# 用户自定义函数UDF
- **[UDF概述](https://support.huaweicloud.com/sdkreference-aidatalake/aidatalake_061_0104.html)**   
- **[开发注意事项](https://support.huaweicloud.com/sdkreference-aidatalake/aidatalake_061_0115.html)**   
- **[数据类型映射](https://support.huaweicloud.com/sdkreference-aidatalake/aidatalake_061_0113.html)**   
- **[环境变量设置](https://support.huaweicloud.com/sdkreference-aidatalake/aidatalake_061_0122.html)**   
- **[Scalar UDF](https://support.huaweicloud.com/sdkreference-aidatalake/aidatalake_061_0106.html)**   
- **[Class UDF](https://support.huaweicloud.com/sdkreference-aidatalake/aidatalake_061_0107.html)**   
- **[Vectorized UDF](https://support.huaweicloud.com/sdkreference-aidatalake/aidatalake_061_0108.html)**   
- **[UDTF](https://support.huaweicloud.com/sdkreference-aidatalake/aidatalake_061_0109.html)**   
- **[UDAF](https://support.huaweicloud.com/sdkreference-aidatalake/aidatalake_061_0110.html)**   
- **[WITH ARGUMENTS语法](https://support.huaweicloud.com/sdkreference-aidatalake/aidatalake_061_0116.html)**   
- **[自适应并行](https://support.huaweicloud.com/sdkreference-aidatalake/aidatalake_061_0117.html)**   
- **[UDF错误处理与重试](https://support.huaweicloud.com/sdkreference-aidatalake/aidatalake_061_0121.html)**   
- **[UDF Actor放置策略](https://support.huaweicloud.com/sdkreference-aidatalake/aidatalake_061_0123.html)**   
- **[Python UDF性能调优](https://support.huaweicloud.com/sdkreference-aidatalake/aidatalake_061_0124.html)**