This implements some aggregation helper functions for postgres hstore written in C. This is basically a rewrite in C of the SQL implementations described in http://big-elephants.com/2012-10/aggregations-with-pg-hstore/
Select array_count(Array['foo','bar','foo','baz'])
-- => "bar"=>"1", "baz"=>"1", "foo"=>"2"Select hstore_add('a=>1,b=>2'::hstore ,'a=>1,c=>2'::hstore)
-- => "a"=>"2", "b"=>"2", "c"=>"2"Select array_uniq(Array[1,5,9,4,1,9])
-- => "{1,4,5,9}"bash build.sh
If you are on Mac OS using homebrew you can use the included Formular postgres_agg_funcs.rb Otherwise use and adapt the build_mac.sh script to your needs.
This Software is licensed under the MIT License.
Copyright (c) 2012 adeven GmbH, http://www.adeven.com
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