mirror of
https://github.com/MariaDB/server.git
synced 2025-11-04 04:46:15 +01:00
208 lines
8.1 KiB
C++
208 lines
8.1 KiB
C++
/*
|
|
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 */
|
|
|
|
/* 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();
|
|
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; }
|
|
|
|
/*
|
|
Make an exact copy an identifier on children_mem_root.
|
|
|
|
@param src - The original identifier
|
|
@return - {NULL,0} in case of EOM,
|
|
or a non-NULL LEX_STRING with the identifier copy.
|
|
*/
|
|
LEX_STRING make_child_ident(const LEX_CSTRING &src)
|
|
{
|
|
return lex_string_strmake_root(&children_mem_root, src.str, src.length);
|
|
}
|
|
|
|
/*
|
|
Make an exact copy or a lower-cased copy of an identifier
|
|
on children mem_root.
|
|
|
|
@param src - The original identifier
|
|
@param casedn - If the name should be converted to lower case
|
|
@return - {NULL,0} in case of EOM,
|
|
or a non-NULL LEX_STRING with the identifier copy.
|
|
*/
|
|
LEX_STRING make_child_ident_opt_casedn(const LEX_CSTRING &src, bool casedn)
|
|
{
|
|
return casedn ? lex_string_casedn_root(&children_mem_root,
|
|
&my_charset_utf8mb3_general_ci,
|
|
src.str, src.length) :
|
|
make_child_ident(src);
|
|
}
|
|
|
|
/*
|
|
Make an optionally lower-cases filename_to_tablename-decoded identifier
|
|
in children mem_root.
|
|
*/
|
|
LEX_STRING make_child_ident_filename_to_tablename(const char *src,
|
|
bool casedn)
|
|
{
|
|
char buf[NAME_LEN];
|
|
size_t len= filename_to_tablename(src, buf, sizeof(buf));
|
|
return make_child_ident_opt_casedn({buf, len}, casedn);
|
|
}
|
|
};
|