How to get column value enumerator If I don't know ahead of time the types for each column

[zhengshy2016]

Hey, guy. I am trying to get the column value enumerator, but I don't know ahead of time the types of each column. Is this the correct way to get the column value enumerator? Thanks for the help.

var columnEnumerator = rowGroupReader.Column(0).LogicalReader().Apply(new ColumnValuesEnumerator());

sealed class ColumnValuesEnumerator : ILogicalColumnReaderVisitor<IEnumerator>
{
        public IEnumerator OnLogicalColumnReader<TElement>(LogicalColumnReader<TElement> logicalColumnReader)
        {         
            return logicalColumnReader.GetEnumerator();
        }
}

[adamreeve]

Hi @zhengshy2016

Yes, although you're returning an untyped enumerator, the IEnumerable interface is only implemented by the typed LogicalColumnReader<TElement> class, so using an ILogicalColumnReaderVisitor as you've demonstrated is the best approach.