/// <summary>Return all the keys that share a common prefix</summary>
/// <param name="query">Source database query</param>
/// <param name="prefix">Shared prefix</param>
/// <returns>Query that will return the keys that share the specified <paramref name="prefix"/></returns>
public static IFdbAsyncSequenceQueryable <KeyValuePair <Slice, Slice> > RangeStartsWith(this IFdbDatabaseQueryable query, Slice prefix)
{
if (query == null)
{
throw new ArgumentNullException(nameof(query));
}
var expr = FdbQueryExpressions.RangeStartsWith(prefix);
return(query.Provider.CreateSequenceQuery(expr));
}
/// <summary>Return a range of keys</summary>
/// <param name="query">Source database query</param>
/// <param name="range">Pair of key selectors</param>
/// <returns>Query that will return the keys from the specified <paramref name="range"/></returns>
public static IFdbAsyncSequenceQueryable <KeyValuePair <Slice, Slice> > Range(this IFdbDatabaseQueryable query, FdbKeySelectorPair range)
{
if (query == null)
{
throw new ArgumentNullException("query");
}
var expr = FdbQueryExpressions.Range(range);
return(query.Provider.CreateSequenceQuery(expr));
}