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ClickHouse/docs/en/operations/system-tables/functions.md

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/en/operations/system-tables/functions

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.