mirror of https://github.com/apache/druid.git
cccf13ea82
* Reverse, pull up lookups in the SQL planner. Adds two new rules: 1) ReverseLookupRule, which eliminates calls to LOOKUP by doing reverse lookups. 2) AggregatePullUpLookupRule, which pulls up calls to LOOKUP above GROUP BY, when the lookup is injective. Adds configs `sqlReverseLookup` and `sqlPullUpLookup` to control whether these rules fire. Both are enabled by default. To minimize the chance of performance problems due to many keys mapping to the same value, ReverseLookupRule refrains from reversing a lookup if there are more keys than `inSubQueryThreshold`. The rationale for using this setting is that reversal works by generating an IN, and the `inSubQueryThreshold` describes the largest IN the user wants the planner to create. * Add additional line. * Style. * Remove commented-out lines. * Fix tests. * Add test. * Fix doc link. * Fix docs. * Add one more test. * Fix tests. * Logic, test updates. * - Make FilterDecomposeConcatRule more flexible. - Make CalciteRulesManager apply reduction rules til fixpoint. * Additional tests, simplify code. |
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