MySQL  8.0.16
Source Code Documentation
dd::info_schema Namespace Reference

Classes

class  Select_lex_builder
 This class provide framework to build a SELECT_LEX using ParseTree nodes. More...
 
class  Table_statistics
 The class hold dynamic table statistics for a table. More...
 
class  Tablespace_statistics
 The class hold dynamic table statistics for a table. More...
 

Enumerations

enum  enum_table_stats_type {
  enum_table_stats_type::TABLE_ROWS, enum_table_stats_type::TABLE_AVG_ROW_LENGTH, enum_table_stats_type::DATA_LENGTH, enum_table_stats_type::MAX_DATA_LENGTH,
  enum_table_stats_type::INDEX_LENGTH, enum_table_stats_type::DATA_FREE, enum_table_stats_type::AUTO_INCREMENT, enum_table_stats_type::CHECKSUM,
  enum_table_stats_type::TABLE_UPDATE_TIME, enum_table_stats_type::CHECK_TIME, enum_table_stats_type::INDEX_COLUMN_CARDINALITY
}
 
enum  enum_tablespace_stats_type {
  enum_tablespace_stats_type::TS_ID, enum_tablespace_stats_type::TS_TYPE, enum_tablespace_stats_type::TS_LOGFILE_GROUP_NAME, enum_tablespace_stats_type::TS_LOGFILE_GROUP_NUMBER,
  enum_tablespace_stats_type::TS_FREE_EXTENTS, enum_tablespace_stats_type::TS_TOTAL_EXTENTS, enum_tablespace_stats_type::TS_EXTENT_SIZE, enum_tablespace_stats_type::TS_INITIAL_SIZE,
  enum_tablespace_stats_type::TS_MAXIMUM_SIZE, enum_tablespace_stats_type::TS_AUTOEXTEND_SIZE, enum_tablespace_stats_type::TS_VERSION, enum_tablespace_stats_type::TS_ROW_FORMAT,
  enum_tablespace_stats_type::TS_DATA_FREE, enum_tablespace_stats_type::TS_STATUS, enum_tablespace_stats_type::TS_EXTRA
}
 

Functions

bool create_system_views (THD *thd)
 Create INFORMATION_SCHEMA system views. More...
 
bool store_server_I_S_metadata (THD *thd)
 Store the server I_S table metadata into dictionary, once during MySQL server bootstrap. More...
 
bool update_I_S_metadata (THD *thd)
 Store I_S table metadata into dictionary, during MySQL server startup. More...
 
bool store_dynamic_plugin_I_S_metadata (THD *thd, st_plugin_int *plugin_int)
 Store dynamic I_S plugin table metadata into dictionary, during INSTALL command execution. More...
 
bool remove_I_S_view_metadata (THD *thd, const dd::String_type &view_name)
 Remove I_S view metadata from dictionary. More...
 
bool initialize (THD *thd)
 Initialize INFORMATION_SCHEMA system views. More...
 
SELECT_LEXbuild_show_character_set_query (const POS &pos, THD *thd, const String *wild, Item *where_cond)
 Build a substitute query for SHOW CHARSETS. More...
 
SELECT_LEXbuild_show_collation_query (const POS &pos, THD *thd, const String *wild, Item *where_cond)
 Build a substitute query for SHOW COLLATION. More...
 
SELECT_LEXbuild_show_databases_query (const POS &pos, THD *thd, String *wild, Item *where_cond)
 Build a substitute query for SHOW DATABASES. More...
 
static bool add_table_status_fields (Select_lex_builder *query, bool alias_as_alias)
 Add fields required by SHOW TABLE STATUS. More...
 
SELECT_LEXbuild_show_tables_query (const POS &pos, THD *thd, String *wild, Item *where_cond, bool include_status_fields)
 Build a substitute query for SHOW TABLES / TABLE STATUS. More...
 
SELECT_LEXbuild_show_columns_query (const POS &pos, THD *thd, Table_ident *table_ident, const String *wild, Item *where_cond)
 Build a substitute query for SHOW COLUMNS/FIELDS OR DESCRIBE. More...
 
SELECT_LEXbuild_show_keys_query (const POS &pos, THD *thd, Table_ident *table_ident, Item *where_cond)
 Build a substitute query for SHOW INDEX|KEYS|INDEXES. More...
 
