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

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into dl145c.mysql.com:/home/ndbdev/tomas/mysql-5.1


sql/item.cc:
  Auto merged
sql/opt_range.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
This commit is contained in:
unknown
2005-06-15 00:57:23 +02:00
parent a9ba149a4f 970e20b7fe
commit a778fb5159
17 changed files with 248 additions and 31 deletions
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22
sql/opt_range.cc
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@ -7617,8 +7617,8 @@ void cost_group_min_max(TABLE* table, KEY *index_info, uint used_key_parts,
*records= num_groups;
DBUG_PRINT("info",
("records=%u, keys/block=%u, keys/group=%u, records=%u, blocks=%u",
table_records, keys_per_block, keys_per_group, records,
("table rows=%u, keys/block=%u, keys/group=%u, result rows=%u, blocks=%u",
table_records, keys_per_block, keys_per_group, *records,
num_blocks));
DBUG_VOID_RETURN;
}
@ -8125,6 +8125,15 @@ int QUICK_GROUP_MIN_MAX_SELECT::get_next()
DBUG_ASSERT((have_max && !have_min) ||
(have_max && have_min && (max_res == 0)));
}
/*
If this is a just a GROUP BY or DISTINCT without MIN or MAX and there
are equality predicates for the key parts after the group, find the
first sub-group with the extended prefix.
*/
if (!have_min && !have_max && key_infix_len > 0)
result= file->index_read(record, group_prefix, real_prefix_len,
HA_READ_KEY_EXACT);
result= have_min ? min_res : have_max ? max_res : result;
}
while (result == HA_ERR_KEY_NOT_FOUND && is_last_prefix != 0);
@ -8151,9 +8160,8 @@ int QUICK_GROUP_MIN_MAX_SELECT::get_next()
QUICK_GROUP_MIN_MAX_SELECT::next_min()
DESCRIPTION
Load the prefix of the next group into group_prefix and find the minimal
key within this group such that the key satisfies the query conditions and
NULL semantics. The found key is loaded into this->record.
Find the minimal key within this group such that the key satisfies the query
conditions and NULL semantics. The found key is loaded into this->record.
IMPLEMENTATION
Depending on the values of min_max_ranges.elements, key_infix_len, and
@ -8237,9 +8245,7 @@ int QUICK_GROUP_MIN_MAX_SELECT::next_min()
QUICK_GROUP_MIN_MAX_SELECT::next_max()
DESCRIPTION
If there was no previous next_min call to determine the next group prefix,
then load the next prefix into group_prefix, then lookup the maximal key of
the group, and store it into this->record.
Lookup the maximal key of the group, and store it into this->record.
RETURN
0 on success