tag | ffbf0d09bf5567e13e54ab66f2bd1691ab1be4d2 | |
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tagger | Owen O'Malley <omalley@apache.org> | Thu Mar 14 11:43:27 2019 -0700 |
object | 45b368872542e1fa1b9be675ea21ced6c9f337d8 |
ORC Release 1.5.5
commit | 45b368872542e1fa1b9be675ea21ced6c9f337d8 | [log] [tgz] |
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author | Owen O'Malley <omalley@apache.org> | Mon Mar 11 10:33:31 2019 -0700 |
committer | Owen O'Malley <omalley@apache.org> | Mon Mar 11 11:30:17 2019 -0700 |
tree | 34c379c821b8186f88213da1918d0163797c5e36 | |
parent | 5e1530f262f9fa3fad49ba028948cd7f3e025acf [diff] |
Update travis to use xcode 7.3 and 10.1. Effectively that means that we'll start testing OSX 10.13 and stop testing 10.10. 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