/*
 * cm_fx_avg_dbio.pgc - cm 모듈 DB 접근 함수 (cm_fx_avg_dbio), archived into libcmdbio.a.
 * ECPG (EXEC SQL) functions; run on the caller's XA branch. No EXEC SQL CONNECT.
 * 환율 평균.
 */
#include <string.h>
#include <userlog.h>
#include "cm_fx_avg_dbio.h"

long cmdb_fx_avg(const char *bizdate)
{
    EXEC SQL BEGIN DECLARE SECTION;
    char h_bizdate[16];
    long h_sum = 0, h_cnt = 0;
    EXEC SQL END DECLARE SECTION;
    strncpy(h_bizdate, bizdate, sizeof(h_bizdate)-1); h_bizdate[sizeof(h_bizdate)-1] = 0;
    EXEC SQL SELECT coalesce(sum(rate_bps),0), count(*) INTO :h_sum, :h_cnt
        FROM cm_fx_rate WHERE base_date = :h_bizdate;
    if (sqlca.sqlcode < 0) return -1;
    if (h_cnt <= 0) return 0;
    return h_sum / h_cnt;
}
