Custom aggregate support about plgo HOT 3 OPEN

I can take a look at custom aggregates and figure out what to do.

But for now you can do something like this:

select myfunction(array_agg(column)) from table

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Ok thank's a lot I thought it could improve on performances to use aggregations

from plgo.

This may already be possible by writing normal functions in go and exposing them using plgo to postgres. Then use "create aggregate.." and compose in those functions.

"A simple aggregate function is made from one or two ordinary functions: a state transition function sfunc, and an optional final calculation function ffunc"

• https://www.postgresql.org/docs/9.5/sql-createaggregate.html

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