/* 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; ulonglong 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 ulonglong get_child_def_version() { return m_child_def_version; } inline void set_child_def_version(enum_table_ref_type child_table_ref_type, ulonglong 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) override; ulonglong table_flags() const override { 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 override { 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 override { return MI_MAX_KEY; } uint max_supported_key_length() const override { return HA_MAX_KEY_LENGTH; } uint max_supported_key_part_length() const override { return HA_MAX_KEY_LENGTH; } IO_AND_CPU_COST scan_time() override { IO_AND_CPU_COST cost; cost.io= (ulonglong2double(stats.data_file_length) / IO_SIZE + file->tables), cost.cpu= records() * ROW_NEXT_FIND_COST; return cost; } IO_AND_CPU_COST rnd_pos_time(ha_rows rows) override; IO_AND_CPU_COST keyread_time(uint index, ulong ranges, ha_rows rows, ulonglong blocks) override; int open(const char *name, int mode, uint test_if_locked) override; handler *clone(const char *name, MEM_ROOT *mem_root) override; int close(void) override; int write_row(const uchar * buf) override; int update_row(const uchar * old_data, const uchar * new_data) override; int delete_row(const uchar * buf) override; int index_read_map(uchar *buf, const uchar *key, key_part_map keypart_map, enum ha_rkey_function find_flag) override; int index_read_idx_map(uchar *buf, uint index, const uchar *key, key_part_map keypart_map, enum ha_rkey_function find_flag) override; int index_read_last_map(uchar *buf, const uchar *key, key_part_map keypart_map) override; int index_next(uchar * buf) override; int index_prev(uchar * buf) override; int index_first(uchar * buf) override; int index_last(uchar * buf) override; int index_next_same(uchar *buf, const uchar *key, uint keylen) override; int rnd_init(bool scan) override; int rnd_next(uchar *buf) override; int rnd_pos(uchar * buf, uchar *pos) override; void position(const uchar *record) override; ha_rows records_in_range(uint inx, const key_range *start_key, const key_range *end_key, page_range *pages) override; int delete_all_rows() override; int info(uint) override; int reset(void) override; int extra(enum ha_extra_function operation) override; int extra_opt(enum ha_extra_function operation, ulong cache_size) override; int external_lock(THD *thd, int lock_type) override; uint lock_count(void) const override; int create(const char *name, TABLE *form, HA_CREATE_INFO *create_info) override; THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to, enum thr_lock_type lock_type) override; void update_create_info(HA_CREATE_INFO *create_info) override; void append_create_info(String *packet) override; enum_alter_inplace_result check_if_supported_inplace_alter(TABLE *, Alter_inplace_info *) override; bool inplace_alter_table(TABLE *altered_table, Alter_inplace_info *ha_alter_info) override; int check(THD* thd, HA_CHECK_OPT* check_opt) override; ha_rows records() override; virtual uint count_query_cache_dependant_tables(uint8 *tables_type) override; virtual my_bool register_query_cache_dependant_tables(THD *thd, Query_cache *cache, Query_cache_block_table **block, uint *n) override; virtual void set_lock_type(enum thr_lock_type lock) override; /* Internal interface functions, not part of the normal handler interface */ int add_children_list(void); int attach_children(void); int detach_children(void); int create_mrg(const char *name, HA_CREATE_INFO *create_info); MYRG_INFO *myrg_info() { return file; } TABLE *table_ptr() { return table; } };