CODEWITHSUNDEEP
eventstoredb
NicoC
NicoC

Reputation: 501

Best performance projection strategy from two categories in Greg's Event Store

I'm using Greg's Event Store and I have two categories of streams, I would like to project some events (by type) from both categories into one projection.

My first solution would be to use "fromAll" and select the event types that I'm looking for to create the projection:

Category1-Stream1, 
Category1-Stream2, 
Category2-Stream1, 
Category2-Stream2
    to
FinalProjection

My second solution would be to create two category projections, and then project those two into my final one: 

Category1-Stream1, 
Category1-Stream2, 
Category2-Stream1, 
Category2-Stream2
    to
SubCategory-Category1proj, 
SubCategory-Category2proj,
    to
FinalProjection

What would be the most efficient one? Is there any good practice about this need?

Upvotes: 2

Views: 288

Answers (1)

NicoC
NicoC

Reputation: 501

The best solution is to use fromStreams('$ce-category1', '$ce-category2'), thanks Greg Young for giving me the solution via Google Groups.

Upvotes: 2

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