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| author | Sergey Petrunya <psergey@askmonty.org> | 2013-09-20 14:47:38 +0400 |
|---|---|---|
| committer | Sergey Petrunya <psergey@askmonty.org> | 2013-09-20 14:47:38 +0400 |
| commit | 422c55a2404a7ec31d43962cdda0d782ef32dc45 (patch) | |
| tree | 4310e7a0342103f322325b1c936374a0600cc178 /sql/multi_range_read.h | |
| parent | 33f807fd91826013499c996f9515838cf2c6d0c5 (diff) | |
| download | mariadb-git-422c55a2404a7ec31d43962cdda0d782ef32dc45.tar.gz | |
MDEV-5037: Server crash on a JOIN on a derived table with join_cache_level > 2
- The crash was caused because the optimizer called handler->multi_range_read_info()
on a derived temporary table. That table has been created, but not opened yet.
Because of that, handler::table was NULL, which caused crash.
Fixed by changing DS-MRR methods to use handler::table_share instead.
handler::table_share is set in handler ctor, so this should be safe.
Diffstat (limited to 'sql/multi_range_read.h')
| -rw-r--r-- | sql/multi_range_read.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sql/multi_range_read.h b/sql/multi_range_read.h index dcba92aab16..10715817308 100644 --- a/sql/multi_range_read.h +++ b/sql/multi_range_read.h @@ -627,7 +627,7 @@ private: COST_VECT *cost); bool get_disk_sweep_mrr_cost(uint keynr, ha_rows rows, uint flags, uint *buffer_size, COST_VECT *cost); - bool check_cpk_scan(THD *thd, uint keyno, uint mrr_flags); + bool check_cpk_scan(THD *thd, TABLE_SHARE *share, uint keyno, uint mrr_flags); bool setup_buffer_sharing(uint key_size_in_keybuf, key_part_map key_tuple_map); |