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?? ..
?? aligned.h(1.11 KB)
?? aria_backup.h(1.51 KB)
?? assume_aligned.h(2.29 KB)
?? atomic
?? authors.h(9.9 KB)
?? backup.h(1.66 KB)
?? bounded_queue.h(5.95 KB)
?? char_buffer.h(3.09 KB)
?? charset_collations.h(6.41 KB)
?? client_settings.h(1.87 KB)
?? compat56.h(2.23 KB)
?? config.h(14.21 KB)
?? contributors.h(4.76 KB)
?? create_options.h(4.09 KB)
?? create_tmp_table.h(2.74 KB)
?? cset_narrowing.h(3.88 KB)
?? custom_conf.h(1.06 KB)
?? data
?? datadict.h(1.66 KB)
?? ddl_log.h(12.51 KB)
?? debug.h(1.26 KB)
?? debug_sync.h(2 KB)
?? deprecation.h(2.74 KB)
?? derived_handler.h(2.32 KB)
?? derror.h(980 B)
?? des_key_file.h(1.21 KB)
?? discover.h(1.53 KB)
?? dur_prop.h(1.06 KB)
?? embedded_priv.h(1.69 KB)
?? event_data_objects.h(4.09 KB)
?? event_db_repository.h(3.56 KB)
?? event_parse_data.h(2.83 KB)
?? event_queue.h(3.36 KB)
?? event_scheduler.h(3.21 KB)
?? events.h(4.6 KB)
?? field.h(217.81 KB)
?? field_comp.h(1.15 KB)
?? filesort.h(7.13 KB)
?? filesort_utils.h(10.53 KB)
?? ft_global.h(3.04 KB)
?? gcalc_slicescan.h(16.87 KB)
?? gcalc_tools.h(11.62 KB)
?? grant.h(2.69 KB)
?? group_by_handler.h(3.45 KB)
?? gstream.h(2.38 KB)
?? gtid_index.h(19.54 KB)
?? ha_handler_stats.h(2.28 KB)
?? ha_partition.h(63.36 KB)
?? ha_sequence.h(6.1 KB)
?? handle_connections_win.h(884 B)
?? handler.h(206.19 KB)
?? hash.h(4.35 KB)
?? hash_filo.h(5.55 KB)
?? heap.h(9.26 KB)
?? hostname.h(5.29 KB)
?? ilist.h(6.98 KB)
?? init.h(852 B)
?? innodb_priv.h(1.29 KB)
?? item.h(276.43 KB)
?? item_cmpfunc.h(132.01 KB)
?? item_create.h(11.24 KB)
?? item_func.h(134.64 KB)
?? item_geofunc.h(38.16 KB)
?? item_jsonfunc.h(27.86 KB)
?? item_row.h(5.1 KB)
?? item_strfunc.h(75.33 KB)
?? item_subselect.h(57.63 KB)
?? item_sum.h(70.69 KB)
?? item_timefunc.h(63.85 KB)
?? item_vers.h(4.26 KB)
?? item_windowfunc.h(33.56 KB)
?? item_xmlfunc.h(4.52 KB)
?? json_schema.h(25.1 KB)
?? json_schema_helper.h(1.13 KB)
?? json_table.h(9.44 KB)
?? key.h(2.08 KB)
?? keycaches.h(1.94 KB)
?? lex.h(29.54 KB)
?? lex_charset.h(25.92 KB)
?? lex_hash.h(141.94 KB)
?? lex_ident.h(5.15 KB)
?? lex_string.h(4.77 KB)
?? lex_symbol.h(1.29 KB)
?? lex_token.h(42.01 KB)
?? lf.h(6.31 KB)
?? lock.h(2.2 KB)
?? log.h(51.28 KB)
?? log_cache.h(7.57 KB)
?? log_event.h(172.56 KB)
?? log_event_data_type.h(1.85 KB)
?? log_slow.h(2.38 KB)
?? maria.h(5.73 KB)
?? mariadb.h(1.25 KB)
?? mdl.h(37.65 KB)
?? mem_root_array.h(6.94 KB)
?? message.h(1.17 KB)
?? multi_range_read.h(22.65 KB)
?? my_apc.h(4.64 KB)
?? my_atomic.h(7.11 KB)
?? my_atomic_wrapper.h(2.98 KB)
?? my_base.h(27.28 KB)
?? my_bit.h(6.05 KB)
?? my_bitmap.h(5.37 KB)
?? my_check_opt.h(2.56 KB)
?? my_compare.h(10.87 KB)
?? my_counter.h(1.68 KB)
?? my_cpu.h(4.74 KB)
?? my_crypt.h(904 B)
?? my_decimal.h(14.15 KB)
?? my_default.h(1.84 KB)
?? my_handler_errors.h(4.77 KB)
?? my_json_writer.h(18.14 KB)
?? my_libwrap.h(1.16 KB)
?? my_md5.h(1.45 KB)
?? my_minidump.h(848 B)
?? my_nosys.h(1.4 KB)
?? my_rdtsc.h(9.88 KB)
?? my_rnd.h(1014 B)
?? my_service_manager.h(2.07 KB)
