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drwxr-xr-x
2025-12-08 12:32
aligned.h
1.11
KB
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2025-11-28 17:05
aria_backup.h
1.51
KB
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2025-11-28 17:05
assume_aligned.h
2.29
KB
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2025-11-28 17:05
authors.h
9.9
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2025-11-28 17:05
backup.h
1.66
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2025-11-28 17:05
bounded_queue.h
5.95
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2025-11-28 17:05
client_settings.h
1.89
KB
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2025-11-28 17:05
compat56.h
2.23
KB
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2025-11-28 17:05
config.h
14.23
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2025-11-28 17:05
contributors.h
4.76
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2025-11-28 17:05
create_options.h
4.42
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2025-11-28 17:05
create_tmp_table.h
2.74
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2025-11-28 17:05
cset_narrowing.h
3.88
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2025-11-28 17:05
custom_conf.h
1.06
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2025-11-28 17:05
datadict.h
1.66
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2025-11-28 17:05
ddl_log.h
12.39
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2025-11-28 17:05
debug.h
1.21
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2025-11-28 17:05
debug_sync.h
2
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2025-11-28 17:05
derived_handler.h
2.32
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2025-11-28 17:05
derror.h
980
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2025-11-28 17:05
des_key_file.h
1.21
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2025-11-28 17:05
discover.h
1.53
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2025-11-28 17:05
dur_prop.h
1.06
KB
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2025-11-28 17:05
embedded_priv.h
1.69
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2025-11-28 17:05
event_data_objects.h
4.09
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2025-11-28 17:05
event_db_repository.h
3.56
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2025-11-28 17:05
event_parse_data.h
2.83
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2025-11-28 17:05
event_queue.h
3.36
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2025-11-28 17:05
event_scheduler.h
3.21
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2025-11-28 17:05
events.h
4.59
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2025-11-28 17:05
field.h
215.59
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2025-11-28 17:05
field_comp.h
1.15
KB
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2025-11-28 17:05
filesort.h
7.11
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2025-11-28 17:05
filesort_utils.h
8
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2025-11-28 17:05
ft_global.h
3.04
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2025-11-28 17:05
gcalc_slicescan.h
16.87
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2025-11-28 17:05
gcalc_tools.h
11.62
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2025-11-28 17:05
grant.h
2.69
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2025-11-28 17:05
group_by_handler.h
3.45
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2025-11-28 17:05
gstream.h
2.38
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2025-11-28 17:05
ha_handler_stats.h
2.28
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2025-11-28 17:05
ha_partition.h
62.8
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2025-11-28 17:05
ha_sequence.h
6.1
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2025-11-28 17:05
handle_connections_win.h
884
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2025-11-28 17:05
handler.h
196.93
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2025-11-28 17:05
hash.h
4.34
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2025-11-28 17:05
hash_filo.h
5.55
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2025-11-28 17:05
heap.h
9.26
KB
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2025-11-28 17:05
hostname.h
5.29
KB
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2025-11-28 17:05
ilist.h
6.88
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2025-11-28 17:05
init.h
852
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2025-11-28 17:05
innodb_priv.h
1.29
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2025-11-28 17:05
item.h
272.73
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2025-11-28 17:05
item_cmpfunc.h
131.86
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2025-11-28 17:05
item_create.h
11.23
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2025-11-28 17:05
item_func.h
133.71
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2025-11-28 17:05
item_geofunc.h
37.99
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2025-11-28 17:05
item_jsonfunc.h
21.99
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2025-11-28 17:05
item_row.h
5.1
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2025-11-28 17:05
item_strfunc.h
70.55
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2025-11-28 17:05
item_subselect.h
57.77
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2025-11-28 17:05
item_sum.h
70.59
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2025-11-28 17:05
item_timefunc.h
63.46
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2025-11-28 17:05
item_vers.h
4.23
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2025-11-28 17:05
item_windowfunc.h
33.51
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2025-11-28 17:05
item_xmlfunc.h
4.5
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2025-11-28 17:05
json_table.h
9.28
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2025-11-28 17:05
key.h
2.08
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2025-11-28 17:05
keycaches.h
1.95
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2025-11-28 17:05
lex.h
29.13
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2025-11-28 17:05
lex_string.h
3.97
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2025-11-28 17:05
lex_symbol.h
1.29
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2025-11-28 17:05
lf.h
6.31
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2025-11-28 17:05
lock.h
2.15
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2025-11-28 17:05
log.h
45
KB
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2025-11-28 17:05
log_event.h
182.04
KB
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2025-11-28 17:05
log_event_data_type.h
1.85
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2025-11-28 17:05
log_event_old.h
19.37
KB
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2025-11-28 17:05
log_slow.h
2.38
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2025-11-28 17:05
maria.h
5.73
KB
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2025-11-28 17:05
mariadb.h
1.25
KB
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2025-11-28 17:05
mdl.h
37.57
KB
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2025-11-28 17:05
mem_root_array.h
6.94
KB
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2025-11-28 17:05
message.h
1.17
KB
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2025-11-28 17:05
multi_range_read.h
22.64
KB
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2025-11-28 17:05
my_alarm.h
2.37
KB
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2025-11-28 17:05
my_apc.h
4.64
KB
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2025-11-28 17:05
my_atomic.h
7.11
KB
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2025-11-28 17:05
my_atomic_wrapper.h
2.98
KB
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2025-11-28 17:05
my_base.h
26.57
KB
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2025-11-28 17:05
my_bit.h
6.05
KB
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2025-11-28 17:05
my_bitmap.h
5.74
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2025-11-28 17:05
my_check_opt.h
2.56
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2025-11-28 17:05
my_compare.h
10.93
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2025-11-28 17:05
my_counter.h
1.68
KB
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2025-11-28 17:05
my_cpu.h
4.74
KB
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2025-11-28 17:05
my_crypt.h
904
B
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2025-11-28 17:05
my_decimal.h
14.15
KB
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2025-11-28 17:05
my_default.h
1.84
KB
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2025-11-28 17:05
my_handler_errors.h
4.77
KB
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2025-11-28 17:05
my_json_writer.h
17.95
KB
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2025-11-28 17:05
my_libwrap.h
1.16
KB
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2025-11-28 17:05
my_md5.h
1.45
KB
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2025-11-28 17:05
my_minidump.h
848
B
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2025-11-28 17:05
my_nosys.h
1.4
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2025-11-28 17:05
my_rdtsc.h
8.23
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2025-11-28 17:05
my_rnd.h
1.04
KB
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2025-11-28 17:05
my_service_manager.h
2
KB
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2025-11-28 17:05
my_stack_alloc.h
6.34
KB
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2025-11-28 17:05
my_stacktrace.h
3.14
KB
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2025-11-28 17:05
my_time.h
10.17
KB
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2025-11-28 17:05
my_tree.h
3.9
KB
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2025-11-28 17:05
my_uctype.h
67.9
KB
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2025-11-28 17:05
my_user.h
1.1
KB
