1
drop table if exists t1,t2;
2
set @my_binlog_cache_size =@@global.binlog_cache_size;
3
set @my_connect_timeout =@@global.connect_timeout;
4
set @my_delayed_insert_timeout =@@global.delayed_insert_timeout;
5
set @my_delayed_queue_size =@@global.delayed_queue_size;
6
set @my_flush =@@global.flush;
7
set @my_flush_time =@@global.flush_time;
8
set @my_key_buffer_size =@@global.key_buffer_size;
9
set @my_max_binlog_cache_size =@@global.max_binlog_cache_size;
10
set @my_max_binlog_size =@@global.max_binlog_size;
11
set @my_max_connect_errors =@@global.max_connect_errors;
12
set @my_max_connections =@@global.max_connections;
13
set @my_max_delayed_threads =@@global.max_delayed_threads;
14
set @my_max_heap_table_size =@@global.max_heap_table_size;
15
set @my_max_insert_delayed_threads=@@global.max_insert_delayed_threads;
16
set @my_max_join_size =@@global.max_join_size;
17
set @my_myisam_data_pointer_size =@@global.myisam_data_pointer_size;
18
set @my_net_buffer_length =@@global.net_buffer_length;
19
set @my_net_write_timeout =@@global.net_write_timeout;
20
set @my_net_read_timeout =@@global.net_read_timeout;
21
set @my_query_cache_limit =@@global.query_cache_limit;
22
set @my_query_cache_type =@@global.query_cache_type;
23
set @my_rpl_recovery_rank =@@global.rpl_recovery_rank;
24
set @my_server_id =@@global.server_id;
25
set @my_slow_launch_time =@@global.slow_launch_time;
26
set @my_storage_engine =@@global.storage_engine;
27
set @my_thread_cache_size =@@global.thread_cache_size;
29
select @test, @`test`, @TEST, @`TEST`, @"teSt";
30
@test @`test` @TEST @`TEST` @"teSt"
33
select @test, @`test`, @TEST, @`TEST`, @"teSt";
34
@test @`test` @TEST @`TEST` @"teSt"
37
select @test, @`test`, @TEST, @`TEST`, @"teSt";
38
@test @`test` @TEST @`TEST` @"teSt"
41
select @test, @`test`, @TEST, @`TEST`, @"teSt";
42
@test @`test` @TEST @`TEST` @"teSt"
47
select @test, @`test`, @TEST, @`TEST`, @"teSt";
48
@test @`test` @TEST @`TEST` @"teSt"
50
set @select=2,@t5=1.23456;
51
select @`select`,@not_used;
54
set @test_int=10,@test_double=1e-10,@test_string="abcdeghi",@test_string2="abcdefghij",@select=NULL;
55
select @test_int,@test_double,@test_string,@test_string2,@select;
56
@test_int @test_double @test_string @test_string2 @select
57
10 0.0000000001 abcdeghi abcdefghij NULL
58
set @test_int="hello",@test_double="hello",@test_string="hello",@test_string2="hello";
59
select @test_int,@test_double,@test_string,@test_string2;
60
@test_int @test_double @test_string @test_string2
61
hello hello hello hello
62
set @test_int="hellohello",@test_double="hellohello",@test_string="hellohello",@test_string2="hellohello";
63
select @test_int,@test_double,@test_string,@test_string2;
64
@test_int @test_double @test_string @test_string2
65
hellohello hellohello hellohello hellohello
66
set @test_int=null,@test_double=null,@test_string=null,@test_string2=null;
67
select @test_int,@test_double,@test_string,@test_string2;
68
@test_int @test_double @test_string @test_string2
70
select @t1:=(@t2:=1)+@t3:=4,@t1,@t2,@t3;
71
@t1:=(@t2:=1)+@t3:=4 @t1 @t2 @t3
73
explain extended select @t1:=(@t2:=1)+@t3:=4,@t1,@t2,@t3;
74
id select_type table type possible_keys key key_len ref rows filtered Extra
75
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
77
Note 1003 select (@t1:=((@t2:=1) + (@t3:=4))) AS `@t1:=(@t2:=1)+@t3:=4`,(@t1) AS `@t1`,(@t2) AS `@t2`,(@t3) AS `@t3`
81
CREATE TABLE t1 (c_id INT(4) NOT NULL, c_name CHAR(20), c_country CHAR(3), PRIMARY KEY(c_id));
82
INSERT INTO t1 VALUES (1,'Bozo','USA'),(2,'Ronald','USA'),(3,'Kinko','IRE'),(4,'Mr. Floppy','GB');
83
SELECT @min_cid:=min(c_id), @max_cid:=max(c_id) from t1;
84
@min_cid:=min(c_id) @max_cid:=max(c_id)
86
SELECT * FROM t1 WHERE c_id=@min_cid OR c_id=@max_cid;
90
SELECT * FROM t1 WHERE c_id=@min_cid OR c_id=@max_cid OR c_id=666;
94
ALTER TABLE t1 DROP PRIMARY KEY;
95
select * from t1 where c_id=@min_cid OR c_id=@max_cid;
100
set GLOBAL max_join_size=10;
101
set max_join_size=100;
102
show variables like 'max_join_size';
105
select * from information_schema.session_variables where variable_name like 'max_join_size';
106
VARIABLE_NAME VARIABLE_VALUE
108
show global variables like 'max_join_size';
111
select * from information_schema.global_variables where variable_name like 'max_join_size';
112
VARIABLE_NAME VARIABLE_VALUE
114
set GLOBAL max_join_size=2000;
115
show global variables like 'max_join_size';
118
select * from information_schema.global_variables where variable_name like 'max_join_size';
119
VARIABLE_NAME VARIABLE_VALUE
121
set max_join_size=DEFAULT;
122
show variables like 'max_join_size';
125
select * from information_schema.session_variables where variable_name like 'max_join_size';
126
VARIABLE_NAME VARIABLE_VALUE
128
set GLOBAL max_join_size=DEFAULT;
129
show global variables like 'max_join_size';
131
max_join_size HA_POS_ERROR
132
select * from information_schema.global_variables where variable_name like 'max_join_size';
133
VARIABLE_NAME VARIABLE_VALUE
134
MAX_JOIN_SIZE HA_POS_ERROR
135
set @@max_join_size=1000, @@global.max_join_size=2000;
136
select @@local.max_join_size, @@global.max_join_size;
137
@@local.max_join_size @@global.max_join_size
139
select @@identity, length(@@version)>0;
140
@@identity length(@@version)>0
142
select @@VERSION=version();
145
select last_insert_id(345);
148
explain extended select last_insert_id(345);
149
id select_type table type possible_keys key key_len ref rows filtered Extra
150
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
152
Note 1003 select last_insert_id(345) AS `last_insert_id(345)`
153
select @@IDENTITY,last_insert_id(), @@identity;
154
@@IDENTITY last_insert_id() @@identity
156
explain extended select @@IDENTITY,last_insert_id(), @@identity;
157
id select_type table type possible_keys key key_len ref rows filtered Extra
158
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
160
Note 1003 select 345 AS `@@IDENTITY`,last_insert_id() AS `last_insert_id()`,345 AS `@@identity`
161
set big_tables=OFF, big_tables=ON, big_tables=0, big_tables=1, big_tables="OFF", big_tables="ON";
162
set global concurrent_insert=2;
163
show variables like 'concurrent_insert';
166
select * from information_schema.session_variables where variable_name like 'concurrent_insert';
167
VARIABLE_NAME VARIABLE_VALUE
169
set global concurrent_insert=1;
170
show variables like 'concurrent_insert';
173
select * from information_schema.session_variables where variable_name like 'concurrent_insert';
174
VARIABLE_NAME VARIABLE_VALUE
176
set global concurrent_insert=0;
177
show variables like 'concurrent_insert';
180
select * from information_schema.session_variables where variable_name like 'concurrent_insert';
181
VARIABLE_NAME VARIABLE_VALUE
183
set global concurrent_insert=DEFAULT;
184
select @@concurrent_insert;
187
set global timed_mutexes=ON;
188
show variables like 'timed_mutexes';
191
select * from information_schema.session_variables where variable_name like 'timed_mutexes';
192
VARIABLE_NAME VARIABLE_VALUE
194
set global timed_mutexes=0;
195
show variables like 'timed_mutexes';
198
select * from information_schema.session_variables where variable_name like 'timed_mutexes';
199
VARIABLE_NAME VARIABLE_VALUE
201
set storage_engine=MYISAM, storage_engine="HEAP";
202
show local variables like 'storage_engine';
204
storage_engine MEMORY
205
select * from information_schema.session_variables where variable_name like 'storage_engine';
206
VARIABLE_NAME VARIABLE_VALUE
207
STORAGE_ENGINE MEMORY
208
show global variables like 'storage_engine';
210
storage_engine MyISAM
211
select * from information_schema.global_variables where variable_name like 'storage_engine';
212
VARIABLE_NAME VARIABLE_VALUE
213
STORAGE_ENGINE MyISAM
214
set GLOBAL query_cache_size=100000;
215
set GLOBAL myisam_max_sort_file_size=2000000;
216
show global variables like 'myisam_max_sort_file_size';
218
myisam_max_sort_file_size 1048576
219
select * from information_schema.global_variables where variable_name like 'myisam_max_sort_file_size';
220
VARIABLE_NAME VARIABLE_VALUE
221
MYISAM_MAX_SORT_FILE_SIZE 1048576
222
set GLOBAL myisam_max_sort_file_size=default;
223
show global variables like 'myisam_max_sort_file_size';
225
myisam_max_sort_file_size FILE_SIZE
226
select * from information_schema.global_variables where variable_name like 'myisam_max_sort_file_size';
227
VARIABLE_NAME VARIABLE_VALUE
228
MYISAM_MAX_SORT_FILE_SIZE FILE_SIZE
229
set global net_retry_count=10, session net_retry_count=10;
