rem: int db_delete(db_con_t* _h, db_key_t* _k, db_op_t* _o, db_val_t* _v, int _n)
add: int db_delete(db_con_t* con, db_key_t* keys, db_op_t* ops, db_val_t* vals, int n)
context: int db_delete(db_con_t* _h, db_key_t* _k, db_op_t* _o, db_val_t* _v, int _n){	int off;	off = snprintf(sql_buf, SQL_BUF_LEN, "delete from %s", CON_TABLE(_h));	if (_n) {		off += snprintf(sql_buf + off, SQL_BUF_LEN - off, " where ");		off += print_where(sql_buf + off, SQL_BUF_LEN - off, _k,			_o, _v, _n);	}	if(begin_transaction(_h, sql_buf)) return(-1);	if (submit_query(_h, sql_buf) < 0) {		LOG(L_ERR, "db_delete(): Error while deleting\n");		return -2;	}	free_query(_h);	commit_transaction(_h);	return(0);}