?? my_stack_alloc.h(6.34 KB)
?? my_stacktrace.h(3.14 KB)
?? my_time.h(10.17 KB)
?? my_tracker.h(1.37 KB)
?? my_tree.h(3.9 KB)
?? my_uctype.h(67.9 KB)
?? my_user.h(1.1 KB)
?? my_virtual_mem.h(1.1 KB)
?? myisam.h(17.18 KB)
?? myisamchk.h(4.62 KB)
?? myisammrg.h(4.78 KB)
?? myisampack.h(14.58 KB)
?? mysqld.h(41.11 KB)
?? mysqld_default_groups.h(204 B)
?? mysqld_suffix.h(1.17 KB)
?? mysys_err.h(2.99 KB)
?? opt_histogram_json.h(4.71 KB)
?? opt_range.h(64.78 KB)
?? opt_rewrite_date_cmp.h(3.84 KB)
?? opt_subselect.h(14.78 KB)
?? opt_trace.h(8.29 KB)
?? opt_trace_context.h(3.21 KB)
?? optimizer_costs.h(5.89 KB)
?? optimizer_defaults.h(7.37 KB)
?? parse_file.h(4.28 KB)
?? partition_element.h(5.3 KB)
?? partition_info.h(19.4 KB)
?? password.h(1.14 KB)
?? pfs_file_provider.h(3.08 KB)
?? pfs_idle_provider.h(1.35 KB)
?? pfs_memory_provider.h(1.59 KB)
?? pfs_metadata_provider.h(1.85 KB)
?? pfs_socket_provider.h(2.21 KB)
?? pfs_stage_provider.h(1.52 KB)
?? pfs_statement_provider.h(4.25 KB)
?? pfs_table_provider.h(2.56 KB)
?? pfs_thread_provider.h(5.43 KB)
?? pfs_transaction_provider.h(2.78 KB)
?? privilege.h(28.44 KB)
?? probes_mysql.h(973 B)
?? probes_mysql_dtrace.h(32.23 KB)
?? probes_mysql_nodtrace.h(5.94 KB)
?? procedure.h(6.63 KB)
?? protocol.h(12.27 KB)
?? providers
?? proxy_protocol.h(548 B)
?? queues.h(3.4 KB)
?? records.h(3.07 KB)
?? repl_failsafe.h(1.55 KB)
?? replication.h(15.2 KB)
?? rijndael.h(1.67 KB)
?? rowid_filter.h(16.03 KB)
?? rpl_constants.h(3.28 KB)
?? rpl_filter.h(4.66 KB)
?? rpl_gtid.h(29.95 KB)
?? rpl_injector.h(9.4 KB)
?? rpl_mi.h(16.29 KB)
?? rpl_parallel.h(17.8 KB)
?? rpl_record.h(1.49 KB)
?? rpl_reporting.h(3.63 KB)
?? rpl_rli.h(35.02 KB)
?? rpl_tblmap.h(3.1 KB)
?? rpl_utility.h(10.93 KB)
?? scheduler.h(3.12 KB)
?? scope.h(4.29 KB)
?? select_handler.h(3.34 KB)
?? semisync.h(2.23 KB)
?? semisync_master.h(25.16 KB)
?? semisync_master_ack_receiver.h(8.5 KB)
?? semisync_slave.h(3.65 KB)
?? service_versions.h(2.23 KB)
?? session_tracker.h(13.75 KB)
?? set_var.h(16.39 KB)
?? simple_tokenizer.h(1.97 KB)
?? slave.h(11.99 KB)
?? socketpair.h(842 B)
?? source_revision.h(67 B)
?? sp.h(23.11 KB)
?? sp_cache.h(1.99 KB)
?? sp_head.h(38.61 KB)
?? sp_instr.h(40.41 KB)
?? sp_pcontext.h(24.71 KB)
?? sp_rcontext.h(14.08 KB)
?? span.h(3.84 KB)
?? spatial.h(21.78 KB)
?? sql_acl.h(13.75 KB)
?? sql_admin.h(2.85 KB)
?? sql_alloc.h(1.69 KB)
?? sql_alter.h(15.08 KB)
?? sql_analyse.h(10.86 KB)
?? sql_analyze_stmt.h(12.4 KB)
?? sql_array.h(6.97 KB)
?? sql_audit.h(13.83 KB)
?? sql_base.h(25.87 KB)
?? sql_basic_types.h(9.3 KB)
?? sql_binlog.h(895 B)
?? sql_bitmap.h(7.88 KB)
?? sql_bootstrap.h(1.77 KB)
?? sql_cache.h(21.34 KB)
?? sql_callback.h(1.51 KB)
?? sql_class.h(270.56 KB)
?? sql_cmd.h(15.11 KB)
?? sql_connect.h(3.96 KB)
?? sql_const.h(10.07 KB)
?? sql_crypt.h(1.4 KB)
?? sql_cte.h(16.15 KB)
?? sql_cursor.h(4.14 KB)
?? sql_db.h(2.28 KB)
?? sql_debug.h(5.51 KB)
?? sql_delete.h(3.52 KB)
?? sql_derived.h(1.26 KB)
?? sql_digest.h(3.73 KB)
?? sql_digest_stream.h(1.53 KB)
