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+/*
+ 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);
+};