Show Functions

SHOW [USER | SYSTEM |ALL ] FUNCTIONS ([LIKE] regex | [db_name.]function_name)

Show functions matching the given regex or function name. If no regex or name is provided, then all functions are shown. IF USER or SYSTEM is declared then these will only show user-defined Spark SQL functions and system-defined Spark SQL functions respectively.

LIKE

This qualifier is allowed only for compatibility and has no effect.