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ðŸ“ ..
ðŸ“„ aligned.h(1.11 KB)
ðŸ“„ aria_backup.h(1.51 KB)
ðŸ“„ assume_aligned.h(2.29 KB)
ðŸ“ atomic
ðŸ“„ authors.h(9.9 KB)
ðŸ“„ backup.h(1.66 KB)
ðŸ“„ bounded_queue.h(5.95 KB)
ðŸ“„ client_settings.h(1.89 KB)
ðŸ“„ compat56.h(2.23 KB)
ðŸ“„ config.h(14.23 KB)
ðŸ“„ contributors.h(4.76 KB)
ðŸ“„ create_options.h(4.42 KB)
ðŸ“„ create_tmp_table.h(2.74 KB)
ðŸ“„ cset_narrowing.h(3.88 KB)
ðŸ“„ custom_conf.h(1.06 KB)
ðŸ“„ datadict.h(1.66 KB)
ðŸ“„ ddl_log.h(12.39 KB)
ðŸ“„ debug.h(1.21 KB)
ðŸ“„ debug_sync.h(2 KB)
ðŸ“„ derived_handler.h(2.32 KB)
ðŸ“„ derror.h(980 B)
ðŸ“„ des_key_file.h(1.21 KB)
ðŸ“„ discover.h(1.53 KB)
ðŸ“„ dur_prop.h(1.06 KB)
ðŸ“„ embedded_priv.h(1.69 KB)
ðŸ“„ event_data_objects.h(4.09 KB)
ðŸ“„ event_db_repository.h(3.56 KB)
ðŸ“„ event_parse_data.h(2.83 KB)
ðŸ“„ event_queue.h(3.36 KB)
ðŸ“„ event_scheduler.h(3.21 KB)
ðŸ“„ events.h(4.59 KB)
ðŸ“„ field.h(215.25 KB)
ðŸ“„ field_comp.h(1.15 KB)
ðŸ“„ filesort.h(7.11 KB)
ðŸ“„ filesort_utils.h(8 KB)
ðŸ“„ ft_global.h(3.04 KB)
ðŸ“„ gcalc_slicescan.h(16.87 KB)
ðŸ“„ gcalc_tools.h(11.62 KB)
ðŸ“„ grant.h(2.69 KB)
ðŸ“„ group_by_handler.h(3.45 KB)
ðŸ“„ gstream.h(2.38 KB)
ðŸ“„ ha_handler_stats.h(2.28 KB)
ðŸ“„ ha_partition.h(62.9 KB)
ðŸ“„ ha_sequence.h(6.1 KB)
ðŸ“„ handle_connections_win.h(884 B)
ðŸ“„ handler.h(196.46 KB)
ðŸ“„ hash.h(4.34 KB)
ðŸ“„ hash_filo.h(5.55 KB)
ðŸ“„ heap.h(9.26 KB)
ðŸ“„ hostname.h(5.29 KB)
ðŸ“„ ilist.h(6.88 KB)
ðŸ“„ init.h(852 B)
ðŸ“„ innodb_priv.h(1.29 KB)
ðŸ“„ item.h(272.64 KB)
ðŸ“„ item_cmpfunc.h(131.86 KB)
ðŸ“„ item_create.h(11.23 KB)
ðŸ“„ item_func.h(133.45 KB)
ðŸ“„ item_geofunc.h(37.99 KB)
ðŸ“„ item_jsonfunc.h(21.99 KB)
ðŸ“„ item_row.h(5.1 KB)
ðŸ“„ item_strfunc.h(70.55 KB)
ðŸ“„ item_subselect.h(57.77 KB)
ðŸ“„ item_sum.h(70.59 KB)
ðŸ“„ item_timefunc.h(63.1 KB)
ðŸ“„ item_vers.h(4.23 KB)
ðŸ“„ item_windowfunc.h(33.51 KB)
ðŸ“„ item_xmlfunc.h(4.5 KB)
ðŸ“„ json_table.h(9.28 KB)
ðŸ“„ key.h(2.08 KB)
ðŸ“„ keycaches.h(1.95 KB)
ðŸ“„ lex.h(29.13 KB)
ðŸ“„ lex_string.h(3.97 KB)
ðŸ“„ lex_symbol.h(1.29 KB)
ðŸ“„ lf.h(6.31 KB)
ðŸ“„ lock.h(2.15 KB)
ðŸ“„ log.h(45 KB)
ðŸ“„ log_event.h(182.04 KB)
ðŸ“„ log_event_data_type.h(1.85 KB)
ðŸ“„ log_event_old.h(19.37 KB)
ðŸ“„ log_slow.h(2.38 KB)
ðŸ“„ maria.h(5.73 KB)
ðŸ“„ mariadb.h(1.25 KB)
ðŸ“„ mdl.h(37.57 KB)
ðŸ“„ mem_root_array.h(6.94 KB)
ðŸ“„ message.h(1.17 KB)
ðŸ“„ multi_range_read.h(22.64 KB)
ðŸ“„ my_alarm.h(2.37 KB)
ðŸ“„ my_apc.h(4.64 KB)
ðŸ“„ my_atomic.h(7.11 KB)
ðŸ“„ my_atomic_wrapper.h(2.98 KB)
ðŸ“„ my_base.h(26.57 KB)
ðŸ“„ my_bit.h(6.05 KB)
ðŸ“„ my_bitmap.h(5.74 KB)
ðŸ“„ my_check_opt.h(2.56 KB)
ðŸ“„ my_compare.h(10.93 KB)
ðŸ“„ my_counter.h(1.68 KB)
ðŸ“„ my_cpu.h(4.74 KB)
ðŸ“„ my_crypt.h(904 B)
ðŸ“„ my_decimal.h(14.15 KB)
ðŸ“„ my_default.h(1.84 KB)
ðŸ“„ my_handler_errors.h(4.77 KB)
ðŸ“„ my_json_writer.h(17.95 KB)
ðŸ“„ my_libwrap.h(1.16 KB)
ðŸ“„ my_md5.h(1.45 KB)
ðŸ“„ my_minidump.h(848 B)
ðŸ“„ my_nosys.h(1.4 KB)
ðŸ“„ my_rdtsc.h(8.23 KB)
ðŸ“„ my_rnd.h(1.04 KB)
ðŸ“„ my_service_manager.h(2 KB)
ðŸ“„ my_stack_alloc.h(6.34 KB)
ðŸ“„ my_stacktrace.h(3.14 KB)
ðŸ“„ my_time.h(10.22 KB)
ðŸ“„ my_tree.h(3.9 KB)
ðŸ“„ my_uctype.h(67.9 KB)
ðŸ“„ my_user.h(1.1 KB)
ðŸ“„ myisam.h(17.1 KB)
ðŸ“„ myisamchk.h(4.61 KB)
ðŸ“„ myisammrg.h(4.78 KB)
ðŸ“„ myisampack.h(14.58 KB)
ðŸ“„ mysqld.h(39.55 KB)
ðŸ“„ mysqld_default_groups.h(204 B)
ðŸ“„ mysqld_suffix.h(1.17 KB)
ðŸ“„ mysys_err.h(2.95 KB)
ðŸ“„ opt_range.h(58.19 KB)
ðŸ“„ opt_subselect.h(14.21 KB)
ðŸ“„ opt_trace.h(8.29 KB)
ðŸ“„ opt_trace_context.h(3.21 KB)
ðŸ“„ parse_file.h(4.28 KB)
ðŸ“„ partition_element.h(5.09 KB)
ðŸ“„ partition_info.h(18.85 KB)
ðŸ“„ password.h(1.14 KB)
ðŸ“„ pfs_file_provider.h(3.08 KB)
ðŸ“„ pfs_idle_provider.h(1.35 KB)
ðŸ“„ pfs_memory_provider.h(1.59 KB)
