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  • Committer: Brian Aker
  • Date: 2009-02-21 00:18:15 UTC
  • Revision ID: brian@tangent.org-20090221001815-x20e8h71e984lvs1
Completion (?) of uint conversion.

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1
DROP TABLE IF EXISTS t0,t1,t2,t3,t4,t5;
 
2
select * from information_schema.SCHEMATA where schema_name > 'm';
 
3
CATALOG_NAME    SCHEMA_NAME     DEFAULT_CHARACTER_SET_NAME      DEFAULT_COLLATION_NAME  SQL_PATH
 
4
NULL    mysql   utf8    utf8_general_ci NULL
 
5
NULL    test    utf8    utf8_general_ci NULL
 
6
select schema_name from information_schema.schemata;
 
7
schema_name
 
8
information_schema
 
9
mysql
 
10
test
 
11
show databases like 't%';
 
12
Database (t%)
 
13
test
 
14
show databases;
 
15
Database
 
16
information_schema
 
17
mysql
 
18
test
 
19
create database mysqltest;
 
20
create table mysqltest.t1(a int, b VARCHAR(30), KEY string_data (b));
 
21
create table test.t2(a int);
 
22
create table t3(a int, KEY a_data (a));
 
23
create table mysqltest.t4(a int);
 
24
create table t5 (id int auto_increment primary key);
 
25
insert into t5 values (10);
 
26
select table_name from information_schema.TABLES
 
27
where table_schema = "mysqltest" and table_name like "t%";
 
28
table_name
 
29
t1
 
30
t4
 
31
select * from information_schema.STATISTICS where TABLE_SCHEMA = "mysqltest";
 
32
TABLE_CATALOG   TABLE_SCHEMA    TABLE_NAME      NON_UNIQUE      INDEX_SCHEMA    INDEX_NAME      SEQ_IN_INDEX    COLUMN_NAME     COLLATION       CARDINALITY     SUB_PART        PACKED  NULLABLE        INDEX_TYPE      COMMENT INDEX_COMMENT
 
33
NULL    mysqltest       t1      1       mysqltest       string_data     1       b       A       0       NULL    NULL    YES     BTREE           
 
34
show tables like 't%';
 
35
Tables_in_test (t%)
 
36
t2
 
37
t3
 
38
t5
 
39
show full columns from t3 like "a%";
 
40
Field   Type    Collation       Null    Key     Default Extra   Privileges      Comment
 
41
a       int     NULL    YES     MUL     NULL            #       
 
42
select * from information_schema.COLUMNS where table_name="t1"
 
43
and column_name= "a";
 
44
TABLE_CATALOG   TABLE_SCHEMA    TABLE_NAME      COLUMN_NAME     ORDINAL_POSITION        COLUMN_DEFAULT  IS_NULLABLE     DATA_TYPE       CHARACTER_MAXIMUM_LENGTH        CHARACTER_OCTET_LENGTH  NUMERIC_PRECISION       NUMERIC_SCALE   CHARACTER_SET_NAME      COLLATION_NAME  COLUMN_TYPE     COLUMN_KEY      EXTRA   PRIVILEGES      COLUMN_COMMENT  STORAGE FORMAT
 
45
NULL    mysqltest       t1      a       1       NULL    YES     int     NULL    NULL    10      0       NULL    NULL    int                                     Default Default
 
46
select table_name, column_name, privileges from information_schema.columns 
 
47
where table_schema = 'mysqltest' and table_name = 't1';
 
48
table_name      column_name     privileges
 
49
t1      a       
 
50
t1      b       
 
51
show columns from mysqltest.t1;
 
52
Field   Type    Null    Key     Default Extra
 
53
a       int     YES             NULL    
 
54
b       varchar(30)     YES     MUL     NULL    
 
55
drop tables mysqltest.t4, mysqltest.t1, t2, t3, t5;
 
56
drop database mysqltest;
 
57
select * from information_schema.CHARACTER_SETS
 
58
where CHARACTER_SET_NAME like 'latin1%';
 
59
CHARACTER_SET_NAME      DEFAULT_COLLATE_NAME    DESCRIPTION     MAXLEN
 
60
select * from information_schema.COLLATIONS
 
61
where COLLATION_NAME like 'latin1%';
 
