[jira] [Commented] (ARROW-8138) [C++] parquet::arrow::FileReader cannot read multiple RowGroup

[Francois Saint-Jacques (Jira)]

    [ 
https://issues.apache.org/jira/browse/ARROW-8138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17063347#comment-17063347
 ] 

Francois Saint-Jacques commented on ARROW-8138:
-----------------------------------------------

I confirm the issue. Thanks for reporting, we'll have a fix for the next 
release. Meanwhile, you can apply a patch locally:



{code:c++}
diff --git a/cpp/src/parquet/arrow/reader.cc b/cpp/src/parquet/arrow/reader.cc
index f75aca8956..b341c62068 100644
--- a/cpp/src/parquet/arrow/reader.cc
+++ b/cpp/src/parquet/arrow/reader.cc
@@ -783,7 +783,7 @@ Status FileReaderImpl::GetColumn(int i, 
FileColumnIteratorFactory iterator_facto
   auto ctx = std::make_shared<ReaderContext>();
   ctx->reader = reader_.get();
   ctx->pool = pool_;
-  ctx->iterator_factory = AllRowGroupsFactory();
+  ctx->iterator_factory = iterator_factory;
   ctx->filter_leaves = false;
   std::unique_ptr<ColumnReaderImpl> result;
   RETURN_NOT_OK(GetReader(manifest_.schema_fields[i], ctx, &result));

{code}


> [C++] parquet::arrow::FileReader cannot read multiple RowGroup
> --------------------------------------------------------------
>
>                 Key: ARROW-8138
>                 URL: https://issues.apache.org/jira/browse/ARROW-8138
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++
>    Affects Versions: 0.16.0
>         Environment: Centos 7
>            Reporter: Feng Tian
>            Priority: Blocker
>             Fix For: 0.17.0
>
>         Attachments: bug.cpp, bug.parquet
>
>
> When use parquet::arrow::FileReader to read parquet file consisting multiple 
> row groups,
> {code:c++}
> reader->RowGroup(i)->Column(c)->Read
> {code}
> It will repeated read data of the first rowgroup.



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