A. Currently, external functions must be scalar functions. A scalar external function re-turns a single value for each input row.

B. Currently, external functions cannot be shared with data consumers via Secure Data Sharing.

C. An external function accessed through an AWS API Gateway private endpoint can be accessed only from a Snowflake VPC (Virtual Private Cloud) on AWS and in the same AWS region.

D. External functions have more overhead than internal functions (both built-in functions and internal UDFs) and usually execute more slowly