The function in Snowflake that returns the URL of a stage using the stage name as the input isC. GET_PRESIGNED_URL. This function generates a pre-signed URL for a specific file in a stage, enabling secure, temporary access to that file without requiring Snowflake credentials. While the function is primarily used for accessing files in external stages, such as Amazon S3 buckets, it is instrumental in scenarios requiring direct, secure file access for a limited time.

It ' s important to note that as of my last update, Snowflake ' s documentation does not specifically list a function namedGET_PRESIGNED_URLfor directly obtaining a stage ' s URL by its name. The description aligns closely with functionality available in cloud storage services (e.g., AWS S3 ' s presigned URLs) which can be used in conjunction with Snowflake stages for secure, temporary access to files. For direct interaction with stages and their files, Snowflake offers various functions and commands, but the exact match for generating a presigned URL through a simple function call may vary or require leveraging external cloud services APIs in addition to Snowflake ' s capabilities.