Hi team!
When I execute the CREATE FUNCTION statement, It can only work on one
database that I specified.
I hope to support a feature when I execute the following statement, it can
work on all databases. The Syntax:
CREATE GLOBAL FUNCTION [IF NOT EXISTS] [db_name.]function_name([arg_type[,
arg_type...])
  RETURNS return_type
  LOCATION 'hdfs_path_to_dot_so'
  SYMBOL='symbol_name'

It'll need a default database named _impala_global. The global function
will be related to _impala_global.

Do you have any ideas?

Best Regards,
Xiaoqing Gao

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