private void BuildList(SelectClause.List list)
{
_underlyingSelect.AddRange(list.Columns);
foreach (var(orderExpression, orderDirection) in _order.Columns)
{
if (!TryUsingExistingColumn(list, orderExpression, orderDirection))
{
AddInternalColumn(orderExpression, orderDirection);
}
}
}
private bool TryUsingExistingColumn(SelectClause.List list, Expression orderExpression, OrderDirection orderDirection)
{
for (var i = 0; i < list.Columns.Count; i++)
{
var selectColumn = list.Columns[i];
if (!selectColumn.Expression.Equals(orderExpression))
{
continue;
}
var columnName = GetProjectedColumnName(selectColumn, i);
var expr = new Expression.Identifier(columnName, false);
_orderColumns.Add((expr, orderDirection));
return(true);
}
return(false);
}