SELECT_LEXbuild_show_triggers_query (const POS &pos, THD *thd, String *wild, Item *where_cond)
 Build a substitute query for SHOW TRIGGERS. More...
 
SELECT_LEXbuild_show_procedures_query (const POS &pos, THD *thd, String *wild, Item *where_cond)
 Build a substitute query for SHOW PROCEDURE/FUNCTION STATUS. More...
 
SELECT_LEXbuild_show_events_query (const POS &pos, THD *thd, String *wild, Item *where_cond)
 Build a substitute query for SHOW EVENTS. More...
 
bool update_table_stats (THD *thd, TABLE_LIST *table)
 Get dynamic table statistics of a table and store them into mysql.table_stats. More...
 
bool update_index_stats (THD *thd, TABLE_LIST *table)
 Get dynamic index statistics of a table and store them into mysql.index_stats. More...
 
bool convert_table_name_case (char *db, char *table_name)
 If the db is 'information_schema' then convert 'db' to lowercase and 'table_name' to upper case. More...
 

Variables

static const uint IS_DD_VERSION = 80016
 The version of the current information_schema system views. More...
 
static const Query_options options
 

Enumeration Type Documentation

◆ enum_table_stats_type

Enumerator
TABLE_ROWS 
TABLE_AVG_ROW_LENGTH 
DATA_LENGTH 
MAX_DATA_LENGTH 
INDEX_LENGTH 
DATA_FREE 
AUTO_INCREMENT 
CHECKSUM 
TABLE_UPDATE_TIME 
CHECK_TIME 
INDEX_COLUMN_CARDINALITY 

◆ enum_tablespace_stats_type

Enumerator
TS_ID 
TS_TYPE 
TS_LOGFILE_GROUP_NAME 
TS_LOGFILE_GROUP_NUMBER 
TS_FREE_EXTENTS 
TS_TOTAL_EXTENTS 
TS_EXTENT_SIZE 
TS_INITIAL_SIZE 
TS_MAXIMUM_SIZE 
TS_AUTOEXTEND_SIZE 
TS_VERSION 
TS_ROW_FORMAT 
TS_DATA_FREE 
TS_STATUS 
TS_EXTRA 

Function Documentation

◆ add_table_status_fields()

static bool dd::info_schema::add_table_status_fields ( Select_lex_builder query,
bool  alias_as_alias 
)
static

Add fields required by SHOW TABLE STATUS.

Parameters
query- Select_lex_builder to which we add fields.
alias_as_alias- Add select items of the form, 'alias AS alias'. This is required for top level query, as the real field names would be valied only the sub query that we are building for SHOW TABLE STATUS. Check comments in sql/dd/show.h for more details.
Returns
false on success. true on failure.

◆ build_show_character_set_query()

SELECT_LEX * dd::info_schema::build_show_character_set_query ( const POS pos,
THD thd,
const String wild,
Item where_cond 
)

Build a substitute query for SHOW CHARSETS.

For command like,

SHOW CHARACTER SET [ LIKE 'pattern' | WHERE expr ]

We build following,

SELECT * FROM
(SELECT CHARACTER_SET_NAME as `Charset`,
DESCRIPTION as `Description`,
DEFAULT_COLLATE_NAME as `Default collation`,
MAXLEN as `Maxlen`
FROM information_schema.character_sets) character_sets
[ WHERE Charset LIKE "<value>" | WHERE @<where_clause@> ]
ORDER BY `Charset`;
Parameters
pos- YYLTYPE position of parsing context.
thd- Current thread.
wild- The value of LIKE clause.
where_cond- <where_clause> clause provided by user.
Returns
pointer to SELECT_LEX on success, NULL otherwise.

◆ build_show_collation_query()

SELECT_LEX * dd::info_schema::build_show_collation_query ( const POS pos,
THD thd,
const String wild,
Item where_cond 
)

Build a substitute query for SHOW COLLATION.

For command like,

SHOW COLLATION [ LIKE 'pattern' | WHERE expr ]

We build following,

SELECT * FROM
(SELECT COLLATION_NAME as `Collation`,
CHARACTER_SET_NAME as `Charset`,
ID as `Id`,
IS_COMPILED as `Compiled`,
SORTLEN as `Sortlen`,
PAD_ATTRIBUTE as `Pad_attribute`,
FROM information_schema.collations) collations
[ WHERE Collation LIKE "<value>" | WHERE @<where_clause@> ]
ORDER BY `Collation`;
Parameters
pos- YYLTYPE position of parsing context.
thd- Current thread.
wild- The value of LIKE clause.
where_cond- <where_clause> clause provided by user.
Returns
pointer to SELECT_LEX on success, NULL otherwise.