62
COLLATION_NAME  CHARACTER_SET_NAME      ID      IS_DEFAULT      IS_COMPILED     SORTLEN
 
63
select * from information_schema.COLLATION_CHARACTER_SET_APPLICABILITY
 
64
where COLLATION_NAME like 'latin1%';
 
65
COLLATION_NAME  CHARACTER_SET_NAME
 
66
select * from information_schema.table_names;
 
67
ERROR 42S02: Unknown table 'table_names' in information_schema
 
68
select column_type from information_schema.columns
 
69
where table_schema="information_schema" and table_name="COLUMNS" and
 
70
(column_name="character_set_name" or column_name="collation_name");
 
71
column_type
 
72
varchar(64)
 
73
varchar(64)
 
74
select TABLE_ROWS from information_schema.tables where 
 
75
table_schema="information_schema" and table_name="COLUMNS";
 
76
TABLE_ROWS
 
77
NULL
 
78
select table_type from information_schema.tables
 
79
where table_schema="mysql" and table_name="user";
 
80
table_type
 
81
show global status like "Threads_running";
 
82
Variable_name   Value
 
83
Threads_running #
 
84
select table_schema,table_name, column_name from
 
85
information_schema.columns 
 
86
where data_type = 'longtext';
 
87
table_schema    table_name      column_name
 
88
select table_name, column_name, data_type from information_schema.columns
 
89
where data_type = 'datetime';
 
90
table_name      column_name     data_type
 
91
TABLES  CREATE_TIME     datetime
 
92
TABLES  UPDATE_TIME     datetime
 
93
TABLES  CHECK_TIME      datetime
 
94
INNODB_TRX      trx_started     datetime
 
95
INNODB_TRX      trx_wait_started        datetime
 
96
SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES A
 
97
WHERE NOT EXISTS 
 
98
(SELECT * FROM INFORMATION_SCHEMA.COLUMNS B
 
99
WHERE A.TABLE_SCHEMA = B.TABLE_SCHEMA
 
100
AND A.TABLE_NAME = B.TABLE_NAME);
 
101
COUNT(*)
 
102
0
 
103
create table t1
 
104
( x_bigint BIGINT,
 
105
x_integer INTEGER,
 
106
x_int int,
 
107
x_decimal DECIMAL(5,3),
 
108
x_numeric NUMERIC(5,3),
 
109
x_real REAL,
 
110
x_float FLOAT,
 
111
x_double_precision DOUBLE PRECISION );
 
112
SELECT COLUMN_NAME, CHARACTER_MAXIMUM_LENGTH, CHARACTER_OCTET_LENGTH
 
113
FROM INFORMATION_SCHEMA.COLUMNS
 
114
WHERE TABLE_NAME= 't1';
 
115
COLUMN_NAME     CHARACTER_MAXIMUM_LENGTH        CHARACTER_OCTET_LENGTH
 
116
x_bigint        NULL    NULL
 
117
x_integer       NULL    NULL
 
118
x_int   NULL    NULL
 
119
x_decimal       NULL    NULL
 
120
x_numeric       NULL    NULL
 
121
x_real  NULL    NULL
 
122
x_float NULL    NULL
 
123
x_double_precision      NULL    NULL
 
124
drop table t1;
 
125
SELECT table_schema, count(*) FROM information_schema.TABLES
 
126
WHERE table_name NOT LIKE 'ndb_%' AND table_name NOT LIKE 'falcon%' GROUP BY TABLE_SCHEMA;
 
127
table_schema    count(*)
 
128
information_schema      23
 
129
show create database information_schema;
 
130
Database        Create Database
 
131
information_schema      CREATE DATABASE `information_schema`
 
132
create table t1(f1 LONGBLOB, f2 LONGTEXT);
 
133
select column_name,data_type,CHARACTER_OCTET_LENGTH,
 
134
CHARACTER_MAXIMUM_LENGTH
 
135
from information_schema.columns
 
136
where table_name='t1';
 
137
column_name     data_type       CHARACTER_OCTET_LENGTH  CHARACTER_MAXIMUM_LENGTH
 
138
f1      blob    4294967295      4294967295
 
139
f2      text    4294967295      4294967295
 
140
drop table t1;
 
141
create table t1(f1 int, f2 int, f3 BIGINT, f4 int,
 
142
f5 BIGINT, f6 int, f7 int);
 
143
select column_name, NUMERIC_PRECISION, NUMERIC_SCALE
 
144
from information_schema.columns
 
145
where table_name='t1';
 