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2025-11-28 17:05
myisam.h
17.1
KB
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2025-11-28 17:05
myisamchk.h
4.61
KB
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2025-11-28 17:05
myisammrg.h
4.78
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2025-11-28 17:05
myisampack.h
14.58
KB
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2025-11-28 17:05
mysqld.h
39.55
KB
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2025-11-28 17:05
mysqld_default_groups.h
204
B
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2025-11-28 17:05
mysqld_suffix.h
1.17
KB
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2025-11-28 17:05
mysys_err.h
2.95
KB
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2025-11-28 17:05
opt_range.h
58.19
KB
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2025-11-28 17:05
opt_subselect.h
14.21
KB
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2025-11-28 17:05
opt_trace.h
8.29
KB
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2025-11-28 17:05
opt_trace_context.h
3.21
KB
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2025-11-28 17:05
parse_file.h
4.28
KB
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2025-11-28 17:05
partition_element.h
5.09
KB
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2025-11-28 17:05
partition_info.h
18.85
KB
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2025-11-28 17:05
password.h
1.14
KB
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2025-11-28 17:05
pfs_file_provider.h
3.08
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2025-11-28 17:05
pfs_idle_provider.h
1.35
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2025-11-28 17:05
pfs_memory_provider.h
1.59
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2025-11-28 17:05
pfs_metadata_provider.h
1.85
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2025-11-28 17:05
pfs_socket_provider.h
2.21
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2025-11-28 17:05
pfs_stage_provider.h
1.52
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2025-11-28 17:05
pfs_statement_provider.h
4.25
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2025-11-28 17:05
pfs_table_provider.h
2.56
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2025-11-28 17:05
pfs_thread_provider.h
5.43
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2025-11-28 17:05
pfs_transaction_provider.h
2.78
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2025-11-28 17:05
privilege.h
27.97
KB
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2025-11-28 17:05
probes_mysql.h
973
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2025-11-28 17:05
probes_mysql_dtrace.h
32.23
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2025-11-28 17:05
probes_mysql_nodtrace.h
4.89
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2025-11-28 17:05
procedure.h
6.63
KB
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2025-11-28 17:05
protocol.h
12.2
KB
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2025-11-28 17:05
proxy_protocol.h
548
B
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2025-11-28 17:05
queues.h
3.4
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2025-11-28 17:05
records.h
3.07
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2025-11-28 17:05
repl_failsafe.h
1.55
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2025-11-28 17:05
replication.h
15.73
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2025-11-28 17:05
rijndael.h
1.67
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2025-11-28 17:05
rowid_filter.h
15.11
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2025-11-28 17:05
rpl_constants.h
3.28
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2025-11-28 17:05
rpl_filter.h
4.43
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2025-11-28 17:05
rpl_gtid.h
13.36
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2025-11-28 17:05
rpl_injector.h
9.4
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2025-11-28 17:05
rpl_mi.h
14.64
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2025-11-28 17:05
rpl_parallel.h
17.05
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2025-11-28 17:05
rpl_record.h
1.55
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2025-11-28 17:05
rpl_record_old.h
1.37
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2025-11-28 17:05
rpl_reporting.h
3.63
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2025-11-28 17:05
rpl_rli.h
31.98
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2025-11-28 17:05
rpl_tblmap.h
3.1
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2025-11-28 17:05
rpl_utility.h
9.4
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2025-11-28 17:05
scheduler.h
3.12
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2025-11-28 17:05
scope.h
4.29
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2025-11-28 17:05
select_handler.h
2.18
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2025-11-28 17:05
semisync.h
2.23
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2025-11-28 17:05