230
set global net_buffer_length=1024, net_write_timeout=200, net_read_timeout=300;
231
set session net_buffer_length=2048, net_write_timeout=500, net_read_timeout=600;
232
show global variables like 'net_%';
234
net_buffer_length 1024
237
net_write_timeout 200
238
select * from information_schema.global_variables where variable_name like 'net_%' order by 1;
239
VARIABLE_NAME VARIABLE_VALUE
240
NET_BUFFER_LENGTH 1024
243
NET_WRITE_TIMEOUT 200
244
show session variables like 'net_%';
246
net_buffer_length 2048
249
net_write_timeout 500
250
select * from information_schema.session_variables where variable_name like 'net_%' order by 1;
251
VARIABLE_NAME VARIABLE_VALUE
252
NET_BUFFER_LENGTH 2048
255
NET_WRITE_TIMEOUT 500
256
set session net_buffer_length=8000, global net_read_timeout=900, net_write_timeout=1000;
257
show global variables like 'net_%';
259
net_buffer_length 1024
262
net_write_timeout 1000
263
select * from information_schema.global_variables where variable_name like 'net_%' order by 1;
264
VARIABLE_NAME VARIABLE_VALUE
265
NET_BUFFER_LENGTH 1024
268
NET_WRITE_TIMEOUT 1000
269
show session variables like 'net_%';
271
net_buffer_length 7168
274
net_write_timeout 500
275
select * from information_schema.session_variables where variable_name like 'net_%' order by 1;
276
VARIABLE_NAME VARIABLE_VALUE
277
NET_BUFFER_LENGTH 7168
280
NET_WRITE_TIMEOUT 500
281
set net_buffer_length=1;
283
Warning 1292 Truncated incorrect net_buffer_length value: '1'
284
show variables like 'net_buffer_length';
286
net_buffer_length 1024
287
select * from information_schema.session_variables where variable_name like 'net_buffer_length';
288
VARIABLE_NAME VARIABLE_VALUE
289
NET_BUFFER_LENGTH 1024
290
set net_buffer_length=2000000000;
292
Warning 1292 Truncated incorrect net_buffer_length value: '2000000000'
293
show variables like 'net_buffer_length';
295
net_buffer_length 1048576
296
select * from information_schema.session_variables where variable_name like 'net_buffer_length';
297
VARIABLE_NAME VARIABLE_VALUE
298
NET_BUFFER_LENGTH 1048576
299
set character set cp1251_koi8;
300
show variables like "character_set_client";
302
character_set_client cp1251
303
select * from information_schema.session_variables where variable_name like 'character_set_client';
304
VARIABLE_NAME VARIABLE_VALUE
305
CHARACTER_SET_CLIENT cp1251
306
select @@timestamp>0;
309
set @@rand_seed1=10000000,@@rand_seed2=1000000;
310
select ROUND(RAND(),5);
313
show variables like '%alloc%';
315
query_alloc_block_size 8192
316
query_prealloc_size 8192
317
range_alloc_block_size 4096
318
transaction_alloc_block_size 8192
319
transaction_prealloc_size 4096
320
select * from information_schema.session_variables where variable_name like '%alloc%' order by 1;
321
VARIABLE_NAME VARIABLE_VALUE
322
QUERY_ALLOC_BLOCK_SIZE 8192
323
QUERY_PREALLOC_SIZE 8192
324
RANGE_ALLOC_BLOCK_SIZE 4096
325
TRANSACTION_ALLOC_BLOCK_SIZE 8192
326
TRANSACTION_PREALLOC_SIZE 4096
327
set @@range_alloc_block_size=1024*16;
328
set @@query_alloc_block_size=1024*17+2;
329
set @@query_prealloc_size=1024*18;
330
set @@transaction_alloc_block_size=1024*20-1;
331
set @@transaction_prealloc_size=1024*21-1;
332
select @@query_alloc_block_size;
333
@@query_alloc_block_size
335
show variables like '%alloc%';
337
query_alloc_block_size 17408
338
query_prealloc_size 18432
339
range_alloc_block_size 16384
340
transaction_alloc_block_size 19456
341
transaction_prealloc_size 20480
342
select * from information_schema.session_variables where variable_name like '%alloc%' order by 1;
343
VARIABLE_NAME VARIABLE_VALUE
344
QUERY_ALLOC_BLOCK_SIZE 17408
345
QUERY_PREALLOC_SIZE 18432
346
RANGE_ALLOC_BLOCK_SIZE 16384
347
TRANSACTION_ALLOC_BLOCK_SIZE 19456
348
TRANSACTION_PREALLOC_SIZE 20480
349
set @@range_alloc_block_size=default;
350
set @@query_alloc_block_size=default, @@query_prealloc_size=default;
351
set transaction_alloc_block_size=default, @@transaction_prealloc_size=default;
352
show variables like '%alloc%';
354
query_alloc_block_size 8192
355
query_prealloc_size 8192
356
range_alloc_block_size 4096
357
transaction_alloc_block_size 8192
358
transaction_prealloc_size 4096
359
select * from information_schema.session_variables where variable_name like '%alloc%' order by 1;
