[PARQUET-1047] Anyway to write empty row group?

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: cpp-1.1.0
• Fix Version/s: cpp-1.1.0
• Component/s: parquet-cpp
• Assignee: Unassigned
• Reporter: yugu
• Created: 28/Jun/17 20:38
• Updated: 29/Jun/17 16:54
• Resolved: 29/Jun/17 16:54

Description

[Error]
So I'm trying to write only header information (column names and such).

parquet::RowGroupWriter* rg_writer =
                file_writer->AppendRowGroup(0);
for (i = 0; i < Cols; i++){
parquet::BoolWriter* writer = static_cast<parquet::BoolWriter*>(rg_writer->NextColumn());
writer->WriteBatch(0, nullptr, nullptr, nullptr);
}

The problem is that when trying to close the file_writer, the program throws:

Parquet what error: Parquet Write error: Column 3 is not complete.

[Possbility]
I know this is possible because as per this post an empty row group was written to the back.

Tho the problem was present in parquet-mr instead of parquet-cpp, I guess it's fair to expect some feature like that.

Or maybe I don't fully understand how the system works.... would be great if you guys can point out where to look it : D