semisync_master.h
25.16
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2025-11-28 17:05
semisync_master_ack_receiver.h
8.5
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2025-11-28 17:05
semisync_slave.h
3.65
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2025-11-28 17:05
service_versions.h
2
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2025-11-28 17:05
session_tracker.h
13.94
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2025-11-28 17:05
set_var.h
16.16
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2025-11-28 17:05
slave.h
11.99
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2025-11-28 17:05
socketpair.h
842
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2025-11-28 17:05
source_revision.h
67
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2025-11-28 17:05
sp.h
22.06
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2025-11-28 17:05
sp_cache.h
2
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2025-11-28 17:05
sp_head.h
63
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2025-11-28 17:05
sp_pcontext.h
24.31
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2025-11-28 17:05
sp_rcontext.h
14
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2025-11-28 17:05
span.h
3.84
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2025-11-28 17:05
spatial.h
21.78
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2025-11-28 17:05
sql_acl.h
13.8
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2025-11-28 17:05
sql_admin.h
2.85
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2025-11-28 17:05
sql_alloc.h
1.69
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2025-11-28 17:05
sql_alter.h
14.92
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2025-11-28 17:05
sql_analyse.h
10.86
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2025-11-28 17:05
sql_analyze_stmt.h
12.38
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2025-11-28 17:05
sql_array.h
6.71
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2025-11-28 17:05
sql_audit.h
13.62
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2025-11-28 17:05
sql_base.h
25.27
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2025-11-28 17:05
sql_basic_types.h
9.3
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2025-11-28 17:05
sql_binlog.h
895
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sql_bitmap.h
7.66
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2025-11-28 17:05
sql_bootstrap.h
1.77
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2025-11-28 17:05
sql_cache.h
21.17
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2025-11-28 17:05
sql_callback.h
1.51
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2025-11-28 17:05
sql_class.h
261.16
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2025-11-28 17:05
sql_cmd.h
9.2
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2025-11-28 17:05
sql_connect.h
3.99
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2025-11-28 17:05
sql_const.h
10.96
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2025-11-28 17:05
sql_crypt.h
1.4
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2025-11-28 17:05
sql_cte.h
16.15
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2025-11-28 17:05
sql_cursor.h
2.26
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2025-11-28 17:05
sql_db.h
2.38
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2025-11-28 17:05
sql_debug.h
5.51
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2025-11-28 17:05
sql_delete.h
1.31
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2025-11-28 17:05
sql_derived.h
1.26
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2025-11-28 17:05
sql_digest.h
3.73
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2025-11-28 17:05
sql_digest_stream.h
1.53
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2025-11-28 17:05
sql_do.h
954
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2025-11-28 17:05
sql_error.h
38.66
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2025-11-28 17:05
sql_explain.h
28.34
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2025-11-28 17:05
sql_expression_cache.h
4.26
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2025-11-28 17:05
sql_get_diagnostics.h
7.68
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2025-11-28 17:05
sql_handler.h
2.84
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2025-11-28 17:05
sql_help.h
995
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2025-11-28 17:05
sql_hset.h
3.32
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2025-11-28 17:05
sql_i_s.h
8.04
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2025-11-28 17:05
sql_insert.h
2.59
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2025-11-28 17:05
sql_join_cache.h
47.53
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2025-11-28 17:05
sql_lex.h
168.5
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Rename
