问题
I have a table as such:
and a file as such: https://storage.googleapis.com/test_share_file/testTimestamp.csv
which looks like:
and I load the file to big query using python as such:
from google.cloud import bigquery as bq
gs_path = 'gs://test_share_file/testTimestamp.csv'
bq_client = bq.Client.from_service_account_json(gcp_creds_fp)
ds = bq_client.dataset('test1')
tbl = ds.table('testTimestamp')
job_config = bq.LoadJobConfig()
job_config.write_disposition = bq.job.WriteDisposition.WRITE_APPEND
job_config.skip_leading_rows = 1 # skip header
load_job = bq_client.load_table_from_uri(gs_path, tbl, job_config=job_config)
res = load_job.result()
and yet in the table, both timestamps are in UTC time!
How do I get the second column to be in eastern time?
回答1:
You can "transform" first column into eastern time on-fly - something like in below example
#standardSQL
WITH t AS (
SELECT TIMESTAMP '2018-05-07 22:40:00+00:00' AS ts
)
SELECT ts, STRING(ts, '-04:00') timestamp_eastern
FROM t
I am dealing with ... stubbornness ...
You can create view which will consists of all the logic you need in place so client will query that view instead of original table
#standardSQL
CREATE VIEW `project.dataset.your_view` AS
SELECT ts, STRING(ts, '-04:00') timestamp_eastern
FROM `project.dataset.your_table`
I do think it odd that big query can't display a time in a timezone
A timestamp represents an absolute point in time, independent of any time zone or convention such as Daylight Savings Time.
Time zones are used when parsing timestamps or formatting timestamps for display. The timestamp value itself does not store a specific time zone. A string-formatted timestamp may include a time zone. When a time zone is not explicitly specified, the default time zone, UTC, is used.
See more about Timestamp type
来源：https://stackoverflow.com/questions/50658061/bigquery-automatically-converts-timestamp-timezone-to-utc