Block loaders for MV_MIN and MV_MAX for keywords #137473
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Adds special purpose `BlockLoader` implementations for the `MV_MIN` and `MV_MAX` functions for `keyword` fields with doc values. These are a noop for single valued keywords but should be *much* faster for multivalued keywords. These aren't plugged in yet. We can plug them in and performance test them in elastic#137382. And they give us two more functions we can use to demonstrate elastic#137382.
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Adds special purpose
BlockLoaderimplementations for theMV_MINandMV_MAXfunctions forkeywordfields with doc values. These are a noop for single valued keywords but should be much faster for multivalued keywords.These aren't plugged in yet. We can plug them in and performance test them in #137382. And they give us two more functions we can use to demonstrate #137382.