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Posted to dev@parquet.apache.org by "Wes McKinney (JIRA)" <ji...@apache.org> on 2019/05/08 15:52:00 UTC

[jira] [Resolved] (PARQUET-1571) [C++] Can't read data from parquet file in C++ library

     [ https://issues.apache.org/jira/browse/PARQUET-1571?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wes McKinney resolved PARQUET-1571.
-----------------------------------
       Resolution: Fixed
    Fix Version/s: cpp-1.6.0

Issue resolved by pull request 4275
[https://github.com/apache/arrow/pull/4275]

> [C++] Can't read data from parquet file in C++ library
> ------------------------------------------------------
>
>                 Key: PARQUET-1571
>                 URL: https://issues.apache.org/jira/browse/PARQUET-1571
>             Project: Parquet
>          Issue Type: Bug
>          Components: parquet-cpp
>            Reporter: worker24h
>            Priority: Critical
>              Labels: pull-request-available
>             Fix For: cpp-1.6.0
>
>          Time Spent: 1h 40m
>  Remaining Estimate: 0h
>
> Specified the second param *parquet::ReaderProperties* When I used parquet::ParquetFileReader::Open, it can't work.
>  The following code:
> {code:java}
> parquet::ReaderProperties _properties;
> _properties = parquet::ReaderProperties(); 
> _properties.enable_buffered_stream();  // used  buffer stream.  Don't set buffer-size
> parquet_reader = parquet::ParquetFileReader::Open(_parquet, _properties);
> ...
> int32_t value;
> parquet::Int32Reader* int32_reader =
> static_cast<parquet::Int32Reader*>(column_reader.get());
> int32_reader->Skip(_current_line_of_group);// skip lines of processed.
> rows_read = int32_reader->ReadBatch(1, nullptr, nullptr, &value, &values_read);  
> {code}
> The interface *Skip* throw exception:
> {color:#FF0000}{{Couldn't deserialize thrift: TProtocolException: Invalid data Deserializing page header failed.}}{color}
>  



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