functions
Contains information about normal and aggregate functions.
Columns:
- name(- String) – The name of the function.
- is_aggregate(- UInt8) — Whether the function is aggregate.
Example
 SELECT * FROM system.functions LIMIT 10;
┌─name──────────────────┬─is_aggregate─┬─case_insensitive─┬─alias_to─┬─create_query─┬─origin─┐
│ logTrace              │            0 │                0 │          │              │ System │
│ aes_decrypt_mysql     │            0 │                0 │          │              │ System │
│ aes_encrypt_mysql     │            0 │                0 │          │              │ System │
│ decrypt               │            0 │                0 │          │              │ System │
│ encrypt               │            0 │                0 │          │              │ System │
│ toBool                │            0 │                0 │          │              │ System │
│ windowID              │            0 │                0 │          │              │ System │
│ hopStart              │            0 │                0 │          │              │ System │
│ hop                   │            0 │                0 │          │              │ System │
│ snowflakeToDateTime64 │            0 │                0 │          │              │ System │
└───────────────────────┴──────────────┴──────────────────┴──────────┴──────────────┴────────┘
10 rows in set. Elapsed: 0.002 sec.