ðŸ“„ pfs_metadata_provider.h(1.85 KB)
ðŸ“„ pfs_socket_provider.h(2.21 KB)
ðŸ“„ pfs_stage_provider.h(1.52 KB)
ðŸ“„ pfs_statement_provider.h(4.25 KB)
ðŸ“„ pfs_table_provider.h(2.56 KB)
ðŸ“„ pfs_thread_provider.h(5.43 KB)
ðŸ“„ pfs_transaction_provider.h(2.78 KB)
ðŸ“„ privilege.h(27.97 KB)
ðŸ“„ probes_mysql.h(973 B)
ðŸ“„ probes_mysql_dtrace.h(32.23 KB)
ðŸ“„ probes_mysql_nodtrace.h(4.89 KB)
ðŸ“„ procedure.h(6.63 KB)
ðŸ“„ protocol.h(12.2 KB)
ðŸ“„ proxy_protocol.h(548 B)
ðŸ“„ queues.h(3.4 KB)
ðŸ“„ records.h(3.07 KB)
ðŸ“„ repl_failsafe.h(1.55 KB)
ðŸ“„ replication.h(15.73 KB)
ðŸ“„ rijndael.h(1.67 KB)
ðŸ“„ rowid_filter.h(15.11 KB)
ðŸ“„ rpl_constants.h(3.28 KB)
ðŸ“„ rpl_filter.h(4.43 KB)
ðŸ“„ rpl_gtid.h(13.36 KB)
ðŸ“„ rpl_injector.h(9.4 KB)
ðŸ“„ rpl_mi.h(14.64 KB)
ðŸ“„ rpl_parallel.h(17.05 KB)
ðŸ“„ rpl_record.h(1.55 KB)
ðŸ“„ rpl_record_old.h(1.37 KB)
ðŸ“„ rpl_reporting.h(3.63 KB)
ðŸ“„ rpl_rli.h(31.98 KB)
ðŸ“„ rpl_tblmap.h(3.1 KB)
ðŸ“„ rpl_utility.h(9.4 KB)
ðŸ“„ scheduler.h(3.12 KB)
ðŸ“„ scope.h(4.29 KB)
ðŸ“„ select_handler.h(2.18 KB)
ðŸ“„ semisync.h(2.23 KB)
ðŸ“„ semisync_master.h(24.96 KB)
ðŸ“„ semisync_master_ack_receiver.h(8.5 KB)
ðŸ“„ semisync_slave.h(3.65 KB)
ðŸ“„ service_versions.h(2 KB)
ðŸ“„ session_tracker.h(13.94 KB)
ðŸ“„ set_var.h(16.16 KB)
ðŸ“„ slave.h(11.99 KB)
ðŸ“„ socketpair.h(842 B)
ðŸ“„ source_revision.h(67 B)
ðŸ“„ sp.h(22.06 KB)
ðŸ“„ sp_cache.h(2 KB)
ðŸ“„ sp_head.h(63 KB)
ðŸ“„ sp_pcontext.h(24.31 KB)
ðŸ“„ sp_rcontext.h(14 KB)
ðŸ“„ span.h(3.84 KB)
ðŸ“„ spatial.h(21.78 KB)
ðŸ“„ sql_acl.h(13.8 KB)
ðŸ“„ sql_admin.h(2.85 KB)
ðŸ“„ sql_alloc.h(1.69 KB)
ðŸ“„ sql_alter.h(14.92 KB)
ðŸ“„ sql_analyse.h(10.86 KB)
ðŸ“„ sql_analyze_stmt.h(12.38 KB)
ðŸ“„ sql_array.h(6.71 KB)
ðŸ“„ sql_audit.h(13.62 KB)
ðŸ“„ sql_base.h(25.27 KB)
ðŸ“„ sql_basic_types.h(9.3 KB)
ðŸ“„ sql_binlog.h(895 B)
ðŸ“„ sql_bitmap.h(7.66 KB)
ðŸ“„ sql_bootstrap.h(1.77 KB)
