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-- Unfiltered list of all functions;
SHOW FUNCTIONS;
-- List a system function `trim` by searching both user defined and system
-- defined functions.
SHOW FUNCTIONS trim;
SHOW ALL FUNCTIONS trim;
-- List a system function `concat` by searching system defined functions.
SHOW SYSTEM FUNCTIONS concat;
-- List a user function `concat_user` by searching user defined functions.
SHOW USER FUNCTIONS concat_user;
-- List a qualified function `max` from database `salesdb`.
SHOW SYSTEM FUNCTIONS salesdb.max;
-- List all functions starting with `t`
SHOW FUNCTIONS LIKE 't*';
-- List all functions starting with `t` without LIKE keyword
SHOW FUNCTIONS 't*';
-- List all user functions starting with `t`
SHOW USER FUNCTIONS LIKE 't*';
-- List all user functions starting with `t` without LIKE keyword
SHOW USER FUNCTIONS 't*';
-- List all functions starting with `yea` or `windo`
SHOW FUNCTIONS LIKE 'yea*|windo*';
-- Use normal regex pattern to list function names that has 4 characters
-- with `t` as the starting character.
SHOW FUNCTIONS LIKE 't[a-z][a-z][a-z]';
-- List all functions from default schema
SHOW FUNCTIONS FROM default;
-- List all user functions from default schema
SHOW USER FUNCTIONS FROM default;
-- List all functions from default schema starting with `t`
SHOW FUNCTIONS FROM default LIKE 't*';
-- List all functions from default schema starting with `t` without LIKE keyword
SHOW FUNCTIONS FROM default 't*';
-- List all user functions from default schema starting with `t`
SHOW USER FUNCTIONS FROM default LIKE 't*';
-- List all user functions from default schema starting with `t` without LIKE keyword
SHOW USER FUNCTIONS FROM default 't*';
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