/* Copyright 2006-2008 MySQL AB, 2008 Sun Microsystems, Inc. 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 */ #ifndef SQL_STATISTICS_H #define SQL_STATISTICS_H /* For COMPLEMENTARY_FOR_QUERIES and PREFERABLY_FOR_QUERIES they are similar to the COMPLEMENTARY and PREFERABLY respectively except that with these values we would not be collecting EITS for queries like ANALYZE TABLE t1; To collect EITS with these values, we have to use PERSISITENT FOR analyze table t1 persistent for columns (col1,col2...) index (idx1, idx2...) or analyze table t1 persistent for all */ typedef enum enum_use_stat_tables_mode { NEVER, COMPLEMENTARY, PREFERABLY, COMPLEMENTARY_FOR_QUERIES, PREFERABLY_FOR_QUERIES } Use_stat_tables_mode; typedef enum enum_histogram_type { SINGLE_PREC_HB, DOUBLE_PREC_HB } Histogram_type; enum enum_stat_tables { TABLE_STAT, COLUMN_STAT, INDEX_STAT, }; /* These enumeration types comprise the dictionary of three statistical tables table_stat, column_stat and index_stat as they defined in ../scripts/mysql_system_tables.sql. It would be nice if the declarations of these types were generated automatically by the table definitions. */ enum enum_table_stat_col { TABLE_STAT_DB_NAME, TABLE_STAT_TABLE_NAME, TABLE_STAT_CARDINALITY, TABLE_STAT_N_FIELDS }; enum enum_column_stat_col { COLUMN_STAT_DB_NAME, COLUMN_STAT_TABLE_NAME, COLUMN_STAT_COLUMN_NAME, COLUMN_STAT_MIN_VALUE, COLUMN_STAT_MAX_VALUE, COLUMN_STAT_NULLS_RATIO, COLUMN_STAT_AVG_LENGTH, COLUMN_STAT_AVG_FREQUENCY, COLUMN_STAT_HIST_SIZE, COLUMN_STAT_HIST_TYPE, COLUMN_STAT_HISTOGRAM, COLUMN_STAT_N_FIELDS }; enum enum_index_stat_col { INDEX_STAT_DB_NAME, INDEX_STAT_TABLE_NAME, INDEX_STAT_INDEX_NAME, INDEX_STAT_PREFIX_ARITY, INDEX_STAT_AVG_FREQUENCY, INDEX_STAT_N_FIELDS }; inline Use_stat_tables_mode get_use_stat_tables_mode(THD *thd) { return (Use_stat_tables_mode) (thd->variables.use_stat_tables); } inline bool check_eits_collection_allowed(THD *thd) { return (get_use_stat_tables_mode(thd) == COMPLEMENTARY || get_use_stat_tables_mode(thd) == PREFERABLY); } inline bool check_eits_preferred(THD *thd) { return (get_use_stat_tables_mode(thd) == PREFERABLY || get_use_stat_tables_mode(thd) == PREFERABLY_FOR_QUERIES); } int read_statistics_for_tables_if_needed(THD *thd, TABLE_LIST *tables); int read_statistics_for_tables(THD *thd, TABLE_LIST *tables, bool force_reload); int collect_statistics_for_table(THD *thd, TABLE *table); int alloc_statistics_for_table(THD *thd, TABLE *table, MY_BITMAP *stat_fields); int update_statistics_for_table(THD *thd, TABLE *table); int delete_statistics_for_table(THD *thd, const LEX_CSTRING *db, const LEX_CSTRING *tab); int delete_statistics_for_column(THD *thd, TABLE *tab, Field *col); int delete_statistics_for_index(THD *thd, TABLE *tab, KEY *key_info, bool ext_prefixes_only); int rename_table_in_stat_tables(THD *thd, const LEX_CSTRING *db, const LEX_CSTRING *tab, const LEX_CSTRING *new_db, const LEX_CSTRING *new_tab); int rename_columns_in_stat_table(THD *thd, TABLE *tab, List<Alter_info::RENAME_COLUMN_STAT_PARAMS> *fields); int rename_indexes_in_stat_table(THD *thd, TABLE *tab, List<Alter_info::RENAME_INDEX_STAT_PARAMS> *indexes); void set_statistics_for_table(THD *thd, TABLE *table); double get_column_avg_frequency(Field * field); double get_column_range_cardinality(Field *field, key_range *min_endp, key_range *max_endp, uint range_flag); bool is_stat_table(const LEX_CSTRING *db, LEX_CSTRING *table); bool is_eits_usable(Field* field); class Histogram { private: Histogram_type type; uint8 size; /* Size of values array, in bytes */ uchar *values; uint prec_factor() { switch (type) { case SINGLE_PREC_HB: return ((uint) (1 << 8) - 1); case DOUBLE_PREC_HB: return ((uint) (1 << 16) - 1); } return 1; } public: uint get_width() { switch (type) { case SINGLE_PREC_HB: return size; case DOUBLE_PREC_HB: return size / 2; } return 0; } private: uint get_value(uint i) { DBUG_ASSERT(i < get_width()); switch (type) { case SINGLE_PREC_HB: return (uint) (((uint8 *) values)[i]); case DOUBLE_PREC_HB: return (uint) uint2korr(values + i * 2); } return 0; } /* Find the bucket which value 'pos' falls into. */ uint find_bucket(double pos, bool first) { uint val= (uint) (pos * prec_factor()); int lp= 0; int rp= get_width() - 1; int d= get_width() / 2; uint i= lp + d; for ( ; d; d= (rp - lp) / 2, i= lp + d) { if (val == get_value(i)) break; if (val < get_value(i)) rp= i; else if (val > get_value(i + 1)) lp= i + 1; else break; } if (val > get_value(i) && i < (get_width() - 1)) i++; if (val == get_value(i)) { if (first) { while(i && val == get_value(i - 1)) i--; } else { while(i + 1 < get_width() && val == get_value(i + 1)) i++; } } return i; } public: uint get_size() { return (uint) size; } Histogram_type get_type() { return type; } uchar *get_values() { return (uchar *) values; } void set_size (ulonglong sz) { size= (uint8) sz; } void set_type (Histogram_type t) { type= t; } void set_values (uchar *vals) { values= (uchar *) vals; } bool is_available() { return get_size() > 0 && get_values(); } /* This function checks that histograms should be usable only when 1) the level of optimizer_use_condition_selectivity > 3 2) histograms have been collected */ bool is_usable(THD *thd) { return