/* 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 */ #ifdef __GNUC__ #pragma implementation // gcc: Class implementation #endif #include "mysql_priv.h" #include #include #include "ha_myisam.h" #include #ifndef MASTER #include "../srclib/myisam/myisamdef.h" #else #include "../myisam/myisamdef.h" #include "../myisam/rt_index.h" #endif ulong myisam_recover_options= HA_RECOVER_NONE; /* bits in myisam_recover_options */ const char *myisam_recover_names[] = { "DEFAULT", "BACKUP", "FORCE", "QUICK", NullS}; TYPELIB myisam_recover_typelib= {array_elements(myisam_recover_names)-1,"", myisam_recover_names}; /***************************************************************************** ** MyISAM tables *****************************************************************************/ // collect errors printed by mi_check routines static void mi_check_print_msg(MI_CHECK *param, const char* msg_type, const char *fmt, va_list args) { THD* thd = (THD*)param->thd; Protocol *protocol= thd->protocol; uint length, msg_length; char msgbuf[MI_MAX_MSG_BUF]; char name[NAME_LEN*2+2]; msg_length= my_vsnprintf(msgbuf, sizeof(msgbuf), fmt, args); msgbuf[sizeof(msgbuf) - 1] = 0; // healthy paranoia DBUG_PRINT(msg_type,("message: %s",msgbuf)); #ifndef EMBEDDED_LIBRARY if (thd->net.vio == 0) { sql_print_error(msgbuf); return; } #endif if (param->testflag & (T_CREATE_MISSING_KEYS | T_SAFE_REPAIR | T_AUTO_REPAIR)) { my_message(ER_NOT_KEYFILE,msgbuf,MYF(MY_WME)); return; } length=(uint) (strxmov(name, param->db_name,".",param->table_name,NullS) - name); protocol->prepare_for_resend(); protocol->store(name, length, system_charset_info); protocol->store(param->op_name, system_charset_info); protocol->store(msg_type, system_charset_info); protocol->store(msgbuf, msg_length, system_charset_info); if (protocol->write()) sql_print_error("Failed on my_net_write, writing to stderr instead: %s\n", msgbuf); return; } extern "C" { volatile bool *killed_ptr(MI_CHECK *param) { return &(((THD *)(param->thd))->killed); } void mi_check_print_error(MI_CHECK *param, const char *fmt,...) { param->error_printed|=1; param->out_flag|= O_DATA_LOST; va_list args; va_start(args, fmt); mi_check_print_msg(param, "error", fmt, args); va_end(args); } void mi_check_print_info(MI_CHECK *param, const char *fmt,...) { va_list args; va_start(args, fmt); mi_check_print_msg(param, "info", fmt, args); va_end(args); } void mi_check_print_warning(MI_CHECK *param, const char *fmt,...) { param->warning_printed=1; param->out_flag|= O_DATA_LOST; va_list args; va_start(args, fmt); mi_check_print_msg(param, "warning", fmt, args); va_end(args); } } const char **ha_myisam::bas_ext() const { static const char *ext[]= { ".MYI",".MYD", NullS }; return ext; } const char *ha_myisam::index_type(uint key_number) { return ((table->key_info[key_number].flags & HA_FULLTEXT) ? "FULLTEXT" : (table->key_info[key_number].flags & HA_SPATIAL) ? "SPATIAL" : (table->key_info[key_number].algorithm == HA_KEY_ALG_RTREE) ? "RTREE" : "BTREE"); } #ifdef HAVE_REPLICATION int ha_myisam::net_read_dump(NET* net) { int data_fd = file->dfile; int error = 0; my_seek(data_fd, 0L, MY_SEEK_SET, MYF(MY_WME)); for (;;) { ulong packet_len = my_net_read(net); if (!packet_len) break ; // end of file if (packet_len == packet_error) { sql_print_error("ha_myisam::net_read_dump - read error "); error= -1; goto err; } if (my_write(data_fd, (byte*)net->read_pos, (uint) packet_len, MYF(MY_WME|MY_FNABP))) { error = errno; goto err; } } err: return error; } int ha_myisam::dump(THD* thd, int fd) { MYISAM_SHARE* share = file->s; NET* net = &thd->net; uint blocksize = share->blocksize; my_off_t bytes_to_read = share->state.state.data_file_length; int data_fd = file->dfile; byte * buf = (byte*) my_malloc(blocksize, MYF(MY_WME)); if (!buf) return ENOMEM; int error = 0; my_seek(data_fd, 0L, MY_SEEK_SET, MYF(MY_WME)); for (; bytes_to_read > 0;) { uint bytes = my_read(data_fd, buf, blocksize, MYF(MY_WME)); if (bytes == MY_FILE_ERROR) { error = errno; goto err; } if (fd >= 0) { if (my_write(fd, buf, bytes, MYF(MY_WME | MY_FNABP))) { error = errno ? errno : EPIPE; goto err; } } else { if (my_net_write(net, (char*) buf, bytes)) { error = errno ? errno : EPIPE; goto err; } } bytes_to_read -= bytes; } if (fd < 0) { my_net_write(net, "", 0); net_flush(net); } err: my_free((gptr) buf, MYF(0)); return error; } #endif /* HAVE_REPLICATION */ /* Name is here without an extension */ int ha_myisam::open(const char *name, int mode, uint test_if_locked) { if (!