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Merge abarkov@bk-internal.mysql.com:/home/bk/mysql-5.0

Browse source 
into mysql.com:/usr/home/bar/mysql-5.0
This commit is contained in:
unknown 2005-06-03 11:20:43 +05:00
commit 8d0d79eda3
3 changed files with 18 additions and 7 deletions
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3
mysql-test/r/ctype_utf8.result
View file

@ -888,3 +888,6 @@ NULL
select ifnull(NULL, _utf8'string');
ifnull(NULL, _utf8'string')
string
create table t1 (a varchar(255)) default character set utf8;
insert into t1 values (1.0);
drop table t1;

7
mysql-test/t/ctype_utf8.test
View file

@ -724,3 +724,10 @@ select ifnull(a,'') from t1;
drop table t1;
select repeat(_utf8'+',3) as h union select NULL;
select ifnull(NULL, _utf8'string');
#
# Bug#10714: Inserting double value into utf8 column crashes server
#
create table t1 (a varchar(255)) default character set utf8;
insert into t1 values (1.0);
drop table t1;

15
sql/field.cc
View file

@ -5858,31 +5858,32 @@ int Field_str::store(double nr)
char buff[DOUBLE_TO_STRING_CONVERSION_BUFFER_SIZE];
uint length;
bool use_scientific_notation= TRUE;
uint char_length= field_length / charset()->mbmaxlen;
/*
Check fabs(nr) against longest value that can be stored in field,
which depends on whether the value is < 1 or not, and negative or not
*/
double anr= fabs(nr);
int neg= (nr < 0.0) ? 1 : 0;
if (field_length > 4 && field_length < 32 &&
(anr < 1.0 ? anr > 1/(log_10[max(0,(int) field_length-neg-2)]) /* -2 for "0." */
: anr < log_10[field_length-neg]-1))
if (char_length > 4 && char_length < 32 &&
(anr < 1.0 ? anr > 1/(log_10[max(0,(int) char_length-neg-2)]) /* -2 for "0." */
: anr < log_10[char_length-neg]-1))
use_scientific_notation= FALSE;
length= (uint) my_sprintf(buff, (buff, "%-.*g",
(use_scientific_notation ?
max(0, (int)field_length-neg-5) :
field_length),
max(0, (int)char_length-neg-5) :
char_length),
nr));
/*
+1 below is because "precision" in %g above means the
max. number of significant digits, not the output width.
Thus the width can be larger than number of significant digits by 1
(for decimal point)
the test for field_length < 5 is for extreme cases,
the test for char_length < 5 is for extreme cases,
like inserting 500.0 in char(1)
*/
DBUG_ASSERT(field_length < 5 || length <= field_length+1);
DBUG_ASSERT(char_length < 5 || length <= char_length+1);
return store((const char *) buff, length, charset());
}