[Impala-ASF-CR] IMPALA-4080 [part 2]: Invoke codegen from scan's plan node instead of exec node

["Bikramjeet Vig (Code Review)" <ge...@cloudera.org>]

Hello Daniel Becker, Tim Armstrong, Csaba Ringhofer, Impala Public Jenkins, 

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

    http://gerrit.cloudera.org:8080/15259

to look at the new patch set (#2).

Change subject: IMPALA-4080 [part 2]: Invoke codegen from scan's plan node instead of exec node
......................................................................

IMPALA-4080 [part 2]: Invoke codegen from scan's plan node instead of
exec node

This patch moves the code responsible for invoking codegen for
hdfs scanner to the plan node.

Testing:
Successfully ran exhaustive tests.
Also verified manually that codegen code is generated and
used for each hdfs scanner.

Change-Id: I02c6183271b3731aa0d3cae2426be7269e462967
---
M be/src/exec/hdfs-avro-scanner-ir.cc
M be/src/exec/hdfs-avro-scanner.cc
M be/src/exec/hdfs-avro-scanner.h
M be/src/exec/hdfs-orc-scanner.cc
M be/src/exec/hdfs-rcfile-scanner.cc
M be/src/exec/hdfs-rcfile-scanner.h
M be/src/exec/hdfs-scan-node-base.cc
M be/src/exec/hdfs-scan-node-base.h
M be/src/exec/hdfs-scanner.cc
M be/src/exec/hdfs-scanner.h
M be/src/exec/hdfs-sequence-scanner.cc
M be/src/exec/hdfs-sequence-scanner.h
M be/src/exec/hdfs-text-scanner.cc
M be/src/exec/hdfs-text-scanner.h
M be/src/exec/parquet/hdfs-parquet-scanner.cc
M be/src/exec/parquet/hdfs-parquet-scanner.h
16 files changed, 294 insertions(+), 263 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/59/15259/2
-- 
To view, visit http://gerrit.cloudera.org:8080/15259
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I02c6183271b3731aa0d3cae2426be7269e462967
Gerrit-Change-Number: 15259
Gerrit-PatchSet: 2
Gerrit-Owner: Bikramjeet Vig <bi...@cloudera.com>
Gerrit-Reviewer: Csaba Ringhofer <cs...@cloudera.com>
Gerrit-Reviewer: Daniel Becker <da...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <im...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <ta...@cloudera.com>