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Marek Vavruša 5f1e65b252 AggregateFunctions: implemented topK(n) 
This implements a new function for approximate
computation of the most frequent entries using
Filtered Space Saving with a merge step adapted
from Parallel Space Saving paper.

It works better for cases where GROUP BY x
is impractical due to high cardinality of x,
such as top IP addresses or top search queries.
2017-05-03 23:09:52 -07:00
..
external_dictionaries Changed tabs to spaces in code [#CLICKHOUSE-3]. 2017-04-01 11:35:09 +03:00
integration_drafts/graphite_merge_tree Changed tabs to spaces in code [#CLICKHOUSE-3]. 2017-04-01 11:35:09 +03:00
perf_drafts Fool's day changed, continued [#CLICKHOUSE-3]. 2017-04-05 14:52:23 +03:00
queries AggregateFunctions: implemented topK(n) 2017-05-03 23:09:52 -07:00
.gitignore Added gitignore [#METR-2944]. 2014-03-24 04:37:39 +04:00
clickhouse-client.xml Changed tabs to spaces in code [#CLICKHOUSE-3]. 2017-04-01 11:35:09 +03:00
clickhouse-test Avoid code duplication near MergeTreeBlockInputStream. [#CLICKHOUSE-2] 2017-04-15 06:48:24 +03:00
CMakeLists.txt Changed tabs to spaces in code [#CLICKHOUSE-3]. 2017-04-01 11:35:09 +03:00