FM / private

/usr/include/mysql/server/private

Name	Size	Mode	Actions
atomic/	-	0755	rm
data/	-	0755	rm
providers/	-	0755	rm
aligned.h	1136	0644	edit dl rm
aria_backup.h	1787	0644	edit dl rm
assume_aligned.h	2350	0644	edit dl rm
authors.h	10194	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	14351	0644	edit dl rm
contributors.h	4931	0644	edit dl rm
create_options.h	4193	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	12807	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	222414	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	199857	0644	edit dl rm
handle_connections_win.h	884	0644	edit dl rm
hash.h	4452	0644	edit dl rm
hash_filo.h	5599	0644	edit dl rm
ha_handler_stats.h	2335	0644	edit dl rm
ha_partition.h	64696	0644	edit dl rm
ha_sequence.h	6245	0644	edit dl rm
heap.h	9487	0644	edit dl rm
hostname.h	5419	0644	edit dl rm
ilist.h	7237	0644	edit dl rm
init.h	852	0644	edit dl rm
innodb_priv.h	1319	0644	edit dl rm
item.h	285458	0644	edit dl rm
item_cmpfunc.h	135218	0644	edit dl rm
item_create.h	11508	0644	edit dl rm
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item_jsonfunc.h	25429	0644	edit dl rm
item_row.h	5229	0644	edit dl rm
item_strfunc.h	75265	0644	edit dl rm
item_subselect.h	59087	0644	edit dl rm
item_sum.h	72695	0644	edit dl rm
item_timefunc.h	65896	0644	edit dl rm
item_vers.h	4413	0644	edit dl rm
item_windowfunc.h	35089	0644	edit dl rm
item_xmlfunc.h	4650	0644	edit dl rm
json_table.h	9667	0644	edit dl rm
key.h	2132	0644	edit dl rm
keycaches.h	1995	0644	edit dl rm
lex.h	29840	0644	edit dl rm
lex_charset.h	24313	0644	edit dl rm
lex_hash.h	143108	0644	edit dl rm
lex_ident.h	2122	0644	edit dl rm
lex_string.h	4077	0644	edit dl rm
lex_symbol.h	1323	0644	edit dl rm
lex_token.h	42641	0644	edit dl rm
lf.h	6462	0644	edit dl rm
lock.h	2220	0644	edit dl rm
log.h	46462	0644	edit dl rm
log_event.h	189467	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	38893	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	4734	0644	edit dl rm
myisammrg.h	4897	0644	edit dl rm
myisampack.h	14929	0644	edit dl rm
mysqld.h	41225	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	27750	0644	edit dl rm
my_bit.h	6196	0644	edit dl rm
my_bitmap.h	5502	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	4885	0644	edit dl rm
my_crypt.h	904	0644	edit dl rm
my_decimal.h	14504	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	18706	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	10119	0644	edit dl rm
my_rnd.h	1014	0644	edit dl rm
my_service_manager.h	2087	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
my_virtual_mem.h	1255	0644	edit dl rm
opt_histogram_json.h	4638	0644	edit dl rm
opt_range.h	65903	0644	edit dl rm
opt_subselect.h	14545	0644	edit dl rm
opt_trace.h	9505	0644	edit dl rm
opt_trace_context.h	3291	0644	edit dl rm
parse_file.h	4424	0644	edit dl rm
partition_element.h	5428	0644	edit dl rm
partition_info.h	19864	0644	edit dl rm
password.h	1621	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	28853	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	12537	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	16130	0644	edit dl rm
repl_failsafe.h	1585	0644	edit dl rm
rijndael.h	1711	0644	edit dl rm
rowid_filter.h	15474	0644	edit dl rm
rpl_constants.h	3357	0644	edit dl rm
rpl_filter.h	4774	0644	edit dl rm
rpl_gtid.h	29985	0644	edit dl rm
rpl_injector.h	9621	0644	edit dl rm
rpl_mi.h	16636	0644	edit dl rm
rpl_parallel.h	18228	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	36070	0644	edit dl rm
rpl_tblmap.h	3177	0644	edit dl rm
rpl_utility.h	9800	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	25764	0644	edit dl rm
semisync_master_ack_receiver.h	8709	0644	edit dl rm
semisync_slave.h	3736	0644	edit dl rm
service_versions.h	2285	0644	edit dl rm
session_tracker.h	14275	0644	edit dl rm
set_var.h	17331	0644	edit dl rm
slave.h	12392	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	2037	0644	edit dl rm
sp_head.h	64917	0644	edit dl rm
sp_pcontext.h	25427	0644	edit dl rm
sp_rcontext.h	14441	0644	edit dl rm
sql_acl.h	14167	0644	edit dl rm
