Support variable-size byte array encoding for decimals

Version: Parquet.Net v3.9.1

Runtime Version: .Net 5.0

OS: Windows 10

Expected behavior

I would expect Parquet.Net to identify the DataTypeHandler appropriately for the column in question.

Actual behavior

Parquet.Net is throwing the aforementioned exception when I access parquetReader.Schema.

From ParquetViewer, the column in question is:

  "Schema": [
    {
      "Field_id": 0,
      "Name": "CONTACT_ID",
      "Type": "BYTE_ARRAY",
      "Type_length": 0,
      "LogicalType": null,
      "Scale": 4,
      "Precision": 23,
      "Repetition_type": "OPTIONAL",
      "Converted_type": "DECIMAL"
    },

Steps to reproduce the behavior

1. Step 1 - open a ParquetReader against the file.
2. Step 2 - access ParquetReader.Schema when one of the columns is as described above

Code snippet reproducing the behavior

using (Stream fileStream = System.IO.File.OpenRead(fileName))
{
   using (var parquetReader = new ParquetReader(fileStream))
   {
      Schema schema = parquetReader.Schema;
   }
}

I am unfortunately unable to share a copy of the file in question. If there is a tool that will allow me to extract a subset easily, I could likely share a file with just this column.

[aloneguid]

Not ready yet )

[jchristn]

Issue resolved in v4.3.3