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Diffstat (limited to 'sql/ha_myisammrg.cc')
| -rw-r--r-- | sql/ha_myisammrg.cc | 562 |
1 files changed, 0 insertions, 562 deletions
diff --git a/sql/ha_myisammrg.cc b/sql/ha_myisammrg.cc deleted file mode 100644 index 09445f775de..00000000000 --- a/sql/ha_myisammrg.cc +++ /dev/null @@ -1,562 +0,0 @@ -/* Copyright (C) 2000-2006 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; version 2 of the License. - - 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_IMPLEMENTATION -#pragma implementation // gcc: Class implementation -#endif - -#include "mysql_priv.h" -#include <m_ctype.h> -#include "ha_myisammrg.h" -#ifndef MASTER -#include "../srclib/myisammrg/myrg_def.h" -#else -#include "../myisammrg/myrg_def.h" -#endif - -/***************************************************************************** -** MyISAM MERGE tables -*****************************************************************************/ - -/* MyISAM MERGE handlerton */ - -handlerton myisammrg_hton= { - "MRG_MYISAM", - SHOW_OPTION_YES, - "Collection of identical MyISAM tables", - DB_TYPE_MRG_MYISAM, - NULL, - 0, /* slot */ - 0, /* savepoint size. */ - NULL, /* close_connection */ - NULL, /* savepoint */ - NULL, /* rollback to savepoint */ - NULL, /* release savepoint */ - NULL, /* commit */ - NULL, /* rollback */ - NULL, /* prepare */ - NULL, /* recover */ - NULL, /* commit_by_xid */ - NULL, /* rollback_by_xid */ - NULL, /* create_cursor_read_view */ - NULL, /* set_cursor_read_view */ - NULL, /* close_cursor_read_view */ - HTON_CAN_RECREATE -}; - - -ha_myisammrg::ha_myisammrg(TABLE *table_arg) - :handler(&myisammrg_hton, table_arg), file(0) -{} - -static const char *ha_myisammrg_exts[] = { - ".MRG", - NullS -}; - -const char **ha_myisammrg::bas_ext() const -{ - return ha_myisammrg_exts; -} - - -const char *ha_myisammrg::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"); -} - - -int ha_myisammrg::open(const char *name, int mode, uint test_if_locked) -{ - char name_buff[FN_REFLEN]; - - DBUG_PRINT("info", ("ha_myisammrg::open")); - if (!(file=myrg_open(fn_format(name_buff,name,"","",2 | 4), mode, - test_if_locked))) - { - DBUG_PRINT("info", ("ha_myisammrg::open exit %d", my_errno)); - return (my_errno ? my_errno : -1); - } - DBUG_PRINT("info", ("ha_myisammrg::open myrg_extrafunc...")) - myrg_extrafunc(file, query_cache_invalidate_by_MyISAM_filename_ref); - if (!(test_if_locked == HA_OPEN_WAIT_IF_LOCKED || - test_if_locked == HA_OPEN_ABORT_IF_LOCKED)) - myrg_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)) - myrg_extra(file,HA_EXTRA_WAIT_LOCK,0); - - if (table->s->reclength != mean_rec_length && mean_rec_length) - { - DBUG_PRINT("error",("reclength: %lu mean_rec_length: %lu", - table->s->reclength, mean_rec_length)); - goto err; - } -#if !defined(BIG_TABLES) || SIZEOF_OFF_T == 4 - /* Merge table has more than 2G rows */ - if (table->s->crashed) - goto err; -#endif - return (0); -err: - myrg_close(file); - file=0; - return (my_errno= HA_ERR_WRONG_MRG_TABLE_DEF); -} - -int ha_myisammrg::close(void) -{ - return myrg_close(file); -} - -int ha_myisammrg::write_row(byte * buf) -{ - statistic_increment(table->in_use->status_var.ha_write_count,&LOCK_status); - - if (file->merge_insert_method == MERGE_INSERT_DISABLED || !file->tables) - return (HA_ERR_TABLE_READONLY); - - if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_INSERT) - table->timestamp_field->set_time(); - if (table->next_number_field && buf == table->record[0]) - { - int error; - if ((error= update_auto_increment())) - return error; - } - return myrg_write(file,buf); -} - -int ha_myisammrg::update_row(const byte * old_data, byte * new_data) -{ - statistic_increment(table->in_use->status_var.ha_update_count,&LOCK_status); - if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_UPDATE) - table->timestamp_field->set_time(); - return myrg_update(file,old_data,new_data); -} - -int ha_myisammrg::delete_row(const byte * buf) -{ - statistic_increment(table->in_use->status_var.ha_delete_count,&LOCK_status); - return myrg_delete(file,buf); -} - -int ha_myisammrg::index_read(byte * buf, const byte * key, - uint key_len, enum ha_rkey_function find_flag) -{ - statistic_increment(table->in_use->status_var.ha_read_key_count, - &LOCK_status); - int error=myrg_rkey(file,buf,active_index, key, key_len, find_flag); - table->status=error ? STATUS_NOT_FOUND: 0; - return error; -} - -int ha_myisammrg::index_read_idx(byte * buf, uint index, const byte * key, - uint key_len, enum ha_rkey_function find_flag) -{ - statistic_increment(table->in_use->status_var.ha_read_key_count, - &LOCK_status); - int error=myrg_rkey(file,buf,index, key, key_len, find_flag); - table->status=error ? STATUS_NOT_FOUND: 0; - return error; -} - -int ha_myisammrg::index_read_last(byte * buf, const byte * key, uint key_len) -{ - statistic_increment(table->in_use->status_var.ha_read_key_count, - &LOCK_status); - int error=myrg_rkey(file,buf,active_index, key, key_len, - HA_READ_PREFIX_LAST); - table->status=error ? STATUS_NOT_FOUND: 0; - return error; -} - -int ha_myisammrg::index_next(byte * buf) -{ - statistic_increment(table->in_use->status_var.ha_read_next_count, - &LOCK_status); - int error=myrg_rnext(file,buf,active_index); - table->status=error ? STATUS_NOT_FOUND: 0; - return error; -} - -int ha_myisammrg::index_prev(byte * buf) -{ - statistic_increment(table->in_use->status_var.ha_read_prev_count, - &LOCK_status); - int error=myrg_rprev(file,buf, active_index); - table->status=error ? STATUS_NOT_FOUND: 0; - return error; -} - -int ha_myisammrg::index_first(byte * buf) -{ - statistic_increment(table->in_use->status_var.ha_read_first_count, - &LOCK_status); - int error=myrg_rfirst(file, buf, active_index); - table->status=error ? STATUS_NOT_FOUND: 0; - return error; -} - -int ha_myisammrg::index_last(byte * buf) -{ - statistic_increment(table->in_use->status_var.ha_read_last_count, - &LOCK_status); - int error=myrg_rlast(file, buf, active_index); - table->status=error ? STATUS_NOT_FOUND: 0; - return error; -} - -int ha_myisammrg::index_next_same(byte * buf, - const byte *key __attribute__((unused)), - uint length __attribute__((unused))) -{ - statistic_increment(table->in_use->status_var.ha_read_next_count, - &LOCK_status); - int error=myrg_rnext_same(file,buf); - table->status=error ? STATUS_NOT_FOUND: 0; - return error; -} - -int ha_myisammrg::rnd_init(bool scan) -{ - return myrg_extra(file,HA_EXTRA_RESET,0); -} - -int ha_myisammrg::rnd_next(byte *buf) -{ - statistic_increment(table->in_use->status_var.ha_read_rnd_next_count, - &LOCK_status); - int error=myrg_rrnd(file, buf, HA_OFFSET_ERROR); - table->status=error ? STATUS_NOT_FOUND: 0; - return error; -} - -int ha_myisammrg::rnd_pos(byte * buf, byte *pos) -{ - statistic_increment(table->in_use->status_var.ha_read_rnd_count, - &LOCK_status); - int error=myrg_rrnd(file, buf, my_get_ptr(pos,ref_length)); - table->status=error ? STATUS_NOT_FOUND: 0; - return error; -} - -void ha_myisammrg::position(const byte *record) -{ - ulonglong position= myrg_position(file); - my_store_ptr(ref, ref_length, (my_off_t) position); -} - - -ha_rows ha_myisammrg::records_in_range(uint inx, key_range *min_key, - key_range *max_key) -{ - return (ha_rows) myrg_records_in_range(file, (int) inx, min_key, max_key); -} - - -int ha_myisammrg::info(uint flag) -{ - MYMERGE_INFO info; - (void) myrg_status(file,&info,flag); - /* - The following fails if one has not compiled MySQL with -DBIG_TABLES - and one has more than 2^32 rows in the merge tables. - */ - records = (ha_rows) info.records; - deleted = (ha_rows) info.deleted; -#if !defined(BIG_TABLES) || SIZEOF_OFF_T == 4 - if ((info.records >= (ulonglong) 1 << 32) || - (info.deleted >= (ulonglong) 1 << 32)) - table->s->crashed= 1; -#endif - data_file_length=info.data_file_length; - errkey = info.errkey; - table->s->keys_in_use.set_prefix(table->s->keys); - table->s->db_options_in_use= info.options; - table->s->is_view= 