sql_admin.h	2915	0644	edit dl rm
sql_alloc.h	1732	0644	edit dl rm
sql_alter.h	15395	0644	edit dl rm
sql_analyse.h	11052	0644	edit dl rm
sql_analyze_stmt.h	12683	0644	edit dl rm
sql_array.h	6858	0644	edit dl rm
sql_audit.h	14162	0644	edit dl rm
sql_base.h	26050	0644	edit dl rm
sql_basic_types.h	9523	0644	edit dl rm
sql_binlog.h	895	0644	edit dl rm
sql_bitmap.h	7842	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	271836	0644	edit dl rm
sql_cmd.h	5962	0644	edit dl rm
sql_command.h	4800	0644	edit dl rm
sql_connect.h	4087	0644	edit dl rm
sql_const.h	11630	0644	edit dl rm
sql_crypt.h	1437	0644	edit dl rm
sql_cte.h	16494	0644	edit dl rm
sql_cursor.h	4428	0644	edit dl rm
sql_db.h	2438	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	39843	0644	edit dl rm
sql_explain.h	30319	0644	edit dl rm
sql_expression_cache.h	4359	0644	edit dl rm
sql_get_diagnostics.h	7883	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	5173	0644	edit dl rm
sql_i_s.h	8487	0644	edit dl rm
sql_join_cache.h	48659	0644	edit dl rm
sql_lex.h	174931	0644	edit dl rm
sql_lifo_buffer.h	9685	0644	edit dl rm
sql_limit.h	3187	0644	edit dl rm
sql_list.h	22391	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	8970	0644	edit dl rm
sql_partition.h	12674	0644	edit dl rm
sql_partition_admin.h	5940	0644	edit dl rm
sql_plist.h	7711	0644	edit dl rm
sql_plugin.h	7577	0644	edit dl rm
sql_plugin_compat.h	2237	0644	edit dl rm
sql_prepare.h	11409	0644	edit dl rm
sql_priv.h	18528	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	89743	0644	edit dl rm
sql_sequence.h	5177	0644	edit dl rm
sql_servers.h	1777	0644	edit dl rm
sql_show.h	9819	0644	edit dl rm
sql_signal.h	3362	0644	edit dl rm
sql_sort.h	21964	0644	edit dl rm
sql_statistics.h	16504	0644	edit dl rm
sql_string.h	39009	0644	edit dl rm
sql_table.h	9812	0644	edit dl rm
sql_test.h	2665	0644	edit dl rm
sql_time.h	8505	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	297272	0644	edit dl rm
sql_type_fixedbin.h	65578	0644	edit dl rm
sql_type_fixedbin_storage.h	5467	0644	edit dl rm
sql_type_geom.h	19039	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	1068	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	3380	0644	edit dl rm
strfunc.h	2549	0644	edit dl rm
structs.h	29457	0644	edit dl rm
sys_vars_shared.h	2729	0644	edit dl rm
table.h	119009	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	7722	0644	edit dl rm
vers_string.h	2543	0644	edit dl rm
violite.h	9956	0644	edit dl rm
waiting_threads.h	4532	0644	edit dl rm
welcome_copyright_notice.h	1218	0644	edit dl rm
winservice.h	6019	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_allowlist_service.h	1035	0644	edit dl rm
wsrep_applier.h	2703	0644	edit dl rm
wsrep_binlog.h	3551	0644	edit dl rm
wsrep_client_service.h	2602	0644	edit dl rm
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wsrep_condition_variable.h	1484	0644	edit dl rm
wsrep_high_priority_service.h	4912	0644	edit dl rm
wsrep_mutex.h	1239	0644	edit dl rm
wsrep_mysqld.h	22006	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	5886	0644	edit dl rm
wsrep_server_service.h	3631	0644	edit dl rm
wsrep_server_state.h	2529	0644	edit dl rm
wsrep_sst.h	3951	0644	edit dl rm
wsrep_status.h	1816	0644	edit dl rm
wsrep_storage_service.h	1809	0644	edit dl rm
wsrep_thd.h	11487	0644	edit dl rm
wsrep_trans_observer.h	18174	0644	edit dl rm
wsrep_types.h	1110	0644	edit dl rm
wsrep_utils.h	10251	0644	edit dl rm
wsrep_var.h	4612	0644	edit dl rm
wsrep_xid.h	1509	0644	edit dl rm
xa.h	1845	0644	edit dl rm

Edit: /usr/include/mysql/server/private/lex_charset.h (24313B)

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 LEX_CHARSET_INCLUDED
#define LEX_CHARSET_INCLUDED

/*
  An extention for Charset_loader_mysys,
  with server error and warning support.
*/
class Charset_loader_server: public Charset_loader_mysys
{
public:
  using Charset_loader_mysys::Charset_loader_mysys;
  void raise_unknown_collation_error(const char *name) const;
  void raise_not_applicable_error(const char *cs, const char *cl) const;

/*
    Find an exact collation by name.
    Raise an error on a faulure.

