private IEnumerable <IDictionary <string, EntityProperty> > InternalQuery(string filterString, IList <string> selectColumns)
{
Debug.WriteLine($"Q: {filterString}");
var parseResult = FilterStringParser.Parse(filterString);
if (!parseResult.Success)
{
throw new InvalidFilterString(parseResult.Error);
}
foreach (var row in _tableStore.GetAllRows(_table))
{
if (!parseResult.Root.Execute(row, out string error))
{
if (error != null)
{
throw new QueryFailed(error);
}
}
else
{
if (selectColumns != null)
{
yield return(row.Where(p => selectColumns.Contains(p.Key)).ToDictionary(p => p.Key, p => p.Value));
}
else
{
yield return(row);
}
}
}
}
