---
metadata:
  - name: generator
    content: Diplodoc Platform v5.50.6
alternate:
  - https://ydb.tech/docs/en/yql/reference/udf/list.md?version=main
  - https://ydb.tech/docs/ru/yql/reference/udf/list.md?version=main
sourcePath: en/core/yql/reference/udf/list/index.md
---
> **Documentation Index:** Fetch the complete configuration index at https://ydb.tech/docs/en/llms.txt

# Functions of built-in C++ libraries

Many application functions that on the one hand are too specific to become part of the YQL core, and on the other hand might be useful to a wide range of users, are available through built-in C++ libraries.



* [DateTime](https://ydb.tech/docs/en/yql/reference/udf/list/datetime.md?version=main)
* [Digest](https://ydb.tech/docs/en/yql/reference/udf/list/digest.md?version=main)
* [Histogram](https://ydb.tech/docs/en/yql/reference/udf/list/histogram.md?version=main)
* [Hyperscan](https://ydb.tech/docs/en/yql/reference/udf/list/hyperscan.md?version=main)
* [Ip](https://ydb.tech/docs/en/yql/reference/udf/list/ip.md?version=main)
* [Knn](https://ydb.tech/docs/en/yql/reference/udf/list/knn.md?version=main)
* [Math](https://ydb.tech/docs/en/yql/reference/udf/list/math.md?version=main)
* [Pcre](https://ydb.tech/docs/en/yql/reference/udf/list/pcre.md?version=main)
* [Pire](https://ydb.tech/docs/en/yql/reference/udf/list/pire.md?version=main)
* [Re2](https://ydb.tech/docs/en/yql/reference/udf/list/re2.md?version=main)
* [Roaring](https://ydb.tech/docs/en/yql/reference/udf/list/roaring.md?version=main)
* [String](https://ydb.tech/docs/en/yql/reference/udf/list/string.md?version=main)
* [Unicode](https://ydb.tech/docs/en/yql/reference/udf/list/unicode.md?version=main)
* [Url](https://ydb.tech/docs/en/yql/reference/udf/list/url.md?version=main)
* [Yson](https://ydb.tech/docs/en/yql/reference/udf/list/yson.md?version=main)