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tomas@poseidon.ndb.mysql.com
2005-10-06 10:54:07 +02:00
parent 418808ba9a 3af12c4776
commit 620b7bafb0
449 changed files with 13079 additions and 6107 deletions
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69
sql/handler.h
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@ -107,6 +107,13 @@
#define HA_ONLINE_ADD_EMPTY_PARTITION 1
#define HA_ONLINE_DROP_PARTITION 2
/*
Index scan will not return records in rowid order. Not guaranteed to be
set for unordered (e.g. HASH) indexes.
*/
#define HA_KEY_SCAN_NOT_ROR 128
/* operations for disable/enable indexes */
#define HA_KEY_SWITCH_NONUNIQ 0
#define HA_KEY_SWITCH_ALL 1
@ -187,13 +194,6 @@ enum db_type
DB_TYPE_DEFAULT // Must be last
};
struct show_table_type_st {
const char *type;
SHOW_COMP_OPTION *value;
const char *comment;
enum db_type db_type;
};
enum row_type { ROW_TYPE_NOT_USED=-1, ROW_TYPE_DEFAULT, ROW_TYPE_FIXED,
ROW_TYPE_DYNAMIC, ROW_TYPE_COMPRESSED,
ROW_TYPE_REDUNDANT, ROW_TYPE_COMPACT };
@ -241,7 +241,7 @@ struct xid_t {
char data[XIDDATASIZE]; // not \0-terminated !
bool eq(struct xid_t *xid)
{ return !memcmp(this, xid, length()); }
{ return eq(xid->gtrid_length, xid->bqual_length, xid->data); }
bool eq(long g, long b, const char *d)
{ return g == gtrid_length && b == bqual_length && !memcmp(d, data, g+b); }
void set(struct xid_t *xid)
@ -289,6 +289,14 @@ struct xid_t {
return sizeof(formatID)+sizeof(gtrid_length)+sizeof(bqual_length)+
gtrid_length+bqual_length;
}
byte *key()
{
return (byte *)&gtrid_length;
}
uint key_length()
{
return sizeof(gtrid_length)+sizeof(bqual_length)+gtrid_length+bqual_length;
}
};
typedef struct xid_t XID;
@ -317,6 +325,27 @@ typedef struct
storage engine name as it should be printed to a user
*/
const char *name;
/*
Historical marker for if the engine is available of not
*/
SHOW_COMP_OPTION state;
/*
A comment used by SHOW to describe an engine.
*/
const char *comment;
/*
Historical number used for frm file to determine the correct storage engine.
This is going away and new engines will just use "name" for this.
*/
enum db_type db_type;
/*
Method that initizlizes a storage engine
*/
bool (*init)();
/*
each storage engine has it's own memory area (actually a pointer)
in the thd, for storing per-connection information.
@ -376,9 +405,16 @@ typedef struct
uint32 flags; /* global handler flags */
} handlerton;
struct show_table_alias_st {
const char *alias;
const char *type;
};
/* Possible flags of a handlerton */
#define HTON_NO_FLAGS 0
#define HTON_CLOSE_CURSORS_AT_COMMIT 1
#define HTON_NO_FLAGS 0
#define HTON_CLOSE_CURSORS_AT_COMMIT (1 << 0)
#define HTON_ALTER_NOT_SUPPORTED (1 << 1)
#define HTON_CAN_RECREATE (1 << 2)
typedef struct st_thd_trans
{
@ -1121,7 +1157,7 @@ public:
{ return extra(operation); }
virtual int external_lock(THD *thd, int lock_type) { return 0; }
virtual void unlock_row() {}
virtual int start_stmt(THD *thd) {return 0;}
virtual int start_stmt(THD *thd, thr_lock_type lock_type) {return 0;}
/*
This is called to delete all rows in a table
If the handler don't support this, then this function will
@ -1338,10 +1374,10 @@ public:
/* Some extern variables used with handlers */
extern struct show_table_type_st sys_table_types[];
extern handlerton *sys_table_types[];
extern const char *ha_row_type[];
extern TYPELIB tx_isolation_typelib;
extern handlerton *handlertons[MAX_HA];
extern TYPELIB myisam_stats_method_typelib;
extern ulong total_ha, total_ha_2pc;
/* Wrapper functions */
@ -1350,18 +1386,13 @@ extern ulong total_ha, total_ha_2pc;
#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_ARCHIVE_DB && \
T != DB_TYPE_FEDERATED_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);
enum db_type ha_checktype(THD *thd, enum db_type database_type,
bool no_substitute, bool report_error);
bool ha_check_storage_engine_flag(enum db_type db_type, uint32 flag);
/* basic stuff */
int ha_init(void);