Current File : //usr/include/mysql/server/private/sql_show.h
/* Copyright (c) 2005, 2010, Oracle and/or its affiliates.
Copyright (c) 2012, 2016, MariaDB
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);
}
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 request object.
*/
class Show_explain_request : public Apc_target::Apc_call
{
public:
THD *target_thd; /* thd that we're running SHOW EXPLAIN for */
THD *request_thd; /* thd that run SHOW EXPLAIN command */
/* If true, there was some error when producing EXPLAIN output. */
bool failed_to_produce;
/* SHOW EXPLAIN will be stored here */
select_result_explain_buffer *explain_buf;
/* Query that we've got SHOW EXPLAIN for */
String query_str;
/* Overloaded virtual function */
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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