◆ build_show_columns_query()

SELECT_LEX * dd::info_schema::build_show_columns_query ( const POS pos,
THD thd,
Table_ident table_ident,
const String wild,
Item where_cond 
)

Build a substitute query for SHOW COLUMNS/FIELDS OR DESCRIBE.

For command like,

SHOW [FULL] COLUMNS
{FROM | IN} tbl_name
[{FROM | IN} db_name]
[LIKE 'pattern' | WHERE expr]
OR
DESCRIBE tbl_name

We build following,

Collation, <-- only with 'FULL'
Null,
Key,
Extra,
Privileges, <-- only with 'FULL'
Comment <-- only with 'FULL'
FROM
(SELECT TABLE_SCHEMA AS Database,
TABLE_NAME AS Table,
COLUMN_NAME AS Field,
COLUMN_TYPE AS Type,
COLLATION_NAME AS Collation, <-- only with 'FULL'
IS_NULLABLE AS Null,
COLUMN_KEY AS Key,
COLUMN_DEFAULT AS Default,
EXTRA AS Extra,
PRIVILEGES AS Privileges, <-- only with 'FULL'
COLUMN_COMMENT AS Comment, <-- only with 'FULL'
ORDINAL_POSITION AS Oridinal_position
FROM information_schema.columns) columns
WHERE Database == '<value>' <-- Default DB or db_name
AND
Table == 'value' <-- tbl_name
AND
[ Field LIKE "<value>" | @<where_clause@> ]
ORDER BY `Ordinal_position`;

Note that the thd->lex->verbose == true would mean user has provide keyword 'FULL'.

Parameters
pos- YYLTYPE position of parsing context.
thd- Current thread.
table_ident- Database and Table name of table being used.
wild- The value of LIKE clause.
where_cond- <where_clause> clause provided by user.
Returns
pointer to SELECT_LEX on success, NULL otherwise.

◆ build_show_databases_query()

SELECT_LEX * dd::info_schema::build_show_databases_query ( const POS pos,
THD thd,
String wild,
Item where_cond 
)

Build a substitute query for SHOW DATABASES.

For command like,

SHOW DATABASES [ LIKE 'pattern' | WHERE expr ]

We build following,

(SELECT SCHEMA_NAME as `Database`,
FROM information_schema.schemata) schemata
[ WHERE Database LIKE "<value>" | WHERE @<where_clause@> ]
Parameters
pos- YYLTYPE position of parsing context.
thd- Current thread.
wild- The value of LIKE clause.
where_cond- <where_clause> clause provided by user.
Returns
pointer to SELECT_LEX on success, NULL otherwise.

◆ build_show_events_query()

SELECT_LEX * dd::info_schema::build_show_events_query ( const POS pos,
THD thd,
String wild,
Item where_cond 
)

Build a substitute query for SHOW EVENTS.

For command like,

SHOW EVENTS [{FROM | IN} schema_name]
[LIKE 'pattern' | WHERE expr]

We build following,

Db,
Name,
Definer,
Time zone,
Execute at,
Interval field,
Starts,
Ends,
Status,
Originator,
character_set_client,
collation_connection,
Database_collation AS Database Collation
FROM
EVENT_SCHEMA AS `Db`,
EVENT_NAME AS `Name`,
DEFINER AS `Definer`,
TIME_ZONE AS `Time zone`,
EVENT_TYPE AS `Type`,
EXECUTE_AT AS `Execute at`,
INTERVAL_VALUE AS `Interval value`,
INTERVAL_FIELD AS `Interval field`,
STARTS AS `Starts`,
ENDS AS `Ends`,
STATUS AS `Status`,
ORIGINATOR AS `Originator`,
CHARACTER_SET_CLIENT AS `character_set_client`,
COLLATION_CONNECTION AS `collation_connection`,
DATABASE_COLLATION AS `Database Collation`
FROM information_schema.events) as events
WHERE Db == '<value>' <-- Default DB or IN clause
AND
[ Name LIKE "<value>" | @<where_clause@> ]
ORDER BY `Db`, `Name`;
Parameters
pos- YYLTYPE position of parsing context.
thd- Current thread.
wild- The value of LIKE clause.
where_cond- <where_clause> clause provided by user.
Returns
pointer to SELECT_LEX on success, NULL otherwise.