(file=mi_open(name, mode, test_if_locked))) return (my_errno ? my_errno : -1); if (test_if_locked & (HA_OPEN_IGNORE_IF_LOCKED | HA_OPEN_TMP_TABLE)) VOID(mi_extra(file, HA_EXTRA_NO_WAIT_LOCK, 0)); info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST); if (!(test_if_locked & HA_OPEN_WAIT_IF_LOCKED)) VOID(mi_extra(file, HA_EXTRA_WAIT_LOCK, 0)); if (!table->db_record_offset) int_table_flags|=HA_REC_NOT_IN_SEQ; return (0); } int ha_myisam::close(void) { MI_INFO *tmp=file; file=0; return mi_close(tmp); } int ha_myisam::write_row(byte * buf) { statistic_increment(ha_write_count,&LOCK_status); /* If we have a timestamp column, update it to the current time */ if (table->time_stamp) update_timestamp(buf+table->time_stamp-1); /* If we have an auto_increment column and we are writing a changed row or a new row, then update the auto_increment value in the record. */ if (table->next_number_field && buf == table->record[0]) update_auto_increment(); return mi_write(file,buf); } int ha_myisam::check(THD* thd, HA_CHECK_OPT* check_opt) { if (!file) return HA_ADMIN_INTERNAL_ERROR; int error; MI_CHECK param; MYISAM_SHARE* share = file->s; const char *old_proc_info=thd->proc_info; thd->proc_info="Checking table"; myisamchk_init(¶m); param.thd = thd; param.op_name = (char*)"check"; param.db_name = table->table_cache_key; param.table_name = table->table_name; param.testflag = check_opt->flags | T_CHECK | T_SILENT; if (!(table->db_stat & HA_READ_ONLY)) param.testflag|= T_STATISTICS; param.using_global_keycache = 1; if (!mi_is_crashed(file) && (((param.testflag & T_CHECK_ONLY_CHANGED) && !(share->state.changed & (STATE_CHANGED | STATE_CRASHED | STATE_CRASHED_ON_REPAIR)) && share->state.open_count == 0) || ((param.testflag & T_FAST) && (share->state.open_count == (uint) (share->global_changed ? 1 : 0))))) return HA_ADMIN_ALREADY_DONE; error = chk_status(¶m, file); // Not fatal error = chk_size(¶m, file); if (!error) error |= chk_del(¶m, file, param.testflag); if (!error) error = chk_key(¶m, file); if (!error) { if ((!(param.testflag & T_QUICK) && ((share->options & (HA_OPTION_PACK_RECORD | HA_OPTION_COMPRESS_RECORD)) || (param.testflag & (T_EXTEND | T_MEDIUM)))) || mi_is_crashed(file)) { uint old_testflag=param.testflag; param.testflag|=T_MEDIUM; init_io_cache(¶m.read_cache, file->dfile, my_default_record_cache_size, READ_CACHE, share->pack.header_length, 1, MYF(MY_WME)); error |= chk_data_link(¶m, file, param.testflag & T_EXTEND); end_io_cache(&(param.read_cache)); param.testflag=old_testflag; } } if (!error) { if ((share->state.changed & (STATE_CHANGED | STATE_CRASHED_ON_REPAIR | STATE_CRASHED | STATE_NOT_ANALYZED)) || (param.testflag & T_STATISTICS) || mi_is_crashed(file)) { file->update|=HA_STATE_CHANGED | HA_STATE_ROW_CHANGED; pthread_mutex_lock(&share->intern_lock); share->state.changed&= ~(STATE_CHANGED | STATE_CRASHED | STATE_CRASHED_ON_REPAIR); if (!(table->db_stat & HA_READ_ONLY)) error=update_state_info(¶m,file,UPDATE_TIME | UPDATE_OPEN_COUNT | UPDATE_STAT); pthread_mutex_unlock(&share->intern_lock); info(HA_STATUS_NO_LOCK | HA_STATUS_TIME | HA_STATUS_VARIABLE | HA_STATUS_CONST); } } else if (!mi_is_crashed(file)) { mi_mark_crashed(file); file->update |= HA_STATE_CHANGED | HA_STATE_ROW_CHANGED; } thd->proc_info=old_proc_info; return error ? HA_ADMIN_CORRUPT : HA_ADMIN_OK; } /* analyze the key distribution in the table As the table may be only locked for read, we have to take into account that two threads may do an analyze at the same time! */ int ha_myisam::analyze(THD *thd, HA_CHECK_OPT* check_opt) { int error=0; MI_CHECK param; MYISAM_SHARE* share = file->s; myisamchk_init(¶m); param.thd = thd; param.op_name = (char*) "analyze"; param.db_name = table->table_cache_key; param.table_name = table->table_name; param.testflag=(T_FAST | T_CHECK | T_SILENT | T_STATISTICS | T_DONT_CHECK_CHECKSUM); param.using_global_keycache = 1; if (!