FROM_UTC_TIMESTAMP - MaxCompute

將一個UTC時區的時間戳記轉換成一個指定時區的時間戳記，即將一個UTC時區的時間戳記按照指定的時區顯示。此函數為MaxCompute 2.0擴充函數。

注意事項

FROM_UTC_TIMESTAMP函數還會受到Project層級flag（odps.sql.timezone）配置的影響。假如odps.sql.timezone=Asia/Shanghai即東八區時區，會比UTC時區多八個小時，所以會在FROM_UTC_TIMESTAMP函數轉換後的基礎上再加八個小時顯示。樣本： FROM_UTC_TIMESTAMP(0, 'Asia/Shanghai')的邏輯是把UTC-0時區的0，向北京時區位移，得到的是UTC-0時間為0 + 8 * 3600 = 28800。但由於Project配置了odps.sql.timezone=Asia/Shanghai，會導致繼續位移八小時，最終顯示為1970-01-01 16:00:00。

命令格式

timestamp from_utc_timestamp({any primitive type}*, string <timezone>)

參數說明

{any primitive type}*：必填。時間戳記，支援TIMESTAMP、DATETIME、TINYINT、SMALLINT、INT或BIGINT資料類型。如果該參數為TINYINT、SMALLINT、INT或BIGINT資料類型，則單位為毫秒。
timezone：必填。指定需要轉換的目標時區。
說明
您可直接在搜尋引擎中尋找相關時區列表詳情，當前支援的時區列表也可參見時區列表。

傳回值說明

返回TIMESTAMP類型，格式為yyyy-mm-dd hh:mi:ss.ff3。返回規則如下：

{any primitive type}*非TIMESTAMP、DATETIME、TINYINT、SMALLINT、INT或BIGINT時，返回報錯。
{any primitive type}*值為NULL時，返回報錯。
timezone值為NULL時，返回NULL。

樣本資料

為便於理解各函數的使用方法，本文為您提供來源資料，基於來源資料提供函數相關樣本。建立表mf_date_fun_t，並添加資料，命令樣本如下。

create table if not exists mf_date_fun_t(
    id      int,
    date1   date,
    datetime1   datetime,
    timestamp1 timestamp,
    date2   date,
    datetime2   datetime,
    timestamp2 timestamp,
    date3 string,
    date4 bigint);
insert into mf_date_fun_t values
(1,DATE'2021-11-29',DATETIME'2021-11-29 00:01:00',TIMESTAMP'2021-01-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-20',123456780),
(2,DATE'2021-11-28',DATETIME'2021-11-28 00:02:00',TIMESTAMP'2021-02-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-21',123456781),
(3,DATE'2021-11-27',DATETIME'2021-11-27 00:03:00',TIMESTAMP'2021-03-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-22',123456782),
(4,DATE'2021-11-26',DATETIME'2021-11-26 00:04:00',TIMESTAMP'2021-04-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-23',123456783),
(5,DATE'2021-11-25',DATETIME'2021-11-25 00:05:00',TIMESTAMP'2021-05-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-24',123456784),
(6,DATE'2021-11-24',DATETIME'2021-11-24 00:06:00',TIMESTAMP'2021-06-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-25',123456785),
(7,DATE'2021-11-23',DATETIME'2021-11-23 00:07:00',TIMESTAMP'2021-07-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-26',123456786),
(8,DATE'2021-11-22',DATETIME'2021-11-22 00:08:00',TIMESTAMP'2021-08-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-27',123456787),
(9,DATE'2021-11-21',DATETIME'2021-11-21 00:09:00',TIMESTAMP'2021-09-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-28',123456788),
(10,DATE'2021-11-20',DATETIME'2021-11-20 00:10:00',TIMESTAMP'2021-10-11 00:00:00.123456789',DATE'2021-10-29',DATETIME'2021-10-29 00:00:00',TIMESTAMP'2021-10-11 00:00:00.123456789','2021-11-29',123456789);

