Fix timestamp issue

[hrialan]

fixes #8

[hrialan]

Hello,

I tried to solve your issue @alexvys, does it meet your needs?

@tanukifk, Can you please also take a look since you worked on the timezone topic?

Thanks!

[hrialan]

Error it fixes:

[alexvys]

Thanks a lot!

[alexvys]

TIMESTAMP_DIFF(CURRENT_TIMESTAMP("${timeZone}"), MAX(${dateColumn}), ${timeUnit}) AS delay

I think this could also work

[tanukifk]

Thank you for notifying me.
Because timestamp_diff and date_diff take different granularity, we need to use both two functions based on arguments.

I think this conditional variable can fix the problem. As you know, timestamp does not need timezone.

comparisonFunction = timeUnit in ("DAY", "WEEK", "MONTH", "QUARTER", "YEAR") 
? `DATE_DIFF(CURRENT_DATE("${timeZone}"), MAX(${dateColumn}), ${timeUnit})` 
: `TIMESTAMP_DIFF(CURRENT_TIMESTAMP(), MAX(${dateColumn}), ${timeUnit})`; 

ref
https://cloud.google.com/bigquery/docs/reference/standard-sql/timestamp_functions#timestamp_diff
https://cloud.google.com/bigquery/docs/reference/standard-sql/date_functions#date_diff