(share->state.changed & STATE_NOT_ANALYZED)) return HA_ADMIN_ALREADY_DONE; error = chk_key(¶m, file); if (!error) { pthread_mutex_lock(&share->intern_lock); error=update_state_info(¶m,file,UPDATE_STAT); pthread_mutex_unlock(&share->intern_lock); } else if (!mi_is_crashed(file)) mi_mark_crashed(file); return error ? HA_ADMIN_CORRUPT : HA_ADMIN_OK; } int ha_myisam::restore(THD* thd, HA_CHECK_OPT *check_opt) { HA_CHECK_OPT tmp_check_opt; char* backup_dir = thd->lex.backup_dir; char src_path[FN_REFLEN], dst_path[FN_REFLEN]; char* table_name = table->real_name; int error; const char* errmsg; DBUG_ENTER("restore"); if (fn_format_relative_to_data_home(src_path, table_name, backup_dir, MI_NAME_DEXT)) DBUG_RETURN(HA_ADMIN_INVALID); if (my_copy(src_path, fn_format(dst_path, table->path, "", MI_NAME_DEXT, 4), MYF(MY_WME))) { error = HA_ADMIN_FAILED; errmsg = "Failed in my_copy (Error %d)"; goto err; } tmp_check_opt.init(); tmp_check_opt.flags |= T_VERY_SILENT | T_CALC_CHECKSUM | T_QUICK; DBUG_RETURN(repair(thd, &tmp_check_opt)); err: { MI_CHECK param; myisamchk_init(¶m); param.thd = thd; param.op_name = (char*)"restore"; param.db_name = table->table_cache_key; param.table_name = table->table_name; param.testflag = 0; mi_check_print_error(¶m, errmsg, my_errno); DBUG_RETURN(error); } } int ha_myisam::backup(THD* thd, HA_CHECK_OPT *check_opt) { char* backup_dir = thd->lex.backup_dir; char src_path[FN_REFLEN], dst_path[FN_REFLEN]; char* table_name = table->real_name; int error; const char *errmsg; DBUG_ENTER("ha_myisam::backup"); if (fn_format_relative_to_data_home(dst_path, table_name, backup_dir, reg_ext)) { errmsg = "Failed in fn_format() for .frm file (errno: %d)"; error = HA_ADMIN_INVALID; goto err; } if (my_copy(fn_format(src_path, table->path,"", reg_ext, MY_UNPACK_FILENAME), dst_path, MYF(MY_WME | MY_HOLD_ORIGINAL_MODES | MY_DONT_OVERWRITE_FILE))) { error = HA_ADMIN_FAILED; errmsg = "Failed copying .frm file (errno: %d)"; goto err; } /* Change extension */ if (!fn_format(dst_path, dst_path, "", MI_NAME_DEXT, MY_REPLACE_EXT | MY_UNPACK_FILENAME | MY_SAFE_PATH)) { errmsg = "Failed in fn_format() for .MYD file (errno: %d)"; error = HA_ADMIN_INVALID; goto err; } if (my_copy(fn_format(src_path, table->path,"", MI_NAME_DEXT, MY_UNPACK_FILENAME), dst_path, MYF(MY_WME | MY_HOLD_ORIGINAL_MODES | MY_DONT_OVERWRITE_FILE))) { errmsg = "Failed copying .MYD file (errno: %d)"; error= HA_ADMIN_FAILED; goto err; } DBUG_RETURN(HA_ADMIN_OK); err: { MI_CHECK param; myisamchk_init(¶m); param.thd = thd; param.op_name = (char*)"backup"; param.db_name = table->table_cache_key; param.table_name = table->table_name; param.testflag = 0; mi_check_print_error(¶m,errmsg, my_errno); DBUG_RETURN(error); } } int ha_myisam::repair(THD* thd, HA_CHECK_OPT *check_opt) { int error; MI_CHECK param; ha_rows start_records; if (!file) return HA_ADMIN_INTERNAL_ERROR; myisamchk_init(¶m); param.thd = thd; param.op_name = (char*) "repair"; param.testflag = ((check_opt->flags & ~(T_EXTEND)) | T_SILENT | T_FORCE_CREATE | (check_opt->flags & T_EXTEND ? T_REP : T_REP_BY_SORT)); param.sort_buffer_length= check_opt->sort_buffer_size; start_records=file->state->records; while ((error=repair(thd,param,0)) && param.retry_repair) { param.retry_repair=0; if (test_all_bits(param.testflag, (uint) (T_RETRY_WITHOUT_QUICK | T_QUICK))) { param.testflag&= ~T_RETRY_WITHOUT_QUICK; sql_print_error("Note: Retrying repair of: '%s' without quick", table->path); continue; } param.testflag&= ~T_QUICK; if ((param.testflag & T_REP_BY_SORT)) { param.testflag= (param.testflag & ~T_REP_BY_SORT) | T_REP; sql_print_error("Note: Retrying repair of: '%s' with keycache", table->path); continue; } break; } if (!error && start_records != file->state->records && !