btree_txn_begin
ns->indx_txn = btree_txn_begin(indx_db, 0);
if ((txn = btree_txn_begin(bt, 0)) == NULL)
if ((txn = btree_txn_begin(bt, 0)) == NULL)
if ((txn = btree_txn_begin(bt, 0)) == NULL)
if ((txnc = btree_txn_begin(btc, 0)) == NULL)
struct btree_txn *btree_txn_begin(struct btree *bt, int rdonly);
if ((*data_txn = btree_txn_begin(ns->data_db, rdonly)) == NULL ||
(*indx_txn = btree_txn_begin(ns->indx_db, rdonly)) == NULL) {