protected DataColumnAndSchema MakeDataColumnAndSchema()
{
// Make a copy of the Remembering reader that later can be discarded
// This to avoid to read in all tables in memory at the same time.
var fullReader = new RememberingFullTableReader(_reader);
fullReader.LoadAll();
var dataDict = fullReader.Data;
var fields = new List <Field>();
var datacols = new List <DataColumn>();
var numCol = _colInfos.Count;
for (var i = 0; i < numCol; i++)
{
var colInfo = _colInfos[i];
var dataName = colInfo.Name;
var dataArr = dataDict[dataName];
DataColumn column;
switch (dataArr)
{
case bool[] _:
column = new DataColumn(new DataField <bool>(dataName), dataArr);
break;
case byte[] _:
column = new DataColumn(new DataField <byte>(dataName), dataArr);
break;
case int[] _:
column = new DataColumn(new DataField <int>(dataName), dataArr);
break;
case long[] _:
column = new DataColumn(new DataField <long>(dataName), dataArr);
break;
case float[] _:
column = new DataColumn(new DataField <float>(dataName), dataArr);
break;
case double[] _:
column = new DataColumn(new DataField <double>(dataName), dataArr);
break;
case string[] _:
column = new DataColumn(new DataField <string>(dataName), dataArr);
break;
default:
continue;
}
fields.Add(column.Field);
datacols.Add(column);
}
return(new DataColumnAndSchema(datacols, new Schema(fields)));
}
public RememberingFullTableReader(RememberingFullTableReader rftr)
{
// Make a copy of existing data and reader
_importBase = rftr._importBase;
if (rftr.Data != null)
{
Data = new Dictionary <string, Array>(rftr.Data);
}
}
protected ImportTableBase()
{
_reader = new RememberingFullTableReader(this);
}
