47
set max_join_size=100;
48
show variables like 'max_join_size';
51
show global variables like 'max_join_size';
53
max_join_size 4294967295
54
set GLOBAL max_join_size=2000;
55
show global variables like 'max_join_size';
58
set max_join_size=DEFAULT;
59
show variables like 'max_join_size';
62
set GLOBAL max_join_size=DEFAULT;
63
show global variables like 'max_join_size';
65
max_join_size 4294967295
66
set @@max_join_size=1000, @@global.max_join_size=2000;
67
select @@local.max_join_size, @@global.max_join_size;
68
@@max_join_size @@max_join_size
70
select @@identity, length(@@version)>0;
71
@@identity length(@@version)>0
47
73
select @@VERSION=version();
48
74
@@VERSION=version()
50
76
select last_insert_id(345);
51
77
last_insert_id(345)
53
select @@IDENTITY,last_insert_id();
54
@@IDENTITY last_insert_id()
59
select @@unknown_variable;
79
select @@IDENTITY,last_insert_id(), @@identity;
80
@@identity last_insert_id() @@identity
82
set big_tables=OFF, big_tables=ON, big_tables=0, big_tables=1, big_tables="OFF", big_tables="ON";
83
set global concurrent_insert=ON;
84
show variables like 'concurrent_insert';
87
set global concurrent_insert=1;
88
show variables like 'concurrent_insert';
91
set global concurrent_insert=0;
92
show variables like 'concurrent_insert';
95
set global concurrent_insert=OFF;
96
show variables like 'concurrent_insert';
99
set global concurrent_insert=DEFAULT;
100
show variables like 'concurrent_insert';
103
set table_type=MYISAM, table_type="HEAP", global table_type="INNODB";
104
show local variables like 'table_type';
107
show global variables like 'table_type';
110
set GLOBAL query_cache_size=100000;
111
set GLOBAL safe_show_database=0;
112
set myisam_max_sort_file_size=10000, GLOBAL myisam_max_sort_file_size=20000;
113
show variables like 'myisam_max_sort_file_size';
115
myisam_max_sort_file_size 10000
116
show global variables like 'myisam_max_sort_file_size';
118
myisam_max_sort_file_size 20000
119
set myisam_max_sort_file_size=default;
120
show variables like 'myisam_max_sort_file_size';
122
myisam_max_sort_file_size 20000
123
set global net_buffer_length=1024, net_write_timeout=200, net_read_timeout=300;
124
set session net_buffer_length=2048, net_write_timeout=500, net_read_timeout=600;
125
show global variables like 'net_%';
127
net_buffer_length 1024
130
net_write_timeout 200
131
show session variables like 'net_%';
133
net_buffer_length 2048
136
net_write_timeout 500
137
set session net_buffer_length=8000, global net_read_timeout=900, net_write_timeout=1000;
138
show global variables like 'net_%';
140
net_buffer_length 1024
143
net_write_timeout 1000
144
show session variables like 'net_%';
146
net_buffer_length 7168
149
net_write_timeout 500
150
set net_buffer_length=1;
151
show variables like 'net_buffer_length';
153
net_buffer_length 1024
154
set net_buffer_length=2000000000;
155
show variables like 'net_buffer_length';
157
net_buffer_length 1048576
158
set GLOBAL character set cp1251_koi8;
159
show global variables like "convert_character_set";
161
convert_character_set cp1251_koi8
162
set character set cp1251_koi8;
163
show variables like "convert_character_set";
165
convert_character_set cp1251_koi8
166
set global character set default, session character set default;
167
show variables like "convert_character_set";
169
convert_character_set cp1251_koi8
170
select @@timestamp>0;
174
Variable 'big_tables' can't be set to the value of 'OFFF'
175
set big_tables="OFFF";
176
Variable 'big_tables' can't be set to the value of 'OFFF'
177
set unknown_variable=1;
60
178
Unknown system variable 'unknown_variable'
179
set max_join_size="hello";
180
Wrong argument type to variable 'max_join_size'
181
set table_type=UNKNOWN_TABLE_TYPE;
182
Variable 'table_type' can't be set to the value of 'UNKNOWN_TABLE_TYPE'
183
set table_type=INNODB, big_tables=2;
184
Variable 'big_tables' can't be set to the value of '2'
185
show local variables like 'table_type';
188
set SESSION query_cache_size=10000;
189
Variable 'query_cache_size' is a GLOBAL variable and should be set with SET GLOBAL
190
set GLOBAL table_type=DEFAULT;
191
Variable 'table_type' doesn't have a default value
192
set convert_character_set=UNKNOWN_CHARACTER_SET;
193
Unknown character set: 'UNKNOWN_CHARACTER_SET'
194
set character set unknown;
195
Unknown character set: 'unknown'
197
Wrong argument type to variable 'convert_character_set'
198
set global autocommit=1;
199
Variable 'autocommit' is a LOCAL variable and can't be used with SET GLOBAL
200
select @@global.timestamp;
201
Variable 'timestamp' is a LOCAL variable and can't be used with SET GLOBAL
203
Unknown system variable 'version'
204
set @@concurrent_insert=1;
205
Variable 'concurrent_insert' is a GLOBAL variable and should be set with SET GLOBAL
206
set @@global.sql_auto_is_null=1;
207
Variable 'sql_auto_is_null' is a LOCAL variable and can't be used with SET GLOBAL
208
select @@global.sql_auto_is_null;
209
Variable 'sql_auto_is_null' is a LOCAL variable and can't be used with SET GLOBAL
212
select @@autocommit, @@big_tables;
213
@@autocommit @@big_tables
215
set global binlog_cache_size=100;
216
set bulk_insert_buffer_size=100;
217
set convert_character_set=cp1251_koi8;
218
set convert_character_set=default;
219
set @@global.concurrent_insert=1;
220
set global connect_timeout=100;
221
set global delay_key_write=1;
222
set global delayed_insert_limit=100;
223
set global delayed_insert_timeout=100;
224
set global delayed_queue_size=100;
226
set global flush_time=100;
228
set interactive_timeout=100;
229
set join_buffer_size=100;
230
set last_insert_id=1;
231
set global local_infile=1;
232
set long_query_time=100;
233
set low_priority_updates=1;
234
set max_allowed_packet=100;
235
set global max_binlog_cache_size=100;
236
set global max_binlog_size=100;
237
set global max_connect_errors=100;
238
set global max_connections=100;
239
set global max_delayed_threads=100;
240
set max_heap_table_size=100;
241
set max_join_size=100;
242
set max_sort_length=100;
243
set max_tmp_tables=100;
244
set global max_user_connections=100;
245
select @@max_user_connections;
246
@@max_user_connections
248
set global max_write_lock_count=100;
249
set myisam_max_extra_sort_file_size=100;
250
select @@myisam_max_extra_sort_file_size;
251
@@myisam_max_extra_sort_file_size
253
set myisam_max_sort_file_size=100;
254
set myisam_sort_buffer_size=100;
255
set net_buffer_length=100;
256
set net_read_timeout=100;
257
set net_write_timeout=100;
258
set global query_cache_limit=100;
259
set global query_cache_size=100;
260
set global query_cache_type=demand;
261
set read_buffer_size=100;
262
set read_rnd_buffer_size=100;
263
set global rpl_recovery_rank=100;
264
set global safe_show_database=1;
265
set global server_id=100;
266
set global slave_net_timeout=100;
267
set global slow_launch_time=100;
268
set sort_buffer_size=100;
269
set sql_auto_is_null=1;
270
select @@sql_auto_is_null;
273
set @@sql_auto_is_null=0;
274
select @@sql_auto_is_null;
277
set sql_big_selects=1;
278
set sql_big_tables=1;
279
set sql_buffer_result=1;
282
set sql_log_update=1;
283
set sql_low_priority_updates=1;
284
set sql_max_join_size=200;
285
select @@sql_max_join_size,@@max_join_size;
286
@@sql_max_join_size @@max_join_size
288
set sql_quote_show_create=1;
289
set sql_safe_updates=1;
290
set sql_select_limit=1;
291
set global sql_slave_skip_counter=100;
293
set global table_cache=100;
294
set table_type=myisam;
295
set global thread_cache_size=100;
296
set timestamp=1, timestamp=default;
297
set tmp_table_size=100;
298
set tx_isolation="READ-COMMITTED";
299
set wait_timeout=100;
301
DROP TABLE IF EXISTS t1,t2;
302
create table t1 (a int not null auto_increment, primary key(a));
303
create table t2 (a int not null auto_increment, primary key(a));
304
insert into t1 values(null),(null),(null);
305
insert into t2 values(null),(null),(null);
306
set global key_buffer_size=100000;
307
select @@key_buffer_size;
310
select * from t1 where a=2;
313
select * from t2 where a=3;
317
Table Op Msg_type Msg_text
318
test.t1 check status OK
319
test.t2 check status OK