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make_flat_multi_range_reader: add generator overload

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Allows creating a multi range reader from an arbitrary callable that
return std::optional<dht::partition_range>. The callable is expected to
return a new range on each call, such that passing each successive range
to `flat_mutation_reader::fast_forward_to` is valid. When exhausted the
callable is expected to return std::nullopt.
This commit is contained in:
Botond Dénes
2018-09-25 11:09:21 +03:00
parent 8c5387890d
commit 39bfd5d1df
2 changed files with 65 additions and 5 deletions
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10
flat_mutation_reader.hh
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@@ -616,6 +616,16 @@ make_flat_multi_range_reader(schema_ptr s, mutation_source source, const dht::pa
tracing::trace_state_ptr trace_state = nullptr,
flat_mutation_reader::partition_range_forwarding fwd_mr = flat_mutation_reader::partition_range_forwarding::yes);
flat_mutation_reader
make_flat_multi_range_reader(
schema_ptr s,
mutation_source source,
std::function<std::optional<dht::partition_range>()> generator,
const query::partition_slice& slice,
const io_priority_class& pc = default_priority_class(),
tracing::trace_state_ptr trace_state = nullptr,
flat_mutation_reader::partition_range_forwarding fwd_mr = flat_mutation_reader::partition_range_forwarding::yes);
flat_mutation_reader
make_flat_mutation_reader_from_fragments(schema_ptr, std::deque<mutation_fragment>);