mirror of https://github.com/apache/druid.git
875e0696e0
* GroupBy: Cap dictionary-building selector memory usage. New context parameter "maxSelectorDictionarySize" controls when the per-segment processing code should return early and trigger a trip to the merge buffer. Includes: - Vectorized and nonvectorized implementations. - Adjustments to GroupByQueryRunnerTest to exercise this code in the v2SmallDictionary suite. (Both the selector dictionary and the merging dictionary will be small in that suite.) - Tests for the new config parameter. * Fix issues from tests. * Add "pre-existing" to dictionary. * Simplify GroupByColumnSelectorStrategy interface by removing one of the writeToKeyBuffer methods. * Adjustments from review comments. |
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