使用SQL语句查询到时间类型(包括Datetime、Date和Time)数据后,您可以需要根据实际获取具体数据。
前提条件
接口说明
获取不同时间类型的接口说明请参见下表,请根据实际时间类型选择。
重要
getDateTime
获取的时间时区默认为UTC时区,请根据需要进行时区转换。
时间类型 | 接口 | 参数 | 返回类型 |
Datetime | getDateTime | columnIndex:int | time.Time |
Datetime | getDateTime | columnName:string | time.Time |
Time | getTime | columnIndex:int | time.Duration |
Time | getTime | columnName:string | time.Duration |
Date | getDate | columnIndex:int | time.Time |
Date | getDate | columnName:string | time.Time |
参数
参数 | 说明 |
query | SQL语句,请根据所需功能进行设置。 |
示例
使用select from_unixtime(time_col) as datetime_value,time(from_unixtime(time_col)) as time_value, date(from_unixtime(time_col)) as date_value from test_table limit 1
语句查询test_table表中time_col列数据并将其转换为Datetime、Time、Date三种类型,最多返回1行数据。系统会返回查询语句的请求类型、返回值Schema、返回结果等信息。
func queryData(client *tablestore.TableStoreClient) {
// 创建SQL请求。
request := &tablestore.SQLQueryRequest{Query: "select from_unixtime(time_col) as datetime_value,time(from_unixtime(time_col)) as time_value, date(from_unixtime(time_col)) as date_value from test_table limit 1"}
// 获取SQL的响应结果。
response, err := client.SQLQuery(request)
if err != nil {
panic(err)
}
// 获取SQL的返回结果。
resultSet := response.ResultSet
fmt.Println("response resultset:")
for resultSet.HasNext() {
row := resultSet.Next()
for i := 0; i < len(columns); i++ {
name := columns[i].Name
isnull, err := row.IsNull(i)
if err != nil {
println("[INFO:] get column error, name: ", name, ", error: ", err.Error())
continue
}
if isnull {
println("[INFO]: column is SQL NULL, name: ", name)
continue
}
switch columns[i].Type {
case tablestore.ColumnType_DATETIME:
time, err := row.GetDateTime(i)
if err != nil {
println("[INFO:] get column error, name: ", name, ", error: ", err.Error())
}
println(time.Local().String())
time, err = row.GetDateTimeByName("datetime_value")
if err != nil {
println("[INFO:] get column error, name: ", name, ", error: ", err.Error())
}
println(time.String())
case tablestore.ColumnType_TIME:
duration, err := row.GetTime(i)
if err != nil {
println("[INFO:] get column error, name: ", name, ", error: ", err.Error())
}
println(duration.String())
duration, err = row.GetTimeByName("time_value")
if err != nil {
println("[INFO:] get column error, name: ", name, ", error: ", err.Error())
}
println(duration.String())
case tablestore.ColumnType_DATE:
date, err := row.GetDate(i)
if err != nil {
println("[INFO:] get column error, name: ", name, ", error: ", err.Error())
}
println(date.String())
date, err = row.GetDateByName("date_value")
if err != nil {
println("[INFO:] get column error, name: ", name, ", error: ", err.Error())
}
println(date.String())
}
}
}
}
返回结果如下所示。
response resultset:
2023-11-09 10:14:00.01 +0800 CST
2023-11-09 10:14:00.01 +0800 CST
10h14m0.01s
10h14m0.01s
2023-11-09 00:00:00 +0000 UTC
2023-11-09 00:00:00 +0000 UTC