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mariadb/sql/ha_innodb.h
unknown 61c8e6ca16 Bug #20358: InnoDB hang on the adaptive hash index latch in btr0sea.c 
Add --skip-innodb-adaptive-hash-index option, which is a way to
work around the bug (by disabling the adaptive hash feature entirely).

This may be useful even once the bug is fixed, for benchmarking purposes.
There are some workloads for which the adaptive hash index is not effective.


sql/ha_innodb.cc:
  Add --skip-innodb-adaptive-hash-index option.
sql/ha_innodb.h:
  Add --skip-innodb-adaptive-hash-index option.
sql/mysqld.cc:
  Add --skip-innodb-adaptive-hash-index option.
sql/set_var.cc:
  Add --skip-innodb-adaptive-hash-index option.
2007-10-02 23:47:30 -06:00

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/* Copyright (C) 2000-2005 MySQL AB && Innobase Oy
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/*
This file is based on ha_berkeley.h of MySQL distribution
This file defines the Innodb handler: the interface between MySQL and
Innodb
*/
#ifdef USE_PRAGMA_INTERFACE
#pragma interface /* gcc class implementation */
#endif
typedef struct st_innobase_share {
THR_LOCK lock;
pthread_mutex_t mutex;
char *table_name;
uint table_name_length,use_count;
} INNOBASE_SHARE;
my_bool innobase_query_caching_of_table_permitted(THD* thd, char* full_name,
uint full_name_len,
ulonglong *unused);
/* The class defining a handle to an Innodb table */
class ha_innobase: public handler
{
void* innobase_prebuilt;/* (row_prebuilt_t*) prebuilt
struct in InnoDB, used to save
CPU time with prebuilt data
structures*/
THD* user_thd; /* the thread handle of the user
currently using the handle; this is
set in external_lock function */
query_id_t last_query_id; /* the latest query id where the
handle was used */
THR_LOCK_DATA lock;
INNOBASE_SHARE *share;
byte* upd_buff; /* buffer used in updates */
byte* key_val_buff; /* buffer used in converting
search key values from MySQL format
to Innodb format */
ulong upd_and_key_val_buff_len;
/* the length of each of the previous
two buffers */
ulong int_table_flags;
uint primary_key;
ulong start_of_scan; /* this is set to 1 when we are
starting a table scan but have not
yet fetched any row, else 0 */
uint last_match_mode;/* match mode of the latest search:
ROW_SEL_EXACT, ROW_SEL_EXACT_PREFIX,
or undefined */
uint num_write_row; /* number of write_row() calls */
uint store_key_val_for_row(uint keynr, char* buff, uint buff_len,
const byte* record);
int update_thd(THD* thd);
int change_active_index(uint keynr);
int general_fetch(byte* buf, uint direction, uint match_mode);
int innobase_read_and_init_auto_inc(longlong* ret);
/* Init values for the class: */
public:
ha_innobase(TABLE *table_arg);
~ha_innobase() {}
/*
Get the row type from the storage engine. If this method returns
ROW_TYPE_NOT_USED, the information in HA_CREATE_INFO should be used.
