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Fixed bug #20108.

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Any default value for a enum fields over UCS2 charsets was corrupted
when we put it into the frm file, as it had been overwritten by its
HEX representation.
To fix it now we save a copy of structure that represents the enum
type and when putting the default values we use this copy.
This commit is contained in:
igor@rurik.mysql.com
2006-09-20 09:46:12 -07:00
parent 294c0ccaa9
commit d957636471
4 changed files with 76 additions and 7 deletions
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39
sql/unireg.cc
View File

@ -190,13 +190,19 @@ bool mysql_create_frm(THD *thd, my_string file_name,
goto err3;
{
/* Unescape all UCS2 intervals: were escaped in pack_headers */
/*
Restore all UCS2 intervals.
HEX representation of them is not needed anymore.
*/
List_iterator<create_field> it(create_fields);
create_field *field;
while ((field=it++))
{
if (field->interval && field->charset->mbminlen > 1)
unhex_type2(field->interval);
if (field->save_interval)
{
field->interval= field->save_interval;
field->save_interval= 0;
}
}
}
DBUG_RETURN(0);
@ -452,18 +458,36 @@ static bool pack_header(uchar *forminfo, enum db_type table_type,
reclength=(uint) (field->offset+ data_offset + length);
n_length+= (ulong) strlen(field->field_name)+1;
field->interval_id=0;
field->save_interval= 0;
if (field->interval)
{
uint old_int_count=int_count;
if (field->charset->mbminlen > 1)
{
/* Escape UCS2 intervals using HEX notation */
/*
Escape UCS2 intervals using HEX notation to avoid
problems with delimiters between enum elements.
As the original representation is still needed in
the function make_empty_rec to create a record of
filled with default values it is saved in save_interval
The HEX representation is created from this copy.
*/
field->save_interval= field->interval;
field->interval= (TYPELIB*) sql_alloc(sizeof(TYPELIB));
*field->interval= *field->save_interval;
field->interval->type_names=
(const char **) sql_alloc(sizeof(char*) *
(field->interval->count+1));
field->interval->type_names[field->interval->count]= 0;
field->interval->type_lengths=
(uint *) sql_alloc(sizeof(uint) * field->interval->count);
for (uint pos= 0; pos < field->interval->count; pos++)
{
char *dst;
uint length= field->interval->type_lengths[pos], hex_length;
const char *src= field->interval->type_names[pos];
uint length= field->save_interval->type_lengths[pos], hex_length;
const char *src= field->save_interval->type_names[pos];
const char *srcend= src + length;
hex_length= length * 2;
field->interval->type_lengths[pos]= hex_length;
@ -715,7 +739,8 @@ static bool make_empty_rec(File file,enum db_type table_type,
field->charset,
field->geom_type,
field->unireg_check,
field->interval,
field->save_interval ? field->save_interval :
field->interval,
field->field_name,
&table);