◆ build_show_keys_query()

SELECT_LEX * dd::info_schema::build_show_keys_query ( const POS pos,
THD thd,
Table_ident table_ident,
Item where_cond 
)

Build a substitute query for SHOW INDEX|KEYS|INDEXES.

For command like,

SHOW {INDEX | INDEXES | KEYS}
{FROM | IN} tbl_name
[{FROM | IN} db_name]
[WHERE expr]

We build following,

Non_unique,
Key_name,
Seq_in_index,
Column_name,
Collation,
Cardinality,
Sub_part,
Packed,
Null,
Index_type,
Comment,
Index_comment,
Visible
FROM
Non_unique,
Key_name,
Seq_in_index,
Column_name,
Collation,
Cardinality,
Sub_part,
Packed,
Null,
Index_type,
Comment,
Index_comment,
Visible,
INDEX_ORDINAL_POSITION,
COLUMN_ORDINAL_POSITION
FROM information_schema.show_statistics) statistics
WHERE Database == '<value>' <-- Default DB or db_name
AND
Table == 'value' <-- tbl_name
AND
[ @<where_clause@> ]
ORDER BY INDEX_ORDINAL_POSITION, COLUMN_ORDINAL_POSITION
Parameters
pos- YYLTYPE position of parsing context.
thd- Current thread.
table_ident- Database and Table name of table being used.
where_cond- <where_clause> clause provided by user.
Returns
pointer to SELECT_LEX on success, NULL otherwise.

◆ build_show_procedures_query()

SELECT_LEX * dd::info_schema::build_show_procedures_query ( const POS pos,
THD thd,
String wild,
Item where_cond 
)

Build a substitute query for SHOW PROCEDURE/FUNCTION STATUS.

For command like,

[LIKE 'pattern' | WHERE expr]

We build following,

Db,
Name,
Definer,
Modified,
Security_type,
Comment,
character_set_client,
collation_connection,
Database_collation AS `Database Collation`
FROM
ROUTINE_SCHEMA AS `Db`,
ROUTINE_NAME AS `Name`,
ROUTINE_TYPE AS `Type`,
DEFINER AS `Definer`,
LAST_ALTERED AS `Modified`,
CREATED AS `Created`,
SECURITY_TYPE AS `Security_type`,
ROUTINE_COMMENT AS `Comment`,
CHARACTER_SET_CLIENT AS `character_set_client,
COLLATION_CONNECTION AS `collation_connection,
DATABASE_COLLATION AS `Database Collation`
FROM information_schema.routines) routines
WHERE Db == '<value>' <-- Default DB or IN clause
AND
[ Name LIKE "<value>" | @<where_clause@> ]
ORDER BY `Db`, `Name`;
Parameters
pos- YYLTYPE position of parsing context.
thd- Current thread.
wild- The value of LIKE clause.
where_cond- <where_clause> clause provided by user.
Returns
pointer to SELECT_LEX on success, NULL otherwise.

◆ build_show_tables_query()

SELECT_LEX * dd::info_schema::build_show_tables_query ( const POS pos,
THD thd,
String wild,
Item where_cond,
bool  include_status_fields 
)

Build a substitute query for SHOW TABLES / TABLE STATUS.

For command like,

SHOW [FULL] TABLES [{FROM | IN} db_name]
[LIKE 'pattern' | WHERE expr]
OR
SHOW TABLE STATUS [{FROM | IN} db_name]
[LIKE 'pattern' | WHERE expr]

