Writing custom PrestoDB functions

Dante Pawlow
Sep 11, 2018 · 4 min read

Function types

Implementation

Declare your UDFs in UdfPlugin.java
Presto's implementation of a scalar function
Definition of your aggregation function's state

Testing

Pitfalls

Conclusion


jampp-engineering

Creating technology that helps mobile companies grow

Dante Pawlow

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jampp-engineering

Creating technology that helps mobile companies grow