Tim Armstrong has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/11949 )

Change subject: IMPALA-7869: break up parquet-column-readers.cc
......................................................................


Patch Set 9:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/11949/9/be/src/exec/parquet/parquet-column-readers.cc
File be/src/exec/parquet/parquet-column-readers.cc:

http://gerrit.cloudera.org:8080/#/c/11949/9/be/src/exec/parquet/parquet-column-readers.cc@784
PS9, Line 784: bool ScalarColumnReader<TimestampValue, parquet::Type::INT64, 
true>::DecodeValues(
I needed to add this specialisation in to call timestamp_decoder.DecodeBatch(). 
This fixes a bug that was revealed by removing encoding_ from 
ParquetLevelDecoder - int64_timestamps_plain.parq could no longer be scanned 
because max_level_ was 0, which meant that encoding_ in ParquetLevelDecoder got 
left as PLAIN, which effectively disabled that code path for the test file. 
After removing encoding_ it revealed the bug and caused a test failure.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I0efd5c50b781fe9e3c022b33c66c06cfb529c0b8
Gerrit-Change-Number: 11949
Gerrit-PatchSet: 9
Gerrit-Owner: Tim Armstrong <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Tim Armstrong <[email protected]>
Gerrit-Reviewer: Zoltan Borok-Nagy <[email protected]>
Gerrit-Comment-Date: Mon, 26 Nov 2018 06:02:14 +0000
Gerrit-HasComments: Yes

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