Benedict created CASSANDRA-7107:
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Summary: General minor tidying of CollationController path
Key: CASSANDRA-7107
URL: https://issues.apache.org/jira/browse/CASSANDRA-7107
Project: Cassandra
Issue Type: Improvement
Components: Core
Reporter: Benedict
Assignee: Benedict
Priority: Minor
Fix For: 2.1.0
There is a lot of unnecessary boiler plate when grabbing an iterator from an
in-memory column family. This patch:
* Removes FakeCellName
* Avoids wrapping a non-OnDiskAtomIterator as an OnDiskAtomIterator except when
the wrapping is useful
* Removes ColumnSlice.NavigableSetIterator and creates a simpler more direct
equivalent in ABTC
* Does not construct a SliceIterator in either ABSC or ABTC if only one slice
is requested (just returns that slice as an Iterator)
* Does not construct multiple list indirections in ABSC when constructing a
slice
* Shares forward/reverse iterators in ABSC between slices and full-iteration
* Avoids O(N) comparisons during collation of results into an ABSC, by using
the knowledge that all columns are provided in insertion order from a merge
iterator
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