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Posted to commits@druid.apache.org by "benkrug (via GitHub)" <gi...@apache.org> on 2023/02/07 18:58:14 UTC
[GitHub] [druid] benkrug opened a new pull request, #13763: Update default for finalize in query-context.md
benkrug opened a new pull request, #13763:
URL: https://github.com/apache/druid/pull/13763
I recommend setting the default for 'finalize' to 'N/A'. There are various query stages at which finalization is possible. By default, some intermediate steps do or don't finalize, and end results are finalized. Setting 'finalize' to either 'true' or 'false' changes the default behavior. The changes from setting it to 'true' are generally behind the scenes, but can affect some queries, when there are intermediate stages that are not finalized by default.
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[GitHub] [druid] gianm commented on pull request #13763: Update default for finalize in query-context.md
Posted by "gianm (via GitHub)" <gi...@apache.org>.
gianm commented on PR #13763:
URL: https://github.com/apache/druid/pull/13763#issuecomment-1429172355
"n/a" isn't that helpful of a doc here; we should spell out how it actually works. AFAIK the default is `true` for outer queries and `false` for subqueries (i.e., queries that appear in `query` datasources).
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[GitHub] [druid] paul-rogers merged pull request #13763: Update default for finalize in query-context.md
Posted by "paul-rogers (via GitHub)" <gi...@apache.org>.
paul-rogers merged PR #13763:
URL: https://github.com/apache/druid/pull/13763
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[GitHub] [druid] ektravel commented on a diff in pull request #13763: Update default for finalize in query-context.md
Posted by "ektravel (via GitHub)" <gi...@apache.org>.
ektravel commented on code in PR #13763:
URL: https://github.com/apache/druid/pull/13763#discussion_r1110083671
##########
docs/querying/query-context.md:
##########
@@ -49,7 +49,7 @@ Unless otherwise noted, the following parameters apply to all query types.
|`useResultLevelCache`| `true` | Flag indicating whether to leverage the result level cache for this query. When set to false, it disables reading from the query cache for this query. When set to true, Druid uses `druid.broker.cache.useResultLevelCache` to determine whether or not to read from the result-level query cache |
|`populateResultLevelCache` | `true` | Flag indicating whether to save the results of the query to the result level cache. Primarily used for debugging. When set to false, it disables saving the results of this query to the query cache. When set to true, Druid uses `druid.broker.cache.populateResultLevelCache` to determine whether or not to save the results of this query to the result-level query cache |
|`bySegment` | `false` | Native queries only. Return "by segment" results. Primarily used for debugging, setting it to `true` returns results associated with the data segment they came from |
-|`finalize` | `true` | Flag indicating whether to "finalize" aggregation results. Primarily used for debugging. For instance, the `hyperUnique` aggregator will return the full HyperLogLog sketch instead of the estimated cardinality when this flag is set to `false` |
+|`finalize` | `N/A` | Flag indicating whether to "finalize" aggregation results. Primarily used for debugging. For instance, the `hyperUnique` aggregator will return the full HyperLogLog sketch instead of the estimated cardinality when this flag is set to `false` |
Review Comment:
```suggestion
|`finalize` | `N/A` | Flag indicating whether to "finalize" aggregation results. Primarily used for debugging. For instance, the `hyperUnique` aggregator returns the full HyperLogLog sketch instead of the estimated cardinality when this flag is set to `false` |
```
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