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25e2d0a6bb
Assertion `table->field[0]->ptr >= table->record[0] &&
table->field[0]->ptr <= table->record[0] + table->s->reclength' failed in
handler::assert_icp_limitations.
table->move_fields has some limitations:
1. It cannot be used in cascade
2. It should always have a restoring pair.
Rule 1 is covered by assertions in handler::assert_icp_limitations
and handler::ptr_in_record (commit 30894fe9a9).
Rule 2 should be manually maintained with care. Hopefully, the rule 1 assertions
may sometimes help as well.
In ha_myisam::repair, both rules are broken. table->move_fields is used
asymmetrically there: it is set on every param->fix_record call
(i.e. in compute_vcols) but is restored only once, in the end of repair.
The reason to updating field ptr's for every call is that compute_vcols can
(supposedly) be called in parallel, that is, with the same table, but different
records.
The condition to "unmove" the pointers in ha_myisam::restore_vcos_after_repair
is incorrect, when stored vcols are available, and myisam stores a VIRTUAL field
if it's the only field in the table (the record cannot be of zero length).
This patch solves the problem by "unmoving" the pointers symmetrically, in
compute_vcols. That is, both rules will be preserved maintained.
179 lines
7.8 KiB
C++
179 lines
7.8 KiB
C++
/*
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Copyright (c) 2000, 2012, Oracle and/or its affiliates.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
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#ifdef USE_PRAGMA_INTERFACE
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#pragma interface /* gcc class implementation */
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#endif
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/* class for the the myisam handler */
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#include <myisam.h>
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#include <ft_global.h>
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#include "handler.h" /* handler */
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#include "table.h" /* TABLE_SHARE */
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#define HA_RECOVER_DEFAULT 1 /* Automatic recover active */
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#define HA_RECOVER_BACKUP 2 /* Make a backupfile on recover */
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#define HA_RECOVER_FORCE 4 /* Recover even if we loose rows */
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#define HA_RECOVER_QUICK 8 /* Don't check rows in data file */
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#define HA_RECOVER_FULL_BACKUP 16 /* Make a copy of index file too */
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#define HA_RECOVER_OFF 32 /* No automatic recover */
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extern TYPELIB myisam_recover_typelib;
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extern const char *myisam_recover_names[];
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extern ulonglong myisam_recover_options;
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C_MODE_START
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check_result_t index_cond_func_myisam(void *arg);
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C_MODE_END
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class ha_myisam final : public handler
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{
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MI_INFO *file;
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ulonglong int_table_flags;
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char *data_file_name, *index_file_name;
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bool can_enable_indexes;
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int repair(THD *thd, HA_CHECK ¶m, bool optimize);
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void setup_vcols_for_repair(HA_CHECK *param);
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public:
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ha_myisam(handlerton *hton, TABLE_SHARE *table_arg);
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~ha_myisam() = default;
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handler *clone(const char *name, MEM_ROOT *mem_root) override;
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const char *index_type(uint key_number) override;
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ulonglong table_flags() const override { return int_table_flags; }
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int index_init(uint idx, bool sorted) override;
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int index_end() override;
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int rnd_end() override;
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ulong index_flags(uint inx, uint part, bool all_parts) const override;
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uint max_supported_keys() const override { return MI_MAX_KEY; }
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uint max_supported_key_parts() const override { return HA_MAX_KEY_SEG; }
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uint max_supported_key_length() const override { return HA_MAX_KEY_LENGTH; }
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uint max_supported_key_part_length() const override { return HA_MAX_KEY_LENGTH; }
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void change_table_ptr(TABLE *table_arg, TABLE_SHARE *share) override;
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int open(const char *name, int mode, uint test_if_locked) override;
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int close(void) override;
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int write_row(const uchar * buf) override;
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int update_row(const uchar * old_data, const uchar * new_data) override;
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int delete_row(const uchar * buf) override;
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int index_read_map(uchar *buf, const uchar *key, key_part_map keypart_map,
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enum ha_rkey_function find_flag) override;
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int index_read_idx_map(uchar *buf, uint index, const uchar *key,
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key_part_map keypart_map,
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enum ha_rkey_function find_flag) override;
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int index_next(uchar * buf) override;
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int index_prev(uchar * buf) override;
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int index_first(uchar * buf) override;
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int index_last(uchar * buf) override;
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int index_next_same(uchar *buf, const uchar *key, uint keylen) override;
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int ft_init() override
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{
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if (!ft_handler)
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return 1;
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ft_handler->please->reinit_search(ft_handler);
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return 0;
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}
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FT_INFO *ft_init_ext(uint flags, uint inx,String *key) override
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{
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return ft_init_search(flags,file,inx,