ðŸ“„ sql_cache.h(21.17 KB)
ðŸ“„ sql_callback.h(1.51 KB)
ðŸ“„ sql_class.h(261.11 KB)
ðŸ“„ sql_cmd.h(9.2 KB)
ðŸ“„ sql_connect.h(3.99 KB)
ðŸ“„ sql_const.h(10.96 KB)
ðŸ“„ sql_crypt.h(1.4 KB)
ðŸ“„ sql_cte.h(16.15 KB)
ðŸ“„ sql_cursor.h(2.26 KB)
ðŸ“„ sql_db.h(2.38 KB)
ðŸ“„ sql_debug.h(5.51 KB)
ðŸ“„ sql_delete.h(1.31 KB)
ðŸ“„ sql_derived.h(1.26 KB)
ðŸ“„ sql_digest.h(3.73 KB)
ðŸ“„ sql_digest_stream.h(1.53 KB)
ðŸ“„ sql_do.h(954 B)
ðŸ“„ sql_error.h(38.66 KB)
ðŸ“„ sql_explain.h(28.34 KB)
ðŸ“„ sql_expression_cache.h(4.26 KB)
ðŸ“„ sql_get_diagnostics.h(7.68 KB)
ðŸ“„ sql_handler.h(2.84 KB)
ðŸ“„ sql_help.h(995 B)
ðŸ“„ sql_hset.h(3.32 KB)
ðŸ“„ sql_i_s.h(8.04 KB)
ðŸ“„ sql_insert.h(2.59 KB)
ðŸ“„ sql_join_cache.h(47.53 KB)
ðŸ“„ sql_lex.h(168.5 KB)
ðŸ“„ sql_lifo_buffer.h(9.45 KB)
ðŸ“„ sql_limit.h(3.11 KB)
ðŸ“„ sql_list.h(21.93 KB)
ðŸ“„ sql_load.h(1.25 KB)
ðŸ“„ sql_locale.h(2.64 KB)
ðŸ“„ sql_manager.h(960 B)
ðŸ“„ sql_mode.h(6.58 KB)
ðŸ“„ sql_parse.h(8.43 KB)
ðŸ“„ sql_partition.h(11.79 KB)
ðŸ“„ sql_partition_admin.h(5.8 KB)
ðŸ“„ sql_plist.h(7.55 KB)
ðŸ“„ sql_plugin.h(7.37 KB)
ðŸ“„ sql_plugin_compat.h(2.18 KB)
ðŸ“„ sql_prepare.h(11.14 KB)
ðŸ“„ sql_priv.h(18.16 KB)
ðŸ“„ sql_profile.h(7.63 KB)
ðŸ“„ sql_reload.h(1.01 KB)
ðŸ“„ sql_rename.h(982 B)
ðŸ“„ sql_repl.h(2.97 KB)
ðŸ“„ sql_schema.h(3.23 KB)
ðŸ“„ sql_select.h(86.81 KB)
ðŸ“„ sql_sequence.h(5.06 KB)
ðŸ“„ sql_servers.h(1.74 KB)
ðŸ“„ sql_show.h(9.39 KB)
ðŸ“„ sql_signal.h(3.28 KB)
ðŸ“„ sql_sort.h(21.45 KB)
ðŸ“„ sql_statistics.h(12.16 KB)
ðŸ“„ sql_string.h(38.84 KB)
ðŸ“„ sql_table.h(9.39 KB)
ðŸ“„ sql_tablespace.h(956 B)
ðŸ“„ sql_test.h(1.55 KB)
ðŸ“„ sql_time.h(8.18 KB)
ðŸ“„ sql_trigger.h(12.04 KB)
ðŸ“„ sql_truncate.h(2.03 KB)
ðŸ“„ sql_tvc.h(2.36 KB)
ðŸ“„ sql_type.h(288.51 KB)
ðŸ“„ sql_type_fixedbin.h(62.81 KB)
ðŸ“„ sql_type_fixedbin_storage.h(5.34 KB)
ðŸ“„ sql_type_geom.h(18.64 KB)
ðŸ“„ sql_type_int.h(9.77 KB)
