// Constructors
/// <summary>
/// Initializes a new instance of this class.
/// </summary>
/// <param name="source">The <see cref="UnaryProvider.Source"/> property value.</param>
/// <param name="columnName">The name of <see cref="SystemColumn"/>.</param>
public RowNumberProvider(CompilableProvider source, string columnName)
: base(ProviderType.RowNumber, source)
{
SystemColumn = new SystemColumn(columnName, Source.Header.Length, WellKnownTypes.Int64);
Initialize();
}
// Constructors
/// <summary>
/// Initializes a new instance of this class.
/// </summary>
/// <param name="source">The <see cref="UnaryProvider.Source"/> property value.</param>
/// <param name="columnName">The name of <see cref="SystemColumn"/>.</param>
public RowNumberProvider(CompilableProvider source, string columnName)
: base(ProviderType.RowNumber, source)
{
SystemColumn = new SystemColumn(columnName, Source.Header.Length, typeof(long));
Initialize();
}