*/
enum row_type get_row_type() const;
const char* table_type() const { return("InnoDB");}
const char *index_type(uint key_number) { return "BTREE"; }
const char** bas_ext() const;
ulong table_flags() const { return int_table_flags; }
ulong index_flags(uint idx, uint part, bool all_parts) const
{
return (HA_READ_NEXT |
HA_READ_PREV |
HA_READ_ORDER |
HA_READ_RANGE |
HA_KEYREAD_ONLY);
}
uint max_supported_keys() const { return MAX_KEY; }
/* An InnoDB page must store >= 2 keys;
a secondary key record must also contain the
primary key value:
max key length is therefore set to slightly
less than 1 / 4 of page size which is 16 kB;
but currently MySQL does not work with keys
whose size is > MAX_KEY_LENGTH */
uint max_supported_key_length() const { return 3500; }
uint max_supported_key_part_length() const;
const key_map *keys_to_use_for_scanning() { return &key_map_full; }
bool has_transactions() { return 1;}
int open(const char *name, int mode, uint test_if_locked);
int close(void);
double scan_time();
double read_time(uint index, uint ranges, ha_rows rows);
int write_row(byte * buf);
int update_row(const byte * old_data, byte * new_data);
int delete_row(const byte * buf);
void unlock_row();
int index_init(uint index);
int index_end();
int index_read(byte * buf, const byte * key,
uint key_len, enum ha_rkey_function find_flag);
int index_read_idx(byte * buf, uint index, const byte * key,
uint key_len, enum ha_rkey_function find_flag);
int index_read_last(byte * buf, const byte * key, uint key_len);
int index_next(byte * buf);
int index_next_same(byte * buf, const byte *key, uint keylen);
int index_prev(byte * buf);
int index_first(byte * buf);
int index_last(byte * buf);
int rnd_init(bool scan);
int rnd_end();
int rnd_next(byte *buf);
int rnd_pos(byte * buf, byte *pos);
void position(const byte *record);
int info(uint);
int analyze(THD* thd,HA_CHECK_OPT* check_opt);
int optimize(THD* thd,HA_CHECK_OPT* check_opt);
int discard_or_import_tablespace(my_bool discard);
int extra(enum ha_extra_function operation);
int external_lock(THD *thd, int lock_type);
int transactional_table_lock(THD *thd, int lock_type);
int start_stmt(THD *thd, thr_lock_type lock_type);
void position(byte *record);
ha_rows records_in_range(uint inx, key_range *min_key, key_range
*max_key);
ha_rows estimate_rows_upper_bound();
void update_create_info(HA_CREATE_INFO* create_info);
int create(const char *name, register TABLE *form,
HA_CREATE_INFO *create_info);
int delete_all_rows();
int delete_table(const char *name);
int rename_table(const char* from, const char* to);
int check(THD* thd, HA_CHECK_OPT* check_opt);
char* update_table_comment(const char* comment);
char* get_foreign_key_create_info();
int get_foreign_key_list(THD *thd, List<FOREIGN_KEY_INFO> *f_key_list);
bool can_switch_engines();
uint referenced_by_foreign_key();
void free_foreign_key_create_info(char* str);
THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to,
enum thr_lock_type lock_type);
void init_table_handle_for_HANDLER();
ulonglong get_auto_increment();
int reset_auto_increment(ulonglong value);
virtual bool get_error_message(int error, String *buf);
uint8 table_cache_type() { return HA_CACHE_TBL_ASKTRANSACT; }
/*
ask handler about permission to cache table during query registration
*/
my_bool register_query_cache_table(THD *thd, char *table_key,
uint key_length,
qc_engine_callback *call_back,
ulonglong *engine_data)
{
*call_back= innobase_query_caching_of_table_permitted;
*engine_data= 0;
return innobase_query_caching_of_table_permitted(thd, table_key,
key_length,
engine_data);
}
static char *get_mysql_bin_log_name();
static ulonglong get_mysql_bin_log_pos();
bool primary_key_is_clustered() { return true; }
int cmp_ref(const byte *ref1, const byte *ref2);
};
extern struct show_var_st innodb_status_variables[];
extern ulong innobase_fast_shutdown;
extern ulong innobase_large_page_size;
extern long innobase_mirrored_log_groups, innobase_log_files_in_group;
extern longlong innobase_buffer_pool_size, innobase_log_file_size;
extern long innobase_log_buffer_size;
extern long innobase_additional_mem_pool_size;
extern long innobase_buffer_pool_awe_mem_mb;
extern long innobase_file_io_threads, innobase_lock_wait_timeout;
extern long innobase_force_recovery;
extern long innobase_open_files;
extern char *innobase_data_home_dir, *innobase_data_file_path;
extern char *innobase_log_group_home_dir, *innobase_log_arch_dir;
