Hello Bharath Vissapragada, Philip Zeyliger, Impala Public Jenkins,

I'd like you to reexamine a change. Please visit

    http://gerrit.cloudera.org:8080/11920

to look at the new patch set (#4).

Change subject: IMPALA-7842: Make query fragments available for unit testing
......................................................................

IMPALA-7842: Make query fragments available for unit testing

The FrontEnd class uses a functional model to generate a plan: pass
in SQL text to the createExecRequest() method and get back a Thrift
plan ready for serialization.

For unit testing, however, we need access to the intermediate plan
fragments produced by the planner. Inspecting only the Thrift version
results in loss of important details.

This fix introduces a new planner context (PlanCtx) class that passes
information into the planner, and can pass the plan fragments back out.
Code that used the prior version (pass in a query context and explain
string) are changed to use the new form.

Testing:
* There is no functional change, just a refactoring of the existing
  code. Ran all FE test to verify no regressions.
* Introduces a new test case that uses this feature to verify plan
  cardinality.

Change-Id: I4c615dbc1d14685a6966c5ca7538777cdc80b74d
---
M fe/src/main/java/org/apache/impala/service/Frontend.java
M fe/src/main/java/org/apache/impala/service/JniFrontend.java
A fe/src/test/java/org/apache/impala/planner/CardinalityTest.java
M fe/src/test/java/org/apache/impala/planner/PlannerTest.java
M fe/src/test/java/org/apache/impala/planner/PlannerTestBase.java
5 files changed, 236 insertions(+), 37 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/20/11920/4
--
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I4c615dbc1d14685a6966c5ca7538777cdc80b74d
Gerrit-Change-Number: 11920
Gerrit-PatchSet: 4
Gerrit-Owner: Paul Rogers <par0...@yahoo.com>
Gerrit-Reviewer: Bharath Vissapragada <bhara...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Reviewer: Paul Rogers <par0...@yahoo.com>
Gerrit-Reviewer: Philip Zeyliger <phi...@cloudera.com>

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