(check_opt->flags & T_VERY_SILENT)) { char llbuff[22],llbuff2[22]; sql_print_error("Note: Found %s of %s rows when repairing '%s'", llstr(file->state->records, llbuff), llstr(start_records, llbuff2), table->path); } return error; } int ha_myisam::optimize(THD* thd, HA_CHECK_OPT *check_opt) { if (!file) return HA_ADMIN_INTERNAL_ERROR; MI_CHECK param; myisamchk_init(¶m); param.thd = thd; param.op_name = (char*) "optimize"; param.testflag = (check_opt->flags | T_SILENT | T_FORCE_CREATE | T_REP_BY_SORT | T_STATISTICS | T_SORT_INDEX); param.sort_buffer_length= check_opt->sort_buffer_size; return repair(thd,param,1); } int ha_myisam::repair(THD *thd, MI_CHECK ¶m, bool optimize) { int error=0; uint local_testflag=param.testflag; bool optimize_done= !optimize, statistics_done=0; const char *old_proc_info=thd->proc_info; char fixed_name[FN_REFLEN]; MYISAM_SHARE* share = file->s; ha_rows rows= file->state->records; DBUG_ENTER("ha_myisam::repair"); param.db_name = table->table_cache_key; param.table_name = table->table_name; param.tmpfile_createflag = O_RDWR | O_TRUNC; param.using_global_keycache = 1; param.thd=thd; param.tmpdir=&mysql_tmpdir_list; param.out_flag=0; strmov(fixed_name,file->filename); // Don't lock tables if we have used LOCK TABLE if (!thd->locked_tables && mi_lock_database(file,F_WRLCK)) { mi_check_print_error(¶m,ER(ER_CANT_LOCK),my_errno); DBUG_RETURN(HA_ADMIN_FAILED); } if (!optimize || ((file->state->del || share->state.split != file->state->records) && (!(param.testflag & T_QUICK) || !(share->state.changed & STATE_NOT_OPTIMIZED_KEYS)))) { ulonglong key_map= ((local_testflag & T_CREATE_MISSING_KEYS) ? ((ulonglong) 1L << share->base.keys)-1 : share->state.key_map); uint testflag=param.testflag; if (mi_test_if_sort_rep(file,file->state->records,key_map,0) && (local_testflag & T_REP_BY_SORT)) { local_testflag|= T_STATISTICS; param.testflag|= T_STATISTICS; // We get this for free thd->proc_info="Repair by sorting"; statistics_done=1; error = mi_repair_by_sort(¶m, file, fixed_name, param.testflag & T_QUICK); } else { thd->proc_info="Repair with keycache"; param.testflag &= ~T_REP_BY_SORT; error= mi_repair(¶m, file, fixed_name, param.testflag & T_QUICK); } param.testflag=testflag; optimize_done=1; } if (!error) { if ((local_testflag & T_SORT_INDEX) && (share->state.changed & STATE_NOT_SORTED_PAGES)) { optimize_done=1; thd->proc_info="Sorting index"; error=mi_sort_index(¶m,file,fixed_name); } if (!statistics_done && (local_testflag & T_STATISTICS)) { if (share->state.changed & STATE_NOT_ANALYZED) { optimize_done=1; thd->proc_info="Analyzing"; error = chk_key(¶m, file); } else local_testflag&= ~T_STATISTICS; // Don't update statistics } } thd->proc_info="Saving state"; if (!error) { if ((share->state.changed & STATE_CHANGED) || mi_is_crashed(file)) { share->state.changed&= ~(STATE_CHANGED | STATE_CRASHED | STATE_CRASHED_ON_REPAIR); file->update|=HA_STATE_CHANGED | HA_STATE_ROW_CHANGED; } /* the following 'if', thought conceptually wrong, is a useful optimization nevertheless. */ if (file->state != &file->s->state.state) file->s->state.state = *file->state; if (file->s->base.auto_key) update_auto_increment_key(¶m, file, 1); if (optimize_done) error = update_state_info(¶m, file, UPDATE_TIME | UPDATE_OPEN_COUNT | (local_testflag & T_STATISTICS ? UPDATE_STAT : 0)); info(HA_STATUS_NO_LOCK | HA_STATUS_TIME | HA_STATUS_VARIABLE | HA_STATUS_CONST); if (rows != file->state->records && ! (param.testflag & T_VERY_SILENT)) { char llbuff[22],llbuff2[22]; mi_check_print_warning(¶m,"Number of rows changed from %s to %s", llstr(rows,llbuff), llstr(file->state->records,llbuff2)); } } else { mi_mark_crashed_on_repair(file); file->update |= HA_STATE_CHANGED | HA_STATE_ROW_CHANGED; update_state_info(¶m, file, 0); } thd->proc_info=old_proc_info; if (!thd->locked_tables) mi_lock_database(file,F_UNLCK); DBUG_RETURN(error ? HA_ADMIN_FAILED : !optimize_done ? HA_ADMIN_ALREADY_DONE : HA_ADMIN_OK); } /* Deactive all not unique index that can be recreated fast SYNOPSIS deactivate_non_unique_index() rows Rows to be inserted 0 if we don't know HA_POS_ERROR if we want to disable all keys */ void ha_myisam::deactivate_non_unique_index(ha_rows rows) { MYISAM_SHARE* share = file->s; if (share->state.key_map == ((ulonglong) 1L << share->base.keys)-1) { if (!