@param cs              - the character set
    @param collation_name  - the collation name, e.g. "utf8_bin"
    @param my_flags        - my flags, e.g. MYF(WME)
    @returns               - a NULL pointer in case of failure, or
                             a CHARSET_INFO pointer on success.
  */

CHARSET_INFO *
    get_exact_collation_or_error(const char *name, myf my_flags= MYF(0))
  {
    CHARSET_INFO *ci= get_exact_collation(name, my_flags);
    if (!ci)
      raise_unknown_collation_error(name);
    return ci;
  }

/*
    Find an exact collation by a character set and a
    contextually typed collation name.
    Raise an error on in case of a faulure.

@param cs              - the character set
    @param context_cl_name - the context name, e.g. "uca1400_cs_ci"
    @param my_flags        - my flags, e.g. MYF(WME)
    @returns               - a NULL pointer in case of failure, or
                             a CHARSET_INFO pointer on success.
  */
  CHARSET_INFO *
    get_exact_collation_by_context_name_or_error(CHARSET_INFO *cs,
                                                 const char *name,
                                                 myf my_flags= MYF(0))
  {
    CHARSET_INFO *ci= get_exact_collation_by_context_name(cs, name, my_flags);
    if (!ci)
      raise_not_applicable_error(cs->cs_name.str, name);
    return ci;
  }

/*
    Find an abstract context collation by name.
    Raise an error on a faulure.
    The returned pointer needs to be resolved to a character set name.
    It should not be passed directly to the character set routines.

CHARSET_INFO *
    get_context_collation_or_error(const char *collation_name,
                                   myf my_flags= MYF(0))
  {
    CHARSET_INFO *ci= get_context_collation(collation_name, my_flags);
    if (!ci)
      raise_unknown_collation_error(collation_name);
    return ci;
  }

/*
    Find an exact binary collation in the given character set.
    Raise an error on a faulure.

@param cs              - the character set
    @param my_flags        - my flags, e.g. MYF(WME)
    @returns               - a NULL pointer in case of failure, or
                             a CHARSET_INFO pointer on success.
  */

CHARSET_INFO *
    get_bin_collation_or_error(CHARSET_INFO *cs,
                               myf my_flags= MYF(0))
  {
    const char *cs_name= cs->cs_name.str;
    if (!(cs= get_bin_collation(cs, my_flags)))
    {
      char tmp[65];
      strxnmov(tmp, sizeof(tmp)-1, cs_name, "_bin", NULL);
      raise_unknown_collation_error(tmp);
    }
    return cs;
  }

/*
    Find an exact default collation in the given character set.
    This routine does not fail.
    Any character set must have a default collation.

@param cs              - the character set
    @param my_flags        - my flags, e.g. MYF(WME)
    @returns               - a CHARSET_INFO pointer
  */

CHARSET_INFO *get_default_collation(CHARSET_INFO *cs,
                                      myf my_flags= MYF(0))
  {
    return Charset_loader_mysys::get_default_collation(cs, my_flags);
  }
};

/////////////////////////////////////////////////////////////////////

/*
  An exact character set, e.g:
    CHARACTER SET latin1
*/
class Lex_exact_charset
{
  CHARSET_INFO *m_ci;
public:
  explicit Lex_exact_charset(CHARSET_INFO *ci)
   :m_ci(ci)
  {
    DBUG_ASSERT(m_ci);
    DBUG_ASSERT(m_ci->state & MY_CS_PRIMARY);
  }
  CHARSET_INFO *charset_info() const { return m_ci; }
  bool raise_if_not_equal(const Lex_exact_charset &rhs) const;
  bool raise_if_not_applicable(const class Lex_exact_collation &cl) const;
};

