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MDEV-35296 DESC does not work in ORDER BY with vector key

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only user vector indexes for ORDER BY ... ASC
This commit is contained in:
Sergei Golubchik
2024-10-30 21:50:29 +01:00
parent 7feec30939
commit ad33ffc0b5
3 changed files with 22 additions and 1 deletions
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13
mysql-test/main/vector2.result
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@@ -356,3 +356,16 @@ a vec_totext(v)
8 [33]
9 [33]
drop table t1;
#
# MDEV-35296 DESC does not work in ORDER BY with vector key
#
create table t (v vector(1) not null, vector(v));
insert into t select vec_fromtext(concat('[',seq,']')) FROM seq_1_to_10;
select vec_totext(v) from t order by vec_distance_euclidean(v,vec_fromtext('[0]')) desc limit 5;
vec_totext(v)
[10]
[9]
[8]
[7]
[6]
drop table t;

8
mysql-test/main/vector2.test
View File

@@ -257,3 +257,11 @@ update t1 set v = vec_fromtext(concat('[33]')) where a <= 15;
--sorted_result
select a, vec_totext(v) from t1 order by vec_distance_euclidean(v,vec_fromtext('[33]')) limit 25;
drop table t1;
--echo #
--echo # MDEV-35296 DESC does not work in ORDER BY with vector key
--echo #
create table t (v vector(1) not null, vector(v));
insert into t select vec_fromtext(concat('[',seq,']')) FROM seq_1_to_10;
select vec_totext(v) from t order by vec_distance_euclidean(v,vec_fromtext('[0]')) desc limit 5;
drop table t;

2
sql/sql_select.cc
View File

@@ -26486,7 +26486,7 @@ static int test_if_order_by_key(JOIN *join, ORDER *order, TABLE *table,
if ((*order->item)->real_item()->type() != Item::FIELD_ITEM)
{
if (order->next)
if (order->next || order->direction != ORDER::ORDER_ASC)
DBUG_RETURN(0);
DBUG_RETURN((*order->item)->part_of_sortkey().is_set(idx));