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sql/ha_ndbcluster.h:
  Auto merged
sql/item.h:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_func.h:
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sql/mysqld.cc:
  Auto merged
sql/sql_class.h:
  Auto merged
sql/sql_select.cc:
  Auto merged
This commit is contained in:
unknown
2005-02-21 16:13:29 +01:00
parent dffefb3039 448a4fd1f1
commit a2bb52c748
154 changed files with 6093 additions and 4023 deletions
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205
sql/handler.h
View File

@ -93,6 +93,11 @@
#define HA_KEY_SWITCH_NONUNIQ_SAVE 2
#define HA_KEY_SWITCH_ALL_SAVE 3
/*
Note: the following includes binlog and closing 0.
so: innodb+bdb+ndb+binlog+0
*/
#define MAX_HA 6
/*
Bits in index_ddl_flags(KEY *wanted_index)
@ -192,16 +197,12 @@ enum row_type { ROW_TYPE_NOT_USED=-1, ROW_TYPE_DEFAULT, ROW_TYPE_FIXED,
#define HA_CREATE_USED_COMMENT (1L << 16)
#define HA_CREATE_USED_PASSWORD (1L << 17)
typedef struct st_thd_trans {
void *bdb_tid;
void *innobase_tid;
bool innodb_active_trans;
void *ndb_tid;
} THD_TRANS;
typedef ulonglong my_xid;
#define MYSQL_XID_PREFIX "MySQLXid"
#define MYSQL_XID_PREFIX_LEN 8 // must be a multiple of 8
#define MYSQL_XID_OFFSET (MYSQL_XID_PREFIX_LEN+sizeof(server_id))
#define MYSQL_XID_GTRID_LEN (MYSQL_XID_OFFSET+sizeof(my_xid))
#ifndef XIDDATASIZE /* no xa.h included */
/* XXX - may be we should disable xa completely in this case ? */
#define XIDDATASIZE 128
#define MAXGTRIDSIZE 64
#define MAXBQUALSIZE 64
@ -210,22 +211,106 @@ struct xid_t {
long formatID;
long gtrid_length;
long bqual_length;
char data[XIDDATASIZE];
};
char data[XIDDATASIZE]; // not \0-terminated !
bool eq(LEX_STRING *l) { return eq(l->length, 0, l->str); }
bool eq(long g, long b, const char *d)
{ return g == gtrid_length && b == bqual_length && !memcmp(d, data, g+b); }
void set(LEX_STRING *l) { set(l->length, 0, l->str); }
void set(ulonglong l)
{
set(MYSQL_XID_PREFIX_LEN, 0, MYSQL_XID_PREFIX);
*(ulong*)(data+MYSQL_XID_PREFIX_LEN)=server_id;
*(my_xid*)(data+MYSQL_XID_OFFSET)=l;
gtrid_length=MYSQL_XID_GTRID_LEN;
}
void set(long g, long b, const char *d)
{
formatID=1;
gtrid_length= g;
bqual_length= b;
memcpy(data, d, g+b);
}
bool is_null() { return formatID == -1; }
void null() { formatID= -1; }
my_xid quick_get_my_xid()
{
return *(my_xid*)(data+MYSQL_XID_OFFSET);
}
my_xid get_my_xid()
{
return gtrid_length == MYSQL_XID_GTRID_LEN && bqual_length == 0 &&
*(ulong*)(data+MYSQL_XID_PREFIX_LEN) == server_id &&
!memcmp(data, MYSQL_XID_PREFIX, MYSQL_XID_PREFIX_LEN) ?
quick_get_my_xid() : 0;
}
};
typedef struct xid_t XID;
/* for recover() handlerton call */
#define MIN_XID_LIST_SIZE 128
#define MAX_XID_LIST_SIZE (1024*128)
#endif
/*
handlerton is a singleton structure - one instance per storage engine -
to provide access to storage engine functionality that works on
"global" level (unlike handler class that works on per-table basis)
usually handlerton instance is defined statically in ha_xxx.cc as
static handlerton { ... } xxx_hton;
savepoint_*, prepare, recover, and *_by_xid pointers can be 0.
