tag | 1447fe4fcefe1649e569800bff27dea779d67fef | |
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tagger | Owen O'Malley <omalley@apache.org> | Thu Jun 27 20:07:17 2019 -0700 |
object | 8a8e471f6a7064e9538374374e57c9e5b4be520d |
ORC Release 1.5.6
commit | 8a8e471f6a7064e9538374374e57c9e5b4be520d | [log] [tgz] |
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author | Owen O'Malley <omalley@apache.org> | Fri Jun 21 15:27:16 2019 -0700 |
committer | Owen O'Malley <omalley@apache.org> | Fri Jun 21 15:55:35 2019 -0700 |
tree | 7639cde66baf382555e745717e7b0240b1bed946 | |
parent | 87821ec27768945489c55dc9ef41fb85e017075c [diff] |
ORC-517: Fix incorrect minimum and maximum statistics for decimal64 columns. Fixes #405 Signed-off-by: Owen O'Malley <omalley@apache.org>
ORC is a self-describing type-aware columnar file format designed for Hadoop workloads. It is optimized for large streaming reads, but with integrated support for finding required rows quickly. Storing data in a columnar format lets the reader read, decompress, and process only the values that are required for the current query. Because ORC files are type-aware, the writer chooses the most appropriate encoding for the type and builds an internal index as the file is written. Predicate pushdown uses those indexes to determine which stripes in a file need to be read for a particular query and the row indexes can narrow the search to a particular set of 10,000 rows. ORC supports the complete set of types in Hive, including the complex types: structs, lists, maps, and unions.
This project includes both a Java library and a C++ library for reading and writing the Optimized Row Columnar (ORC) file format. The C++ and Java libraries are completely independent of each other and will each read all versions of ORC files. But the C++ library only writes the original (Hive 0.11) version of ORC files, and will be extened in the future.
Releases:
The current build status:
Bug tracking: Apache Jira
The subdirectories are:
To build a release version with debug information:
% mkdir build % cd build % cmake .. % make package % make test-out
To build a debug version:
% mkdir build % cd build % cmake .. -DCMAKE_BUILD_TYPE=DEBUG % make package % make test-out
To build a release version without debug information:
% mkdir build % cd build % cmake .. -DCMAKE_BUILD_TYPE=RELEASE % make package % make test-out
To build only the Java library:
% cd java % mvn package
To build only the C++ library:
% mkdir build % cd build % cmake .. -DBUILD_JAVA=OFF % make package % make test-out