chore(optimizer): add tests for Snowflake DATEADD function #6089
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Documentation: https://docs.snowflake.com/en/sql-reference/functions/dateadd
Platform Support:
Platform | Supported | Argument Type | Return Type
Snowflake | Yes | String (date part), Integer (amount), Date/Timestamp (input date) | Date/Timestamp
BigQuery | Yes (as DATE_ADD) | Date, Interval (INTEGER), String (date part granularity) | Date
Redshift | Yes | String (date part), Integer (amount), Date/Timestamp | Date/Timestamp
PostgreSQL | No (use INTERVAL addition or functions like DATE + INTERVAL or AGE) | N/A | N/A
Databricks | Yes | Date/Timestamp, Integer/Interval | Date/Timestamp
DuckDB | No (use INTERVAL addition: DATE + INTERVAL) | N/A | N/A
TSQL | Yes | String (date part), Integer (amount), Date/Timestamp | Date/Timestamp