database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-12-24 11:21:21 +03:00
Code Activity

WL#3700: Handler API change: all index search methods - that is,

Browse Source 
index_read(), index_read_idx(), index_read_last(), and
records_in_range() - instead of 'uint keylen' argument take
'ulonglong keypart_map', a bitmap showing which keyparts are
present in the key value.
Fallback method is provided for handlers that are lagging behind.
This commit is contained in:
unknown
2007-01-29 10:40:26 +01:00
parent 6e1ba88418
commit 4e8b49d656
58 changed files with 483 additions and 441 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
sql/table.cc
View File

@@ -1223,12 +1223,12 @@ static int open_binary_frm(THD *thd, TABLE_SHARE *share, uchar *head,
if ((int) (share->next_number_index= (uint)
find_ref_key(share->key_info, share->keys,
share->default_values, reg_field,
&share->next_number_key_offset)) < 0)
&share->next_number_key_offset,
&share->next_number_keypart)) < 0)
{
/* Wrong field definition */
DBUG_ASSERT(0);
reg_field->unireg_check= Field::NONE; /* purecov: inspected */
share->found_next_number_field= 0;
error= 4;
goto err;
}
else
reg_field->flags |= AUTO_INCREMENT_FLAG;
@@ -2245,6 +2245,30 @@ char *get_field(MEM_ROOT *mem, Field *field)
return to;
}
/*
DESCRIPTION
given a buffer with a key value, and a map of keyparts
that are present in this value, returns the length of the value
*/
uint calculate_key_len(TABLE *table, uint key, const byte *buf,
ulonglong keypart_map)
{
/* works only with key prefixes */
DBUG_ASSERT(((keypart_map + 1) & keypart_map) == 0);
KEY *key_info= table->s->key_info+key;
KEY_PART_INFO *key_part= key_info->key_part;
KEY_PART_INFO *end_key_part= key_part + key_info->key_parts;
uint length= 0;
while (key_part < end_key_part && keypart_map)
{
length+= key_part->store_length;
keypart_map >>= 1;
key_part++;
}
return length;
}
/*
Check if database name is valid
@@ -3936,7 +3960,7 @@ void st_table::mark_auto_increment_column()
*/
bitmap_set_bit(read_set, found_next_number_field->field_index);
bitmap_set_bit(write_set, found_next_number_field->field_index);
if (s->next_number_key_offset)
if (s->next_number_keypart)
mark_columns_used_by_index_no_reset(s->next_number_index, read_set);
file->column_bitmaps_signal();
}