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https://issues.apache.org/jira/browse/PARQUET-1571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16835446#comment-16835446
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worker24h commented on PARQUET-1571:
------------------------------------
parquet::ReaderProperties _properties;
_properties = parquet::ReaderProperties();
_properties.enable_buffered_stream(); // used buffer stream. Don't set
buffer-sizeparquet_reader = parquet::ParquetFileReader::Open(_parquet,
_properties);
Don't invoke interface {color:#FF0000}_properties.set_buffer_size(){color} if I
forgot ,then library throw exception. How to solve this problem?? You can't
guarantee how the user will use it.
So I recommend providing the default, for example :size=1024 (one page size)
> [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
> Time Spent: 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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