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2.5 KiB
2.5 KiB
slug |
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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 an aggregate function.case_insensitive
, (UInt8) - Whether the function name can be used case-insensitively.alias_to
, (String) - The original function name, if the function name is an alias.create_query
, (String) - Unused.origin
, (Enum8) - Unused.description
, (String) - A high-level description what the function does.syntax
, (String) - Signature of the function.arguments
, (String) - What arguments does the function take.returned_value
, (String) - What does the function return.examples
, (String) - Example usage of the function.categories
, (String) - The category of the function.
Example
SELECT name, is_aggregate, is_deterministic, case_insensitive, alias_to FROM system.functions LIMIT 5;
┌─name─────────────────────┬─is_aggregate─┬─is_deterministic─┬─case_insensitive─┬─alias_to─┐
│ BLAKE3 │ 0 │ 1 │ 0 │ │
│ sipHash128Reference │ 0 │ 1 │ 0 │ │
│ mapExtractKeyLike │ 0 │ 1 │ 0 │ │
│ sipHash128ReferenceKeyed │ 0 │ 1 │ 0 │ │
│ mapPartialSort │ 0 │ 1 │ 0 │ │
└──────────────────────────┴──────────────┴──────────────────┴──────────────────┴──────────┘
5 rows in set. Elapsed: 0.002 sec.