/*
  An optional contextually typed character set:
    [ CHARACTER SET DEFAULT ]
*/
class Lex_opt_context_charset_st
{
  /*
    Currently we support only DEFAULT as a possible value.
    So "bool" is enough.
  */
  bool m_had_charset_default;
public:
  void init()
  {
    m_had_charset_default= false;
  }
  void merge_charset_default()
  {
    /*
      Ok to specify CHARACTER SET DEFAULT multiple times.
      No error raised here.
    */
    m_had_charset_default= true;
  }
  bool is_empty() const
  {
    return !m_had_charset_default;
  }
  bool is_contextually_typed_charset_default() const
  {
    return m_had_charset_default;
  }
};

/*
  A contextually typed collation, e.g.:
    COLLATE DEFAULT
    CHAR(10) BINARY
*/
class Lex_context_collation
{
  CHARSET_INFO *m_ci;
public:
  explicit Lex_context_collation(CHARSET_INFO *ci)
   :m_ci(ci)
  {
    DBUG_ASSERT(ci);
  }
  CHARSET_INFO *charset_info() const { return m_ci; }
  bool is_contextually_typed_collate_default() const
  {
    return m_ci == &my_collation_contextually_typed_default;
  }
  bool is_contextually_typed_binary_style() const
  {
    return m_ci == &my_collation_contextually_typed_binary;
  }
  bool raise_if_not_equal(const Lex_context_collation &cl) const;
  /*
    Skip the character set prefix, return the suffix.
      utf8mb4_uca1400_as_ci -> uca1400_as_ci
  */
  LEX_CSTRING collation_name_context_suffix() const
  {
    return m_ci->get_collation_name(MY_COLLATION_NAME_MODE_CONTEXT);
  }
  LEX_CSTRING collation_name_for_show() const;
};

/*
  An exact collation, e.g.
    COLLATE latin1_swedish_ci
*/
class Lex_exact_collation
{
  CHARSET_INFO *m_ci;
public:
  explicit Lex_exact_collation(CHARSET_INFO *ci)
   :m_ci(ci)
  {
    DBUG_ASSERT(ci);
  }
  CHARSET_INFO *charset_info() const { return m_ci; }
  // EXACT + EXACT
  bool raise_if_not_equal(const Lex_exact_collation &cl) const;
  // EXACT + CONTEXT
  // CONTEXT + EXACT
  bool raise_if_conflicts_with_context_collation(const Lex_context_collation &,
                                                 bool reverse_order) const;
};

/*
  Parse time COLLATE clause:
    COLLATE colation_name
  The collation can be either exact or contextual:
    COLLATE latin1_bin
    COLLATE DEFAULT
*/
class Lex_extended_collation_st
{
public:
  enum Type
  {
    TYPE_EXACT,
    TYPE_CONTEXTUALLY_TYPED
  };
protected:
  CHARSET_INFO *m_ci;
  Type m_type;
public:
  void init(CHARSET_INFO *ci, Type type)
  {
    m_ci= ci;
    m_type= type;
  }
  CHARSET_INFO *charset_info() const { return m_ci; }
  Type type() const { return m_type; }
  LEX_CSTRING collation_name_for_show() const
  {
    switch (m_type) {
    case TYPE_CONTEXTUALLY_TYPED:
      return Lex_context_collation(m_ci).collation_name_for_show();
    case TYPE_EXACT:
      return m_ci->coll_name;
    }
    DBUG_ASSERT(0);
    return m_ci->coll_name;
  }
  static Lex_extended_collation_st collate_default()
  {
    Lex_extended_collation_st res;
    res.set_collate_default();
    return res;
  }
  void set_collate_default()
  {
    m_ci= &my_collation_contextually_typed_default;
    m_type= TYPE_CONTEXTUALLY_TYPED;
  }
  bool set_by_name(const char *name, myf my_flags); // e.g. MY_UTF8_IS_UTF8MB3
  bool raise_if_conflicts_with_context_collation(const Lex_context_collation &)
                                                 const;
  bool merge_exact_charset(const Lex_exact_charset &rhs);
  bool merge_exact_collation(const Lex_exact_collation &rhs);
  bool merge(const Lex_extended_collation_st &rhs);
};

class Lex_extended_collation: public Lex_extended_collation_st
{
public:
  Lex_extended_collation(CHARSET_INFO *ci, Type type)
  {
    init(ci, type);
  }
  Lex_extended_collation(const Lex_exact_collation &rhs)
  {
    init(rhs.charset_info(), TYPE_EXACT);
  }
  Lex_extended_collation(const Lex_context_collation &rhs)
  {
    init(rhs.charset_info(), TYPE_CONTEXTUALLY_TYPED);
  }
};

