mariadb/sql/examples/ha_archive.h

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/* Copyright (C) 2003 MySQL 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 */
#ifdef __GNUC__
#pragma interface /* gcc class implementation */
#endif
#include <zlib.h>
/*
Please read ha_archive.cc first. If you are looking for more general
answers on how storage engines work, look at ha_example.cc and
ha_example.h.
*/
typedef struct st_archive_share {
char *table_name;
char data_file_name[FN_REFLEN];
uint table_name_length,use_count;
pthread_mutex_t mutex;
THR_LOCK lock;
gzFile archive_write; /* Archive file we are working with */
bool dirty; /* Flag for if a flush should occur */
} ARCHIVE_SHARE;
/*
Version for file format.
1 - Initial Version
*/
#define ARCHIVE_VERSION 1
class ha_archive: public handler
{
THR_LOCK_DATA lock; /* MySQL lock */
ARCHIVE_SHARE *share; /* Shared lock info */
gzFile archive; /* Archive file we are working with */
z_off_t current_position; /* The position of the row we just read */
byte byte_buffer[IO_SIZE]; /* Initial buffer for our string */
String buffer; /* Buffer used for blob storage */
unsigned int version; /* Used for recording version */
public:
ha_archive(TABLE *table): handler(table)
{
/* Set our original buffer from pre-allocated memory */
buffer.set(byte_buffer, IO_SIZE, system_charset_info);
/* The size of the offset value we will use for position() */
ref_length = sizeof(z_off_t);
}
~ha_archive()
{
}
const char *table_type() const { return "ARCHIVE"; }
const char *index_type(uint inx) { return "NONE"; }
const char **bas_ext() const;
ulong table_flags() const
{
return (HA_REC_NOT_IN_SEQ | HA_NOT_EXACT_COUNT | HA_NO_AUTO_INCREMENT |
HA_FILE_BASED);
}
New handler::index_flags() definition to make it easy to check the full used key and a specific key part. Added key part to optimize_range() to fix problems when using fields in key parts. sql/examples/ha_archive.h: New handler::index_flags() definition sql/examples/ha_example.h: New handler::index_flags() definition sql/field.cc: New optimize_range() definition sql/field.h: New optimize_range() definition sql/ha_berkeley.cc: New handler::index_flags() definition sql/ha_berkeley.h: New handler::index_flags() definition sql/ha_heap.h: New handler::index_flags() definition sql/ha_innodb.h: New handler::index_flags() definition sql/ha_isam.h: New handler::index_flags() definition sql/ha_isammrg.h: New handler::index_flags() definition sql/ha_myisam.h: New handler::index_flags() definition sql/ha_myisammrg.h: New handler::index_flags() definition sql/ha_ndbcluster.cc: New handler::index_flags() definition sql/ha_ndbcluster.h: New handler::index_flags() definition sql/handler.h: New handler::index_flags() definition sql/log.cc: Fixed compiler warnings sql/log_event.cc: Fixed compiler warnings (and renamed short variable name) sql/opt_range.cc: New handler::index_flags() definition sql/opt_sum.cc: New handler::index_flags() definition sql/set_var.cc: Removed compiler warnings sql/sql_db.cc: Removed compiler warnings sql/sql_select.cc: New handler::index_flags() definition sql/sql_show.cc: Removed compiler warnings sql/sql_update.cc: Removed compiler warnings sql/table.cc: New handler::index_flags() definition
2004-07-08 14:45:25 +02:00
ulong index_flags(uint idx, uint part, bool all_parts) const
{
return 0;
}
/*
Have to put something here, there is no real limit as far as
archive is concerned.
*/
uint max_supported_record_length() const { return UINT_MAX; }
/*
Called in test_quick_select to determine if indexes should be used.
*/
virtual double scan_time() { return (double) (records) / 20.0+10; }
/* The next method will never be called */
Changed %lx -> 0x%lx (for easier comparison of debug files) Cosmetic cleanups Don't call 'delete_elements' on copy_funcs as this causes elements to be freed twice mysys/hash.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/list.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/mf_iocache.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/mf_keycache.c: Changed %lx -> 0x%lx (for easier comparison of debug files) Changed debug messages to be more consistent with other mysys files. mysys/mf_keycaches.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_alloc.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_fopen.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_fstream.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_getwd.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_lib.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_lwrite.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_malloc.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_pread.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_read.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_realloc.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_write.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/safemalloc.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/thr_alarm.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/thr_lock.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/thr_mutex.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/tree.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/typelib.c: Changed %lx -> 0x%lx (for easier comparison of debug files) sql/examples/ha_archive.cc: Changed to return error number for some functions (instead of -1) Updated function comments & some other minor cleanups Ensure that free_share() and gzclose() are always called Use 'TRUE' and 'FALSE' instead of 'true' and 'false' Removed some compiler warnings sql/examples/ha_archive.h: Fixed to use new prototypes for records_in_range sql/sql_select.cc: Don't call 'delete_elements' on copy_funcs
2004-08-23 12:46:51 +02:00
virtual double read_time(uint index, uint ranges, ha_rows rows)
{ return (double) rows / 20.0+1; }
int open(const char *name, int mode, uint test_if_locked);
int close(void);
int write_row(byte * buf);
int update_row(const byte * old_data, byte * new_data);
int delete_row(const byte * buf);
int index_read(byte * buf, const byte * key,
uint key_len, enum ha_rkey_function find_flag);
int index_read_idx(byte * buf, uint idx, const byte * key,
uint key_len, enum ha_rkey_function find_flag);
int index_next(byte * buf);
int index_prev(byte * buf);
int index_first(byte * buf);
int index_last(byte * buf);
int rnd_init(bool scan=1);
int rnd_next(byte *buf);
int rnd_pos(byte * buf, byte *pos);
int get_row(byte *buf);
void position(const byte *record);
void info(uint);
int extra(enum ha_extra_function operation);
int reset(void);
int external_lock(THD *thd, int lock_type);
Changed %lx -> 0x%lx (for easier comparison of debug files) Cosmetic cleanups Don't call 'delete_elements' on copy_funcs as this causes elements to be freed twice mysys/hash.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/list.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/mf_iocache.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/mf_keycache.c: Changed %lx -> 0x%lx (for easier comparison of debug files) Changed debug messages to be more consistent with other mysys files. mysys/mf_keycaches.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_alloc.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_fopen.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_fstream.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_getwd.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_lib.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_lwrite.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_malloc.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_pread.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_read.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_realloc.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/my_write.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/safemalloc.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/thr_alarm.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/thr_lock.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/thr_mutex.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/tree.c: Changed %lx -> 0x%lx (for easier comparison of debug files) mysys/typelib.c: Changed %lx -> 0x%lx (for easier comparison of debug files) sql/examples/ha_archive.cc: Changed to return error number for some functions (instead of -1) Updated function comments & some other minor cleanups Ensure that free_share() and gzclose() are always called Use 'TRUE' and 'FALSE' instead of 'true' and 'false' Removed some compiler warnings sql/examples/ha_archive.h: Fixed to use new prototypes for records_in_range sql/sql_select.cc: Don't call 'delete_elements' on copy_funcs
2004-08-23 12:46:51 +02:00
ha_rows records_in_range(uint inx, key_range *min_key, key_range *max_key);
int create(const char *name, TABLE *form, HA_CREATE_INFO *create_info);
THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to,
enum thr_lock_type lock_type);
};