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MDEV-15149 Assert upon concurrent creating / querying sequences

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Problem was that sequence_insert closed and reopened the like table
without proper locking.  Fixed by ensuring that the like table is
not reopened in sequence_insert
This commit is contained in:
Monty
2018-03-29 12:25:17 +03:00
parent e2664ee836
commit cd93eeeb1d
4 changed files with 69 additions and 0 deletions
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2
sql/table_cache.cc
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@ -460,6 +460,7 @@ static TABLE *tc_acquire_table(THD *thd, TDC_element *element)
void tc_release_table(TABLE *table)
{
uint32 i= table->instance;
DBUG_ENTER("tc_release_table");
DBUG_ASSERT(table->in_use);
DBUG_ASSERT(table->file);
@ -478,6 +479,7 @@ void tc_release_table(TABLE *table)
tc[i].free_tables.push_back(table);
mysql_mutex_unlock(&tc[i].LOCK_table_cache);
}
DBUG_VOID_RETURN;
}