chore(optimizer): add tests for Snowflake DATEDIFF function #6090
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Documentation: https://docs.snowflake.com/en/sql-reference/functions/datediff
Platform Support:
Platform | Supported | Argument Type | Return Type
Snowflake | Yes | date_or_time_part,timestamp_expr1,timestamp_expr2(unit, start, end as date/timestamp) | Integer
BigQuery | Yes | For DATE:DATE_DIFF(date1, date2, INT64), for DATETIME:DATETIME_DIFF(datetime1, datetime2, part) | Integer
Redshift | Yes | DATEDIFF(datepart, startdate, enddate)(unit, start, end as date/timestamp) | BIGINT
PostgreSQL | No * | Not directly; use subtraction:date2 - date1orAGE(date1, date2) | Interval
Databricks | Yes | datediff(endDate, startDate)(supports date, timestamp arguments) | Integer
DuckDB | Yes | date_diff(unit, date1, date2)or direct subtraction for days | Integer/Interval
TSQL (SQL Server) | Yes | DATEDIFF(datepart, startdate, enddate)(unit, start, end as date/datetime/timestamp) | Integer