thd->variables.optimizer_use_condition_selectivity > 3 && is_available(); } void set_value(uint i, double val) { switch (type) { case SINGLE_PREC_HB: ((uint8 *) values)[i]= (uint8) (val * prec_factor()); return; case DOUBLE_PREC_HB: int2store(values + i * 2, val * prec_factor()); return; } } void set_prev_value(uint i) { switch (type) { case SINGLE_PREC_HB: ((uint8 *) values)[i]= ((uint8 *) values)[i-1]; return; case DOUBLE_PREC_HB: int2store(values + i * 2, uint2korr(values + i * 2 - 2)); return; } } double range_selectivity(double min_pos, double max_pos) { double sel; double bucket_sel= 1.0/(get_width() + 1); uint min= find_bucket(min_pos, TRUE); uint max= find_bucket(max_pos, FALSE); sel= bucket_sel * (max - min + 1); return sel; } /* Estimate selectivity of "col=const" using a histogram */ double point_selectivity(double pos, double avg_sel); }; class Columns_statistics; class Index_statistics; /* Statistical data on a table */ class Table_statistics { public: my_bool cardinality_is_null; /* TRUE if the cardinality is unknown */ ha_rows cardinality; /* Number of rows in the table */ uchar *min_max_record_buffers; /* Record buffers for min/max values */ Column_statistics *column_stats; /* Array of statistical data for columns */ Index_statistics *index_stats; /* Array of statistical data for indexes */ /* Array of records per key for index prefixes */ ulonglong *idx_avg_frequency; uchar *histograms; /* Sequence of histograms */ }; /* Statistical data on a column Note: objects of this class may be "empty", where they have almost all fields as zeros, for example, get_avg_frequency() will return 0. objects are allocated in alloc_statistics_for_table[_share]. */ class Column_statistics { private: static const uint Scale_factor_nulls_ratio= 100000; static const uint Scale_factor_avg_length= 100000; static const uint Scale_factor_avg_frequency= 100000; public: /* Bitmap indicating what statistical characteristics are available for the column */ uint32 column_stat_nulls; /* For the below two, see comments in get_column_range_cardinality() */ /* Minimum value for the column */ Field *min_value; /* Maximum value for the column */ Field *max_value; private: /* The ratio Z/N multiplied by the scale factor Scale_factor_nulls_ratio, where N is the total number of rows, Z is the number of nulls in the column */ ulong nulls_ratio; /* Average number of bytes occupied by the representation of a value of the column in memory buffers such as join buffer multiplied by the scale factor Scale_factor_avg_length. CHAR values are stripped of trailing spaces. Flexible values are stripped of their length prefixes. */ ulonglong avg_length; /* The ratio N/D multiplied by the scale factor Scale_factor_avg_frequency, where N is the number of rows with not null value in the column, D the number of distinct values among them */ ulonglong avg_frequency; public: Histogram histogram; uint32 no_values_provided_bitmap() { return ((1 << (COLUMN_STAT_HISTOGRAM-COLUMN_STAT_COLUMN_NAME))-1) << (COLUMN_STAT_COLUMN_NAME+1); } void set_all_nulls() { column_stat_nulls= no_values_provided_bitmap(); } void set_not_null(uint stat_field_no) { column_stat_nulls&= ~(1 << stat_field_no); } bool is_null(uint stat_field_no) { return MY_TEST(column_stat_nulls & (1 << stat_field_no)); } double get_nulls_ratio() { return (double) nulls_ratio / Scale_factor_nulls_ratio; } double get_avg_length() { return (double) avg_length / Scale_factor_avg_length; } double get_avg_frequency() { return (double) avg_frequency / Scale_factor_avg_frequency; } void set_nulls_ratio (double val) { nulls_ratio= (ulong) (val * Scale_factor_nulls_ratio); } void set_avg_length (double val) { avg_length= (ulonglong) (val * Scale_factor_avg_length); } void set_avg_frequency (double val) { avg_frequency= (ulonglong) (val * Scale_factor_avg_frequency); } bool min_max_values_are_provided() { return !is_null(COLUMN_STAT_MIN_VALUE) && !is_null(COLUMN_STAT_MAX_VALUE); } /* This function checks whether the values for the fields of the statistical tables that were NULL by DEFAULT for a column have changed or not. @retval TRUE: Statistics are not present for a column FALSE: Statisitics are present for a column */ bool no_stat_values_provided() { return (column_stat_nulls == no_values_provided_bitmap()); } }; /* Statistical data on an index prefixes */ class Index_statistics { private: static const uint Scale_factor_avg_frequency= 100000; /* The k-th element of this array contains the ratio N/D multiplied by the scale factor Scale_factor_avg_frequency, where N is the number of index entries without nulls in the first k components, and D is the number of distinct k-component prefixes among them */ ulonglong *avg_frequency; public: void init_avg_frequency(ulonglong *ptr) { avg_frequency= ptr; } bool avg_frequency_is_inited() { return avg_frequency != NULL; } double get_avg_frequency(uint i) const { return (double) avg_frequency[i] / Scale_factor_avg_frequency; } void set_avg_frequency(uint i, double val) { avg_frequency[i]= (ulonglong) (val * Scale_factor_avg_frequency); } }; #endif /* SQL_STATISTICS_H */