?? sql_do.h(954 B)
?? sql_error.h(39.39 KB)
?? sql_explain.h(30.39 KB)
?? sql_expression_cache.h(4.26 KB)
?? sql_get_diagnostics.h(7.7 KB)
?? sql_handler.h(2.84 KB)
?? sql_help.h(995 B)
?? sql_hset.h(3.32 KB)
?? sql_i_s.h(8.29 KB)
?? sql_insert.h(5.05 KB)
?? sql_join_cache.h(47.52 KB)
?? sql_lex.h(174.22 KB)
?? sql_lifo_buffer.h(9.45 KB)
?? sql_limit.h(3.11 KB)
?? sql_list.h(21.87 KB)
?? sql_load.h(1.25 KB)
?? sql_locale.h(3.16 KB)
?? sql_manager.h(960 B)
?? sql_mode.h(6.58 KB)
?? sql_parse.h(8.31 KB)
?? sql_partition.h(12.38 KB)
?? sql_partition_admin.h(5.8 KB)
?? sql_plist.h(7.53 KB)
?? sql_plugin.h(7.4 KB)
?? sql_plugin_compat.h(2.18 KB)
?? sql_prepare.h(11.4 KB)
?? sql_priv.h(15.08 KB)
?? sql_profile.h(7.63 KB)
?? sql_reload.h(1.01 KB)
?? sql_rename.h(982 B)
?? sql_repl.h(2.99 KB)
?? sql_schema.h(3.23 KB)
?? sql_select.h(91 KB)
?? sql_sequence.h(5.06 KB)
?? sql_servers.h(1.74 KB)
?? sql_show.h(9.73 KB)
?? sql_signal.h(3.28 KB)
?? sql_sort.h(21.96 KB)
?? sql_statistics.h(16.41 KB)
?? sql_string.h(37.92 KB)
?? sql_table.h(9.52 KB)
?? sql_test.h(1.55 KB)
?? sql_time.h(7.24 KB)
?? sql_trigger.h(11.88 KB)
?? sql_truncate.h(2.03 KB)
?? sql_tvc.h(2.36 KB)
?? sql_type.h(291.25 KB)
?? sql_type_fixedbin.h(63.94 KB)
?? sql_type_fixedbin_storage.h(5.34 KB)
?? sql_type_geom.h(18.59 KB)
?? sql_type_int.h(9.77 KB)
?? sql_type_json.h(6.01 KB)
?? sql_type_real.h(1.23 KB)
?? sql_type_string.h(1.59 KB)
?? sql_type_timeofday.h(2.26 KB)
?? sql_udf.h(4.74 KB)
?? sql_union.h(1.04 KB)
?? sql_update.h(3.55 KB)
?? sql_used.h(1.02 KB)
?? sql_view.h(2.41 KB)
?? sql_window.h(6.65 KB)
?? ssl_compat.h(3.3 KB)
?? strfunc.h(2.22 KB)
?? structs.h(30.55 KB)
?? sys_vars_shared.h(2.67 KB)
?? t_ctype.h(5.51 KB)
?? table.h(118.11 KB)
?? table_cache.h(4.13 KB)
?? thr_lock.h(7.06 KB)
?? thr_malloc.h(1.17 KB)
?? thr_timer.h(1.53 KB)
?? thread_cache.h(5.77 KB)
?? threadpool.h(4.7 KB)
?? threadpool_generic.h(3.88 KB)
?? threadpool_winsockets.h(2.24 KB)
?? transaction.h(1.43 KB)
?? tzfile.h(4.9 KB)
?? tztime.h(3.65 KB)
?? uniques.h(4.13 KB)
?? unireg.h(7.76 KB)
?? vers_string.h(2.39 KB)
?? violite.h(9.85 KB)
?? waiting_threads.h(4.43 KB)
?? welcome_copyright_notice.h(1.42 KB)
?? winservice.h(5.88 KB)
?? wqueue.h(1.53 KB)
?? wsrep.h(3.23 KB)
?? wsrep_allowlist_service.h(1.01 KB)
?? wsrep_applier.h(2.64 KB)
?? wsrep_binlog.h(3.36 KB)
?? wsrep_client_service.h(2.5 KB)
?? wsrep_client_state.h(1.53 KB)
?? wsrep_condition_variable.h(1.45 KB)
?? wsrep_event_service.h(1.32 KB)
?? wsrep_high_priority_service.h(4.8 KB)
?? wsrep_mutex.h(1.21 KB)
?? wsrep_mysqld.h(20.93 KB)
?? wsrep_mysqld_c.h(1.2 KB)
?? wsrep_on.h(1.68 KB)
?? wsrep_plugin.h(1.35 KB)
?? wsrep_priv.h(1.6 KB)
?? wsrep_schema.h(5.48 KB)
?? wsrep_server_service.h(3.55 KB)
?? wsrep_server_state.h(3.06 KB)
?? wsrep_sst.h(3.86 KB)
?? wsrep_status.h(1.93 KB)
?? wsrep_storage_service.h(1.77 KB)
?? wsrep_thd.h(10.9 KB)
?? wsrep_trans_observer.h(17.75 KB)
?? wsrep_types.h(1.08 KB)
?? wsrep_utils.h(9.58 KB)
?? wsrep_var.h(4.25 KB)
?? wsrep_xid.h(1.51 KB)
?? xa.h(1.86 KB)