/*
  CHARACTER SET cs_exact [COLLATE cl_exact_or_context]
*/
class Lex_exact_charset_opt_extended_collate
{
  CHARSET_INFO *m_ci;
  bool m_with_collate;
public:
  Lex_exact_charset_opt_extended_collate(CHARSET_INFO *ci, bool with_collate)
   :m_ci(ci), m_with_collate(with_collate)
  {
    DBUG_ASSERT(m_ci);
    DBUG_ASSERT((m_ci->state & MY_CS_PRIMARY) || m_with_collate);
  }
  Lex_exact_charset_opt_extended_collate(const Lex_exact_charset &cs)
   :m_ci(cs.charset_info()), m_with_collate(false)
  {
    DBUG_ASSERT(m_ci);
    DBUG_ASSERT(m_ci->state & MY_CS_PRIMARY);
  }
  Lex_exact_charset_opt_extended_collate(const Lex_exact_collation &cl)
   :m_ci(cl.charset_info()), m_with_collate(true)
  {
    DBUG_ASSERT(m_ci);
  }
  bool with_collate() const { return m_with_collate; }
  CHARSET_INFO *find_bin_collation() const;
  CHARSET_INFO *find_default_collation() const;
  bool raise_if_charsets_differ(const Lex_exact_charset &cs) const;
  bool raise_if_not_applicable(const Lex_exact_collation &cl) const;
  /*
    Add another COLLATE clause (exact or context).
    So the full syntax looks like:
      CHARACTER SET cs [COLLATE cl] ... COLLATE cl2
  */
  bool merge_collation(const Lex_extended_collation_st &cl)
  {
    switch (cl.type()) {
    case Lex_extended_collation_st::TYPE_EXACT:
      return merge_exact_collation(Lex_exact_collation(cl.charset_info()));
    case Lex_extended_collation_st::TYPE_CONTEXTUALLY_TYPED:
      return merge_context_collation(Lex_context_collation(cl.charset_info()));
    }
    DBUG_ASSERT(0);
    return false;
  }
  bool merge_collation_override(const Lex_extended_collation_st &cl)
  {
    switch (cl.type()) {
    case Lex_extended_collation_st::TYPE_EXACT:
      return merge_exact_collation_override(
        Lex_exact_collation(cl.charset_info()));
    case Lex_extended_collation_st::TYPE_CONTEXTUALLY_TYPED:
      return merge_context_collation_override(
        Lex_context_collation(cl.charset_info()));
    }
    DBUG_ASSERT(0);
    return false;
  }
  /*
    Add a context collation:
      CHARACTER SET cs [COLLATE cl] ... COLLATE DEFAULT
  */
  bool merge_context_collation(const Lex_context_collation &cl);
  bool merge_context_collation_override(const Lex_context_collation &cl);
  /*
    Add an exact collation:
      CHARACTER SET cs [COLLATE cl] ... COLLATE latin1_bin
  */
  bool merge_exact_collation(const Lex_exact_collation &cl);
  bool merge_exact_collation_override(const Lex_exact_collation &cl);
  Lex_exact_collation collation() const
  {
    return Lex_exact_collation(m_ci);
  }
  Lex_exact_charset charset() const
  {
    if ((m_ci->state & MY_CS_PRIMARY))
      return Lex_exact_charset(m_ci);
    return Lex_exact_charset(find_default_collation());
  }
};

/*
  Parse time character set and collation for:
    [CHARACTER SET cs_exact] [COLLATE cl_exact_or_context]

Can be:

1. Empty (not specified on the column level):
     CREATE TABLE t1 (a CHAR(10)) CHARACTER SET latin2;        -- (1a)
     CREATE TABLE t1 (a CHAR(10));                             -- (1b)

2. Precisely typed:
     CREATE TABLE t1 (a CHAR(10) COLLATE latin1_bin);          -- (2a)
     CREATE TABLE t1 (
       a CHAR(10) CHARACTER SET latin1 COLLATE latin1_bin);    -- (2b)

3. Contextually typed:
     CREATE TABLE t2 (a CHAR(10) BINARY) CHARACTER SET latin2; -- (3a)
     CREATE TABLE t2 (a CHAR(10) BINARY);                      -- (3b)
     CREATE TABLE t2 (a CHAR(10) COLLATE DEFAULT)
       CHARACER SET latin2 COLLATE latin2_bin;                 -- (3c)