We build following,

`Table_type`, <-- only with 'FULL'
// For SHOW TABLE STATUS
`Engine`,
`Row_format`,
`Rows`,
`Avg_row_length`,
`Data_length`,
`Max_data_length`,
`Index_length`,
`Data_free`,
`Auto_increment`,
`Create_time`,
`Update_time`,
`Check_time`,
`Collation`,
`Checksum`,
`Create_options`,
`Comment`
FROM
(SELECT TABLE_SCHEMA AS `Database`,
TABLE_NAME as `Table`,
TABLE_TYPE AS `Table_type`, <-- only with 'FULL'
// For SHOW TABLE STATUS
ENGINE AS `Engine`,
ROW_FORMAT AS `Row_format`,
TABLE_ROWS AS `Rows`,
AVG_ROW_LENGTH AS `Avg_row_length`,
DATA_LENGTH AS `Data_length`,
MAX_DATA_LENGTH AS `Max_data_length`,
INDEX_LENGTH AS `Index_length`,
DATA_FREE AS `Data_free`,
AUTO_INCREMENT AS `Auto_increment`,
CREATE_TIME AS `Create_time`,
UPDATE_TIME AS `Update_time`,
CHECK_TIME AS `Check_time`,
TABLE_COLLATION AS `Collation`,
CHECKSUM AS `Checksum`,
CREATE_OPTIONS AS `Create_options`,
TABLE_COMMENT AS `Comment`
FROM information_schema.tables) tables
WHERE Database == '<value>' <-- Default DB or IN clause
AND
[ Table LIKE "<value>" | @<where_clause@> ]
ORDER BY `Table`;

Note that the thd->lex->verbose == true would mean user has provide keyword 'FULL'.

Parameters
pos- YYLTYPE position of parsing context.
thd- Current thread.
wild- The value of LIKE clause.
where_cond- <where_clause> clause provided by user.
include_status_fields- If we are handling SHOW TABLE STATUS
Returns
pointer to SELECT_LEX on success, NULL otherwise.

◆ build_show_triggers_query()

SELECT_LEX * dd::info_schema::build_show_triggers_query ( const POS pos,
THD thd,
String wild,
Item where_cond 
)

Build a substitute query for SHOW TRIGGERS.

For command like,

SHOW TRIGGERS [{FROM | IN} db_name]
[LIKE 'pattern' | WHERE expr]

We build following,

Event,
Statement,
Timing,
Definer,
character_set_client,
collation_connection,
Database_collation AS `Database Collation`
FROM
EVENT_OBJECT_SCHEMA AS `Database`
TRIGGER_NAME AS `Trigger`,
EVENT_MANIPULATION AS `Event`,
EVENT_OBJECT_TABLE AS `Table`,
ACTION_STATEMENT AS `Statement`,
ACTION_TIMING AS `Timing`,
CREATED AS `Created`,
SQL_MODE AS `sql_mode`,
DEFINER AS `Definer`,
CHARACTER_SET_CLIENT AS `character_set_client`,
COLLATION_CONNECTION AS `collation_connection`,
DATABASE_COLLATION AS `Database_collation`,
ACTION_ORDER AS `action_order`
FROM information_schema.triggers) triggers
WHERE Database == '<value>' <-- Default DB or IN clause
AND
[ Table LIKE "<value>" | @<where_clause@> ]
ORDER BY `Table`, `Event`, `Timing`, `action_order`;
Parameters
pos- YYLTYPE position of parsing context.
thd- Current thread.
wild- The value of LIKE clause.
where_cond- <where_clause> clause provided by user.
Returns
pointer to SELECT_LEX on success, NULL otherwise.

◆ convert_table_name_case()

bool dd::info_schema::convert_table_name_case ( char *  db,
char *  table_name 
)

If the db is 'information_schema' then convert 'db' to lowercase and 'table_name' to upper case.

Mainly because all information schema tables are stored in upper case in server.

Parameters
dbDatabase name
table_nameTable name.
Returns
true if the conversion was done. false if not.

◆ create_system_views()

bool dd::info_schema::create_system_views ( THD thd)

Create INFORMATION_SCHEMA system views.

Parameters
thdThread context.
Returns
Upon failure, return true, otherwise false.

◆ initialize()

bool dd::info_schema::initialize ( THD thd)

Initialize INFORMATION_SCHEMA system views.

Parameters
thdThread context.
Returns
Upon failure, return true, otherwise false.

◆ remove_I_S_view_metadata()

bool dd::info_schema::remove_I_S_view_metadata ( THD thd,
const dd::String_type view_name 
)

Remove I_S view metadata from dictionary.

This is used UNINSTALL and server restart procedure when I_S version is changed.

Parameters
thdThread context.
view_nameI_S view name of which the metadata is to be stored.
Returns
Upon failure, return true, otherwise false.

