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Bug#4594: column index make = failed for gbk, but like works

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Fix for HEAP+HASH prefix keys.
This commit is contained in:
unknown 2004-08-23 20:12:39 +05:00
commit c3c483e091
3 changed files with 33 additions and 4 deletions
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15
sql/key.cc
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@ -211,10 +211,17 @@ bool key_cmp_if_same(TABLE *table,const byte *key,uint idx,uint key_length)
if (!(key_part->key_type & (FIELDFLAG_NUMBER+FIELDFLAG_BINARY+
FIELDFLAG_PACK)))
{
if (my_strnncoll(key_part->field->charset(),
(const uchar*) key, length,
(const uchar*) table->record[0]+key_part->offset,
length))
CHARSET_INFO *cs= key_part->field->charset();
uint char_length= key_part->length / cs->mbmaxlen;
const byte *pos= table->record[0] + key_part->offset;
if (length > char_length)
{
char_length= my_charpos(cs, pos, pos + length, char_length);
set_if_smaller(char_length, length);
}
if (cs->coll->strnncollsp(cs,
(const uchar*) key, length,
(const uchar*) pos, char_length))
return 1;
}
else if (memcmp(key,table->record[0]+key_part->offset,length))