In case of an empty or a contextually typed collation,
  it is a subject to later resolution, when the context
  character set becomes known in the end of the CREATE statement:
  - either after the explicit table level CHARACTER SET, like in (1a,3a,3c)
  - or by the inhereted database level CHARACTER SET, like in (1b,3b)

Resolution happens in Type_handler::Column_definition_prepare_stage1().
*/
struct Lex_exact_charset_extended_collation_attrs_st
{
public:
  enum Type
  {
    TYPE_EMPTY= 0,
    TYPE_CHARACTER_SET= 1,
    TYPE_COLLATE_EXACT= 2,
    TYPE_CHARACTER_SET_COLLATE_EXACT= 3,
    TYPE_COLLATE_CONTEXTUALLY_TYPED= 4
  };

// Number of bits required to store enum Type values

#define LEX_CHARSET_COLLATION_TYPE_BITS 3
#define LEX_CHARSET_COLLATION_TYPE_MASK ((1<<LEX_CHARSET_COLLATION_TYPE_BITS)-1)

static_assert(LEX_CHARSET_COLLATION_TYPE_MASK >=
                TYPE_COLLATE_CONTEXTUALLY_TYPED,
                 "Lex_exact_charset_extended_collation_attrs_st::Type bits");

protected:
  CHARSET_INFO *m_ci;
  Type m_type;
protected:
  static Type type_from_lex_collation_type(Lex_extended_collation_st::Type type)
  {
    switch (type) {
    case Lex_extended_collation_st::TYPE_EXACT:
      return TYPE_COLLATE_EXACT;
    case Lex_extended_collation_st::TYPE_CONTEXTUALLY_TYPED:
      return TYPE_COLLATE_CONTEXTUALLY_TYPED;
    }
    DBUG_ASSERT(0);
    return TYPE_COLLATE_EXACT;
  }
public:
  void init()
  {
    m_ci= NULL;
    m_type= TYPE_EMPTY;
  }
  void init(CHARSET_INFO *cs, Type type)
  {
    DBUG_ASSERT(cs || type == TYPE_EMPTY);
    m_ci= cs;
    m_type= type;
  }
  void init(const Lex_exact_charset &cs)
  {
    m_ci= cs.charset_info();
    m_type= TYPE_CHARACTER_SET;
  }
  void init(const Lex_exact_collation &cs)
  {
    m_ci= cs.charset_info();
    m_type= TYPE_COLLATE_EXACT;
  }
  void init(const Lex_exact_charset_opt_extended_collate &cscl)
  {
    if (cscl.with_collate())
      init(cscl.collation().charset_info(), TYPE_CHARACTER_SET_COLLATE_EXACT);
    else
      init(cscl.charset());
  }
  bool is_empty() const
  {
    return m_type == TYPE_EMPTY;
  }
  void set_charset(const Lex_exact_charset &cs)
  {
    m_ci= cs.charset_info();
    m_type= TYPE_CHARACTER_SET;
  }
  bool set_charset_collate_default(const Lex_exact_charset &cs)
  {
    CHARSET_INFO *ci;
    if (!(ci= Lex_exact_charset_opt_extended_collate(cs).
                find_default_collation()))
      return true;
    m_ci= ci;
    m_type= TYPE_CHARACTER_SET_COLLATE_EXACT;
    return false;
  }
  bool set_charset_collate_binary(const Lex_exact_charset &cs)
  {
    CHARSET_INFO *ci;
    if (!(ci= Lex_exact_charset_opt_extended_collate(cs).find_bin_collation()))
      return true;
    m_ci= ci;
    m_type= TYPE_CHARACTER_SET_COLLATE_EXACT;
    return false;
  }
  void set_collate_default()
  {
    m_ci= &my_collation_contextually_typed_default;
    m_type= TYPE_COLLATE_CONTEXTUALLY_TYPED;
  }
  void set_contextually_typed_binary_style()
  {
    m_ci= &my_collation_contextually_typed_binary;
    m_type= TYPE_COLLATE_CONTEXTUALLY_TYPED;
  }
  bool is_contextually_typed_collate_default() const
  {
    return Lex_context_collation(m_ci).is_contextually_typed_collate_default();
  }
  CHARSET_INFO *charset_info() const
  {
    return m_ci;
  }
  Type type() const
  {
    return m_type;
  }
  bool is_contextually_typed_collation() const
  {
    return m_type == TYPE_COLLATE_CONTEXTUALLY_TYPED;
  }
  CHARSET_INFO *resolved_to_character_set(CHARSET_INFO *cs) const;
  /*
    Merge the column CHARACTER SET clause to:
    - an exact collation name
    - a contextually typed collation
    "this" corresponds to `CHARACTER SET xxx [BINARY]`
    "cl" corresponds to the COLLATE clause
  */
  bool merge_column_charset_clause_and_collate_clause(
                    const Lex_exact_charset_extended_collation_attrs_st &cl)
  {
    switch (cl.type()) {
    case TYPE_EMPTY:
      return false;
    case TYPE_COLLATE_EXACT:
      return merge_exact_collation(Lex_exact_collation(cl.charset_info()));
    case TYPE_COLLATE_CONTEXTUALLY_TYPED:
      return merge_context_collation(Lex_context_collation(cl.charset_info()));
    case TYPE_CHARACTER_SET:
    case TYPE_CHARACTER_SET_COLLATE_EXACT:
      break;
    }
    DBUG_ASSERT(0);
    return false;
  }
  /*
    This method is used in the "attribute_list" rule to merge two independent
    COLLATE clauses (not belonging to a CHARACTER SET clause).
    "BINARY" and "COLLATE DEFAULT" are not possible
    in an independent COLLATE clause in a column attribute.
  */
  bool merge_column_collate_clause_and_collate_clause(
                    const Lex_exact_charset_extended_collation_attrs_st &cl)
  {
    DBUG_ASSERT(m_type != TYPE_CHARACTER_SET);
    switch (cl.type()) {
    case TYPE_EMPTY:
      return false;
    case TYPE_COLLATE_EXACT:
      return merge_exact_collation(Lex_exact_collation(cl.charset_info()));
    case TYPE_COLLATE_CONTEXTUALLY_TYPED:
      return merge_context_collation(Lex_context_collation(cl.charset_info()));
    case TYPE_CHARACTER_SET:
    case TYPE_CHARACTER_SET_COLLATE_EXACT:
      break;
    }
    DBUG_ASSERT(0);
    return false;
  }
  bool merge_exact_charset(const Lex_exact_charset &cs);
  bool merge_exact_collation(const Lex_exact_collation &cl);
  bool merge_context_collation(const Lex_context_collation &cl);
  bool merge_collation(const Lex_extended_collation_st &cl);
};