360
VARIABLE_NAME VARIABLE_VALUE
361
QUERY_ALLOC_BLOCK_SIZE 8192
362
QUERY_PREALLOC_SIZE 8192
363
RANGE_ALLOC_BLOCK_SIZE 4096
364
TRANSACTION_ALLOC_BLOCK_SIZE 8192
365
TRANSACTION_PREALLOC_SIZE 4096
366
SELECT @@version LIKE 'non-existent';
367
@@version LIKE 'non-existent'
369
SELECT @@version_compile_os LIKE 'non-existent';
370
@@version_compile_os LIKE 'non-existent'
373
ERROR 42000: Variable 'big_tables' can't be set to the value of 'OFFF'
374
set big_tables="OFFF";
375
ERROR 42000: Variable 'big_tables' can't be set to the value of 'OFFF'
376
set unknown_variable=1;
377
ERROR HY000: Unknown system variable 'unknown_variable'
378
set max_join_size="hello";
379
ERROR 42000: Incorrect argument type to variable 'max_join_size'
380
set storage_engine=UNKNOWN_TABLE_TYPE;
381
ERROR 42000: Unknown table engine 'UNKNOWN_TABLE_TYPE'
382
set SESSION query_cache_size=10000;
383
ERROR HY000: Variable 'query_cache_size' is a GLOBAL variable and should be set with SET GLOBAL
384
set GLOBAL storage_engine=DEFAULT;
385
ERROR 42000: Variable 'storage_engine' doesn't have a default value
386
set character_set_client=UNKNOWN_CHARACTER_SET;
387
ERROR 42000: Unknown character set: 'UNKNOWN_CHARACTER_SET'
388
set collation_connection=UNKNOWN_COLLATION;
389
ERROR HY000: Unknown collation: 'UNKNOWN_COLLATION'
390
set character_set_client=NULL;
391
ERROR 42000: Variable 'character_set_client' can't be set to the value of 'NULL'
392
set collation_connection=NULL;
393
ERROR 42000: Variable 'collation_connection' can't be set to the value of 'NULL'
394
set global autocommit=1;
395
ERROR HY000: Variable 'autocommit' is a SESSION variable and can't be used with SET GLOBAL
396
select @@global.timestamp;
397
ERROR HY000: Variable 'timestamp' is a SESSION variable
399
ERROR HY000: Variable 'version' is a read only variable
400
set @@concurrent_insert=1;
401
ERROR HY000: Variable 'concurrent_insert' is a GLOBAL variable and should be set with SET GLOBAL
402
set @@global.sql_auto_is_null=1;
403
ERROR HY000: Variable 'sql_auto_is_null' is a SESSION variable and can't be used with SET GLOBAL
404
select @@global.sql_auto_is_null;
405
ERROR HY000: Variable 'sql_auto_is_null' is a SESSION variable
406
set myisam_max_sort_file_size=100;
407
ERROR HY000: Variable 'myisam_max_sort_file_size' is a GLOBAL variable and should be set with SET GLOBAL
408
set @@SQL_WARNINGS=NULL;
409
ERROR 42000: Variable 'sql_warnings' can't be set to the value of 'NULL'
412
select @@autocommit, @@big_tables;
413
@@autocommit @@big_tables
415
set global binlog_cache_size=100;
417
Warning 1292 Truncated incorrect binlog_cache_size value: '100'
418
set bulk_insert_buffer_size=100;
419
set character set cp1251_koi8;
420
set character set default;
421
set @@global.concurrent_insert=1;
422
set global connect_timeout=100;
423
select @@delay_key_write;
426
set global delay_key_write="OFF";
427
select @@delay_key_write;
430
set global delay_key_write=ALL;
431
select @@delay_key_write;
434
set global delay_key_write=1;
435
select @@delay_key_write;
438
set global delayed_insert_limit=100;
439
set global delayed_insert_timeout=100;
440
set global delayed_queue_size=100;
442
set global flush_time=100;
444
set interactive_timeout=100;
445
set join_buffer_size=100;
447
Warning 1292 Truncated incorrect join_buffer_size value: '100'
448
set last_insert_id=1;
449
set global local_infile=1;
450
set long_query_time=0.000001;
451
select @@long_query_time;
454
set long_query_time=100.000001;
455
select @@long_query_time;
458
set low_priority_updates=1;
459
set max_allowed_packet=100;
461
Warning 1292 Truncated incorrect max_allowed_packet value: '100'
462
set global max_binlog_cache_size=100;
464
Warning 1292 Truncated incorrect max_binlog_cache_size value: '100'
465
set global max_binlog_size=100;
467
Warning 1292 Truncated incorrect max_binlog_size value: '100'
468
set global max_connect_errors=100;
469
set global max_connections=100;
470
set global max_delayed_threads=100;
471
set max_heap_table_size=100;
473
Warning 1292 Truncated incorrect max_heap_table_size value: '100'
474
set max_join_size=100;
475
set max_sort_length=100;
476
set max_tmp_tables=100;
477
set global max_user_connections=100;
