Question

我有一个postgres表：

CREATE TABLE public.foo
(
    id uuid NOT NULL DEFAULT gen_random_uuid(),
    foo timestamp with time zone[],
    bar timestamp with time zone
)

然后我查询此表并将结果扫描为以下值：

var res []myResStruct
rows, err := db.Query(`sql goes here`, &params)
if err != nil {
    log.Printf("err querying: %v\n", err)
    panic(err)
}
defer rows.Close()

for rows.Next() {
    var (
        id   uuid.UUID
        foo  []uint8
        bar  time.Time
    )
    if err := rows.Scan(&id, &foo, &bar); err != nil {
        log.Printf("err scanning: %v\n", err)
        panic(err)
    }

    // note: I hate this, but golang's sql driver doesn't support \
    //       arrays of timestamps?
    s := string(foo)
    s = strings.Replace(s, "{", "", -1)
    s = strings.Replace(s, "}", "", -1)
    s = strings.Replace(s, "\"", "", -1)
    z := strings.Split(s, ",")
    var tmpFoo []time.Time
    for _, v := range z {
        t, _ := time.Parse("2006-01-02 15:04:05-07", v)
        tmpFoo = append(tmpFoo, t)
    }

    // note @adam-hanna: is there a way to know the length of results \
    //                   so I can create a slice of proper length?
    res = append(res, &myResStruct{
        id:   id,
        foo:  tmpFoo,
        bar:  bar,
    })
}

if err := rows.Err(); err != nil {
    log.Printf("rows.Error(): %v\n", err)
    panic(err)
}

为什么我必须使用[]uint8 foo，但我可以time.Time使用bar？有没有更好的办法？仅供参考 - 我使用lib/pq。

sql支持[] time.Time？

0 个答案: