Impala Public Jenkins has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/12172 )

Change subject: IMPALA-7979: Enhance decoders to support value-skipping
......................................................................

IMPALA-7979: Enhance decoders to support value-skipping

This commit adds value-skipping functionality to the decoders.
Value-skipping is useful when we know that we won't need the
following N values, so instead of decoding and dropping them, we
can just "jump" through them.

This feature is a prerequisite for Parquet page skipping (IMPALA-5843).

I added backend tests for all the decoders. Backed tests related to
bitpacking are moved to the newly created bit-stream-utils-test.

Change-Id: Ib848f1bd71735fe84e8064daf700417b32589f57
Reviewed-on: http://gerrit.cloudera.org:8080/12172
Reviewed-by: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
---
M be/src/exec/parquet/CMakeLists.txt
A be/src/exec/parquet/parquet-bool-decoder-test.cc
M be/src/exec/parquet/parquet-bool-decoder.cc
M be/src/exec/parquet/parquet-bool-decoder.h
M be/src/util/CMakeLists.txt
A be/src/util/bit-stream-utils-test.cc
M be/src/util/bit-stream-utils.h
M be/src/util/bit-stream-utils.inline.h
M be/src/util/dict-encoding.h
M be/src/util/dict-test.cc
M be/src/util/rle-encoding.h
M be/src/util/rle-test.cc
12 files changed, 765 insertions(+), 130 deletions(-)

Approvals:
  Impala Public Jenkins: Looks good to me, approved; Verified

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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: Ib848f1bd71735fe84e8064daf700417b32589f57
Gerrit-Change-Number: 12172
Gerrit-PatchSet: 7
Gerrit-Owner: Zoltan Borok-Nagy <borokna...@cloudera.com>
Gerrit-Reviewer: Csaba Ringhofer <csringho...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-Reviewer: Zoltan Borok-Nagy <borokna...@cloudera.com>

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