478
select @@max_user_connections;
479
@@max_user_connections
481
set global max_write_lock_count=100;
482
set myisam_sort_buffer_size=100;
483
set net_buffer_length=100;
485
Warning 1292 Truncated incorrect net_buffer_length value: '100'
486
set net_read_timeout=100;
487
set net_write_timeout=100;
488
set global query_cache_limit=100;
489
set global query_cache_size=100;
490
set global query_cache_type=demand;
491
set read_buffer_size=100;
493
Warning 1292 Truncated incorrect read_buffer_size value: '100'
494
set read_rnd_buffer_size=100;
495
set global rpl_recovery_rank=100;
496
set global server_id=100;
497
set global slow_launch_time=100;
498
set sort_buffer_size=100;
500
Warning 1292 Truncated incorrect sort_buffer_size value: '100'
501
set @@max_sp_recursion_depth=10;
502
select @@max_sp_recursion_depth;
503
@@max_sp_recursion_depth
505
set @@max_sp_recursion_depth=0;
506
select @@max_sp_recursion_depth;
507
@@max_sp_recursion_depth
509
set sql_auto_is_null=1;
510
select @@sql_auto_is_null;
513
set @@sql_auto_is_null=0;
514
select @@sql_auto_is_null;
517
set sql_big_selects=1;
518
set sql_big_tables=1;
519
set sql_buffer_result=1;
522
set sql_log_update=1;
524
Note 1315 The update log is deprecated and replaced by the binary log; SET SQL_LOG_UPDATE has been ignored
525
set sql_low_priority_updates=1;
526
set sql_max_join_size=200;
527
select @@sql_max_join_size,@@max_join_size;
528
@@sql_max_join_size @@max_join_size
530
set sql_quote_show_create=1;
531
set sql_safe_updates=1;
532
set sql_select_limit=1;
533
set sql_select_limit=default;
535
set global table_open_cache=100;
536
set storage_engine=myisam;
537
set global thread_cache_size=100;
538
set timestamp=1, timestamp=default;
539
set tmp_table_size=100;
541
Warning 1292 Truncated incorrect tmp_table_size value: '100'
542
set tx_isolation="READ-COMMITTED";
543
set wait_timeout=100;
545
set global log_warnings=1;
546
select @@session.insert_id;
549
set @save_insert_id=@@session.insert_id;
550
set session insert_id=20;
551
select @@session.insert_id;
554
set session last_insert_id=100;
555
select @@session.insert_id;
558
select @@session.last_insert_id;
559
@@session.last_insert_id
561
select @@session.insert_id;
564
set @@session.insert_id=@save_insert_id;
565
select @@session.insert_id;
568
create table t1 (a int not null auto_increment, primary key(a));
569
create table t2 (a int not null auto_increment, primary key(a));
570
insert into t1 values(null),(null),(null);
571
insert into t2 values(null),(null),(null);
572
set global key_buffer_size=100000;
573
select @@key_buffer_size;
576
select * from t1 where a=2;
579
select * from t2 where a=3;
583
Table Op Msg_type Msg_text
584
test.t1 check status OK
585
test.t2 check status OK
586
select max(a) +1, max(a) +2 into @xx,@yy from t1;
589
ERROR HY000: Unknown system variable 'xxxxxxxxxx'
593
select @@session.key_buffer_size;
594
ERROR HY000: Variable 'key_buffer_size' is a GLOBAL variable
595
set ft_boolean_syntax = @@init_connect;
596
ERROR HY000: Variable 'ft_boolean_syntax' is a GLOBAL variable and should be set with SET GLOBAL
597
set global ft_boolean_syntax = @@init_connect;
598
ERROR 42000: Variable 'ft_boolean_syntax' can't be set to the value of ''
599
set init_connect = NULL;
600
ERROR HY000: Variable 'init_connect' is a GLOBAL variable and should be set with SET GLOBAL
601
set global init_connect = NULL;
602
set ft_boolean_syntax = @@init_connect;
603
ERROR HY000: Variable 'ft_boolean_syntax' is a GLOBAL variable and should be set with SET GLOBAL
604
set global ft_boolean_syntax = @@init_connect;
605
ERROR 42000: Variable 'ft_boolean_syntax' can't be set to the value of ''
606
set global myisam_max_sort_file_size=4294967296;
607
show global variables like 'myisam_max_sort_file_size';
609
myisam_max_sort_file_size MAX_FILE_SIZE
610
select * from information_schema.global_variables where variable_name like 'myisam_max_sort_file_size';
611
VARIABLE_NAME VARIABLE_VALUE
612
MYISAM_MAX_SORT_FILE_SIZE MAX_FILE_SIZE
613
set global myisam_max_sort_file_size=default;
614
select @@global.max_user_connections,@@local.max_join_size;
615
@@global.max_user_connections @@local.max_join_size
617
set @svc=@@global.max_user_connections, @svj=@@local.max_join_size;