(specialflag & SPECIAL_SAFE_MODE)) { if (rows == HA_POS_ERROR) mi_extra(file, HA_EXTRA_NO_KEYS, 0); else { /* Only disable old index if the table was empty and we are inserting a lot of rows. We should not do this for only a few rows as this is slower and we don't want to update the key statistics based of only a few rows. */ if (file->state->records == 0 && (!rows || rows >= MI_MIN_ROWS_TO_USE_BULK_INSERT)) mi_disable_non_unique_index(file,rows); else { mi_init_bulk_insert(file, current_thd->variables.bulk_insert_buff_size, rows); table->bulk_insert= 1; } } } enable_activate_all_index=1; } else enable_activate_all_index=0; } bool ha_myisam::activate_all_index(THD *thd) { int error=0; MI_CHECK param; MYISAM_SHARE* share = file->s; DBUG_ENTER("activate_all_index"); mi_end_bulk_insert(file); table->bulk_insert= 0; if (enable_activate_all_index && share->state.key_map != set_bits(ulonglong, share->base.keys)) { const char *save_proc_info=thd->proc_info; thd->proc_info="Creating index"; myisamchk_init(¶m); param.op_name = (char*) "recreating_index"; param.testflag = (T_SILENT | T_REP_BY_SORT | T_QUICK | T_CREATE_MISSING_KEYS); param.myf_rw&= ~MY_WAIT_IF_FULL; param.sort_buffer_length= thd->variables.myisam_sort_buff_size; param.tmpdir=&mysql_tmpdir_list; error=repair(thd,param,0) != HA_ADMIN_OK; thd->proc_info=save_proc_info; } else enable_activate_all_index=1; DBUG_RETURN(error); } bool ha_myisam::check_and_repair(THD *thd) { int error=0; int marked_crashed; HA_CHECK_OPT check_opt; DBUG_ENTER("ha_myisam::auto_check_and_repair"); check_opt.init(); check_opt.flags= T_MEDIUM | T_AUTO_REPAIR; // Don't use quick if deleted rows if (!file->state->del && (myisam_recover_options & HA_RECOVER_QUICK)) check_opt.flags|=T_QUICK; sql_print_error("Warning: Checking table: '%s'",table->path); if ((marked_crashed=mi_is_crashed(file)) || check(thd, &check_opt)) { sql_print_error("Warning: Recovering table: '%s'",table->path); check_opt.flags= ((myisam_recover_options & HA_RECOVER_BACKUP ? T_BACKUP_DATA : 0) | (marked_crashed ? 0 : T_QUICK) | (myisam_recover_options & HA_RECOVER_FORCE ? 0 : T_SAFE_REPAIR) | T_AUTO_REPAIR); if (repair(thd, &check_opt)) error=1; } DBUG_RETURN(error); } bool ha_myisam::is_crashed() const { return (file->s->state.changed & STATE_CRASHED || (my_disable_locking && file->s->state.open_count)); } int ha_myisam::update_row(const byte * old_data, byte * new_data) { statistic_increment(ha_update_count,&LOCK_status); if (table->time_stamp) update_timestamp(new_data+table->time_stamp-1); return mi_update(file,old_data,new_data); } int ha_myisam::delete_row(const byte * buf) { statistic_increment(ha_delete_count,&LOCK_status); return mi_delete(file,buf); } int ha_myisam::index_read(byte * buf, const byte * key, uint key_len, enum ha_rkey_function find_flag) { statistic_increment(ha_read_key_count,&LOCK_status); int error=mi_rkey(file,buf,active_index, key, key_len, (enum ha_rkey_function)find_flag); table->status=error ? STATUS_NOT_FOUND: 0; return error; } int ha_myisam::index_read_idx(byte * buf, uint index, const byte * key, uint key_len, enum ha_rkey_function find_flag) { statistic_increment(ha_read_key_count,&LOCK_status); int error=mi_rkey(file,buf,index, key, key_len, (enum ha_rkey_function)find_flag); table->status=error ? STATUS_NOT_FOUND: 0; return error; } int ha_myisam::index_read_last(byte * buf, const byte * key, uint key_len) { statistic_increment(ha_read_key_count,&LOCK_status); int error=mi_rkey(file,buf,active_index, key, key_len, HA_READ_PREFIX_LAST); table->status=error ? STATUS_NOT_FOUND: 0; return error; } int ha_myisam::index_next(byte * buf) { statistic_increment(ha_read_next_count,&LOCK_status); int error=mi_rnext(file,buf,active_index); table->status=error ? STATUS_NOT_FOUND: 0; return error; } int ha_myisam::index_prev(byte * buf) { statistic_increment(ha_read_prev_count,&LOCK_status); int error=mi_rprev(file,buf, active_index); table->status=error ? STATUS_NOT_FOUND: 0; return