查詢表mf_date_fun_t中的資料，命令樣本如下：

select * from mf_date_fun_t;
--返回結果。
+------+-------+------------+------------+-------+------------+------------+-------+------------+
| id   | date1 | datetime1  | timestamp1 | date2 | datetime2  | timestamp2 | date3 | date4      |
+------+-------+------------+------------+-------+------------+------------+-------+------------+
| 1    | 2021-11-29 | 2021-11-29 00:01:00 | 2021-01-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-20 | 123456780  |
| 2    | 2021-11-28 | 2021-11-28 00:02:00 | 2021-02-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-21 | 123456781  |
| 3    | 2021-11-27 | 2021-11-27 00:03:00 | 2021-03-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-22 | 123456782  |
| 4    | 2021-11-26 | 2021-11-26 00:04:00 | 2021-04-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-23 | 123456783  |
| 5    | 2021-11-25 | 2021-11-25 00:05:00 | 2021-05-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-24 | 123456784  |
| 6    | 2021-11-24 | 2021-11-24 00:06:00 | 2021-06-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-25 | 123456785  |
| 7    | 2021-11-23 | 2021-11-23 00:07:00 | 2021-07-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-26 | 123456786  |
| 8    | 2021-11-22 | 2021-11-22 00:08:00 | 2021-08-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-27 | 123456787  |
| 9    | 2021-11-21 | 2021-11-21 00:09:00 | 2021-09-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-28 | 123456788  |
| 10   | 2021-11-20 | 2021-11-20 00:10:00 | 2021-10-11 00:00:00.123456789 | 2021-10-29 | 2021-10-29 00:00:00 | 2021-10-11 00:00:00.123456789 | 2021-11-29 | 123456789  |
+------+-------+------------+------------+-------+------------+------------+-------+------------+

使用樣本：待用資料樣本

--輸入參數為毫秒（ms），返回2017-08-01 04:24:00.0。
select from_utc_timestamp(1501557840000, 'PST'); 
--返回1970-01-30 08:00:00.0。
select from_utc_timestamp('1970-01-30 16:00:00','PST'); 
--返回1970-01-29 16:00:00.0。
select from_utc_timestamp('1970-01-30','PST'); 
--開啟2.0新類型。此命令需要與SQL語句一起提交。返回2011-12-25 17:00:00.123。
set odps.sql.type.system.odps2=true;
select from_utc_timestamp(timestamp '2011-12-25 09:00:00.123456', 'Asia/Shanghai');
--開啟2.0新類型。此命令需要與SQL語句一起提交。返回2011-12-25 01:55:00.0。
set odps.sql.type.system.odps2=true;
select from_utc_timestamp(timestamp '2011-12-25 06:55:00', 'America/Toronto');
--返回NULL。
select from_utc_timestamp('1970-01-30',null);

使用樣本：表資料樣本

基於樣本資料，將datetime1和timestamp1列轉換為指定時區的時間戳記，命令樣本如下。

--開啟2.0新類型。此命令需要與SQL語句一起提交。
set odps.sql.type.system.odps2=true;
select datetime1, from_utc_timestamp(datetime1,'PST') pst, timestamp1, from_utc_timestamp(timestamp1,'Asia/Shanghai') asia from mf_date_fun_t;

返回結果如下。

+---------------------+---------------------+-------------------------------+-------------------------------+
| datetime1           | pst                 | timestamp1                    | asia                          |
+---------------------+---------------------+-------------------------------+-------------------------------+
| 2021-11-29 00:01:00 | 2021-11-28 16:01:00 | 2021-01-11 00:00:00.123456789 | 2021-01-11 08:00:00.123456789 |
| 2021-11-28 00:02:00 | 2021-11-27 16:02:00 | 2021-02-11 00:00:00.123456789 | 2021-02-11 08:00:00.123456789 |
| 2021-11-27 00:03:00 | 2021-11-26 16:03:00 | 2021-03-11 00:00:00.123456789 | 2021-03-11 08:00:00.123456789 |
| 2021-11-26 00:04:00 | 2021-11-25 16:04:00 | 2021-04-11 00:00:00.123456789 | 2021-04-11 08:00:00.123456789 |
| 2021-11-25 00:05:00 | 2021-11-24 16:05:00 | 2021-05-11 00:00:00.123456789 | 2021-05-11 08:00:00.123456789 |
| 2021-11-24 00:06:00 | 2021-11-23 16:06:00 | 2021-06-11 00:00:00.123456789 | 2021-06-11 08:00:00.123456789 |
| 2021-11-23 00:07:00 | 2021-11-22 16:07:00 | 2021-07-11 00:00:00.123456789 | 2021-07-11 08:00:00.123456789 |
| 2021-11-22 00:08:00 | 2021-11-21 16:08:00 | 2021-08-11 00:00:00.123456789 | 2021-08-11 08:00:00.123456789 |
| 2021-11-21 00:09:00 | 2021-11-20 16:09:00 | 2021-09-11 00:00:00.123456789 | 2021-09-11 08:00:00.123456789 |
| 2021-11-20 00:10:00 | 2021-11-19 16:10:00 | 2021-10-11 00:00:00.123456789 | 2021-10-11 08:00:00.123456789 |
+---------------------+---------------------+-------------------------------+-------------------------------+

MaxCompute：FROM_UTC_TIMESTAMP