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Reapply "fix(aggregation, disk-based) MCOL-5691 distinct aggregate disk based (#3145)"

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This reverts commit a5c12b98d7.
This commit is contained in:
Aleksei Antipovskii
2024-12-06 11:32:36 +01:00
committed by drrtuy
parent 5e5d328269
commit e0a01c6cf4
7 changed files with 417 additions and 144 deletions
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11
utils/rowgroup/rowaggregation.h
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@ -681,6 +681,17 @@ class RowAggregationUM : public RowAggregation
*/
bool nextRowGroup();
/** @brief Returns aggregated rows in a RowGroup as long as there are still not returned result RowGroups.
*
* This function should be called repeatedly until false is returned (meaning end of data).
* Returns data from in-memory storage, as well as spilled data from disk. If disk-based aggregation is
* happening, finalAggregation() should be called before returning result RowGroups to finalize the used
* RowAggStorages, merge different spilled generations and obtain correct aggregation results.
*
* @returns True if there are more result RowGroups, else false if all results have been returned.
*/
bool nextOutputRowGroup();
/** @brief Add an aggregator for DISTINCT aggregation
*/
void distinctAggregator(const boost::shared_ptr<RowAggregation>& da)