146
column_name     NUMERIC_PRECISION       NUMERIC_SCALE
 
147
f1      10      0
 
148
f2      10      0
 
149
f3      19      0
 
150
f4      10      0
 
151
f5      19      0
 
152
f6      10      0
 
153
f7      10      0
 
154
drop table t1;
 
155
create table t1 (a int not null, b int);
 
156
use information_schema;
 
157
select column_name, column_default from columns
 
158
where table_schema='test' and table_name='t1';
 
159
column_name     column_default
 
160
a       NULL
 
161
b       NULL
 
162
use test;
 
163
show columns from t1;
 
164
Field   Type    Null    Key     Default Extra
 
165
a       int     NO              NULL    
 
166
b       int     YES             NULL    
 
167
drop table t1;
 
168
alter database information_schema;
 
169
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your Drizzle server version for the right syntax to use near '' at line 1
 
170
drop database information_schema;
 
171
ERROR 42000: Access denied for user ''@'' to database 'information_schema'
 
172
drop table information_schema.tables;
 
173
ERROR 42000: Access denied for user ''@'' to database 'information_schema'
 
174
alter table information_schema.tables;
 
175
ERROR 42000: Access denied for user ''@'' to database 'information_schema'
 
176
use information_schema;
 
177
create temporary table schemata(f1 char(10));
 
178
ERROR 42000: Access denied for user ''@'' to database 'information_schema'
 
179
use test;
 
180
create table t1(id int);
 
181
insert into t1(id) values (1);
 
182
select 1 from (select 1 from test.t1) a;
 
183
1
 
184
1
 
185
use information_schema;
 
186
select 1 from (select 1 from test.t1) a;
 
187
1
 
188
1
 
189
use test;
 
190
drop table t1;
 
191
create temporary table t1(f1 int, index(f1));
 
192
show columns from t1;
 
193
Field   Type    Null    Key     Default Extra
 
194
f1      int     YES     MUL     NULL    
 
195
describe t1;
 
196
Field   Type    Null    Key     Default Extra
 
197
f1      int     YES     MUL     NULL    
 
198
show indexes from t1;
 
199
Table   Non_unique      Key_name        Seq_in_index    Column_name     Collation       Cardinality     Sub_part        Packed  Null    Index_type      Comment Index_Comment
 
200
t1      1       f1      1       f1      A       0       NULL    NULL    YES     BTREE           
 
201
drop table t1;
 
202
create table t1(f1 varbinary(32), f2 varbinary(64));
 
203
select character_maximum_length, character_octet_length
 
204
from information_schema.columns where table_name='t1';
 
205
character_maximum_length        character_octet_length
 
206
32      32
 
207
64      64
 
208
drop table t1;
 
209
select column_type, group_concat(table_schema, '.', table_name), count(*) as num
 
210
from information_schema.columns where
 
211
table_schema='information_schema' and
 
212
(column_type = 'varchar(7)' or column_type = 'varchar(20)'
 
213
 or column_type = 'varchar(27)')
 
214
group by column_type order by num;
 
215
column_type     group_concat(table_schema, '.', table_name)     num
 
216
varchar(20)     information_schema.PLUGINS      1
 
217
varchar(27)     information_schema.COLUMNS      1
 
218
create table t1(f1 char(1) not null, f2 char(9) not null);
 
219
select CHARACTER_MAXIMUM_LENGTH, CHARACTER_OCTET_LENGTH from
 
220
information_schema.columns where table_schema='test' and table_name = 't1';
 
221
CHARACTER_MAXIMUM_LENGTH        CHARACTER_OCTET_LENGTH
 
222
1       4
 
223
9       36
 
224
drop table t1;
 
225
set @a:= '.';
 
226
create table t1(f1 char(5));
 
227
create table t2(f1 char(5));
 
228
select concat(@a, table_name), @a, table_name
 
229
from information_schema.tables where table_schema = 'test';
 
230
concat(@a, table_name)  @a      table_name
 
231
.t1     .       t1
 
232
.t2     .       t2
 
233
drop table t1,t2;
 
234
SELECT t.table_name, c1.column_name
 
235
FROM information_schema.tables t
 
236
INNER JOIN
 
237
information_schema.columns c1
 
238
ON t.table_schema = c1.table_schema AND
 
239
t.table_name = c1.table_name
 
240
WHERE t.table_schema = 'information_schema' AND
 
241
c1.ordinal_position =
 
242
( SELECT COALESCE(MIN(c2.ordinal_position),1)
 
