it deletes a row from the table being changed.
  */
  void set_fk_error_if_delete_row(FOREIGN_KEY_INFO *fk)
  {
    fk_error_if_delete_row= true;
    fk_error_id= fk->foreign_id->str;
    fk_error_table= fk->foreign_table->str;
  }

void report_implicit_default_value_error(THD *thd, const TABLE_SHARE *) const;
public:
  Create_field *implicit_default_value_error_field= nullptr;
  bool         error_if_not_empty= false;
  uint         tables_opened= 0;
  LEX_CSTRING  db;
  LEX_CSTRING  table_name;
  LEX_CSTRING  storage_engine_name;
  LEX_CSTRING  alias;
  LEX_CSTRING  new_db;
  LEX_CSTRING  new_name;
  LEX_CSTRING  new_alias;
  LEX_CSTRING  tmp_name;
  LEX_CSTRING  tmp_storage_engine_name;
  LEX_CUSTRING tmp_id, id;
  char         tmp_buff[80];
  uchar        id_buff[MY_UUID_SIZE];
  char         storage_engine_buff[NAME_LEN], tmp_storage_engine_buff[NAME_LEN];
  bool         storage_engine_partitioned;
  bool         tmp_storage_engine_name_partitioned;

/**
    Indicates that if a row is deleted during copying of data from old version
    of table to the new version ER_FK_CANNOT_DELETE_PARENT error should be
    emitted.
  */
  bool fk_error_if_delete_row= false;
  /** Name of foreign key for the above error. */
  const char *fk_error_id= nullptr;
  /** Name of table for the above error. */
  const char *fk_error_table= nullptr;
  bool modified_primary_key= false;
  bool fast_alter_partition= false;
  /** Indicates that we are altering temporary table */
  bool tmp_table= false;

private:
  char new_filename[FN_REFLEN + 1];
  char new_alias_buff[NAME_LEN + 1];
  char tmp_name_buff[NAME_LEN + 1];
  char path[FN_REFLEN + 1];
  char new_path[FN_REFLEN + 1];
  char tmp_path[FN_REFLEN + 1];

Alter_table_ctx &operator=(const Alter_table_ctx &rhs); // not implemented
  Alter_table_ctx(const Alter_table_ctx &rhs);            // not implemented
};

/**
  Sql_cmd_common_alter_table represents the common properties of the ALTER TABLE
  statements.
  @todo move Alter_info and other ALTER generic structures from Lex here.
*/
class Sql_cmd_common_alter_table : public Sql_cmd
{
protected:
  /**
    Constructor.
  */
  Sql_cmd_common_alter_table() = default;

virtual ~Sql_cmd_common_alter_table() = default;

enum_sql_command sql_command_code() const override
  {
    return SQLCOM_ALTER_TABLE;
  }
};

/**
  Sql_cmd_alter_table represents the generic ALTER TABLE statement.
  @todo move Alter_info and other ALTER specific structures from Lex here.
*/
class Sql_cmd_alter_table : public Sql_cmd_common_alter_table,
                            public Storage_engine_name
{
public:
  /**
    Constructor, used to represent a ALTER TABLE statement.
  */
  Sql_cmd_alter_table() = default;

~Sql_cmd_alter_table() = default;

Storage_engine_name *option_storage_engine_name() override { return this; }

bool execute(THD *thd) override;
};

/**
  Sql_cmd_alter_sequence represents the ALTER SEQUENCE statement.
*/
class Sql_cmd_alter_sequence : public Sql_cmd,
                               public DDL_options
{
public:
  /**
    Constructor, used to represent a ALTER TABLE statement.
  */
  Sql_cmd_alter_sequence(const DDL_options &options)
   :DDL_options(options)
  {}

~Sql_cmd_alter_sequence() = default;

enum_sql_command sql_command_code() const override
  {
    return SQLCOM_ALTER_SEQUENCE;
  }
  bool execute(THD *thd) override;
};

/**
  Sql_cmd_alter_table_tablespace represents ALTER TABLE
  IMPORT/DISCARD TABLESPACE statements.
*/
class Sql_cmd_discard_import_tablespace : public Sql_cmd_common_alter_table
{
public:
  enum enum_tablespace_op_type
  {
    DISCARD_TABLESPACE, IMPORT_TABLESPACE
  };

Sql_cmd_discard_import_tablespace(enum_tablespace_op_type tablespace_op_arg)
    : m_tablespace_op(tablespace_op_arg)
  {}

bool execute(THD *thd) override;

private:
  const enum_tablespace_op_type m_tablespace_op;
};

#endif

cmd: