/* 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 USE_PRAGMA_INTERFACE #pragma interface /* gcc class implementation */ #endif #include <zlib.h> #include "../storage/archive/azlib.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; File meta_file; /* Meta file we use */ azio_stream archive_write; /* Archive file we are working with */ bool dirty; /* Flag for if a flush should occur */ bool crashed; /* Meta file is crashed */ ha_rows rows_recorded; /* Number of rows in tables */ ulonglong auto_increment_value; } ARCHIVE_SHARE; /* Version for file format. 1 - Initial Version */ #define ARCHIVE_VERSION 2 class ha_archive: public handler { THR_LOCK_DATA lock; /* MySQL lock */ ARCHIVE_SHARE *share; /* Shared lock info */ azio_stream archive; /* Archive file we are working with */ my_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 */ ha_rows scan_rows; /* Number of rows left in scan */ bool delayed_insert; /* If the insert is delayed */ bool bulk_insert; /* If we are performing a bulk insert */ const byte *current_key; uint current_key_len; uint current_k_offset; public: ha_archive(TABLE_SHARE *table_arg); ~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_FILE_BASED | HA_CAN_INSERT_DELAYED | HA_CAN_GEOMETRY); } ulong index_flags(uint idx, uint part, bool all_parts) const { return HA_ONLY_WHOLE_INDEX; } ulonglong get_auto_increment(); uint max_supported_keys() const { return 1; } uint max_supported_key_length() const { return sizeof(ulonglong); } uint max_supported_key_part_length() const { return sizeof(ulonglong); } int index_init(uint keynr, bool sorted); virtual int index_read(byte * buf, const byte * key, uint key_len, enum ha_rkey_function find_flag); virtual int index_read_idx(byte * buf, uint index, const byte * key, uint key_len, enum ha_rkey_function find_flag); int index_next(byte * buf); int open(const char *name, int mode, uint test_if_locked); int close(void); int write_row(byte * buf); int real_write_row(byte *buf, azio_stream *writer); int delete_all_rows(); int rnd_init(bool scan=1); int rnd_next(byte *buf); int rnd_pos(byte * buf, byte *pos); int get_row(azio_stream *file_to_read, byte *buf); int read_meta_file(File meta_file, ha_rows *rows, ulonglong *auto_increment); int write_meta_file(File meta_file, ha_rows rows, ulonglong auto_increment, bool dirty); ARCHIVE_SHARE *get_share(const char *table_name, TABLE *table); int free_share(ARCHIVE_SHARE *share); bool auto_repair() const { return 1; } // For the moment we just do this int read_data_header(azio_stream *file_to_read); int write_data_header(azio_stream *file_to_write); void position(const byte *record); void info(uint); void update_create_info(HA_CREATE_INFO *create_info); int create(const char *name, TABLE *form, HA_CREATE_INFO *create_info); int optimize(THD* thd, HA_CHECK_OPT* check_opt); int repair(THD* thd, HA_CHECK_OPT* check_opt); void start_bulk_insert(ha_rows rows); int end_bulk_insert(); enum row_type get_row_type() const { return ROW_TYPE_COMPRESSED; } THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to, enum thr_lock_type lock_type); bool is_crashed() const; int check(THD* thd, HA_CHECK_OPT* check_opt); bool check_and_repair(THD *thd); }; bool archive_db_init(void); int archive_db_end(ha_panic_function type);