/// <summary>
/// This method extracts metadata and actual data for each column supplied
/// by extracting data and information from every DataFrameColumn.
/// </summary>
public unsafe void ExtractColumns(DataFrame CSharpDataFrame)
{
Logging.Trace("CSharpOutputDataSet::ExtractColumns");
_strLenOrNullMapPtrs = new int *[ColumnsNumber];
_dataPtrs = new void *[ColumnsNumber];
for (ushort columnNumber = 0; columnNumber < ColumnsNumber; ++columnNumber)
{
DataFrameColumn column = CSharpDataFrame.Columns[columnNumber];
// Add column metadata to a CSharpColumn dictionary
//
_columns[columnNumber] = new CSharpColumn
{
Name = column.Name,
DataType = DataTypeMap[column.DataType],
Nullable = (short)(column.NullCount > 0 ? 1 : 0),
DecimalDigits = 0,
Size = (ulong)DataTypeSize[DataTypeMap[column.DataType]],
Id = columnNumber
};
// Extract actual column data from a DataFrameColumn and store into a void pointers array
//
ExtractColumn(columnNumber, column);
}
}
/// <summary>
/// This method appends each column as a CSharpColumn object to a dictionary.
/// </summary>
public void InitColumn(
ushort columnNumber,
string columnName,
ulong columnSize,
SqlDataType dataType,
short nullable,
short decimalDigits)
{
Logging.Trace("CSharpInputDataSet::InitColumn");
if (columnName == null)
{
throw new ArgumentException("Invalid input column name supplied");
}
else if (columnNumber >= ColumnsNumber || columnNumber < 0)
{
throw new ArgumentException("Invalid input column id supplied: " + columnNumber.ToString());
}
_columns[columnNumber] = new CSharpColumn
{
Name = columnName,
DataType = dataType,
DecimalDigits = decimalDigits,
Nullable = nullable,
Size = columnSize,
Id = columnNumber
};
}