618
select @@global.max_user_connections,@@local.max_join_size;
619
@@global.max_user_connections @@local.max_join_size
621
set @@global.max_user_connections=111,@@local.max_join_size=222;
622
select @@global.max_user_connections,@@local.max_join_size;
623
@@global.max_user_connections @@local.max_join_size
625
set @@global.max_user_connections=@@local.max_join_size,@@local.max_join_size=@@global.max_user_connections;
626
select @@global.max_user_connections,@@local.max_join_size;
627
@@global.max_user_connections @@local.max_join_size
629
set @@global.max_user_connections=@svc, @@local.max_join_size=@svj;
630
select @@global.max_user_connections,@@local.max_join_size;
631
@@global.max_user_connections @@local.max_join_size
638
set @@global.global.key_buffer_size= 1;
639
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key_buffer_size= 1' at line 1
640
set GLOBAL global.key_buffer_size= 1;
641
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key_buffer_size= 1' at line 1
642
SELECT @@global.global.key_buffer_size;
643
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key_buffer_size' at line 1
644
SELECT @@global.session.key_buffer_size;
645
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key_buffer_size' at line 1
646
SELECT @@global.local.key_buffer_size;
647
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'key_buffer_size' at line 1
648
set @tstlw = @@log_warnings;
649
show global variables like 'log_warnings';
652
select * from information_schema.global_variables where variable_name like 'log_warnings';
653
VARIABLE_NAME VARIABLE_VALUE
655
set global log_warnings = 0;
656
show global variables like 'log_warnings';
659
select * from information_schema.global_variables where variable_name like 'log_warnings';
660
VARIABLE_NAME VARIABLE_VALUE
662
set global log_warnings = 42;
663
show global variables like 'log_warnings';
666
select * from information_schema.global_variables where variable_name like 'log_warnings';
667
VARIABLE_NAME VARIABLE_VALUE
669
set global log_warnings = @tstlw;
670
show global variables like 'log_warnings';
673
select * from information_schema.global_variables where variable_name like 'log_warnings';
674
VARIABLE_NAME VARIABLE_VALUE
682
show create table t1;
684
t1 CREATE TABLE `t1` (
685
`c1` tinyint(4) DEFAULT NULL,
686
`c2` smallint(6) DEFAULT NULL,
687
`c3` mediumint(9) DEFAULT NULL,
688
`c4` int(11) DEFAULT NULL,
689
`c5` bigint(20) DEFAULT NULL
690
) ENGINE=MyISAM DEFAULT CHARSET=latin1
692
set @arg00= 8, @arg01= 8.8, @arg02= 'a string', @arg03= 0.2e0;
693
create table t1 as select @arg00 as c1, @arg01 as c2, @arg02 as c3, @arg03 as c4;
694
show create table t1;
696
t1 CREATE TABLE `t1` (
697
`c1` bigint(20) DEFAULT NULL,
698
`c2` decimal(65,30) DEFAULT NULL,
700
`c4` double DEFAULT NULL
701
) ENGINE=MyISAM DEFAULT CHARSET=latin1
703
SET GLOBAL MYISAM_DATA_POINTER_SIZE= 7;
704
SHOW VARIABLES LIKE 'MYISAM_DATA_POINTER_SIZE';
706
myisam_data_pointer_size 7
707
SELECT * FROM INFORMATION_SCHEMA.SESSION_VARIABLES WHERE VARIABLE_NAME LIKE 'MYISAM_DATA_POINTER_SIZE';
708
VARIABLE_NAME VARIABLE_VALUE
709
MYISAM_DATA_POINTER_SIZE 7
710
SET GLOBAL table_open_cache=-1;
712
Warning 1292 Truncated incorrect table_open_cache value: '0'
713
SHOW VARIABLES LIKE 'table_open_cache';
716
SELECT * FROM INFORMATION_SCHEMA.SESSION_VARIABLES WHERE VARIABLE_NAME LIKE 'table_open_cache';
717
VARIABLE_NAME VARIABLE_VALUE
719
SET GLOBAL table_open_cache=DEFAULT;
720
set character_set_results=NULL;
721
select ifnull(@@character_set_results,"really null");
722
ifnull(@@character_set_results,"really null")
725
select @@have_innodb;
728
*** Various tests with LC_TIME_NAMES
729
*** LC_TIME_NAMES: testing case insensitivity
730
set @@lc_time_names='ru_ru';
731
select @@lc_time_names;
734
*** LC_TIME_NAMES: testing with a user variable
736
set @@lc_time_names=@lc;
737
select @@lc_time_names;
740
*** LC_TIME_NAMES: testing with string expressions
741
set lc_time_names=concat('de','_','DE');
742
select @@lc_time_names;
745
set lc_time_names=concat('de','+','DE');
746
ERROR HY000: Unknown locale: 'de+DE'
747
select @@lc_time_names;
750
LC_TIME_NAMES: testing with numeric expressions
751
set @@lc_time_names=1+2;
752
