dynamic LogicalWriter

[ierror]

I want to loop over my schema and make the DateTime part of

rowGroup.NextColumn().LogicalWriter<DateTime>();

dynamic.

Since my schema is dynamic and I have already defined all DataTypes for my columns in the schema, this step seems superfluous to me

Any idea how i can solve this?

[adamreeve]

You might want to implement an ILogicalColumnWriterVisitor so the DateTime type becomes a generic parameter. You can see one example of use of an ILogicalColumnWriterVisitor in the tests:

ParquetSharp/csharp.test/TestLogicalTypeRoundtrip.cs

Line 43 in 1b82136

columnWriter.Apply(new LogicalValueSetter(column.Values, rowsPerBatch));

and:

ParquetSharp/csharp.test/LogicalValueSetter.cs

Line 5 in 1b82136

internal sealed class LogicalValueSetter : ILogicalColumnWriterVisitor<Array>

Another good example is in ParquetSharp.DataFrame: https://github.com/G-Research/ParquetSharp.DataFrame/blob/c21717c434f74d18b5a86a3ba75465b8757a83bb/ParquetSharp.DataFrame/DataFrameWriter.cs#L8

[ierror]

Thank you!