diff options
Diffstat (limited to 'sql/lock.cc')
| -rw-r--r-- | sql/lock.cc | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/sql/lock.cc b/sql/lock.cc index a3744d7f000..3a2001fbc34 100644 --- a/sql/lock.cc +++ b/sql/lock.cc @@ -729,6 +729,9 @@ static int unlock_external(THD *thd, TABLE **table,uint count) - GET_LOCK_STORE_LOCKS : Store lock info in TABLE - GET_LOCK_SKIP_SEQUENCES : Ignore sequences (for temporary unlock) - GET_LOCK_ON_THD : Store lock in thd->mem_root + + Temporary tables are not locked (as these are single user), except for + TRANSACTIONAL_TMP_TABLES as locking is needed to handle transactions. */ MYSQL_LOCK *get_lock_data(THD *thd, TABLE **table_ptr, uint count, uint flags) @@ -745,8 +748,8 @@ MYSQL_LOCK *get_lock_data(THD *thd, TABLE **table_ptr, uint count, uint flags) { TABLE *t= table_ptr[i]; - if (t->s->tmp_table != NON_TRANSACTIONAL_TMP_TABLE && - t->s->tmp_table != INTERNAL_TMP_TABLE && + if ((likely(!t->s->tmp_table) || + (t->s->tmp_table == TRANSACTIONAL_TMP_TABLE)) && (!(flags & GET_LOCK_SKIP_SEQUENCES) || t->s->sequence == 0)) { lock_count+= t->file->lock_count(); @@ -774,13 +777,13 @@ MYSQL_LOCK *get_lock_data(THD *thd, TABLE **table_ptr, uint count, uint flags) for (i=0 ; i < count ; i++) { - TABLE *table; + TABLE *table= table_ptr[i]; enum thr_lock_type lock_type; THR_LOCK_DATA **locks_start; - table= table_ptr[i]; - if (table->s->tmp_table == NON_TRANSACTIONAL_TMP_TABLE || - table->s->tmp_table == INTERNAL_TMP_TABLE || - ((flags & GET_LOCK_SKIP_SEQUENCES) && table->s->sequence)) + + if (!((likely(!table->s->tmp_table) || + (table->s->tmp_table == TRANSACTIONAL_TMP_TABLE)) && + (!(flags & GET_LOCK_SKIP_SEQUENCES) || table->s->sequence == 0))) continue; lock_type= table->reginfo.lock_type; DBUG_ASSERT(lock_type != TL_WRITE_DEFAULT && lock_type != TL_READ_DEFAULT); |