1; - mean_rec_length= info.reclength; - - /* - The handler::block_size is used all over the code in index scan cost - calculations. It is used to get number of disk seeks required to - retrieve a number of index tuples. - If the merge table has N underlying tables, then (assuming underlying - tables have equal size, the only "simple" approach we can use) - retrieving X index records from a merge table will require N times more - disk seeks compared to doing the same on a MyISAM table with equal - number of records. - In the edge case (file_tables > myisam_block_size) we'll get - block_size==0, and index calculation code will act as if we need one - disk seek to retrieve one index tuple. - - TODO: In 5.2 index scan cost calculation will be factored out into a - virtual function in class handler and we'll be able to remove this hack. - */ - block_size= 0; - if (file->tables) - block_size= myisam_block_size / file->tables; - - update_time=0; -#if SIZEOF_OFF_T > 4 - ref_length=6; // Should be big enough -#else - ref_length=4; // Can't be > than my_off_t -#endif - if (flag & HA_STATUS_CONST) - { - if (table->s->key_parts && info.rec_per_key) - { -#ifdef HAVE_purify - /* - valgrind may be unhappy about it, because optimizer may access values - between file->keys and table->key_parts, that will be uninitialized. - It's safe though, because even if opimizer will decide to use a key - with such a number, it'll be an error later anyway. - */ - bzero((char*) table->key_info[0].rec_per_key, - sizeof(table->key_info[0].rec_per_key) * table->s->key_parts); -#endif - memcpy((char*) table->key_info[0].rec_per_key, - (char*) info.rec_per_key, - sizeof(table->key_info[0].rec_per_key) * - min(file->keys, table->s->key_parts)); - } - } - return 0; -} - - -int ha_myisammrg::extra(enum ha_extra_function operation) -{ - /* As this is just a mapping, we don't have to force the underlying - tables to be closed */ - if (operation == HA_EXTRA_FORCE_REOPEN || - operation == HA_EXTRA_PREPARE_FOR_DELETE) - return 0; - return myrg_extra(file,operation,0); -} - - -/* To be used with WRITE_CACHE, EXTRA_CACHE and BULK_INSERT_BEGIN */ - -int ha_myisammrg::extra_opt(enum ha_extra_function operation, ulong cache_size) -{ - if ((specialflag & SPECIAL_SAFE_MODE) && operation == HA_EXTRA_WRITE_CACHE) - return 0; - return myrg_extra(file, operation, (void*) &cache_size); -} - -int ha_myisammrg::external_lock(THD *thd, int lock_type) -{ - return myrg_lock_database(file,lock_type); -} - -uint ha_myisammrg::lock_count(void) const -{ - return file->tables; -} - - -THR_LOCK_DATA **ha_myisammrg::store_lock(THD *thd, - THR_LOCK_DATA **to, - enum thr_lock_type lock_type) -{ - MYRG_TABLE *open_table; - - for (open_table=file->open_tables ; - open_table != file->end_table ; - open_table++) - { - *(to++)= &open_table->table->lock; - if (lock_type != TL_IGNORE && open_table->table->lock.type == TL_UNLOCK) - open_table->table->lock.type=lock_type; - } - return to; -} - - -/* Find out database name and table name from a filename */ - -static void split_file_name(const char *file_name, - LEX_STRING *db, LEX_STRING *name) -{ - uint dir_length, prefix_length; - char buff[FN_REFLEN]; - - db->length= 0; - strmake(buff, file_name, sizeof(buff)-1); - dir_length= dirname_length(buff); - if (dir_length > 1) - { - /* Get database */ - buff[dir_length-1]= 0; // Remove end '/' - prefix_length= dirname_length(buff); - db->str= (char*) file_name+ prefix_length; - db->length= dir_length - prefix_length -1; - } - name->str= (char*) file_name+ dir_length; - name->length= (uint) (fn_ext(name->str) - name->str); -} - - -void ha_myisammrg::update_create_info(HA_CREATE_INFO *create_info) -{ - DBUG_ENTER("ha_myisammrg::update_create_info"); - - if (!(create_info->used_fields & HA_CREATE_USED_UNION)) - { - MYRG_TABLE *open_table; - THD *thd=current_thd; - - create_info->merge_list.next= &create_info->merge_list.first; - create_info->merge_list.elements=0; - - for (open_table=file->open_tables ; - open_table != file->end_table ; - open_table++) - { - TABLE_LIST *ptr; - LEX_STRING db, name; - - if (!