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MDEV-37252 Do not check is_key_used in get_index_for_order

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This allows UPDATE to use ORDER BY indexes in the update columns.
This commit is contained in:
Yuchen Pei
2025-07-17 15:15:36 +10:00
parent ce7ab467db
commit 7215fe7894
3 changed files with 4 additions and 5 deletions
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3
sql/sql_select.cc
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@@ -33411,8 +33411,7 @@ uint get_index_for_order(ORDER *order, TABLE *table, SQL_SELECT *select,
double new_cost;
if (test_if_cheaper_ordering(FALSE, NULL, order, table,
table->keys_in_use_for_order_by, -1, limit,
&key, &direction, &limit, &new_cost) &&
!is_key_used(table, key, table->write_set))
&key, &direction, &limit, &new_cost))
{
*need_sort= FALSE;
*scanned_limit= limit;