Editing: sql_show.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_SHOW_H
#define SQL_SHOW_H

#include "sql_list.h"                           /* List */
#include "handler.h"                            /* enum_schema_tables */
#include "table.h"                              /* enum_schema_table_state */
#include "my_apc.h"

/* Forward declarations */
class JOIN;
class String;
class THD;
class sp_name;
struct TABLE_LIST;
typedef class st_select_lex SELECT_LEX;
struct LEX;
typedef struct st_mysql_show_var SHOW_VAR;
typedef struct st_schema_table ST_SCHEMA_TABLE;
struct TABLE;
typedef struct system_status_var STATUS_VAR;

/* Used by handlers to store things in schema tables */
#define IS_FILES_FILE_ID              0
#define IS_FILES_FILE_NAME            1
#define IS_FILES_FILE_TYPE            2
#define IS_FILES_TABLESPACE_NAME      3
#define IS_FILES_TABLE_CATALOG        4
#define IS_FILES_TABLE_SCHEMA         5
#define IS_FILES_TABLE_NAME           6
#define IS_FILES_LOGFILE_GROUP_NAME   7
#define IS_FILES_LOGFILE_GROUP_NUMBER 8
#define IS_FILES_ENGINE               9
#define IS_FILES_FULLTEXT_KEYS       10
#define IS_FILES_DELETED_ROWS        11
#define IS_FILES_UPDATE_COUNT        12
#define IS_FILES_FREE_EXTENTS        13
#define IS_FILES_TOTAL_EXTENTS       14
#define IS_FILES_EXTENT_SIZE         15
#define IS_FILES_INITIAL_SIZE        16
#define IS_FILES_MAXIMUM_SIZE        17
#define IS_FILES_AUTOEXTEND_SIZE     18
#define IS_FILES_CREATION_TIME       19
#define IS_FILES_LAST_UPDATE_TIME    20
#define IS_FILES_LAST_ACCESS_TIME    21
#define IS_FILES_RECOVER_TIME        22
#define IS_FILES_TRANSACTION_COUNTER 23
#define IS_FILES_VERSION             24
#define IS_FILES_ROW_FORMAT          25
#define IS_FILES_TABLE_ROWS          26
#define IS_FILES_AVG_ROW_LENGTH      27
#define IS_FILES_DATA_LENGTH         28
#define IS_FILES_MAX_DATA_LENGTH     29
#define IS_FILES_INDEX_LENGTH        30
#define IS_FILES_DATA_FREE           31
#define IS_FILES_CREATE_TIME         32
#define IS_FILES_UPDATE_TIME         33
#define IS_FILES_CHECK_TIME          34
#define IS_FILES_CHECKSUM            35
#define IS_FILES_STATUS              36
#define IS_FILES_EXTRA               37

