internal FdbRangeQuery <KeyValuePair <Slice, Slice> > GetRangeCore(KeySelector begin, KeySelector end, FdbRangeOptions options, bool snapshot)
{
this.Database.EnsureKeyIsValid(begin.Key);
this.Database.EnsureKeyIsValid(end.Key, endExclusive: true);
options = FdbRangeOptions.EnsureDefaults(options, null, null, FdbStreamingMode.Iterator, false);
options.EnsureLegalValues();
#if DEBUG
if (Logging.On && Logging.IsVerbose)
{
Logging.Verbose(this, "GetRangeCore", String.Format("Getting range '{0} <= x < {1}'", begin.ToString(), end.ToString()));
}
#endif
return(new FdbRangeQuery <KeyValuePair <Slice, Slice> >(this, begin, end, (kv) => kv, snapshot, options));
}
/// <summary>
/// Reads all key-value pairs in the database snapshot represented by transaction (potentially limited by limit, target_bytes, or mode)
/// which have a key lexicographically greater than or equal to the key resolved by the begin key selector
/// and lexicographically less than the key resolved by the end key selector.
/// </summary>
/// <param name="beginInclusive">key selector defining the beginning of the range</param>
/// <param name="endExclusive">key selector defining the end of the range</param>
/// <param name="options">Optionnal query options (Limit, TargetBytes, StreamingMode, Reverse, ...)</param>
/// <param name="iteration">If streaming mode is FdbStreamingMode.Iterator, this parameter should start at 1 and be incremented by 1 for each successive call while reading this range. In all other cases it is ignored.</param>
/// <returns></returns>
public Task <FdbRangeChunk> GetRangeAsync(KeySelector beginInclusive, KeySelector endExclusive, FdbRangeOptions options = null, int iteration = 0)
{
EnsureCanRead();
m_database.EnsureKeyIsValid(beginInclusive.Key);
m_database.EnsureKeyIsValid(endExclusive.Key, endExclusive: true);
options = FdbRangeOptions.EnsureDefaults(options, null, null, FdbStreamingMode.Iterator, false);
options.EnsureLegalValues();
// The iteration value is only needed when in iterator mode, but then it should start from 1
if (iteration == 0)
{
iteration = 1;
}
return(m_handler.GetRangeAsync(beginInclusive, endExclusive, options, iteration, snapshot: false, cancellationToken: m_cancellation));
}
