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8b81ac649fc71d680266e7b0f294ebe78cf3886c
mariadb/sql/handler.h
unknown 7786126bef a fix for a crashing bug when attempting to create InnoDB table 
with GEOMETRY field type.
2003-04-08 20:39:50 +03:00

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15 KiB
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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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; either version 2 of the License, or
(at your option) any later version.
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 */
/* Definitions for parameters to do with handler-routines */
#ifdef __GNUC__
#pragma interface /* gcc class implementation */
#endif
#include <ft_global.h>
#ifndef NO_HASH
#define NO_HASH /* Not yet implemented */
#endif
#if defined(HAVE_BERKELEY_DB) || defined(HAVE_INNOBASE_DB)
#define USING_TRANSACTIONS
#endif
// the following is for checking tables
#define HA_ADMIN_ALREADY_DONE 1
#define HA_ADMIN_OK 0
#define HA_ADMIN_NOT_IMPLEMENTED -1
#define HA_ADMIN_FAILED -2
#define HA_ADMIN_CORRUPT -3
#define HA_ADMIN_INTERNAL_ERROR -4
#define HA_ADMIN_INVALID -5
/* Bits in table_flags() to show what database can do */
#define HA_READ_RND_SAME 1 /* Read RND-record to KEY-record
(To update with RND-read) */
#define HA_KEYPOS_TO_RNDPOS 2 /* ha_info gives pos to record */
#define HA_TABLE_SCAN_ON_INDEX 4 /* No separate data/index file */
#define HA_REC_NOT_IN_SEQ 8 /* ha_info don't return recnumber;
It returns a position to ha_r_rnd */
#define HA_HAS_GEOMETRY 16
#define HA_NO_INDEX 32 /* No index needed for next/prev */
#define HA_KEY_READ_WRONG_STR 64 /* keyread returns converted strings */
#define HA_NULL_KEY 128 /* One can have keys with NULL */
#define HA_DUPP_POS 256 /* ha_position() gives dupp row */
#define HA_NO_BLOBS 512 /* Doesn't support blobs */
#define HA_BLOB_KEY (HA_NO_BLOBS*2) /* key on blob */
#define HA_AUTO_PART_KEY (HA_BLOB_KEY*2)
#define HA_REQUIRE_PRIMARY_KEY (HA_AUTO_PART_KEY*2)
#define HA_NOT_EXACT_COUNT (HA_REQUIRE_PRIMARY_KEY*2)
#define HA_NO_WRITE_DELAYED (HA_NOT_EXACT_COUNT*2)
#define HA_PRIMARY_KEY_IN_READ_INDEX (HA_NO_WRITE_DELAYED*2)
#define HA_DROP_BEFORE_CREATE (HA_PRIMARY_KEY_IN_READ_INDEX*2)
#define HA_NOT_READ_AFTER_KEY (HA_DROP_BEFORE_CREATE*2)
#define HA_NOT_DELETE_WITH_CACHE (HA_NOT_READ_AFTER_KEY*2)
#define HA_NO_TEMP_TABLES (HA_NOT_DELETE_WITH_CACHE*2)
#define HA_NO_PREFIX_CHAR_KEYS (HA_NO_TEMP_TABLES*2)
#define HA_CAN_FULLTEXT (HA_NO_PREFIX_CHAR_KEYS*2)
#define HA_CAN_SQL_HANDLER (HA_CAN_FULLTEXT*2)
#define HA_NO_AUTO_INCREMENT (HA_CAN_SQL_HANDLER*2)
/*
Next record gives next record according last record read (even
if database is updated after read). Not used at this point.
*/
#define HA_LASTKEY_ORDER (HA_NO_AUTO_INCREMENT*2)
/* bits in index_flags(index_number) for what you can do with index */
#define HA_WRONG_ASCII_ORDER 1 /* Can't use sorting through key */
#define HA_READ_NEXT 2 /* Read next record with same key */
#define HA_READ_PREV 4 /* Read prev. record with same key */
#define HA_READ_ORDER 8 /* Read through record-keys in order */
#define HA_ONLY_WHOLE_INDEX 16 /* Can't use part key searches */
#define HA_NOT_READ_PREFIX_LAST 32 /* No support for index_read_last() */
#define HA_KEY_READ_ONLY 64 /* Support HA_EXTRA_KEYREAD */
/*
Parameters for open() (in register form->filestat)
HA_GET_INFO does an implicit HA_ABORT_IF_LOCKED
*/
#define HA_OPEN_KEYFILE 1
#define HA_OPEN_RNDFILE 2
#define HA_GET_INDEX 4
#define HA_GET_INFO 8 /* do a ha_info() after open */
#define HA_READ_ONLY 16 /* File opened as readonly */
/* Try readonly if can't open with read and write */
#define HA_TRY_READ_ONLY 32
#define HA_WAIT_IF_LOCKED 64 /* Wait if locked on open */
#define HA_ABORT_IF_LOCKED 128 /* skip if locked on open.*/
#define HA_BLOCK_LOCK 256 /* unlock when reading some records */
#define HA_OPEN_TEMPORARY 512
/* Errors on write which is recoverable (Key exist) */
#define HA_WRITE_SKIP 121 /* Duplicate key on write */
#define HA_READ_CHECK 123 /* Update with is recoverable */
#define HA_CANT_DO_THAT 131 /* Databasehandler can't do it */
/* Some key definitions */
#define HA_KEY_NULL_LENGTH 1
#define HA_KEY_BLOB_LENGTH 2
#define HA_LEX_CREATE_TMP_TABLE 1
#define HA_LEX_CREATE_IF_NOT_EXISTS 2
#define HA_OPTION_NO_CHECKSUM (1L << 17)
#define HA_OPTION_NO_DELAY_KEY_WRITE (1L << 18)
#define HA_MAX_REC_LENGTH 65535
enum db_type { DB_TYPE_UNKNOWN=0,DB_TYPE_DIAB_ISAM=1,
DB_TYPE_HASH,DB_TYPE_MISAM,DB_TYPE_PISAM,
DB_TYPE_RMS_ISAM, DB_TYPE_HEAP, DB_TYPE_ISAM,
DB_TYPE_MRG_ISAM, DB_TYPE_MYISAM, DB_TYPE_MRG_MYISAM,
DB_TYPE_BERKELEY_DB, DB_TYPE_INNODB, DB_TYPE_GEMINI,
DB_TYPE_DEFAULT };
enum row_type { ROW_TYPE_NOT_USED=-1, ROW_TYPE_DEFAULT, ROW_TYPE_FIXED,
ROW_TYPE_DYNAMIC, ROW_TYPE_COMPRESSED};
/* struct to hold information about the table that should be created */
/* Bits in used_fields */
#define HA_CREATE_USED_AUTO 1
#define HA_CREATE_USED_RAID 2
#define HA_CREATE_USED_UNION 4
#define HA_CREATE_USED_INSERT_METHOD 8
#define HA_CREATE_USED_MIN_ROWS 16
#define HA_CREATE_USED_MAX_ROWS 32
#define HA_CREATE_USED_AVG_ROW_LENGTH 64
#define HA_CREATE_USED_PACK_KEYS 128
#define HA_CREATE_USED_CHARSET 256
typedef struct st_thd_trans {
void *bdb_tid;
void *innobase_tid;
bool innodb_active_trans;
} THD_TRANS;
enum enum_tx_isolation { ISO_READ_UNCOMMITTED, ISO_READ_COMMITTED,
ISO_REPEATABLE_READ, ISO_SERIALIZABLE};
typedef struct st_ha_create_information
{
CHARSET_INFO *table_charset;
char *comment,*password;
char *data_file_name, *index_file_name;
ulonglong max_rows,min_rows;
ulonglong auto_increment_value;
ulong table_options;
ulong avg_row_length;
ulong raid_chunksize;
ulong used_fields;
SQL_LIST merge_list;
enum db_type db_type;
enum row_type row_type;
uint options; /* OR of HA_CREATE_ options */
uint raid_type,raid_chunks;
uint merge_insert_method;
bool if_not_exists;
} HA_CREATE_INFO;
/* The handler for a table type. Will be included in the TABLE structure */
struct st_table;
typedef struct st_table TABLE;
typedef struct st_ha_check_opt
{
ulong sort_buffer_size;
uint flags; /* isam layer flags (e.g. for myisamchk) */
uint sql_flags; /* sql layer flags - for something myisamchk cannot do */
void init();
} HA_CHECK_OPT;
class handler :public Sql_alloc
{
protected:
struct st_table *table; /* The table definition */
uint active_index;
public:
byte *ref; /* Pointer to current row */
byte *dupp_ref; /* Pointer to dupp row */
uint ref_length; /* Length of ref (1-8) */
uint block_size; /* index block size */
ha_rows records; /* Records i datafilen */
ha_rows deleted; /* Deleted records */
ulonglong data_file_length; /* Length off data file */
ulonglong max_data_file_length; /* Length off data file */
ulonglong index_file_length;
ulonglong max_index_file_length;
ulonglong delete_length; /* Free bytes */
ulonglong auto_increment_value;
uint raid_type,raid_chunks;
ulong raid_chunksize;
uint errkey; /* Last dup key */
uint sortkey, key_used_on_scan;
time_t create_time; /* When table was created */
time_t check_time;
time_t update_time;
ulong mean_rec_length; /* physical reclength */
FT_INFO *ft_handler;
bool auto_increment_column_changed;
handler(TABLE *table_arg) : table(table_arg),active_index(MAX_REF_PARTS),
ref(0),ref_length(sizeof(my_off_t)), block_size(0),records(0),deleted(0),
data_file_length(0), max_data_file_length(0), index_file_length(0),
delete_length(0), auto_increment_value(0), raid_type(0),
key_used_on_scan(MAX_KEY),
create_time(0), check_time(0), update_time(0), mean_rec_length(0),
ft_handler(0)
{}
virtual ~handler(void) {}
int ha_open(const char *name, int mode, int test_if_locked);
void update_timestamp(byte *record);
void update_auto_increment();
virtual void print_error(int error, myf errflag);
uint get_dup_key(int error);
void change_table_ptr(TABLE *table_arg) { table=table_arg; }
virtual double scan_time()
{ return ulonglong2double(data_file_length) / IO_SIZE + 1; }
virtual double read_time(ha_rows rows) { return rows2double(rows); }
virtual bool fast_key_read() { return 0;}
virtual key_map keys_to_use_for_scanning() { return 0; }
virtual bool has_transactions(){ return 0;}
virtual uint extra_rec_buf_length() { return 0; }
virtual ha_rows estimate_number_of_rows() { return records+EXTRA_RECORDS; }
virtual const char *index_type(uint key_number) { return "";}
virtual int index_init(uint idx) { active_index=idx; return 0;}
virtual int index_end() {return 0; }
uint get_index(void) const { return active_index; }
virtual int open(const char *name, int mode, uint test_if_locked)=0;
virtual void initialize(void) {}
virtual int close(void)=0;
virtual int write_row(byte * buf)=0;
virtual int update_row(const byte * old_data, byte * new_data)=0;
virtual int delete_row(const byte * buf)=0;
virtual int index_read(byte * buf, const byte * key,
uint key_len, enum ha_rkey_function find_flag)=0;
virtual int index_read_idx(byte * buf, uint index, const byte * key,
uint key_len, enum ha_rkey_function find_flag)=0;
virtual int index_next(byte * buf)=0;
virtual int index_prev(byte * buf)=0;
virtual int index_first(byte * buf)=0;
virtual int index_last(byte * buf)=0;
virtual int index_next_same(byte *buf, const byte *key, uint keylen);
virtual int index_read_last(byte * buf, const byte * key, uint key_len)
{
return (my_errno=HA_ERR_WRONG_COMMAND);
}
virtual int ft_init()
{ return -1; }
virtual FT_INFO *ft_init_ext(uint mode,uint inx,const byte *key, uint keylen,
bool presort)
{ return NULL; }
virtual int ft_read(byte *buf) { return -1; }
virtual int rnd_init(bool scan=1)=0;
virtual int rnd_end() { return 0; }
virtual int rnd_next(byte *buf)=0;
virtual int rnd_pos(byte * buf, byte *pos)=0;
virtual int read_first_row(byte *buf, uint primary_key);
virtual int restart_rnd_next(byte *buf, byte *pos);
virtual ha_rows records_in_range(int inx,
const byte *start_key,uint start_key_len,
enum ha_rkey_function start_search_flag,
const byte *end_key,uint end_key_len,
enum ha_rkey_function end_search_flag)
{ return (ha_rows) 10; }
virtual void position(const byte *record)=0;
virtual my_off_t row_position() { return HA_OFFSET_ERROR; }
virtual void info(uint)=0;
virtual int extra(enum ha_extra_function operation)=0;
virtual int extra_opt(enum ha_extra_function operation, ulong cache_size)
{
return extra(operation);
}
virtual int reset()=0;
virtual int external_lock(THD *thd, int lock_type)=0;
virtual void unlock_row() {}
virtual int start_stmt(THD *thd) {return 0;}
virtual int delete_all_rows();
virtual longlong get_auto_increment();
virtual void update_create_info(HA_CREATE_INFO *create_info) {}
virtual int check(THD* thd, HA_CHECK_OPT* check_opt );
virtual int repair(THD* thd, HA_CHECK_OPT* check_opt);
virtual bool check_and_repair(THD *thd) {return 1;}
virtual int optimize(THD* thd,HA_CHECK_OPT* check_opt);
virtual int analyze(THD* thd, HA_CHECK_OPT* check_opt);
virtual int backup(THD* thd, HA_CHECK_OPT* check_opt);
/*
restore assumes .frm file must exist, and that generate_table() has been
called; It will just copy the data file and run repair.
*/
virtual int restore(THD* thd, HA_CHECK_OPT* check_opt);
virtual int dump(THD* thd, int fd = -1) { return ER_DUMP_NOT_IMPLEMENTED; }
virtual void deactivate_non_unique_index(ha_rows rows) {}
virtual bool activate_all_index(THD *thd) {return 0;}
// not implemented by default
virtual int net_read_dump(NET* net)
{ return ER_DUMP_NOT_IMPLEMENTED; }
virtual char *update_table_comment(const char * comment)
{ return (char*) comment;}
virtual void append_create_info(String *packet) {}
virtual char* get_foreign_key_create_info()
{ return(NULL);} /* gets foreign key create string from InnoDB */
virtual void init_table_handle_for_HANDLER()
{ return; } /* prepare InnoDB for HANDLER */
virtual void free_foreign_key_create_info(char* str) {}
/* The following can be called without an open handler */
virtual const char *table_type() const =0;
virtual const char **bas_ext() const =0;
virtual ulong table_flags(void) const =0;
virtual ulong index_flags(uint idx) const
{
return (HA_READ_NEXT | HA_READ_PREV | HA_READ_ORDER | HA_KEY_READ_ONLY);
}
virtual uint max_record_length() const =0;
virtual uint max_keys() const =0;
virtual uint max_key_parts() const =0;
virtual uint max_key_length()const =0;
virtual uint max_key_part_length() { return 255; }
virtual uint min_record_length(uint options) const { return 1; }
virtual bool low_byte_first() const { return 1; }
virtual bool is_crashed() const { return 0; }
virtual bool auto_repair() const { return 0; }
virtual int rename_table(const char *from, const char *to);
virtual int delete_table(const char *name);
virtual int create(const char *name, TABLE *form, HA_CREATE_INFO *info)=0;
virtual uint lock_count(void) const { return 1; }
virtual THR_LOCK_DATA **store_lock(THD *thd,
THR_LOCK_DATA **to,
enum thr_lock_type lock_type)=0;
};
/* Some extern variables used with handlers */
extern const char *ha_row_type[];
extern TYPELIB ha_table_typelib, tx_isolation_typelib;
/* 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_supports_generate(T) (T != DB_TYPE_INNODB)
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);
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);
void ha_drop_database(char* path);
void ha_key_cache(void);
void ha_resize_key_cache(void);
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_release_temporary_latches(THD *thd);
int ha_commit_trans(THD *thd, THD_TRANS *trans);
int ha_rollback_trans(THD *thd, THD_TRANS *trans);
int ha_autocommit_or_rollback(THD *thd, int error);
void ha_set_spin_retries(uint retries);
bool ha_flush_logs(void);
int ha_recovery_logging(THD *thd, bool on);
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