ðŸ“„ sql_type_json.h(6.01 KB)
ðŸ“„ sql_type_real.h(1.23 KB)
ðŸ“„ sql_type_string.h(1.59 KB)
ðŸ“„ sql_udf.h(4.74 KB)
ðŸ“„ sql_union.h(1.04 KB)
ðŸ“„ sql_update.h(1.88 KB)
ðŸ“„ sql_view.h(2.41 KB)
ðŸ“„ sql_window.h(6.65 KB)
ðŸ“„ ssl_compat.h(3.07 KB)
ðŸ“„ strfunc.h(2.22 KB)
ðŸ“„ structs.h(25.76 KB)
ðŸ“„ sys_vars_shared.h(2.67 KB)
ðŸ“„ t_ctype.h(5.51 KB)
ðŸ“„ table.h(113.03 KB)
ðŸ“„ table_cache.h(4.13 KB)
ðŸ“„ thr_alarm.h(2.86 KB)
ðŸ“„ thr_lock.h(7.18 KB)
ðŸ“„ thr_malloc.h(1.17 KB)
ðŸ“„ thr_timer.h(1.53 KB)
ðŸ“„ thread_cache.h(5.77 KB)
ðŸ“„ threadpool.h(4.7 KB)
ðŸ“„ threadpool_generic.h(3.88 KB)
ðŸ“„ threadpool_winsockets.h(2.24 KB)
ðŸ“„ transaction.h(1.43 KB)
ðŸ“„ tzfile.h(4.9 KB)
ðŸ“„ tztime.h(3.32 KB)
ðŸ“„ uniques.h(4.12 KB)
ðŸ“„ unireg.h(7.54 KB)
ðŸ“„ vers_string.h(2.47 KB)
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ðŸ“„ waiting_threads.h(4.43 KB)
ðŸ“„ welcome_copyright_notice.h(1.19 KB)
ðŸ“„ win_tzname_data.h(6.35 KB)
ðŸ“„ winservice.h(1.17 KB)
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ðŸ“„ wsrep_binlog.h(3.36 KB)
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ðŸ“„ wsrep_client_state.h(1.53 KB)
ðŸ“„ wsrep_condition_variable.h(1.45 KB)
ðŸ“„ wsrep_high_priority_service.h(4.8 KB)
ðŸ“„ wsrep_mutex.h(1.19 KB)
ðŸ“„ wsrep_mysqld.h(20.64 KB)
ðŸ“„ wsrep_mysqld_c.h(1.2 KB)
ðŸ“„ wsrep_on.h(1.68 KB)
ðŸ“„ wsrep_priv.h(1.6 KB)
ðŸ“„ wsrep_schema.h(4.83 KB)
ðŸ“„ wsrep_server_service.h(3.55 KB)
ðŸ“„ wsrep_server_state.h(2.23 KB)
ðŸ“„ wsrep_sst.h(3.86 KB)
ðŸ“„ wsrep_storage_service.h(1.77 KB)
ðŸ“„ wsrep_thd.h(10.9 KB)
ðŸ“„ wsrep_trans_observer.h(17.69 KB)
ðŸ“„ wsrep_types.h(997 B)
ðŸ“„ wsrep_utils.h(9.07 KB)
ðŸ“„ wsrep_var.h(4.5 KB)
ðŸ“„ wsrep_xid.h(1.51 KB)
ðŸ“„ xa.h(1.8 KB)

Editing: sql_alter.h

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

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