(ptr = (TABLE_LIST *) thd->calloc(sizeof(TABLE_LIST)))) - goto err; - split_file_name(open_table->table->filename, &db, &name); - if (!(ptr->table_name= thd->strmake(name.str, name.length))) - goto err; - if (db.length && !(ptr->db= thd->strmake(db.str, db.length))) - goto err; - - create_info->merge_list.elements++; - (*create_info->merge_list.next) = (byte*) ptr; - create_info->merge_list.next= (byte**) &ptr->next_local; - } - *create_info->merge_list.next=0; - } - if (!(create_info->used_fields & HA_CREATE_USED_INSERT_METHOD)) - { - create_info->merge_insert_method = file->merge_insert_method; - } - DBUG_VOID_RETURN; - -err: - create_info->merge_list.elements=0; - create_info->merge_list.first=0; - DBUG_VOID_RETURN; -} - - -int ha_myisammrg::create(const char *name, register TABLE *form, - HA_CREATE_INFO *create_info) -{ - char buff[FN_REFLEN]; - const char **table_names, **pos; - TABLE_LIST *tables= (TABLE_LIST*) create_info->merge_list.first; - THD *thd= current_thd; - uint dirlgt= dirname_length(name); - DBUG_ENTER("ha_myisammrg::create"); - - if (!(table_names= (const char**) - thd->alloc((create_info->merge_list.elements+1) * sizeof(char*)))) - DBUG_RETURN(HA_ERR_OUT_OF_MEM); - for (pos= table_names; tables; tables= tables->next_local) - { - const char *table_name; - TABLE **tbl= 0; - if (create_info->options & HA_LEX_CREATE_TMP_TABLE) - tbl= find_temporary_table(thd, tables->db, tables->table_name); - if (!tbl) - { - /* - Construct the path to the MyISAM table. Try to meet two conditions: - 1.) Allow to include MyISAM tables from different databases, and - 2.) allow for moving DATADIR around in the file system. - The first means that we need paths in the .MRG file. The second - means that we should not have absolute paths in the .MRG file. - The best, we can do, is to use 'mysql_data_home', which is '.' - in mysqld and may be an absolute path in an embedded server. - This means that it might not be possible to move the DATADIR of - an embedded server without changing the paths in the .MRG file. - */ - uint length= my_snprintf(buff, FN_REFLEN, "%s/%s/%s", mysql_data_home, - tables->db, tables->table_name); - /* - If a MyISAM table is in the same directory as the MERGE table, - we use the table name without a path. This means that the - DATADIR can easily be moved even for an embedded server as long - as the MyISAM tables are from the same database as the MERGE table. - */ - if ((dirname_length(buff) == dirlgt) && ! memcmp(buff, name, dirlgt)) - table_name= tables->table_name; - else - if (! (table_name= thd->strmake(buff, length))) - DBUG_RETURN(HA_ERR_OUT_OF_MEM); - } - else - table_name= (*tbl)->s->path; - *pos++= table_name; - } - *pos=0; - DBUG_RETURN(myrg_create(fn_format(buff,name,"","",2+4+16), - table_names, - create_info->merge_insert_method, - (my_bool) 0)); -} - - -void ha_myisammrg::append_create_info(String *packet) -{ - const char *current_db; - uint db_length; - THD *thd= current_thd; - - if (file->merge_insert_method != MERGE_INSERT_DISABLED) - { - packet->append(STRING_WITH_LEN(" INSERT_METHOD=")); - packet->append(get_type(&merge_insert_method,file->merge_insert_method-1)); - } - packet->append(STRING_WITH_LEN(" UNION=(")); - MYRG_TABLE *open_table,*first; - - current_db= table->s->db; - db_length= (uint) strlen(current_db); - - for (first=open_table=file->open_tables ; - open_table != file->end_table ; - open_table++) - { - LEX_STRING db, name; - split_file_name(open_table->table->filename, &db, &name); - if (open_table != first) - packet->append(','); - /* Report database for mapped table if it isn't in current database */ - if (db.length && - (db_length != db.length || - strncmp(current_db, db.str, db.length))) - { - append_identifier(thd, packet, db.str, db.length); - packet->append('.'); - } - append_identifier(thd, packet, name.str, name.length); - } - packet->append(')'); -} |