*/
typedef struct
{
byte slot;
/*
each storage engine has it's own memory area (actually a pointer)
in the thd, for storing per-connection information.
It is accessed as
thd->ha_data[xxx_hton.slot]
slot number is initialized by MySQL after xxx_init() is called.
*/
uint slot;
/*
to store per-savepoint data storage engine is provided with an area
of a requested size (0 is ok here).
savepoint_offset must be initialized statically to the size of
the needed memory to store per-savepoint information.
After xxx_init it is changed to be an offset to savepoint storage
area and need not be used by storage engine.
see binlog_hton and binlog_savepoint_set/rollback for an example.
*/
uint savepoint_offset;
/*
handlerton methods:
close_connection is only called if
thd->ha_data[xxx_hton.slot] is non-zero, so even if you don't need
this storage area - set it to something, so that MySQL would know
this storage engine was accessed in this connection
*/
int (*close_connection)(THD *thd);
/*
sv points to an uninitialized storage area of requested size
(see savepoint_offset description)
*/
int (*savepoint_set)(THD *thd, void *sv);
/*
sv points to a storage area, that was earlier passed
to the savepoint_set call
*/
int (*savepoint_rollback)(THD *thd, void *sv);
int (*savepoint_release)(THD *thd, void *sv);
/*
'all' is true if it's a real commit, that makes persistent changes
'all' is false if it's not in fact a commit but an end of the
statement that is part of the transaction.
NOTE 'all' is also false in auto-commit mode where 'end of statement'
and 'real commit' mean the same event.
*/
int (*commit)(THD *thd, bool all);
int (*rollback)(THD *thd, bool all);
int (*prepare)(THD *thd, bool all);
@ -234,6 +319,16 @@ typedef struct
int (*rollback_by_xid)(XID *xid);
} handlerton;
typedef struct st_thd_trans
{
/* number of entries in the ht[] */
uint nht;
/* true is not all entries in the ht[] support 2pc */
bool no_2pc;
/* storage engines that registered themselves for this transaction */
handlerton *ht[MAX_HA];
} THD_TRANS;
enum enum_tx_isolation { ISO_READ_UNCOMMITTED, ISO_READ_COMMITTED,
ISO_REPEATABLE_READ, ISO_SERIALIZABLE};
@ -268,6 +363,9 @@ typedef struct st_table TABLE;
struct st_foreign_key_info;
typedef struct st_foreign_key_info FOREIGN_KEY_INFO;
typedef struct st_savepoint SAVEPOINT;
extern ulong savepoint_alloc_size;
/* Forward declaration for condition pushdown to storage engine */
typedef struct Item COND;
@ -651,57 +749,72 @@ public:
extern struct show_table_type_st sys_table_types[];
extern const char *ha_row_type[];
extern TYPELIB tx_isolation_typelib;
extern handlerton *handlertons[MAX_HA];
extern ulong total_ha, total_ha_2pc;
/* Wrapper functions */
#define ha_commit_stmt(thd) (ha_commit_trans((thd), &((thd)->transaction.stmt)))
#define ha_rollback_stmt(thd) (ha_rollback_trans((thd), &((thd)->transaction.stmt)))
#define ha_commit(thd) (ha_commit_trans((thd), &((thd)->transaction.all)))
#define ha_rollback(thd) (ha_rollback_trans((thd), &((thd)->transaction.all)))
#define ha_commit_stmt(thd) (ha_commit_trans((thd), FALSE))
#define ha_rollback_stmt(thd) (ha_rollback_trans((thd), FALSE))
#define ha_commit(thd) (ha_commit_trans((thd), TRUE))
#define ha_rollback(thd) (ha_rollback_trans((thd), TRUE))
#define ha_supports_generate(T) (T != DB_TYPE_INNODB && \
T != DB_TYPE_BERKELEY_DB && \
T != DB_TYPE_NDBCLUSTER)
/* lookups */
enum db_type ha_resolve_by_name(const char *name, uint namelen);