243
FROM information_schema.columns c2
 
244
WHERE c2.table_schema = t.table_schema AND
 
245
c2.table_name = t.table_name AND
 
246
c2.column_name LIKE '%SCHEMA%'
 
247
        )
 
248
AND t.table_name NOT LIKE 'falcon%';
 
249
table_name      column_name
 
250
CHARACTER_SETS  CHARACTER_SET_NAME
 
251
COLLATIONS      COLLATION_NAME
 
252
COLLATION_CHARACTER_SET_APPLICABILITY   COLLATION_NAME
 
253
COLUMNS TABLE_SCHEMA
 
254
GLOBAL_STATUS   VARIABLE_NAME
 
255
GLOBAL_VARIABLES        VARIABLE_NAME
 
256
KEY_COLUMN_USAGE        CONSTRAINT_SCHEMA
 
257
PLUGINS PLUGIN_NAME
 
258
PROCESSLIST     ID
 
259
REFERENTIAL_CONSTRAINTS CONSTRAINT_SCHEMA
 
260
SCHEMATA        SCHEMA_NAME
 
261
SESSION_STATUS  VARIABLE_NAME
 
262
SESSION_VARIABLES       VARIABLE_NAME
 
263
STATISTICS      TABLE_SCHEMA
 
264
TABLES  TABLE_SCHEMA
 
265
TABLE_CONSTRAINTS       CONSTRAINT_SCHEMA
 
266
INNODB_CMP      page_size
 
267
INNODB_CMP_RESET        page_size
 
268
INNODB_CMPMEM   page_size
 
269
INNODB_CMPMEM_RESET     page_size
 
270
INNODB_LOCK_WAITS       requesting_trx_id
 
271
INNODB_LOCKS    lock_id
 
272
INNODB_TRX      trx_id
 
273
SELECT t.table_name, c1.column_name
 
274
FROM information_schema.tables t
 
275
INNER JOIN
 
276
information_schema.columns c1
 
277
ON t.table_schema = c1.table_schema AND
 
278
t.table_name = c1.table_name
 
279
WHERE t.table_schema = 'information_schema' AND
 
280
c1.ordinal_position =
 
281
( SELECT COALESCE(MIN(c2.ordinal_position),1)
 
282
FROM information_schema.columns c2
 
283
WHERE c2.table_schema = 'information_schema' AND
 
284
c2.table_name = t.table_name AND
 
285
c2.column_name LIKE '%SCHEMA%'
 
286
        )
 
287
AND t.table_name NOT LIKE 'falcon%';
 
288
table_name      column_name
 
289
CHARACTER_SETS  CHARACTER_SET_NAME
 
290
COLLATIONS      COLLATION_NAME
 
291
COLLATION_CHARACTER_SET_APPLICABILITY   COLLATION_NAME
 
292
COLUMNS TABLE_SCHEMA
 
293
GLOBAL_STATUS   VARIABLE_NAME
 
294
GLOBAL_VARIABLES        VARIABLE_NAME
 
295
KEY_COLUMN_USAGE        CONSTRAINT_SCHEMA
 
296
PLUGINS PLUGIN_NAME
 
297
PROCESSLIST     ID
 
298
REFERENTIAL_CONSTRAINTS CONSTRAINT_SCHEMA
 
299
SCHEMATA        SCHEMA_NAME
 
300
SESSION_STATUS  VARIABLE_NAME
 
301
SESSION_VARIABLES       VARIABLE_NAME
 
302
STATISTICS      TABLE_SCHEMA
 
303
TABLES  TABLE_SCHEMA
 
304
TABLE_CONSTRAINTS       CONSTRAINT_SCHEMA
 
305
INNODB_CMP      page_size
 
306
INNODB_CMP_RESET        page_size
 
307
INNODB_CMPMEM   page_size
 
308
INNODB_CMPMEM_RESET     page_size
 
309
INNODB_LOCK_WAITS       requesting_trx_id
 
310
INNODB_LOCKS    lock_id
 
311
INNODB_TRX      trx_id
 
312
SELECT MAX(table_name) FROM information_schema.tables;
 
313
MAX(table_name)
 
314
TABLE_CONSTRAINTS
 
315
SELECT table_name from information_schema.tables
 
316
WHERE table_name=(SELECT MAX(table_name)
 
317
FROM information_schema.tables);
 
318
table_name
 
319
TABLE_CONSTRAINTS
 
320
create table t1 (f1 int);
 
321
create table t2 (f1 int, f2 int);
 
322
select table_name from information_schema.tables
 
323
where table_schema = 'test' and table_name not in
 
324
(select table_name from information_schema.columns
 
325
where table_schema = 'test' and column_name = 'f3');
 
326
table_name
 
327
t1
 
328
t2
 
329
drop table t1,t2;
 
330
select 1 as f1 from information_schema.tables  where "CHARACTER_SETS"=
 
331
(select cast(table_name as char)  from information_schema.tables
 
332
order by table_name limit 1) limit 1;
 
333
f1
 
334
1
 
335
select t.table_name, group_concat(t.table_schema, '.', t.table_name),
 
336
count(*) as num1
 
337
from information_schema.tables t
 
338
inner join information_schema.columns c1
 
339
on t.table_schema = c1.table_schema AND t.table_name = c1.table_name
 
340
where t.table_schema = 'information_schema' AND
 
341
t.table_name not like 'falcon%' AND
 
342
c1.ordinal_position =
 
343
(select isnull(c2.column_type) -
 
344
isnull(group_concat(c2.table_schema, '.', c2.table_name)) +
 
345
count(*) as num
 
346
from information_schema.columns c2 where
 
347
c2.table_schema='information_schema' and
 
348
(c2.column_type = 'varchar(7)' or c2.column_type = 'varchar(20)')
 
349
group by c2.column_type order by num limit 1)
 
350
group by t.table_name order by num1, t.table_name;
 
351
table_name      group_concat(t.table_schema, '.', t.table_name) num1
 
352
CHARACTER_SETS  information_schema.CHARACTER_SETS       1
 
353
COLLATIONS      information_schema.COLLATIONS   1
 
354
COLLATION_CHARACTER_SET_APPLICABILITY   information_schema.COLLATION_CHARACTER_SET_APPLICABILITY        1
 
355
COLUMNS information_schema.COLUMNS      1
 
356
GLOBAL_STATUS   information_schema.GLOBAL_STATUS        1
 
357
GLOBAL_VARIABLES        information_schema.GLOBAL_VARIABLES     1
 
358
INNODB_CMP      information_schema.INNODB_CMP   1
 
359
INNODB_CMPMEM   information_schema.INNODB_CMPMEM        1
 
360
INNODB_CMPMEM_RESET     information_schema.INNODB_CMPMEM_RESET  1
 
361
INNODB_CMP_RESET        information_schema.INNODB_CMP_RESET     1
 
362
INNODB_LOCKS    information_schema.INNODB_LOCKS 1
 
363
INNODB_LOCK_WAITS       information_schema.INNODB_LOCK_WAITS    1
 
364
INNODB_TRX      information_schema.INNODB_TRX   1
 
365
KEY_COLUMN_USAGE        information_schema.KEY_COLUMN_USAGE     1
 
366
PLUGINS information_schema.PLUGINS      1
 
367
PROCESSLIST     information_schema.PROCESSLIST  1
 
368
REFERENTIAL_CONSTRAINTS information_schema.REFERENTIAL_CONSTRAINTS      1
 
369
SCHEMATA        information_schema.SCHEMATA     1
 
370
SESSION_STATUS  information_schema.SESSION_STATUS       1
 
371
SESSION_VARIABLES       information_schema.SESSION_VARIABLES    1
 
372
STATISTICS      information_schema.STATISTICS   1
 
373
TABLES  information_schema.TABLES       1
 
374
TABLE_CONSTRAINTS       information_schema.TABLE_CONSTRAINTS    1
 
375
alter database;
 
376
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your Drizzle server version for the right syntax to use near '' at line 1
 
377
alter database test;
 
378
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your Drizzle server version for the right syntax to use near '' at line 1
 
379
create table t1 (
 
380
f1 varchar(50),
 
381
f2 varchar(50) not null,
 
382
f3 varchar(50) default '',
 
383
f4 varchar(50) default NULL,
 
384
f5 bigint not null,
 
385
f6 bigint not null default 10,
 
386
f7 datetime not null,
 
387
f8 datetime default '2006-01-01'
 
388
);
 
389
select column_default from information_schema.columns where table_name= 't1';
 
390
column_default
 
391
NULL
 
392
NULL
 
393
 
 
394
NULL
 
395
NULL
 
396
10
 
397
NULL
 
398
2006-01-01 00:00:00
 
399
show columns from t1;
 
400
Field   Type    Null    Key     Default Extra
 
401
f1      varchar(50)     YES             NULL    
 
402
f2      varchar(50)     NO              NULL    
 
403
f3      varchar(50)     YES                     
 
404
f4      varchar(50)     YES             NULL    
 
405
f5      bigint  NO              NULL    
 
406
f6      bigint  NO              10      
 
407
f7      datetime        NO              NULL    
 
408
f8      datetime        YES             2006-01-01 00:00:00     
 
409
drop table t1;
 
410
show fields from information_schema.table_names;
 
411
ERROR 42S02: Unknown table 'table_names' in information_schema
 
412
show keys from information_schema.table_names;
 
413
ERROR 42S02: Unknown table 'table_names' in information_schema
 
414
SET max_heap_table_size = DEFAULT;
 
415
USE test;
 
416
End of 5.0 tests.
 
417
SELECT SCHEMA_NAME FROM INFORMATION_SCHEMA.SCHEMATA
 
418
WHERE SCHEMA_NAME ='information_schema';
 
419
SCHEMA_NAME
 
420
information_schema
 
421
SELECT TABLE_COLLATION FROM INFORMATION_SCHEMA.TABLES
 
422
WHERE TABLE_SCHEMA='mysql' and TABLE_NAME= 'db';
 
423
TABLE_COLLATION
 
424
select * from information_schema.columns where table_schema = NULL;
 
425
TABLE_CATALOG   TABLE_SCHEMA    TABLE_NAME      COLUMN_NAME     ORDINAL_POSITION        COLUMN_DEFAULT  IS_NULLABLE     DATA_TYPE       CHARACTER_MAXIMUM_LENGTH        CHARACTER_OCTET_LENGTH  NUMERIC_PRECISION       NUMERIC_SCALE   CHARACTER_SET_NAME      COLLATION_NAME  COLUMN_TYPE     COLUMN_KEY      EXTRA   PRIVILEGES      COLUMN_COMMENT  STORAGE FORMAT
 
426
select * from `information_schema`.`COLUMNS` where `TABLE_NAME` = NULL;
 
427
TABLE_CATALOG   TABLE_SCHEMA    TABLE_NAME      COLUMN_NAME     ORDINAL_POSITION        COLUMN_DEFAULT  IS_NULLABLE     DATA_TYPE       CHARACTER_MAXIMUM_LENGTH        CHARACTER_OCTET_LENGTH  NUMERIC_PRECISION       NUMERIC_SCALE   CHARACTER_SET_NAME      COLLATION_NAME  COLUMN_TYPE     COLUMN_KEY      EXTRA   PRIVILEGES      COLUMN_COMMENT  STORAGE FORMAT
 
428
select * from `information_schema`.`KEY_COLUMN_USAGE` where `TABLE_SCHEMA` = NULL;
 
429
CONSTRAINT_CATALOG      CONSTRAINT_SCHEMA       CONSTRAINT_NAME TABLE_CATALOG   TABLE_SCHEMA    TABLE_NAME      COLUMN_NAME     ORDINAL_POSITION        POSITION_IN_UNIQUE_CONSTRAINT   REFERENCED_TABLE_SCHEMA REFERENCED_TABLE_NAME   REFERENCED_COLUMN_NAME
 
430
select * from `information_schema`.`KEY_COLUMN_USAGE` where `TABLE_NAME` = NULL;
 
431
CONSTRAINT_CATALOG      CONSTRAINT_SCHEMA       CONSTRAINT_NAME TABLE_CATALOG   TABLE_SCHEMA    TABLE_NAME      COLUMN_NAME     ORDINAL_POSITION        POSITION_IN_UNIQUE_CONSTRAINT   REFERENCED_TABLE_SCHEMA REFERENCED_TABLE_NAME   REFERENCED_COLUMN_NAME
 
432
select * from `information_schema`.`REFERENTIAL_CONSTRAINTS` where `CONSTRAINT_SCHEMA` = NULL;
 
433
CONSTRAINT_CATALOG      CONSTRAINT_SCHEMA       CONSTRAINT_NAME UNIQUE_CONSTRAINT_CATALOG       UNIQUE_CONSTRAINT_SCHEMA        UNIQUE_CONSTRAINT_NAME  MATCH_OPTION    UPDATE_RULE     DELETE_RULE     TABLE_NAME      REFERENCED_TABLE_NAME
 
434
select * from `information_schema`.`REFERENTIAL_CONSTRAINTS` where `TABLE_NAME` = NULL;
 
435
CONSTRAINT_CATALOG      CONSTRAINT_SCHEMA       CONSTRAINT_NAME UNIQUE_CONSTRAINT_CATALOG       UNIQUE_CONSTRAINT_SCHEMA        UNIQUE_CONSTRAINT_NAME  MATCH_OPTION    UPDATE_RULE     DELETE_RULE     TABLE_NAME      REFERENCED_TABLE_NAME
 
436
select * from information_schema.schemata where schema_name = NULL;
 
437
CATALOG_NAME    SCHEMA_NAME     DEFAULT_CHARACTER_SET_NAME      DEFAULT_COLLATION_NAME  SQL_PATH
 
438
select * from `information_schema`.`STATISTICS` where `TABLE_SCHEMA` = NULL;
 
439
TABLE_CATALOG   TABLE_SCHEMA    TABLE_NAME      NON_UNIQUE      INDEX_SCHEMA    INDEX_NAME      SEQ_IN_INDEX    COLUMN_NAME     COLLATION       CARDINALITY     SUB_PART        PACKED  NULLABLE        INDEX_TYPE      COMMENT INDEX_COMMENT
 
440
select * from `information_schema`.`STATISTICS` where `TABLE_NAME` = NULL;
 
441
TABLE_CATALOG   TABLE_SCHEMA    TABLE_NAME      NON_UNIQUE      INDEX_SCHEMA    INDEX_NAME      SEQ_IN_INDEX    COLUMN_NAME     COLLATION       CARDINALITY     SUB_PART        PACKED  NULLABLE        INDEX_TYPE      COMMENT INDEX_COMMENT
 
442
select * from information_schema.tables where table_schema = NULL;
 
443
TABLE_CATALOG   TABLE_SCHEMA    TABLE_NAME      TABLE_TYPE      ENGINE  VERSION ROW_FORMAT      TABLE_ROWS      AVG_ROW_LENGTH  DATA_LENGTH     MAX_DATA_LENGTH INDEX_LENGTH    DATA_FREE       AUTO_INCREMENT  CREATE_TIME     UPDATE_TIME     CHECK_TIME      TABLE_COLLATION CHECKSUM        CREATE_OPTIONS  TABLE_COMMENT
 
444
select * from information_schema.tables where table_catalog = NULL;
 
445
TABLE_CATALOG   TABLE_SCHEMA    TABLE_NAME      TABLE_TYPE      ENGINE  VERSION ROW_FORMAT      TABLE_ROWS      AVG_ROW_LENGTH  DATA_LENGTH     MAX_DATA_LENGTH INDEX_LENGTH    DATA_FREE       AUTO_INCREMENT  CREATE_TIME     UPDATE_TIME     CHECK_TIME      TABLE_COLLATION CHECKSUM        CREATE_OPTIONS  TABLE_COMMENT
 
446
select * from information_schema.tables where table_name = NULL;
 
447
TABLE_CATALOG   TABLE_SCHEMA    TABLE_NAME      TABLE_TYPE      ENGINE  VERSION ROW_FORMAT      TABLE_ROWS      AVG_ROW_LENGTH  DATA_LENGTH     MAX_DATA_LENGTH INDEX_LENGTH    DATA_FREE       AUTO_INCREMENT  CREATE_TIME     UPDATE_TIME     CHECK_TIME      TABLE_COLLATION CHECKSUM        CREATE_OPTIONS  TABLE_COMMENT
 
448
select * from `information_schema`.`TABLE_CONSTRAINTS` where `TABLE_SCHEMA` = NULL;
 
449
CONSTRAINT_CATALOG      CONSTRAINT_SCHEMA       CONSTRAINT_NAME TABLE_SCHEMA    TABLE_NAME      CONSTRAINT_TYPE
 
450
select * from `information_schema`.`TABLE_CONSTRAINTS` where `TABLE_NAME` = NULL;
 
451
CONSTRAINT_CATALOG      CONSTRAINT_SCHEMA       CONSTRAINT_NAME TABLE_SCHEMA    TABLE_NAME      CONSTRAINT_TYPE