add cheatsheet folder readme #1
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Thanks for opening a pull request! If this is not a minor PR. Could you open an issue for this pull request on JIRA? https://issues.apache.org/jira/browse/ARROW Opening JIRAs ahead of time contributes to the Openness of the Apache Arrow project. Then could you also rename pull request title in the following format? or See also: |
pachadotdev
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Error log of Valgrind failure:
```
[----------] 3 tests from TestArrowReadDeltaEncoding
[ RUN ] TestArrowReadDeltaEncoding.DeltaBinaryPacked
[ OK ] TestArrowReadDeltaEncoding.DeltaBinaryPacked (812 ms)
[ RUN ] TestArrowReadDeltaEncoding.DeltaByteArray
==12587== Conditional jump or move depends on uninitialised value(s)
==12587== at 0x4F12C57: Advance (bit_stream_utils.h:426)
==12587== by 0x4F12C57: parquet::(anonymous namespace)::DeltaBitPackDecoder<parquet::PhysicalType<(parquet::Type::type)1> >::GetInternal(int*, int) (encoding.cc:2216)
==12587== by 0x4F13823: Decode (encoding.cc:2091)
==12587== by 0x4F13823: parquet::(anonymous namespace)::DeltaByteArrayDecoder::SetData(int, unsigned char const*, int) (encoding.cc:2360)
==12587== by 0x4E89EF5: parquet::(anonymous namespace)::ColumnReaderImplBase<parquet::PhysicalType<(parquet::Type::type)6> >::InitializeDataDecoder(parquet::DataPage const&, long) (column_reader.cc:797)
==12587== by 0x4E9AE63: ReadNewPage (column_reader.cc:614)
==12587== by 0x4E9AE63: HasNextInternal (column_reader.cc:576)
==12587== by 0x4E9AE63: parquet::internal::(anonymous namespace)::TypedRecordReader<parquet::PhysicalType<(parquet::Type::type)6> >::ReadRecords(long) (column_reader.cc:1228)
==12587== by 0x4DFB19F: parquet::arrow::(anonymous namespace)::LeafReader::LoadBatch(long) (reader.cc:467)
==12587== by 0x4DF513C: parquet::arrow::ColumnReaderImpl::NextBatch(long, std::shared_ptr<arrow::ChunkedArray>*) (reader.cc:108)
==12587== by 0x4DFB74D: parquet::arrow::(anonymous namespace)::FileReaderImpl::ReadColumn(int, std::vector<int, std::allocator<int> > const&, parquet::arrow::ColumnReader*, std::shared_ptr<arrow::ChunkedArray>*) (reader.cc:273)
==12587== by 0x4E11FDA: operator() (reader.cc:1180)
==12587== by 0x4E11FDA: arrow::Future<std::vector<std::shared_ptr<arrow::ChunkedArray>, std::allocator<arrow::Future> > > arrow::internal::OptionalParallelForAsync<parquet::arrow::(anonymous namespace)::FileReaderImpl::DecodeRowGroups(std::shared_ptr<parquet::arrow::(anonymous namespace)::FileReaderImpl>, std::vector<int, std::allocator<int> > const&, std::vector<int, std::allocator<int> > const&, arrow::internal::Executor*)::{lambda(unsigned long, std::shared_ptr<parquet::arrow::ColumnReaderImpl>)#1}&, std::shared_ptr<parquet::arrow::ColumnReaderImpl>, std::shared_ptr<arrow::ChunkedArray> >(bool, std::vector<std::shared_ptr<parquet::arrow::ColumnReaderImpl>, std::allocator<arrow::Future<std::vector<std::shared_ptr<arrow::ChunkedArray>, std::allocator<arrow::Future> > > > >, parquet::arrow::(anonymous namespace)::FileReaderImpl::DecodeRowGroups(std::shared_ptr<parquet::arrow::(anonymous namespace)::FileReaderImpl>, std::vector<int, std::allocator<int> > const&, std::vector<int, std::allocator<int> > const&, arrow::internal::Executor*)::{lambda(unsigned long, std::shared_ptr<parquet::arrow::ColumnReaderImpl>)#1}&, arrow::internal::Executor*) (parallel.h:95)
==12587== by 0x4E126A9: parquet::arrow::(anonymous namespace)::FileReaderImpl::DecodeRowGroups(std::shared_ptr<parquet::arrow::(anonymous namespace)::FileReaderImpl>, std::vector<int, std::allocator<int> > const&, std::vector<int, std::allocator<int> > const&, arrow::internal::Executor*) (reader.cc:1198)
==12587== by 0x4E12F50: parquet::arrow::(anonymous namespace)::FileReaderImpl::ReadRowGroups(std::vector<int, std::allocator<int> > const&, std::vector<int, std::allocator<int> > const&, std::shared_ptr<arrow::Table>*) (reader.cc:1160)
==12587== by 0x4DFA2BC: parquet::arrow::(anonymous namespace)::FileReaderImpl::ReadTable(std::vector<int, std::allocator<int> > const&, std::shared_ptr<arrow::Table>*) (reader.cc:198)
==12587== by 0x4DFA392: parquet::arrow::(anonymous namespace)::FileReaderImpl::ReadTable(std::shared_ptr<arrow::Table>*) (reader.cc:289)
==12587== by 0x1DCE62: parquet::arrow::TestArrowReadDeltaEncoding::ReadTableFromParquetFile(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::shared_ptr<arrow::Table>*) (arrow_reader_writer_test.cc:4174)
==12587== by 0x2266D2: parquet::arrow::TestArrowReadDeltaEncoding_DeltaByteArray_Test::TestBody() (arrow_reader_writer_test.cc:4209)
==12587== by 0x4AD2C9B: void testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) (gtest.cc:2607)
==12587== by 0x4AC9DD1: void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) (gtest.cc:2643)
==12587== by 0x4AA4C02: testing::Test::Run() (gtest.cc:2682)
==12587== by 0x4AA563A: testing::TestInfo::Run() (gtest.cc:2861)
==12587== by 0x4AA600F: testing::TestSuite::Run() (gtest.cc:3015)
==12587== by 0x4AB631B: testing::internal::UnitTestImpl::RunAllTests() (gtest.cc:5855)
==12587== by 0x4AD3CE7: bool testing::internal::HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) (gtest.cc:2607)
==12587== by 0x4ACB063: bool testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) (gtest.cc:2643)
==12587== by 0x4AB47B6: testing::UnitTest::Run() (gtest.cc:5438)
==12587== by 0x4218918: RUN_ALL_TESTS() (gtest.h:2490)
==12587== by 0x421895B: main (gtest_main.cc:52)
```
Closes apache#11725 from pitrou/ARROW-14704-parquet-valgrind
Authored-by: Antoine Pitrou <antoine@python.org>
Signed-off-by: Antoine Pitrou <antoine@python.org>
pachadotdev
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Mar 31, 2022
TODOs: Convert cheat sheet to PDF and hide slide #1. Closes apache#12445 from pachadotdev/patch-4 Lead-authored-by: Stephanie Hazlitt <stephhazlitt@gmail.com> Co-authored-by: Pachá <mvargas@dcc.uchile.cl> Co-authored-by: Mauricio Vargas <mavargas11@uc.cl> Co-authored-by: Pachá <mavargas11@uc.cl> Signed-off-by: Jonathan Keane <jkeane@gmail.com>
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/cheatsheetfolderREADME.mdwith details on the cheatsheet contentREADME.mdarrow-cheatsheet