select @@lc_time_names;
755
set @@lc_time_names=1/0;
756
ERROR 42000: Incorrect argument type to variable 'lc_time_names'
757
select @@lc_time_names;
760
set lc_time_names=en_US;
761
LC_TIME_NAMES: testing NULL and a negative number:
762
set lc_time_names=NULL;
763
ERROR 42000: Variable 'lc_time_names' can't be set to the value of 'NULL'
764
set lc_time_names=-1;
765
ERROR HY000: Unknown locale: '-1'
766
select @@lc_time_names;
769
LC_TIME_NAMES: testing locale with the last ID:
770
set lc_time_names=108;
771
select @@lc_time_names;
774
LC_TIME_NAMES: testing a number beyond the valid ID range:
775
set lc_time_names=109;
776
ERROR HY000: Unknown locale: '109'
777
select @@lc_time_names;
780
LC_TIME_NAMES: testing that 0 is en_US:
782
select @@lc_time_names;
785
select @@global.lc_time_names, @@lc_time_names;
786
@@global.lc_time_names @@lc_time_names
788
set @@global.lc_time_names=fr_FR;
789
select @@global.lc_time_names, @@lc_time_names;
790
@@global.lc_time_names @@lc_time_names
793
select @@global.lc_time_names, @@lc_time_names;
794
@@global.lc_time_names @@lc_time_names
796
set @@lc_time_names=ru_RU;
797
select @@global.lc_time_names, @@lc_time_names;
798
@@global.lc_time_names @@lc_time_names
800
Returnung to default connection
801
select @@global.lc_time_names, @@lc_time_names;
802
@@global.lc_time_names @@lc_time_names
804
set lc_time_names=default;
805
select @@global.lc_time_names, @@lc_time_names;
806
@@global.lc_time_names @@lc_time_names
808
set @@global.lc_time_names=default;
809
select @@global.lc_time_names, @@lc_time_names;
810
@@global.lc_time_names @@lc_time_names
812
set @@lc_time_names=default;
813
select @@global.lc_time_names, @@lc_time_names;
814
@@global.lc_time_names @@lc_time_names
816
set @test = @@query_prealloc_size;
817
set @@query_prealloc_size = @test;
818
select @@query_prealloc_size = @test;
819
@@query_prealloc_size = @test
821
set global sql_mode=repeat('a',80);
822
ERROR 42000: Variable 'sql_mode' can't be set to the value of 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
824
create table t1 (a int);
825
select a into @x from t1;
827
Warning 1329 No data - zero rows fetched, selected, or processed
830
Warning 1329 No data - zero rows fetched, selected, or processed
832
set @@warning_count=1;
833
ERROR HY000: Variable 'warning_count' is a read only variable
834
set @@global.error_count=1;
835
ERROR HY000: Variable 'error_count' is a read only variable
836
set @@max_heap_table_size= 4294967296;
837
select @@max_heap_table_size > 0;
838
@@max_heap_table_size > 0
840
set global max_heap_table_size= 4294967296;
841
select @@max_heap_table_size > 0;
842
@@max_heap_table_size > 0
844
set @@max_heap_table_size= 4294967296;
845
select @@max_heap_table_size > 0;
846
@@max_heap_table_size > 0
848
select @@character_set_system;
849
@@character_set_system
851
set global character_set_system = latin1;
852
ERROR HY000: Variable 'character_set_system' is a read only variable
853
set @@global.version_compile_os='234';
854
ERROR HY000: Variable 'version_compile_os' is a read only variable
855
set character_set_filesystem=latin1;
856
select @@character_set_filesystem;
857
@@character_set_filesystem
859
set @@global.character_set_filesystem=latin2;
860
set character_set_filesystem=latin1;
861
select @@character_set_filesystem;
862
@@character_set_filesystem
864
set @@global.character_set_filesystem=latin2;
865
set character_set_filesystem=default;
866
select @@character_set_filesystem;
867
@@character_set_filesystem
869
set @@global.character_set_filesystem=default;
870
select @@global.character_set_filesystem;
871
@@global.character_set_filesystem
873
set @old_sql_big_selects = @@sql_big_selects;
874
set @@sql_big_selects = 1;
875
show variables like 'sql_big_selects';
878
select * from information_schema.session_variables where variable_name like 'sql_big_selects';
879
VARIABLE_NAME VARIABLE_VALUE
881
set @@sql_big_selects = @old_sql_big_selects;
882
set @@sql_notes = 0, @@sql_warnings = 0;
883
show variables like 'sql_notes';
886
select * from information_schema.session_variables where variable_name like 'sql_notes';
887
VARIABLE_NAME VARIABLE_VALUE
889
show variables like 'sql_warnings';
892