◆ store_dynamic_plugin_I_S_metadata()

bool dd::info_schema::store_dynamic_plugin_I_S_metadata ( THD thd,
st_plugin_int plugin_int 
)

Store dynamic I_S plugin table metadata into dictionary, during INSTALL command execution.

Parameters
thdThread context.
plugin_intI_S Plugin of which the metadata is to be stored.
Returns
Upon failure, return true, otherwise false.

◆ store_server_I_S_metadata()

bool dd::info_schema::store_server_I_S_metadata ( THD thd)

Store the server I_S table metadata into dictionary, once during MySQL server bootstrap.

Parameters
thdThread context.
Returns
Upon failure, return true, otherwise false.

◆ update_I_S_metadata()

bool dd::info_schema::update_I_S_metadata ( THD thd)

Store I_S table metadata into dictionary, during MySQL server startup.

Parameters
thdThread context.
Returns
Upon failure, return true, otherwise false.

◆ update_index_stats()

bool dd::info_schema::update_index_stats ( THD thd,
TABLE_LIST table 
)

Get dynamic index statistics of a table and store them into mysql.index_stats.

Parameters
thdThread.
tableTABLE_LIST pointing to table info.
Returns
false on success. true on failure.

◆ update_table_stats()

bool dd::info_schema::update_table_stats ( THD thd,
TABLE_LIST table 
)

Get dynamic table statistics of a table and store them into mysql.table_stats.

Parameters
thdThread.
tableTABLE_LIST pointing to table info.
Returns
false on success. true on failure.

Variable Documentation

◆ IS_DD_VERSION

const uint dd::info_schema::IS_DD_VERSION = 80016
static

The version of the current information_schema system views.

This version number is stored on disk in the data dictionary. Every time the information_schema structure changes, this version number must change.

The numbering to use is the MySQL version number of the first MySQL version that published a given database schema. The format is Mmmdd with M=Major, m=minor, d=dot, so that MySQL 8.0.4 is encoded as 80004.

Historical I_S version number published:

1: Published in 8.0.3-RC.

Introduced in MySQL 8.0.0 by WL#6599. Never published in a GA version.

80011: Published in 8.0 GA.

Changes from version 1:

  • Bug#27309116: Add a new column external_language to mysql.routines and update information_schema.routines to reflect this column.
  • Bug#27593348: INFORMATION_SCHEMA.STATISTICS FIELD TYPE CHANGE. Changes the column I_S.STATISTICS.NON_UNIQUE type from VARCHAR to INT.

Current 80012: Published in 8.0.12

Changes from version 80011:

  • Bug#27945704 UNABLE TO JOIN TABLE_CONSTRAINTS AND REFERENTIAL_CONSTRAINTS Changes the collation of I_S columns that project index name and constraint name to use utf8_tolower_ci.
  • WL#11864 Implement I_S.VIEW_TABLE_USAGE and I_S.VIEW_ROUTINE_USAGE
  • WL#1075 adds one column to INFORMATION_SCHEMA.STATISTICS: "EXPRESSION". This column prints out the expression for functional key parts, or SQL NULL if it is a regular key part. For functional key parts, COLUMN_NAME is set to SQL NULL.

80013: Published in 8.0.13

Changes from version 80012

  • WL#11000 ST_Distance with units Adds a new view information_schema.st_units_of_measure with columns UNIT_NAME, CONVERSION_FACTOR, DESCRIPTION, and UNIT_TYPE. This view contains the supported spatial units.

80014: Published in 8.0.14

There are no changes from version 80013. Hence server version 80014 used I_S version 80013.

80015: Not published.

There are no changes from version 80014. Hence server version 80015 used I_S version 80013.

80016: Current

Changes from version 80015.

  • WL#929 - CHECK CONSTRAINTS New INFORMATION_SCHMEA table CHECK_CONSTRAINTS is introduced and INFORMATION_SCHMEA.TABLE_CONSTRAINTS is modified to include check constraints defined on the table.
  • WL#12261 Control (enforce and disable) table encryption
    • Add new column information_schema.schemata.default_encryption
    • information_schema.tables.options UDF definition is changed to pass schema default encryption.

80017: Next IS version number after the previous is public.

Changes from version 80016:

  • No changes, this version number is not active yet.

◆ options

const Query_options dd::info_schema::options
static
Initial value:
= {
}
#define OPTION_SELECT_FOR_SHOW
Definition: query_options.h:121