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| author | Igor Babaev <igor@askmonty.org> | 2023-01-23 15:54:49 -0800 |
|---|---|---|
| committer | Igor Babaev <igor@askmonty.org> | 2023-01-24 08:46:41 -0800 |
| commit | f513d715382a63415c9342f1cae75be75b441f98 (patch) | |
| tree | 86cf43a22f8868f6bbdfe7e54886aa381879ea15 /sql/item.cc | |
| parent | d69e835787f9ce9848cb6c2a5343887dd0eec2ce (diff) | |
| download | mariadb-git-f513d715382a63415c9342f1cae75be75b441f98.tar.gz | |
MDEV-30081 Crash with splitting from constant mergeable derived table
This bug manifested itself in very rare situations when splitting
optimization was applied to a materialized derived table with group clause
by key over a constant meargeable derived table that was in inner part of
an outer join. In this case the used tables for the key to access the
split table incorrectly was evaluated to a not empty table map.
Approved by Oleksandr Byelkin <sanja@mariadb.com>
Diffstat (limited to 'sql/item.cc')
| -rw-r--r-- | sql/item.cc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sql/item.cc b/sql/item.cc index 02220fd56bd..9ecbefaafb9 100644 --- a/sql/item.cc +++ b/sql/item.cc @@ -10838,7 +10838,7 @@ table_map Item_direct_view_ref::used_tables() const table_map used= (*ref)->used_tables(); return (used ? used : - ((null_ref_table != NO_NULL_TABLE) ? + (null_ref_table != NO_NULL_TABLE && !null_ref_table->const_table ? null_ref_table->map : (table_map)0 )); } |