select * from information_schema.session_variables where variable_name like 'sql_warnings';
893
VARIABLE_NAME VARIABLE_VALUE
895
set @@sql_notes = 1, @@sql_warnings = 1;
896
show variables like 'sql_notes';
899
select * from information_schema.session_variables where variable_name like 'sql_notes';
900
VARIABLE_NAME VARIABLE_VALUE
902
show variables like 'sql_warnings';
905
select * from information_schema.session_variables where variable_name like 'sql_warnings';
906
VARIABLE_NAME VARIABLE_VALUE
908
select @@system_time_zone;
911
select @@version, @@version_comment, @@version_compile_machine,
912
@@version_compile_os;
913
@@version @@version_comment @@version_compile_machine @@version_compile_os
915
select @@basedir, @@datadir, @@tmpdir;
916
@@basedir @@datadir @@tmpdir
918
show variables like 'basedir';
921
select * from information_schema.session_variables where variable_name like 'basedir';
922
VARIABLE_NAME VARIABLE_VALUE
924
show variables like 'datadir';
927
select * from information_schema.session_variables where variable_name like 'datadir';
928
VARIABLE_NAME VARIABLE_VALUE
930
show variables like 'tmpdir';
933
select * from information_schema.session_variables where variable_name like 'tmpdir';
934
VARIABLE_NAME VARIABLE_VALUE
936
select @@ssl_ca, @@ssl_capath, @@ssl_cert, @@ssl_cipher, @@ssl_key;
937
@@ssl_ca @@ssl_capath @@ssl_cert @@ssl_cipher @@ssl_key
939
show variables like 'ssl%';
946
select * from information_schema.session_variables where variable_name like 'ssl%' order by 1;
947
VARIABLE_NAME VARIABLE_VALUE
953
select @@log_queries_not_using_indexes;
954
@@log_queries_not_using_indexes
956
show variables like 'log_queries_not_using_indexes';
958
log_queries_not_using_indexes OFF
959
select * from information_schema.session_variables where variable_name like 'log_queries_not_using_indexes';
960
VARIABLE_NAME VARIABLE_VALUE
961
LOG_QUERIES_NOT_USING_INDEXES OFF
963
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '""' at line 1
965
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '&' at line 1
967
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '@' at line 1
971
set @@hostname= "anothername";
972
ERROR HY000: Variable 'hostname' is a read only variable
973
show variables like 'hostname';
977
set global binlog_cache_size =@my_binlog_cache_size;
978
set global connect_timeout =@my_connect_timeout;
979
set global delayed_insert_timeout =@my_delayed_insert_timeout;
980
set global delayed_queue_size =@my_delayed_queue_size;
981
set global flush =@my_flush;
982
set global flush_time =@my_flush_time;
983
set global key_buffer_size =@my_key_buffer_size;
984
set global max_binlog_cache_size =default;
985
set global max_binlog_size =@my_max_binlog_size;
986
set global max_connect_errors =@my_max_connect_errors;
987
set global max_connections =@my_max_connections;
988
set global max_delayed_threads =@my_max_delayed_threads;
989
set global max_heap_table_size =@my_max_heap_table_size;
990
set global max_insert_delayed_threads=@my_max_insert_delayed_threads;
991
set global max_join_size =@my_max_join_size;
992
set global max_user_connections =default;
993
set global max_write_lock_count =default;
994
set global myisam_data_pointer_size =@my_myisam_data_pointer_size;
995
set global net_buffer_length =@my_net_buffer_length;
996
set global net_write_timeout =@my_net_write_timeout;
997
set global net_read_timeout =@my_net_read_timeout;
998
set global query_cache_limit =@my_query_cache_limit;
999
set global query_cache_type =@my_query_cache_type;
1000
set global rpl_recovery_rank =@my_rpl_recovery_rank;
1001
set global server_id =@my_server_id;
1002
set global slow_launch_time =@my_slow_launch_time;
1003
set global storage_engine =@my_storage_engine;
1004
set global thread_cache_size =@my_thread_cache_size;
1005
show global variables where Variable_name='table_definition_cache' or
1006
Variable_name='table_lock_wait_timeout';
1008
table_definition_cache #
1009
table_lock_wait_timeout #
1012
# -- Bug#34820: log_output can be set to illegal value.
1014
SET GLOBAL log_output = '';
1015
ERROR 42000: Variable 'log_output' can't be set to the value of ''
1016
SET GLOBAL log_output = 0;
1017
ERROR 42000: Variable 'log_output' can't be set to the value of '0'
1019
# -- End of Bug#34820.