diff options
Diffstat (limited to 'storage/myisammrg/ha_myisammrg.h')
| -rw-r--r-- | storage/myisammrg/ha_myisammrg.h | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/storage/myisammrg/ha_myisammrg.h b/storage/myisammrg/ha_myisammrg.h new file mode 100644 index 00000000..6da327ec --- /dev/null +++ b/storage/myisammrg/ha_myisammrg.h @@ -0,0 +1,162 @@ +/* + Copyright (c) 2000, 2011, Oracle and/or its affiliates + + 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */ + + +#ifdef USE_PRAGMA_INTERFACE +#pragma interface /* gcc class implementation */ +#endif + +/* class for the the myisam merge handler */ + +#include <myisammrg.h> + +/** + Represents one name of a MERGE child. + + @todo: Add MYRG_SHARE and store chlidren names in the + share. +*/ + +class Mrg_child_def: public Sql_alloc +{ + /* Remembered MERGE child def version. See top comment in ha_myisammrg.cc */ + enum_table_ref_type m_child_table_ref_type; + ulong m_child_def_version; +public: + LEX_STRING db; + LEX_STRING name; + + /* Access MERGE child def version. See top comment in ha_myisammrg.cc */ + inline enum_table_ref_type get_child_table_ref_type() + { + return m_child_table_ref_type; + } + inline ulong get_child_def_version() + { + return m_child_def_version; + } + inline void set_child_def_version(enum_table_ref_type child_table_ref_type, + ulong version) + { + m_child_table_ref_type= child_table_ref_type; + m_child_def_version= version; + } + + Mrg_child_def(char *db_arg, size_t db_len_arg, + char *table_name_arg, size_t table_name_len_arg) + { + db.str= db_arg; + db.length= db_len_arg; + name.str= table_name_arg; + name.length= table_name_len_arg; + m_child_def_version= ~0UL; + m_child_table_ref_type= TABLE_REF_NULL; + } +}; + + +class ha_myisammrg final : public handler +{ + MYRG_INFO *file; + my_bool is_cloned; /* This instance has been cloned */ + +public: + MEM_ROOT children_mem_root; /* mem root for children list */ + List<Mrg_child_def> child_def_list; + TABLE_LIST *children_l; /* children list */ + TABLE_LIST **children_last_l; /* children list end */ + uint test_if_locked; /* flags from ::open() */ + + ha_myisammrg(handlerton *hton, TABLE_SHARE *table_arg); + ~ha_myisammrg(); + const char *index_type(uint key_number); + ulonglong table_flags() const + { + return (HA_REC_NOT_IN_SEQ | HA_AUTO_PART_KEY | HA_NO_TRANSACTIONS | + HA_BINLOG_ROW_CAPABLE | HA_BINLOG_STMT_CAPABLE | + HA_NULL_IN_KEY | HA_CAN_INDEX_BLOBS | HA_FILE_BASED | + HA_ANY_INDEX_MAY_BE_UNIQUE | HA_CAN_BIT_FIELD | + HA_HAS_RECORDS | HA_CAN_EXPORT | + HA_NO_COPY_ON_ALTER | + HA_DUPLICATE_POS | HA_CAN_MULTISTEP_MERGE); + } + ulong index_flags(uint inx, uint part, bool all_parts) const + { + return ((table_share->key_info[inx].algorithm == HA_KEY_ALG_FULLTEXT) ? + 0 : HA_READ_NEXT | HA_READ_PREV | HA_READ_RANGE | + HA_READ_ORDER | HA_KEYREAD_ONLY); + } + uint max_supported_keys() const { return MI_MAX_KEY; } + uint max_supported_key_length() const { return HA_MAX_KEY_LENGTH; } + uint max_supported_key_part_length() const { return HA_MAX_KEY_LENGTH; } + double scan_time() + { return ulonglong2double(stats.data_file_length) / IO_SIZE + file->tables; } + + int open(const char *name, int mode, uint test_if_locked); + int add_children_list(void); + int attach_children(void); + int detach_children(void); + virtual handler *clone(const char *name, MEM_ROOT *mem_root); + int close(void); + int write_row(const uchar * buf); + int update_row(const uchar * old_data, const uchar * new_data); + int delete_row(const uchar * buf); + int index_read_map(uchar *buf, const uchar *key, key_part_map keypart_map, + enum ha_rkey_function find_flag); + int index_read_idx_map(uchar *buf, uint index, const uchar *key, + key_part_map keypart_map, + enum ha_rkey_function find_flag); + int index_read_last_map(uchar *buf, const uchar *key, key_part_map keypart_map); + int index_next(uchar * buf); + int index_prev(uchar * buf); + int index_first(uchar * buf); + int index_last(uchar * buf); + int index_next_same(uchar *buf, const uchar *key, uint keylen); + int rnd_init(bool scan); + int rnd_next(uchar *buf); + int rnd_pos(uchar * buf, uchar *pos); + void position(const uchar *record); + ha_rows records_in_range(uint inx, const key_range *start_key, + const key_range *end_key, page_range *pages); + int delete_all_rows(); + int info(uint); + int reset(void); + int extra(enum ha_extra_function operation); + int extra_opt(enum ha_extra_function operation, ulong cache_size); + int external_lock(THD *thd, int lock_type); + uint lock_count(void) const; + int create_mrg(const char *name, HA_CREATE_INFO *create_info); + 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); + void update_create_info(HA_CREATE_INFO *create_info); + void append_create_info(String *packet); + MYRG_INFO *myrg_info() { return file; } + TABLE *table_ptr() { return table; } + enum_alter_inplace_result check_if_supported_inplace_alter(TABLE *, + Alter_inplace_info *); + bool inplace_alter_table(TABLE *altered_table, + Alter_inplace_info *ha_alter_info); + int check(THD* thd, HA_CHECK_OPT* check_opt); + ha_rows records(); + virtual uint count_query_cache_dependant_tables(uint8 *tables_type); + virtual my_bool + register_query_cache_dependant_tables(THD *thd, + Query_cache *cache, + Query_cache_block_table **block, + uint *n); + virtual void set_lock_type(enum thr_lock_type lock); +}; |