Google bigquery 从时间戳提取Bigquery失败

运行以下查询时：

SELECT EXTRACT(HOUR FROM TIMESTAMP '2018-07-09T02:40:23.652Z' AT TIME ZONE 'US/Eastern')

它返回预期结果：22

但是，在运行时：

SELECT start_ts, EXTRACT(HOUR FROM TIMESTAMP TIMESTAMP_MICROS(CAST(1000000 * start_ts AS INT64)) AT TIME ZONE 'US/Eastern') as calc 
    from SOME_CALCS

抛出一个错误：

语法错误：应为或关键字，但获取了标识符 [1:46]处的时间戳

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我所做的就是用时间戳替换字符串。

您应该使用以下格式：1563026408.17193 for BigQuery标准SQL

SELECT start_ts, 
  EXTRACT(HOUR FROM DATETIME(TIMESTAMP_MICROS(CAST(1000000 * start_ts AS INT64)), 'US/Eastern')) as calc
FROM SOME_CALCS

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代码中不需要关键字时间戳

select
    extract(
        hour from
        timestamp_micros(
            cast(1563456789.012345 * 1000000 as int64)
        ) at time zone 'US/Eastern')

timestamp_micros已为您返回timestamp对象：

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根本不起作用