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system.user_functions

Introduced or updated: v1.2.957

Contains information about user-defined functions and external functions in the system.

Remote UDF metadata hides server header values as ***. It also masks URL usernames, passwords, query-parameter values, and fragments in the displayed address. This affects the displayed definition, not the stored connection credentials or function execution. The shared metadata formatter applies the same masking to /v1/user_functions output.

See also: SHOW USER FUNCTIONS.

SELECT * FROM system.user_functions;


┌─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
│ name │ is_aggregate │ description │ arguments │ language │ definition │
├────────────────┼───────────────────┼─────────────┼───────────────────────────────────────────────────────────┼──────────┼───────────────────────────────────────────────────────────────────────────────────────────────────────────┤
│ binary_reverse │ NULL │ │ {"arg_types":["Binary NULL"],"return_type":"Binary NULL"} │ python │ (Binary NULL) RETURNS Binary NULL LANGUAGE python HANDLER = binary_reverse ADDRESS = http://0.0.0.0:8815 │
│ echo │ NULL │ │ {"arg_types":["String NULL"],"return_type":"String NULL"} │ python │ (String NULL) RETURNS String NULL LANGUAGE python HANDLER = echo ADDRESS = http://0.0.0.0:8815 │
│ isnotempty │ NULL │ │ {"parameters":["p"]} │ SQL │ (p) -> (NOT is_null(p)) │
└─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