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By dotCore
via blog.heapanalytics.com
Submitted: Mar 27 2014 / 14:18

At Heap, we lean on PostgreSQL for most of the backend heavy lifting.[1] We store each event as an hstore blob, and we keep a PostgreSQL array of events done by each user we track, sorted by time. Hstore lets us attach properties to events in a flexible way, and arrays of events give us great performance, especially for funnel queries, in which we compute the drop off between different steps in a conversion funnel.[2]
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