extern char *innobase_unix_file_flush_method;
/* The following variables have to be my_bool for SHOW VARIABLES to work */
extern my_bool innobase_log_archive,
innobase_use_doublewrite,
innobase_use_checksums,
innobase_use_large_pages,
innobase_use_native_aio,
innobase_file_per_table, innobase_locks_unsafe_for_binlog,
innobase_rollback_on_timeout,
innobase_create_status_file,
innobase_adaptive_hash_index;
extern my_bool innobase_very_fast_shutdown; /* set this to 1 just before
calling innobase_end() if you want
InnoDB to shut down without
flushing the buffer pool: this
is equivalent to a 'crash' */
extern "C" {
extern ulong srv_max_buf_pool_modified_pct;
extern ulong srv_max_purge_lag;
extern ulong srv_auto_extend_increment;
extern ulong srv_n_spin_wait_rounds;
extern ulong srv_n_free_tickets_to_enter;
extern ulong srv_thread_sleep_delay;
extern ulong srv_thread_concurrency;
extern ulong srv_commit_concurrency;
extern ulong srv_flush_log_at_trx_commit;
}
bool innobase_init(void);
bool innobase_end(void);
bool innobase_flush_logs(void);
uint innobase_get_free_space(void);
/*
don't delete it - it may be re-enabled later
as an optimization for the most common case InnoDB+binlog
*/
#if 0
int innobase_report_binlog_offset_and_commit(
THD* thd,
void* trx_handle,
char* log_file_name,
my_off_t end_offset);
int innobase_commit_complete(void* trx_handle);
void innobase_store_binlog_offset_and_flush_log(char *binlog_name,longlong offset);
#endif
int innobase_drop_database(char *path);
bool innodb_show_status(THD* thd);
bool innodb_mutex_show_status(THD* thd);
void innodb_export_status(void);
void innobase_release_temporary_latches(THD *thd);
void innobase_store_binlog_offset_and_flush_log(char *binlog_name,longlong offset);
int innobase_start_trx_and_assign_read_view(THD* thd);
/***********************************************************************
This function is used to prepare X/Open XA distributed transaction */
int innobase_xa_prepare(
/*====================*/
/* out: 0 or error number */
THD* thd, /* in: handle to the MySQL thread of the user
whose XA transaction should be prepared */
bool all); /* in: TRUE - commit transaction
FALSE - the current SQL statement ended */
/***********************************************************************
This function is used to recover X/Open XA distributed transactions */
int innobase_xa_recover(
/*====================*/
/* out: number of prepared transactions
stored in xid_list */
XID* xid_list, /* in/out: prepared transactions */
uint len); /* in: number of slots in xid_list */
/***********************************************************************
This function is used to commit one X/Open XA distributed transaction
which is in the prepared state */
int innobase_commit_by_xid(
/*=======================*/
/* out: 0 or error number */
XID* xid); /* in : X/Open XA Transaction Identification */
/***********************************************************************
This function is used to rollback one X/Open XA distributed transaction
which is in the prepared state */
int innobase_rollback_by_xid(
/* out: 0 or error number */
XID *xid); /* in : X/Open XA Transaction Identification */
/***********************************************************************
Create a consistent view for a cursor based on current transaction
which is created if the corresponding MySQL thread still lacks one.
This consistent view is then used inside of MySQL when accessing records
using a cursor. */
void*
innobase_create_cursor_view(void);
/*=============================*/
/* out: Pointer to cursor view or NULL */
/***********************************************************************
Close the given consistent cursor view of a transaction and restore
global read view to a transaction read view. Transaction is created if the
corresponding MySQL thread still lacks one. */
void
innobase_close_cursor_view(
/*=======================*/
void* curview); /* in: Consistent read view to be closed */
/***********************************************************************
Set the given consistent cursor view to a transaction which is created
if the corresponding MySQL thread still lacks one. If the given
consistent cursor view is NULL global read view of a transaction is
restored to a transaction read view. */
void
innobase_set_cursor_view(
/*=====================*/
void* curview); /* in: Consistent read view to be set */
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