append

此函数将提供的值添加到序列的末尾。

    MCO_RET	classname_fieldname_append(
    	/*IN*/ classname *handle, 
        /*IN*/ TYPE *values, 
        /*IN*/ mco_size_t n_items
    );

参数

handle

classname

指向类名句柄的指针。

values

TYPE

指向序列中第一个值的指针。

n_items

mco_size_t

要从值中添加到序列中的元素数目。

返回

MCO_S_OK

输入值成功。

MCO_E_ACCESS

该类处理的事务范围是 MCO_READ_ONLY 。

示例

    void populate_database(mco_db_h db)
    {
        mco_trans_h trans;
        Quote quote;
        Tick tick;
        MCO_RET rc;
        char buff[15];
        int i;
 
        for (i = 0;i < N_QUOTES; i++) 
        {
            CHECK(mco_trans_start(db, MCO_READ_WRITE, MCO_TRANS_FOREGROUND, &trans));
            generate_random_quote(&tick);
            rc = Quote_by_sym_find(trans, tick.symbol, strlen(tick.symbol), &quote);
            if (rc == MCO_S_NOTFOUND) 
            {
                CHECK(Quote_new(trans, &quote));
                CHECK(Quote_symbol_put(&quote, tick.symbol, strlen(tick.symbol)));
            } else {
                CHECK(rc);
            }
            CHECK(Quote_day_append(&quote, &tick.day, 1));
            CHECK(Quote_open_append(&quote, &tick.open, 1));
            CHECK(Quote_close_append(&quote, &tick.close, 1));
            CHECK(Quote_high_append(&quote, &tick.high, 1));
            CHECK(Quote_low_append(&quote, &tick.low, 1));
            CHECK(Quote_volume_append(&quote, &tick.volume, 1));
            sprintf(buff, "Day:%d", tick.day);
            CHECK(Quote_day_str_append(&quote, buff, 1));
            CHECK(mco_trans_commit(trans));
        }
    }