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From "Jinfeng Ni (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-5459) Extend physical operator test framework to test mini plans consisting of multiple operators
Date Tue, 02 May 2017 06:18:04 GMT
Jinfeng Ni created DRILL-5459:
---------------------------------

             Summary: Extend physical operator test framework to test mini plans consisting
of multiple operators
                 Key: DRILL-5459
                 URL: https://issues.apache.org/jira/browse/DRILL-5459
             Project: Apache Drill
          Issue Type: Improvement
          Components: Tools, Build & Test
            Reporter: Jinfeng Ni


DRILL-4437 introduced a unit test framework to test a non-scan physical operator. A JSON reader
is implicitly used to specify the inputs to the physical operator under test. 

There are needs to extend such unit test framework for two scenarios.

1. We need a way to test scan operator with different record readers. Drill supports a variety
of data source, and it's important to make sure every record reader work properly according
to the protocol defined.

2. We need a way to test a so-called mini-plan (aka plan fragment) consisting of multiple
non-scan operators. 

For the 2nd need, an alternative is to leverage SQL statement and query planner. However,
such approach has a direct dependency on query planner; 1) any planner change may impact the
testcase and lead to a different plan, 2) it's not always easy job to force the planner to
get a desired plan fragment for testing.

In particular, it would be good to have a relatively easy way to specify a mini-plan with
a couple of targeted physical operators. 

This JIRA is created to track the work to extend the unit test framework in DRILL-4437.
    



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