Gian Merlino 1ef25a438f Broker: Add ability to inline subqueries. (#9533) ... * Broker: Add ability to inline subqueries. The main changes: - ClientQuerySegmentWalker: Add ability to inline queries. - Query: Add "getSubQueryId" and "withSubQueryId" methods. - QueryMetrics: Add "subQueryId" dimension. - ServerConfig: Add new "maxSubqueryRows" parameter, which is used by ClientQuerySegmentWalker to limit how many rows can be inlined per query. - IndexedTableJoinMatcher: Allow creating keys on top of unknown types, by assuming they are strings. This is useful because not all types are known for fields in query results. - InlineDataSource: Store RowSignature rather than component parts. Add more zealous "equals" and "hashCode" methods to ease testing. - Moved QuerySegmentWalker test code from CalciteTests and SpecificSegmentsQueryWalker in druid-sql to QueryStackTests in druid-server. Use this to spin up a new ClientQuerySegmentWalkerTest. * Adjustments from CI. * Fix integration test.		2020-03-18 15:06:45 -07:00
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src	Broker: Add ability to inline subqueries. (#9533)	2020-03-18 15:06:45 -07:00
pom.xml	query laning and load shedding (#9407)	2020-03-10 02:57:16 -07:00