[jira] [Created] (SOLR-8763) Add EvalStream to support "computing on the code" use cases

["Joel Bernstein (JIRA)" <ji...@apache.org>]

Joel Bernstein created SOLR-8763:
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             Summary: Add EvalStream to support "computing on the code" use cases
                 Key: SOLR-8763
                 URL: https://issues.apache.org/jira/browse/SOLR-8763
             Project: Solr
          Issue Type: Bug
            Reporter: Joel Bernstein


Streaming Expression presents interesting opportunities for "computing on the code". The EvalStream will call toExpression() on an underlying stream and then compile and run resulting expression. This will allow developers to write Streaming Expressions that dynamically builds other Streaming Expressions. 

This type of behavior could probably be already done in the open() method, but having an EvalStream adds specific support for dynamic Streaming Expression generation and should encourage these types of applications.



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