1c9486c1ac
## What changes were proposed in this pull request? Before ORC 1.5.3, `orc.dictionary.key.threshold` and `hive.exec.orc.dictionary.key.size.threshold` are applied for all columns. This has been a big huddle to enable dictionary encoding. From ORC 1.5.3, `orc.column.encoding.direct` is added to enforce direct encoding selectively in a column-wise manner. This PR aims to add that feature by upgrading ORC from 1.5.2 to 1.5.3. The followings are the patches in ORC 1.5.3 and this feature is the only one related to Spark directly. ``` ORC-406: ORC: Char(n) and Varchar(n) writers truncate to n bytes & corrupts multi-byte data (gopalv) ORC-403: [C++] Add checks to avoid invalid offsets in InputStream ORC-405: Remove calcite as a dependency from the benchmarks. ORC-375: Fix libhdfs on gcc7 by adding #include <functional> two places. ORC-383: Parallel builds fails with ConcurrentModificationException ORC-382: Apache rat exclusions + add rat check to travis ORC-401: Fix incorrect quoting in specification. ORC-385: Change RecordReader to extend Closeable. ORC-384: [C++] fix memory leak when loading non-ORC files ORC-391: [c++] parseType does not accept underscore in the field name ORC-397: Allow selective disabling of dictionary encoding. Original patch was by Mithun Radhakrishnan. ORC-389: Add ability to not decode Acid metadata columns ``` ## How was this patch tested? Pass the Jenkins with newly added test cases. Closes #22622 from dongjoon-hyun/SPARK-25635. Authored-by: Dongjoon Hyun <dongjoon@apache.org> Signed-off-by: gatorsmile <gatorsmile@gmail.com> |
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