Description
To create an udf according to the official example,we will get the following error:
org.apache.flink.table.api.ValidationException: Could not register temporary system function. A function named 'HashFunction' does already exist.
To create an udf according to the official example,we will get the following error:
org.apache.flink.table.api.ValidationException: Could not register temporary system function. A function named 'HashFunction' does already exist.