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| author | Marko Mäkelä <marko.makela@mariadb.com> | 2018-02-04 13:11:49 +0200 |
|---|---|---|
| committer | Marko Mäkelä <marko.makela@mariadb.com> | 2018-02-04 13:11:49 +0200 |
| commit | d6ed077fc82c2f4d20895db9a6b16ca295f23c33 (patch) | |
| tree | e87770a5def3942cbe5aee2c325ab62921560ba4 | |
| parent | c8299e6278e42bdd2540e75305ba4effb7259f6e (diff) | |
| download | mariadb-git-d6ed077fc82c2f4d20895db9a6b16ca295f23c33.tar.gz | |
Clarify a comment after MDEV-15061
| -rw-r--r-- | storage/innobase/lock/lock0lock.cc | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/storage/innobase/lock/lock0lock.cc b/storage/innobase/lock/lock0lock.cc index d8d01f88a05..3d66e50cce9 100644 --- a/storage/innobase/lock/lock0lock.cc +++ b/storage/innobase/lock/lock0lock.cc @@ -5853,8 +5853,11 @@ lock_rec_block_validate( buf_block_t* block; mtr_t mtr; - /* Make sure that the tablespace is not deleted while we are - trying to access the page. */ + /* Transactional locks should never refer to dropped + tablespaces, because all DDL operations that would drop or + discard or rebuild a tablespace do hold an exclusive table + lock, which would conflict with any locks referring to the + tablespace from other transactions. */ if (fil_space_t* space = fil_space_acquire(space_id)) { dberr_t err = DB_SUCCESS; mtr_start(&mtr); |