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(uchar *)key->ptr(), key->length(), key->charset(),
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table->record[0]);
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}
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int ft_read(uchar *buf) override;
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int rnd_init(bool scan) override;
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int rnd_next(uchar *buf) override;
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int rnd_pos(uchar * buf, uchar *pos) override;
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int remember_rnd_pos() override;
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int restart_rnd_next(uchar *buf) override;
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void position(const uchar *record) override;
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int info(uint) override;
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int extra(enum ha_extra_function operation) override;
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int extra_opt(enum ha_extra_function operation, ulong cache_size) override;
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int reset(void) override;
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int external_lock(THD *thd, int lock_type) override;
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int delete_all_rows(void) override;
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int reset_auto_increment(ulonglong value) override;
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int disable_indexes(key_map map, bool persist) override;
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int enable_indexes(key_map map, bool persist) override;
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int indexes_are_disabled(void) override;
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void start_bulk_insert(ha_rows rows, uint flags) override;
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int end_bulk_insert() override;
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ha_rows records_in_range(uint inx, const key_range *min_key,
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const key_range *max_key, page_range *pages) override;
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void update_create_info(HA_CREATE_INFO *create_info) override;
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int create(const char *name, TABLE *form, HA_CREATE_INFO *create_info) override;
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THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to,
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enum thr_lock_type lock_type) override;
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void get_auto_increment(ulonglong offset, ulonglong increment,
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ulonglong nb_desired_values,
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ulonglong *first_value,
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ulonglong *nb_reserved_values) override;
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int rename_table(const char * from, const char * to) override;
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int delete_table(const char *name) override;
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int check_for_upgrade(HA_CHECK_OPT *check_opt) override;
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int check(THD* thd, HA_CHECK_OPT* check_opt) override;
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int analyze(THD* thd,HA_CHECK_OPT* check_opt) override;
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int repair(THD* thd, HA_CHECK_OPT* check_opt) override;
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bool check_and_repair(THD *thd) override;
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bool is_crashed() const override;
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bool auto_repair(int error) const override
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{
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return (myisam_recover_options != HA_RECOVER_OFF &&
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error == HA_ERR_CRASHED_ON_USAGE);
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}
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int optimize(THD* thd, HA_CHECK_OPT* check_opt) override;
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int assign_to_keycache(THD* thd, HA_CHECK_OPT* check_opt) override;
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int preload_keys(THD* thd, HA_CHECK_OPT* check_opt) override;
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enum_alter_inplace_result check_if_supported_inplace_alter(TABLE *new_table,
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Alter_inplace_info *alter_info) override;
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bool check_if_incompatible_data(HA_CREATE_INFO *info, uint table_changes) override;
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#ifdef HAVE_QUERY_CACHE
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my_bool register_query_cache_table(THD *thd, const char *table_key,
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uint key_length,
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qc_engine_callback
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*engine_callback,
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ulonglong *engine_data) override;
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#endif
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MI_INFO *file_ptr(void)
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{
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return file;
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}
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public:
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/**
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* Multi Range Read interface
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*/
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int multi_range_read_init(RANGE_SEQ_IF *seq, void *seq_init_param,
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uint n_ranges, uint mode, HANDLER_BUFFER *buf) override;
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int multi_range_read_next(range_id_t *range_info) override;
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ha_rows multi_range_read_info_const(uint keyno, RANGE_SEQ_IF *seq,
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void *seq_init_param,
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uint n_ranges, uint *bufsz,
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uint *flags, Cost_estimate *cost) override;
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ha_rows multi_range_read_info(uint keyno, uint n_ranges, uint keys,
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uint key_parts, uint *bufsz,
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uint *flags, Cost_estimate *cost) override;
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int multi_range_read_explain_info(uint mrr_mode, char *str, size_t size) override;
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/* Index condition pushdown implementation */
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Item *idx_cond_push(uint keyno, Item* idx_cond) override;
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bool rowid_filter_push(Rowid_filter* rowid_filter) override;
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private:
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DsMrr_impl ds_mrr;
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friend check_result_t index_cond_func_myisam(void *arg);
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};
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