You are tasked with creating a new version (2.0) of a Snowflake Native Application. This new version introduces significant schema changes and requires data migration from the old schema in version 1.0 to the new schem a. You need to write the 'setup.sqr script for version 2.0. Which of the following steps or considerations are MOST critical to ensure a smooth and successful upgrade for existing customers? (Select TWO)
Correct Answer: C,D
Options C and D are critical for a smooth and successful upgrade. Option C: Backing up the data before making any changes is a crucial safeguard against data loss during the upgrade process. The 'CREATE TABLE AS SELECT command provides an easy way to create a backup of the data before schema modifications. Option D: Implementing robust error handling and logging is essential to monitor the upgrade process and identify any potential issues during schema migration or data transfer. This allows for quick intervention and troubleshooting, minimizing downtime and ensuring data integrity. Option A is incorrect because relying on manual data migration is impractical and error-prone for users. Option B might work for simple data migrations, but it lacks error handling and rollback capabilities. Option E is good practice from security perspective.