class Charset_collation_context
{
  /*
    Although the goal of m_charset_default is to store the meaning
    of CHARACTER SET DEFAULT, it does not necessarily point to a
    default collation of CHARACTER SET DEFAULT. It can point to its any
    arbitrary collation.
    For performance purposes we don't need to find the default
    collation at the instantiation time of "this", because:
    - m_charset_default may not be even needed during the resolution
    - when it's needed, in many cases it's passed to my_charset_same(),
      which does not need the default collation again.

Note, m_charset_default and m_collate_default are not necessarily equal.

- The default value for CHARACTER SET is taken from the upper level:
        CREATE DATABASE db1 CHARACTER SET DEFAULT; <-- @@character_set_server
        ALTER DATABASE db1 CHARACTER SET DEFAULT;  <-- @@character_set_server

- The default value for COLLATE is taken from the upper level for CREATE:
        CREATE DATABASE db1 COLLATE DEFAULT; <-- @@collation_server
        CREATE TABLE db1.t1 COLLATE DEFAULT; <-- character set of "db1"

- The default value for COLLATE is taken from the same level for ALTER:
        ALTER DATABASE db1 COLLATE DEFAULT; <-- the default collation of the
                                                current db1 character set
        ALTER TABLE db1.t1 COLLATE DEFAULT; <-- the default collation of the
                                                current db1.t1 character set
  */

// comes from the upper level
  Lex_exact_charset_opt_extended_collate m_charset_default;

// comes from the upper or the current level
  Lex_exact_collation m_collate_default;
public:
  Charset_collation_context(CHARSET_INFO *charset_default,
                            CHARSET_INFO *collate_default)
   :m_charset_default(charset_default,
                      !(charset_default->state & MY_CS_PRIMARY)),
    m_collate_default(collate_default)
  { }
  const Lex_exact_charset_opt_extended_collate charset_default() const
  {
    return m_charset_default;
  }
  const Lex_exact_collation collate_default() const
  {
    return m_collate_default;
  }
};

/*
  A universal container. It can store at the same time:
  - CHARACTER SET DEFAULT
  - CHARACTER SET cs_exact
  - COLLATE {cl_exact|cl_context}
  All three parts can co-exist.
  All three parts are optional.
  Parts can come in any arbitrary order, e.g:

