Ruben Quesada Lopez created CALCITE-2937:
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Summary: Linq4j: implement LazyEnumerable
Key: CALCITE-2937
URL: https://issues.apache.org/jira/browse/CALCITE-2937
Project: Calcite
Issue Type: New Feature
Reporter: Ruben Quesada Lopez
Implement a LazyEnumerable: an Enumerable whose computation (via a Supplier)
will be
postponed until it is actually required. An example of use case could be
CALCITE-2909, where a semiJoin implementation can be optimized by delaying the
computation of the innerLookup until the moment when we are sure that it will
be really needed, i.e. when the first outer enumerator item is processed.
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