const char *ha_get_storage_engine(enum db_type db_type);
handler *get_new_handler(TABLE *table, enum db_type db_type);
my_off_t ha_get_ptr(byte *ptr, uint pack_length);
void ha_store_ptr(byte *buff, uint pack_length, my_off_t pos);
int ha_init(void);
int ha_panic(enum ha_panic_function flag);
void ha_close_connection(THD* thd);
enum db_type ha_checktype(enum db_type database_type);
/* basic stuff */
int ha_init(void);
TYPELIB *ha_known_exts(void);
int ha_panic(enum ha_panic_function flag);
int ha_update_statistics();
void ha_close_connection(THD* thd);
bool ha_flush_logs(void);
void ha_drop_database(char* path);
int ha_create_table(const char *name, HA_CREATE_INFO *create_info,
bool update_create_info);
int ha_delete_table(enum db_type db_type, const char *path);
/* discovery */
int ha_create_table_from_engine(THD* thd, const char *db, const char *name,
bool create_if_found);
int ha_delete_table(enum db_type db_type, const char *path);
void ha_drop_database(char* path);
int ha_discover(THD* thd, const char* dbname, const char* name,
const void** frmblob, uint* frmlen);
int ha_find_files(THD *thd,const char *db,const char *path,
const char *wild, bool dir,List<char>* files);
int ha_table_exists(THD* thd, const char* db, const char* name);
/* key cache */
int ha_init_key_cache(const char *name, KEY_CACHE *key_cache);
int ha_resize_key_cache(KEY_CACHE *key_cache);
int ha_change_key_cache_param(KEY_CACHE *key_cache);
int ha_change_key_cache(KEY_CACHE *old_key_cache, KEY_CACHE *new_key_cache);
int ha_end_key_cache(KEY_CACHE *key_cache);
int ha_start_stmt(THD *thd);
int ha_report_binlog_offset_and_commit(THD *thd, char *log_file_name,
my_off_t end_offset);
int ha_commit_complete(THD *thd);
/* weird stuff */
int ha_release_temporary_latches(THD *thd);
int ha_update_statistics();
int ha_commit_trans(THD *thd, THD_TRANS *trans);
int ha_rollback_trans(THD *thd, THD_TRANS *trans);
int ha_rollback_to_savepoint(THD *thd, char *savepoint_name);
int ha_savepoint(THD *thd, char *savepoint_name);
int ha_release_savepoint_name(THD *thd, char *savepoint_name);
int ha_autocommit_or_rollback(THD *thd, int error);
void ha_set_spin_retries(uint retries);
bool ha_flush_logs(void);
int ha_enable_transaction(THD *thd, bool on);
int ha_change_key_cache(KEY_CACHE *old_key_cache,
KEY_CACHE *new_key_cache);
int ha_discover(THD* thd, const char* dbname, const char* name,
const void** frmblob, uint* frmlen);
int ha_find_files(THD *thd,const char *db,const char *path,
const char *wild, bool dir,List<char>* files);
int ha_table_exists(THD* thd, const char* db, const char* name);
TYPELIB *ha_known_exts(void);
/* transactions: interface to handlerton functions */
int ha_start_consistent_snapshot(THD *thd);
int ha_commit_or_rollback_by_xid(LEX_STRING *ident, bool commit);
int ha_commit_one_phase(THD *thd, bool all);
int ha_rollback_trans(THD *thd, bool all);
int ha_prepare(THD *thd);
int ha_recover(HASH *commit_list);
/* transactions: these functions never call handlerton functions directly */
int ha_commit_trans(THD *thd, bool all);
int ha_autocommit_or_rollback(THD *thd, int error);
int ha_enable_transaction(THD *thd, bool on);
void trans_register_ha(THD *thd, bool all, handlerton *ht);
/* savepoints */
int ha_rollback_to_savepoint(THD *thd, SAVEPOINT *sv);
int ha_savepoint(THD *thd, SAVEPOINT *sv);
int ha_release_savepoint(THD *thd, SAVEPOINT *sv);