error; } int ha_myisam::index_first(byte * buf) { statistic_increment(ha_read_first_count,&LOCK_status); int error=mi_rfirst(file, buf, active_index); table->status=error ? STATUS_NOT_FOUND: 0; return error; } int ha_myisam::index_last(byte * buf) { statistic_increment(ha_read_last_count,&LOCK_status); int error=mi_rlast(file, buf, active_index); table->status=error ? STATUS_NOT_FOUND: 0; return error; } int ha_myisam::index_next_same(byte * buf, const byte *key __attribute__((unused)), uint length __attribute__((unused))) { statistic_increment(ha_read_next_count,&LOCK_status); int error=mi_rnext_same(file,buf); table->status=error ? STATUS_NOT_FOUND: 0; return error; } int ha_myisam::rnd_init(bool scan) { if (scan) return mi_scan_init(file); return mi_extra(file, HA_EXTRA_RESET, 0); } int ha_myisam::rnd_next(byte *buf) { statistic_increment(ha_read_rnd_next_count,&LOCK_status); int error=mi_scan(file, buf); table->status=error ? STATUS_NOT_FOUND: 0; return error; } int ha_myisam::restart_rnd_next(byte *buf, byte *pos) { return rnd_pos(buf,pos); } int ha_myisam::rnd_pos(byte * buf, byte *pos) { statistic_increment(ha_read_rnd_count,&LOCK_status); int error=mi_rrnd(file, buf, ha_get_ptr(pos,ref_length)); table->status=error ? STATUS_NOT_FOUND: 0; return error; } void ha_myisam::position(const byte* record) { my_off_t position=mi_position(file); ha_store_ptr(ref, ref_length, position); } void ha_myisam::info(uint flag) { MI_ISAMINFO info; char name_buff[FN_REFLEN]; (void) mi_status(file,&info,flag); if (flag & HA_STATUS_VARIABLE) { records = info.records; deleted = info.deleted; data_file_length=info.data_file_length; index_file_length=info.index_file_length; delete_length = info.delete_length; check_time = info.check_time; mean_rec_length=info.mean_reclength; } if (flag & HA_STATUS_CONST) { max_data_file_length=info.max_data_file_length; max_index_file_length=info.max_index_file_length; create_time = info.create_time; sortkey = info.sortkey; ref_length=info.reflength; table->db_options_in_use = info.options; block_size=myisam_block_size; table->keys_in_use&= info.key_map; table->keys_for_keyread&= info.key_map; table->db_record_offset=info.record_offset; if (table->key_parts) memcpy((char*) table->key_info[0].rec_per_key, (char*) info.rec_per_key, sizeof(table->key_info[0].rec_per_key)*table->key_parts); raid_type=info.raid_type; raid_chunks=info.raid_chunks; raid_chunksize=info.raid_chunksize; /* Set data_file_name and index_file_name to point at the symlink value if table is symlinked (Ie; Real name is not same as generated name) */ data_file_name=index_file_name=0; fn_format(name_buff, file->filename, "", MI_NAME_DEXT, 2); if (strcmp(name_buff, info.data_file_name)) data_file_name=info.data_file_name; strmov(fn_ext(name_buff),MI_NAME_IEXT); if (strcmp(name_buff, info.index_file_name)) index_file_name=info.index_file_name; } if (flag & HA_STATUS_ERRKEY) { errkey = info.errkey; ha_store_ptr(dupp_ref, ref_length, info.dupp_key_pos); } if (flag & HA_STATUS_TIME) update_time = info.update_time; if (flag & HA_STATUS_AUTO) auto_increment_value= info.auto_increment; } int ha_myisam::extra(enum ha_extra_function operation) { if ((specialflag & SPECIAL_SAFE_MODE) && operation == HA_EXTRA_KEYREAD) return 0; return mi_extra(file, operation, 0); } /* To be used with WRITE_CACHE and EXTRA_CACHE */ int ha_myisam::extra_opt(enum ha_extra_function operation, ulong cache_size) { if ((specialflag & SPECIAL_SAFE_MODE) && operation == HA_EXTRA_WRITE_CACHE) return 0; return mi_extra(file, operation, (void*) &cache_size); } int ha_myisam::reset(void) { return mi_extra(file, HA_EXTRA_RESET, 0); } int ha_myisam::delete_all_rows() { return mi_delete_all_rows(file); } int ha_myisam::delete_table(const char *name) { return mi_delete_table(name); } int ha_myisam::external_lock(THD *thd, int lock_type) { if (!table->tmp_table) return mi_lock_database(file,lock_type); return 0; } THR_LOCK_DATA **ha_myisam::store_lock(THD *thd, THR_LOCK_DATA **to, enum thr_lock_type lock_type) { if (lock_type != TL_IGNORE && file->lock.type == TL_UNLOCK) file->lock.type=lock_type; *to++= &file->lock; return to; } void ha_myisam::update_create_info(HA_CREATE_INFO *create_info) { table->file->info(HA_STATUS_AUTO | HA_STATUS_CONST); if (!