CHARACTER SET DEFAULT [CHARACTER SET latin1] COLLATE latin1_bin
    CHARACTER SET latin1 CHARACTER SET DEFAULT COLLATE latin1_bin
    COLLATE latin1_bin [CHARACTER SET latin1] CHARACTER SET DEFAULT
    COLLATE latin1_bin CHARACTER SET DEFAULT [CHARACTER SET latin1]
*/
class Lex_extended_charset_extended_collation_attrs_st:
                        public Lex_opt_context_charset_st,
                        public Lex_exact_charset_extended_collation_attrs_st
{
  enum charset_type_t
  {
    CHARSET_TYPE_EMPTY,
    CHARSET_TYPE_CONTEXT,
    CHARSET_TYPE_EXACT
  };
  /*
    Which part came first:
    - CHARACTER SET DEFAULT or
    - CHARACTER SET cs_exact
    e.g. to produce error messages preserving the user typed
    order of CHARACTER SET clauses in case of conflicts.
  */
  charset_type_t m_charset_order;
public:
  void init()
  {
    Lex_opt_context_charset_st::init();
    Lex_exact_charset_extended_collation_attrs_st::init();
    m_charset_order= CHARSET_TYPE_EMPTY;
  }
  void init(const Lex_exact_charset_opt_extended_collate &c)
  {
    Lex_opt_context_charset_st::init();
    Lex_exact_charset_extended_collation_attrs_st::init(c);
    m_charset_order= CHARSET_TYPE_EXACT;
  }
  bool is_empty() const
  {
    return Lex_opt_context_charset_st::is_empty() &&
           Lex_exact_charset_extended_collation_attrs_st::is_empty();
  }
  bool raise_if_charset_conflicts_with_default(
                        const Lex_exact_charset_opt_extended_collate &def) const;
  CHARSET_INFO *resolved_to_context(const Charset_collation_context &ctx) const;
  bool merge_charset_default();
  bool merge_exact_charset(const Lex_exact_charset &cs);
};

class Lex_exact_charset_extended_collation_attrs:
                        public Lex_exact_charset_extended_collation_attrs_st
{
public:
  Lex_exact_charset_extended_collation_attrs()
  {
    init();
  }
  Lex_exact_charset_extended_collation_attrs(CHARSET_INFO *collation, Type type)
  {
    init(collation, type);
  }
  explicit
  Lex_exact_charset_extended_collation_attrs(const Lex_exact_charset &cs)
  {
    init(cs.charset_info(), TYPE_CHARACTER_SET);
  }
  explicit
  Lex_exact_charset_extended_collation_attrs(const Lex_exact_collation &cl)
  {
    init(cl.charset_info(), TYPE_COLLATE_EXACT);
  }
  explicit
  Lex_exact_charset_extended_collation_attrs(const Lex_context_collation &cl)
  {
    init(cl.charset_info(), TYPE_COLLATE_CONTEXTUALLY_TYPED);
  }
  explicit
  Lex_exact_charset_extended_collation_attrs(
                    const Lex_exact_charset_opt_extended_collate &cscl)
  {
    init(cscl);
  }
  explicit
  Lex_exact_charset_extended_collation_attrs(const Lex_extended_collation_st &cl)
  {
    init(cl.charset_info(), type_from_lex_collation_type(cl.type()));
  }
  static Lex_exact_charset_extended_collation_attrs national(bool bin_mod)
  {
    return bin_mod ?
      Lex_exact_charset_extended_collation_attrs(&my_charset_utf8mb3_bin,
                                                 TYPE_COLLATE_EXACT) :
      Lex_exact_charset_extended_collation_attrs(&my_charset_utf8mb3_general_ci,
                                                 TYPE_CHARACTER_SET);
  }
};

class Lex_extended_charset_extended_collation_attrs:
  public Lex_extended_charset_extended_collation_attrs_st
{
public:
  Lex_extended_charset_extended_collation_attrs()
  {
    init();
  }
  explicit Lex_extended_charset_extended_collation_attrs(
    const Lex_exact_charset_opt_extended_collate &c)
  {
    init(c);
  }
};

using Lex_column_charset_collation_attrs_st =
        Lex_exact_charset_extended_collation_attrs_st;

using Lex_column_charset_collation_attrs =
        Lex_exact_charset_extended_collation_attrs;

using Lex_table_charset_collation_attrs_st =
        Lex_extended_charset_extended_collation_attrs_st;

using Lex_table_charset_collation_attrs =
        Lex_extended_charset_extended_collation_attrs;

#endif // LEX_CHARSET_INCLUDED

cmd: