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Fix for bug#11057 information_schema: columns table has some questionable contents

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fixed BLOB, TEXT(wrong maximum length), BIT and integer types(wrong numeric_precision value)
This commit is contained in:
gluh@eagle.intranet.mysql.r18.ru 2005-07-19 14:30:32 +05:00
parent 2b1aa257d3
commit d1bc1b7c0e
3 changed files with 59 additions and 6 deletions
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27
mysql-test/r/information_schema.result
View File

@ -153,7 +153,7 @@ c varchar(64) utf8_general_ci NO select,insert,update,references
select * from information_schema.COLUMNS where table_name="t1"
and column_name= "a";
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
NULL mysqltest t1 a 1 NULL YES int NULL NULL 11 0 NULL NULL int(11) select,insert,update,references
NULL mysqltest t1 a 1 NULL YES int NULL NULL 10 NULL NULL NULL int(11) select,insert,update,references
show columns from mysqltest.t1 where field like "%a%";
Field Type Null Key Default Extra
a int(11) YES NULL
@ -523,7 +523,7 @@ c float(5,2) NULL NULL 5 2
d decimal(6,4) NULL NULL 6 4
e float NULL NULL 12 NULL
f decimal(6,3) NULL NULL 6 3
g int(11) NULL NULL 11 0
g int(11) NULL NULL 10 NULL
h double(10,3) NULL NULL 10 3
i double NULL NULL 22 NULL
drop table t1;
@ -844,3 +844,26 @@ drop procedure p2;
show create database information_schema;
Database Create Database
information_schema CREATE DATABASE `information_schema` /*!40100 DEFAULT CHARACTER SET utf8 */
create table t1(f1 LONGBLOB, f2 LONGTEXT);
select column_name,data_type,CHARACTER_OCTET_LENGTH,
CHARACTER_MAXIMUM_LENGTH
from information_schema.columns
where table_name='t1';
column_name data_type CHARACTER_OCTET_LENGTH CHARACTER_MAXIMUM_LENGTH
f1 longblob 4294967295 4294967295
f2 longtext 4294967295 4294967295
drop table t1;
create table t1(f1 tinyint, f2 SMALLINT, f3 mediumint, f4 int,
f5 BIGINT, f6 BIT, f7 bit(64));
select column_name, NUMERIC_PRECISION, NUMERIC_SCALE
from information_schema.columns
where table_name='t1';
column_name NUMERIC_PRECISION NUMERIC_SCALE
f1 3 NULL
f2 5 NULL
f3 7 NULL
f4 10 NULL
f5 19 NULL
f6 1 NULL
f7 64 NULL
drop table t1;

16
mysql-test/t/information_schema.test
View File

@ -571,3 +571,19 @@ drop procedure p2;
# Bug #9434 SHOW CREATE DATABASE information_schema;
#
show create database information_schema;
#
# Bug #11057 information_schema: columns table has some questionable contents
#
create table t1(f1 LONGBLOB, f2 LONGTEXT);
select column_name,data_type,CHARACTER_OCTET_LENGTH,
CHARACTER_MAXIMUM_LENGTH
from information_schema.columns
where table_name='t1';
drop table t1;
create table t1(f1 tinyint, f2 SMALLINT, f3 mediumint, f4 int,
f5 BIGINT, f6 BIT, f7 bit(64));
select column_name, NUMERIC_PRECISION, NUMERIC_SCALE
from information_schema.columns
where table_name='t1';
drop table t1;

22
sql/sql_show.cc
View File

@ -2377,6 +2377,7 @@ static int get_schema_column_record(THD *thd, struct st_table_list *tables,
{
const char *tmp_buff;
byte *pos;
bool is_blob;
uint flags=field->flags;
char tmp[MAX_FIELD_WIDTH];
char tmp1[MAX_FIELD_WIDTH];
@ -2455,12 +2456,14 @@ static int get_schema_column_record(THD *thd, struct st_table_list *tables,
"NO" : "YES");
table->field[6]->store((const char*) pos,
strlen((const char*) pos), cs);
if (field->has_charset())
is_blob= (field->type() == FIELD_TYPE_BLOB);
if (field->has_charset() || is_blob)
{
table->field[8]->store((longlong) field->field_length/
field->charset()->mbmaxlen);
longlong c_octet_len= is_blob ? (longlong) field->max_length() :
(longlong) field->max_length()/field->charset()->mbmaxlen;
table->field[8]->store(c_octet_len);
table->field[8]->set_notnull();
table->field[9]->store((longlong) field->field_length);
table->field[9]->store((longlong) field->max_length());
table->field[9]->set_notnull();
}
@ -2488,6 +2491,17 @@ static int get_schema_column_record(THD *thd, struct st_table_list *tables,
case FIELD_TYPE_LONG:
case FIELD_TYPE_LONGLONG:
case FIELD_TYPE_INT24:
{
table->field[10]->store((longlong) field->max_length() - 1);
table->field[10]->set_notnull();
break;
}
case FIELD_TYPE_BIT:
{
table->field[10]->store((longlong) field->max_length());
table->field[10]->set_notnull();
break;
}
case FIELD_TYPE_FLOAT:
case FIELD_TYPE_DOUBLE:
{