(create_info->used_fields & HA_CREATE_USED_AUTO)) { create_info->auto_increment_value=auto_increment_value; } if (!(create_info->used_fields & HA_CREATE_USED_RAID)) { create_info->raid_type= raid_type; create_info->raid_chunks= raid_chunks; create_info->raid_chunksize= raid_chunksize; } create_info->data_file_name=data_file_name; create_info->index_file_name=index_file_name; } int ha_myisam::create(const char *name, register TABLE *table_arg, HA_CREATE_INFO *info) { int error; uint i,j,recpos,minpos,fieldpos,temp_length,length; bool found_real_auto_increment=0; enum ha_base_keytype type; char buff[FN_REFLEN]; KEY *pos; MI_KEYDEF *keydef; MI_COLUMNDEF *recinfo,*recinfo_pos; HA_KEYSEG *keyseg; uint options=table_arg->db_options_in_use; DBUG_ENTER("ha_myisam::create"); type=HA_KEYTYPE_BINARY; // Keep compiler happy if (!(my_multi_malloc(MYF(MY_WME), &recinfo,(table_arg->fields*2+2)*sizeof(MI_COLUMNDEF), &keydef, table_arg->keys*sizeof(MI_KEYDEF), &keyseg, ((table_arg->key_parts + table_arg->keys) * sizeof(HA_KEYSEG)), 0))) DBUG_RETURN(1); pos=table_arg->key_info; for (i=0; i < table_arg->keys ; i++, pos++) { keydef[i].flag= (pos->flags & (HA_NOSAME | HA_FULLTEXT | HA_SPATIAL)); keydef[i].key_alg= pos->algorithm == HA_KEY_ALG_UNDEF ? (pos->flags & HA_SPATIAL ? HA_KEY_ALG_RTREE : HA_KEY_ALG_BTREE) : pos->algorithm; keydef[i].seg=keyseg; keydef[i].keysegs=pos->key_parts; for (j=0 ; j < pos->key_parts ; j++) { keydef[i].seg[j].flag=pos->key_part[j].key_part_flag; Field *field=pos->key_part[j].field; type=field->key_type(); if (options & HA_OPTION_PACK_KEYS || (pos->flags & (HA_PACK_KEY | HA_BINARY_PACK_KEY | HA_SPACE_PACK_USED))) { if (pos->key_part[j].length > 8 && (type == HA_KEYTYPE_TEXT || type == HA_KEYTYPE_NUM || (type == HA_KEYTYPE_BINARY && !field->zero_pack()))) { /* No blobs here */ if (j == 0) keydef[i].flag|=HA_PACK_KEY; if (!(field->flags & ZEROFILL_FLAG) && (field->type() == FIELD_TYPE_STRING || field->type() == FIELD_TYPE_VAR_STRING || ((int) (pos->key_part[j].length - field->decimals())) >= 4)) keydef[i].seg[j].flag|=HA_SPACE_PACK; } else if (j == 0 && (!(pos->flags & HA_NOSAME) || pos->key_length > 16)) keydef[i].flag|= HA_BINARY_PACK_KEY; } keydef[i].seg[j].type= (int) type; keydef[i].seg[j].start= pos->key_part[j].offset; keydef[i].seg[j].length= pos->key_part[j].length; keydef[i].seg[j].bit_start=keydef[i].seg[j].bit_end=0; keydef[i].seg[j].language = field->charset()->number; if (field->null_ptr) { keydef[i].seg[j].null_bit=field->null_bit; keydef[i].seg[j].null_pos= (uint) (field->null_ptr- (uchar*) table_arg->record[0]); } else { keydef[i].seg[j].null_bit=0; keydef[i].seg[j].null_pos=0; } if (field->type() == FIELD_TYPE_BLOB || field->type() == FIELD_TYPE_GEOMETRY) { keydef[i].seg[j].flag|=HA_BLOB_PART; /* save number of bytes used to pack length */ keydef[i].seg[j].bit_start= (uint) (field->pack_length() - table_arg->blob_ptr_size); } } keyseg+=pos->key_parts; } if (table_arg->found_next_number_field) { keydef[table_arg->next_number_index].flag|= HA_AUTO_KEY; found_real_auto_increment= table_arg->next_number_key_offset == 0; } recpos=0; recinfo_pos=recinfo; while (recpos < (uint) table_arg->reclength) { Field **field,*found=0; minpos=table_arg->reclength; length=0; for (field=table_arg->field ; *field ; field++) { if ((fieldpos=(*field)->offset()) >= recpos && fieldpos <= minpos) { /* skip null fields */ if (!(temp_length= (*field)->pack_length())) continue; /* Skip null-fields */ if (! found || fieldpos < minpos || (fieldpos == minpos && temp_length < length)) { minpos=fieldpos; found= *field; length=temp_length; } } } DBUG_PRINT("loop",("found: %lx recpos: %d minpos: %d length: %d", found,recpos,minpos,length)); if (recpos != minpos) { // Reserved space (Null bits?) bzero((char*) recinfo_pos,sizeof(*recinfo_pos)); recinfo_pos->type=(int) FIELD_NORMAL; recinfo_pos++->length= (uint16) (minpos-recpos); } if (! found) break; if (found->flags & BLOB_FLAG) { recinfo_pos->type= (int) FIELD_BLOB; } else if (!