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jarodwen@gmail.com <jarodwen@gmail.com@123451ca-8445-de46-9d55-352943316053> in asterixdb

Fixed a bug on the merging phase of the external grouper; added a float sum aggregator (with test cases).

git-svn-id: https://hyracks.googlecode.com/svn/branches/hyracks_dev_next@1087 123451ca-8445-de46-9d55-352943316053

merged aggregators_dev_next r847:1065 into hyracks_dev_next

git-svn-id: https://hyracks.googlecode.com/svn/branches/hyracks_dev_next@1066 123451ca-8445-de46-9d55-352943316053

merge hyracks_dev_next r978:1064

git-svn-id: https://hyracks.googlecode.com/svn/branches/aggregators_dev_next@1065 123451ca-8445-de46-9d55-352943316053

Update issue #52:

Added integration test for new aggregator interface: contains tests for sum aggregation on both in-mem and external group operators.

git-svn-id: https://hyracks.googlecode.com/svn/branches/aggregators_dev_next@861 123451ca-8445-de46-9d55-352943316053

Update issue #52:

Added new aggregator interfaces and group operator implementations, in order to merge the old interfaces.

A simple integer sum aggregator is added to show the usage of the new interfaces.

git-svn-id: https://hyracks.googlecode.com/svn/branches/aggregators_dev_next@860 123451ca-8445-de46-9d55-352943316053

Create a branch for merging aggregators.

git-svn-id: https://hyracks.googlecode.com/svn/branches/aggregators_dev_next@847 123451ca-8445-de46-9d55-352943316053

Fixed the code format based on the Hyracks code format profile.

git-svn-id: https://hyracks.googlecode.com/svn/branches/hyracks_spilling_groupby@309 123451ca-8445-de46-9d55-352943316053

Added external hash group operator. Main changes include: - added external hash group operator and its helper hash table class, and test cases; - modified aggregator factories to support external group operator; - added some aggregators (min/max, sum); - added a plain file writer to output plain text onto disk.

git-svn-id: https://hyracks.googlecode.com/svn/branches/hyracks_spilling_groupby@301 123451ca-8445-de46-9d55-352943316053