[jira] [Assigned] (CALCITE-5464) Implement BigQuery DATE_ADD/DATE_DIFF

["Tanner Clary (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-5464?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tanner Clary reassigned CALCITE-5464:
-------------------------------------

    Assignee: Tanner Clary

> Implement BigQuery DATE_ADD/DATE_DIFF
> -------------------------------------
>
>                 Key: CALCITE-5464
>                 URL: https://issues.apache.org/jira/browse/CALCITE-5464
>             Project: Calcite
>          Issue Type: Sub-task
>            Reporter: Tanner Clary
>            Assignee: Tanner Clary
>            Priority: Major
>
> Add support for BigQuery DATE_ADD/DATE_DIFF functions. 
> {{DATE_ADD(date_expression, interval)}} adds the interval to the date expression.
> Example: {{DATE_ADD(DATE '2008-12-25', INTERVAL 3 DAY)}} would return '2008-12-28'.
> [BigQuery docs|https://cloud.google.com/bigquery/docs/reference/standard-sql/date_functions#date_add]
> {{DATE_DIFF(date_expression, date_expression2, time_unit)}} returns the whole number of time_unit between the first and second date expressions, with the result being negative if the first date is earlier than the second.
> Example: {{DATE_DIFF(DATE '2008-12-25', DATE '2008-12-28', DAY)}} would return -3.
> [BigQuery docs|https://cloud.google.com/bigquery/docs/reference/standard-sql/date_functions#date_diff]



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