Tanner Clary created CALCITE-5464:
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Summary: 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
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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