typedef enum { WITHOUT_DB_NAME, WITH_DB_NAME } enum_with_db_name;

int get_all_tables(THD *thd, TABLE_LIST *tables, COND *cond);

int show_create_table(THD *thd, TABLE_LIST *table_list, String *packet,
                      Table_specification_st *create_info_arg,
                      enum_with_db_name with_db_name);

int show_create_table_ex(THD *thd, TABLE_LIST *table_list,
                         const char * forced_db, const char *forced_name,
                         String *packet,
                         Table_specification_st *create_info_arg,
                         enum_with_db_name with_db_name);

int copy_event_to_schema_table(THD *thd, TABLE *sch_table, TABLE *event_table);

bool append_identifier(THD *thd, String *packet, const char *name, size_t length);
static inline bool append_identifier(THD *thd, String *packet, const LEX_CSTRING *name)
{
  return append_identifier(thd, packet, name->str, name->length);
}

bool append_identifier_opt_casedn(THD *thd, String *to,
                                  const LEX_CSTRING &ident, bool casedn);

void mysqld_list_fields(THD *thd,TABLE_LIST *table, const char *wild);
int mysqld_dump_create_info(THD *thd, TABLE_LIST *table_list, int fd);
bool mysqld_show_create_get_fields(THD *thd, TABLE_LIST *table_list,
                                   List<Item> *field_list, String *buffer);
bool mysqld_show_create(THD *thd, TABLE_LIST *table_list);
void mysqld_show_create_db_get_fields(THD *thd, List<Item> *field_list);
bool mysqld_show_create_db(THD *thd, LEX_CSTRING *db_name,
                           LEX_CSTRING *orig_db_name,
                           const DDL_options_st &options);

void mysqld_list_processes(THD *thd,const char *user,bool verbose);
int mysqld_show_status(THD *thd);
int mysqld_show_variables(THD *thd,const char *wild);
bool mysqld_show_storage_engines(THD *thd);
bool mysqld_show_authors(THD *thd);
bool mysqld_show_contributors(THD *thd);
bool mysqld_show_privileges(THD *thd);
char *make_backup_log_name(char *buff, const char *name, const char* log_ext);
uint calc_sum_of_all_status(STATUS_VAR *to);
bool append_definer(THD *thd, String *buffer, const LEX_CSTRING *definer_user,
                    const LEX_CSTRING *definer_host);
int add_status_vars(SHOW_VAR *list);
void remove_status_vars(SHOW_VAR *list);
ulonglong get_status_vars_version(void);
void init_status_vars();
void free_status_vars();
void reset_status_vars();
bool show_create_trigger(THD *thd, const sp_name *trg_name);
void view_store_options(THD *thd, TABLE_LIST *table, String *buff);

void init_fill_schema_files_row(TABLE* table);
void initialize_information_schema_acl();

ST_SCHEMA_TABLE *find_schema_table(THD *thd, const LEX_CSTRING *table_name,
                                   bool *in_plugin);
static inline ST_SCHEMA_TABLE *find_schema_table(THD *thd, const LEX_CSTRING *table_name)
{ bool unused; return find_schema_table(thd, table_name, &unused); }

ST_SCHEMA_TABLE *get_schema_table(enum enum_schema_tables schema_table_idx);
int make_schema_select(THD *thd,  SELECT_LEX *sel,
                       ST_SCHEMA_TABLE *schema_table);
int mysql_schema_table(THD *thd, LEX *lex, TABLE_LIST *table_list);
bool get_schema_tables_result(JOIN *join,
                              enum enum_schema_table_state executed_place);
enum enum_schema_tables get_schema_table_idx(ST_SCHEMA_TABLE *schema_table);
TABLE *create_schema_table(THD *thd, TABLE_LIST *table_list);

const char* get_one_variable(THD *thd, const SHOW_VAR *variable,
                             enum_var_type value_type, SHOW_TYPE show_type,
                             system_status_var *status_var,
                             const CHARSET_INFO **charset, char *buff,
                             size_t *length);

/* These functions were under INNODB_COMPATIBILITY_HOOKS */
int get_quote_char_for_identifier(THD *thd, const char *name, size_t length);
THD *find_thread_by_id(longlong id, bool query_id= false);

class select_result_explain_buffer;
/*
  SHOW EXPLAIN/SHOW ANALYZE request object.
*/

class Show_explain_request : public Apc_target::Apc_call
{
public:
  THD *target_thd;  /* thd that we're running SHOW EXPLAIN/ANALYZE for */
  THD *request_thd; /* thd that run SHOW EXPLAIN/ANALYZE command */
 
  /*
    Set to TRUE if you need the result in JSON format,
    FALSE - in traditional tabular
  */
  bool is_json_format= false;

/* FALSE for SHOW EXPLAIN, TRUE - for SHOW ANALYZE*/
  bool is_analyze;

/* If true, there was some error when producing EXPLAIN output. */
  bool failed_to_produce;
   
  /* SHOW EXPLAIN/ANALYZE will be stored here */
  select_result_explain_buffer *explain_buf;
  
  /* Query that we've got SHOW EXPLAIN/ANALYZE for */
  String query_str;
  
  void call_in_target_thread() override;
};

/**
  Condition pushdown used for INFORMATION_SCHEMA / SHOW queries.
  This structure is to implement an optimization when
  accessing data dictionary data in the INFORMATION_SCHEMA
  or SHOW commands.
  When the query contain a TABLE_SCHEMA or TABLE_NAME clause,
  narrow the search for data based on the constraints given.
*/
typedef struct st_lookup_field_values
{
  /**
    Value of a TABLE_SCHEMA clause.
    Note that this value length may exceed @c NAME_LEN.
    @sa wild_db_value
  */
  LEX_CSTRING db_value;
  /**
    Value of a TABLE_NAME clause.
    Note that this value length may exceed @c NAME_LEN.
    @sa wild_table_value
  */
  LEX_CSTRING table_value;
  /**
    True when @c db_value is a LIKE clause,
    false when @c db_value is an '=' clause.
  */
  bool wild_db_value;
  /**
    True when @c table_value is a LIKE clause,
    false when @c table_value is an '=' clause.
  */
  bool wild_table_value;
} LOOKUP_FIELD_VALUES;

/*
  INFORMATION_SCHEMA: Execution plan for get_all_tables() call
*/

class IS_table_read_plan : public Sql_alloc
{
public:
  IS_table_read_plan() : no_rows(false), trivial_show_command(FALSE) {}

bool no_rows;
  /*
    For EXPLAIN only: For SHOW KEYS and SHOW COLUMNS, we know which
    db_name.table_name will be read, however for some reason we don't
    set the fields in this->lookup_field_vals.
    In order to not have JOIN::save_explain_data() walking over uninitialized
    data, we set trivial_show_command=true.
  */
  bool trivial_show_command;

LOOKUP_FIELD_VALUES lookup_field_vals;
  Item *partial_cond;

bool has_db_lookup_value()
  {
    return (lookup_field_vals.db_value.length &&
           !lookup_field_vals.wild_db_value);
  }
  bool has_table_lookup_value()
  {
    return (lookup_field_vals.table_value.length &&
            !lookup_field_vals.wild_table_value);
  }
};

bool optimize_schema_tables_reads(JOIN *join);
bool optimize_schema_tables_memory_usage(List<TABLE_LIST> &tables);

/* Handle the ignored database directories list for SHOW/I_S. */
bool ignore_db_dirs_init();
void ignore_db_dirs_free();
void ignore_db_dirs_reset();
bool ignore_db_dirs_process_additions();
bool push_ignored_db_dir(const char *path);
extern char *opt_ignore_db_dirs;

#endif /* SQL_SHOW_H */

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