ensure tables are created

fix https://github.com/chrislusf/seaweedfs/issues/1957

weed/filer/abstract_sql/abstract_sql_store.go

@@ -36,6 +36,8 @@ func (store *AbstractSqlStore) OnBucketCreation(bucket string) {
 	store.dbsLock.Lock()
 	defer store.dbsLock.Unlock()
 
+	store.CreateTable(context.Background(), bucket)
+
 	if store.dbs == nil {
 		return
 	}
@@ -45,6 +47,8 @@ func (store *AbstractSqlStore) OnBucketDeletion(bucket string) {
 	store.dbsLock.Lock()
 	defer store.dbsLock.Unlock()
 
+	store.deleteTable(context.Background(), bucket)
+
 	if store.dbs == nil {
 		return
 	}