WITH ARGUMENTS Syntax

The WITH ARGUMENTS syntax enhances the capabilities of existing UDFs, primarily enabling users to configure the initial state upon UDF execution. Utilizing this feature, users can:

• Configure runtime resources and concurrency: Specify the necessary resources (for example, memory, CPU) for UDF operation along with the count of concurrent execution instances to enhance performance and resource efficiency.
• Set class initialization parameters: For UDFs defined within a class structure, employ the WITH ARGUMENTS syntax to pass initialization constructor arguments, thereby establishing a particular initial state during UDF instantiation.

Key usage considerations include:

• WITH ARGUMENTS accommodates several predefined parameters. Refer to Table 1 for specifics. Ensure class initialization parameter names do not conflict with these fixed parameters, noting that parameter names are case-sensitive.
• Only constants can be used as input parameters.
• UDF function body defined in the class format. Users can define the __init__ and __del__ member methods of the class as needed, but they must define the process member method, which serves as the main function entry.
• min_concurrency and max_concurrency must be set simultaneously. Successful configuration indicates that adaptive concurrency is enabled.