(options & HA_OPTION_PACK_RECORD)) recinfo_pos->type= (int) FIELD_NORMAL; else if (found->zero_pack()) recinfo_pos->type= (int) FIELD_SKIP_ZERO; else recinfo_pos->type= (int) ((length <= 3 || (found->flags & ZEROFILL_FLAG)) ? FIELD_NORMAL : found->type() == FIELD_TYPE_STRING || found->type() == FIELD_TYPE_VAR_STRING ? FIELD_SKIP_ENDSPACE : FIELD_SKIP_PRESPACE); if (found->null_ptr) { recinfo_pos->null_bit=found->null_bit; recinfo_pos->null_pos= (uint) (found->null_ptr- (uchar*) table_arg->record[0]); } else { recinfo_pos->null_bit=0; recinfo_pos->null_pos=0; } (recinfo_pos++) ->length=(uint16) length; recpos=minpos+length; DBUG_PRINT("loop",("length: %d type: %d", recinfo_pos[-1].length,recinfo_pos[-1].type)); } MI_CREATE_INFO create_info; bzero((char*) &create_info,sizeof(create_info)); create_info.max_rows=table_arg->max_rows; create_info.reloc_rows=table_arg->min_rows; create_info.with_auto_increment=found_real_auto_increment; create_info.auto_increment=(info->auto_increment_value ? info->auto_increment_value -1 : (ulonglong) 0); create_info.data_file_length= ((ulonglong) table_arg->max_rows * table_arg->avg_row_length); create_info.raid_type=info->raid_type; create_info.raid_chunks= (info->raid_chunks ? info->raid_chunks : RAID_DEFAULT_CHUNKS); create_info.raid_chunksize=(info->raid_chunksize ? info->raid_chunksize : RAID_DEFAULT_CHUNKSIZE); create_info.data_file_name= info->data_file_name; create_info.index_file_name=info->index_file_name; error=mi_create(fn_format(buff,name,"","",2+4), table_arg->keys,keydef, (uint) (recinfo_pos-recinfo), recinfo, 0, (MI_UNIQUEDEF*) 0, &create_info, (((options & HA_OPTION_PACK_RECORD) ? HA_PACK_RECORD : 0) | ((options & HA_OPTION_CHECKSUM) ? HA_CREATE_CHECKSUM : 0) | ((options & HA_OPTION_DELAY_KEY_WRITE) ? HA_CREATE_DELAY_KEY_WRITE : 0))); my_free((gptr) recinfo,MYF(0)); DBUG_RETURN(error); } int ha_myisam::rename_table(const char * from, const char * to) { return mi_rename(from,to); } longlong ha_myisam::get_auto_increment() { if (!table->next_number_key_offset) { // Autoincrement at key-start ha_myisam::info(HA_STATUS_AUTO); return auto_increment_value; } if (table->bulk_insert) mi_flush_bulk_insert(file, table->next_number_index); longlong nr; int error; byte key[MI_MAX_KEY_LENGTH]; (void) extra(HA_EXTRA_KEYREAD); key_copy(key,table,table->next_number_index, table->next_number_key_offset); error=mi_rkey(file,table->record[1],(int) table->next_number_index, key,table->next_number_key_offset,HA_READ_PREFIX_LAST); if (error) nr=1; else nr=(longlong) table->next_number_field->val_int_offset(table->rec_buff_length)+1; extra(HA_EXTRA_NO_KEYREAD); return nr; } /* Find out how many rows there is in the given range SYNOPSIS records_in_range() inx Index to use start_key Start of range. Null pointer if from first key start_key_len Length of start key start_search_flag Flag if start key should be included or not end_key End of range. Null pointer if to last key end_key_len Length of end key end_search_flag Flag if start key should be included or not NOTES start_search_flag can have one of the following values: HA_READ_KEY_EXACT Include the key in the range HA_READ_AFTER_KEY Don't include key in range end_search_flag can have one of the following values: HA_READ_BEFORE_KEY Don't include key in range HA_READ_AFTER_KEY Include all 'end_key' values in the range RETURN HA_POS_ERROR Something is wrong with the index tree. 0 There is no matching keys in the given range number > 0 There is approximately 'number' matching rows in the range. */ ha_rows ha_myisam::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) mi_records_in_range(file, inx, start_key,start_key_len, start_search_flag, end_key,end_key_len, end_search_flag); } int ha_myisam::ft_read(byte * buf) { int error; if (!ft_handler) return -1; thread_safe_increment(ha_read_next_count,&LOCK_status); // why ? error=ft_handler->please->read_next(ft_handler,(char*) buf); table->status=error ? STATUS_NOT_FOUND: 0; return error; }