public class ClusteringIndexSliceFilter extends AbstractClusteringIndexFilter
ClusteringIndexFilter.InternalDeserializer, ClusteringIndexFilter.Kind, ClusteringIndexFilter.Serializer
reversed
Constructor and Description |
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ClusteringIndexSliceFilter(Slices slices,
boolean reversed) |
Modifier and Type | Method and Description |
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UnfilteredRowIterator |
filterNotIndexed(ColumnFilter columnFilter,
UnfilteredRowIterator iterator)
Returns an iterator that only returns the rows of the provided iterator that this filter selects.
|
ClusteringIndexSliceFilter |
forPaging(ClusteringComparator comparator,
Clustering lastReturned,
boolean inclusive)
Returns a filter for continuing the paging of this filter given the last returned clustering prefix.
|
Slices |
getSlices(CFMetaData metadata) |
UnfilteredRowIterator |
getUnfilteredRowIterator(ColumnFilter columnFilter,
Partition partition)
Given a partition, returns a row iterator for the rows of this partition that are selected by this filter.
|
boolean |
isFullyCoveredBy(CachedPartition partition)
Returns whether we can guarantee that a given cached partition contains all the data selected by this filter.
|
boolean |
isHeadFilter()
Whether this filter selects the head of a partition (i.e.
|
ClusteringIndexFilter.Kind |
kind() |
Slices |
requestedSlices() |
boolean |
selects(Clustering clustering)
Whether a given row is selected by this filter.
|
boolean |
selectsAllPartition()
Whether this filter selects all the row of a partition (it's an "identity" filter).
|
protected long |
serializedSizeInternal(int version) |
protected void |
serializeInternal(DataOutputPlus out,
int version) |
boolean |
shouldInclude(SSTableReader sstable)
Whether the provided sstable may contain data that is selected by this filter (based on the sstable metadata).
|
java.lang.String |
toCQLString(CFMetaData metadata) |
java.lang.String |
toString(CFMetaData metadata) |
appendOrderByToCQLString, isReversed
public ClusteringIndexSliceFilter(Slices slices, boolean reversed)
public Slices requestedSlices()
public boolean selectsAllPartition()
ClusteringIndexFilter
public boolean selects(Clustering clustering)
ClusteringIndexFilter
clustering
- the clustering of the row to test the selection of.clustering
is selected by this filter.public ClusteringIndexSliceFilter forPaging(ClusteringComparator comparator, Clustering lastReturned, boolean inclusive)
ClusteringIndexFilter
comparator
- the comparator for the table this is a filter for.lastReturned
- the last clustering that was returned for the query we are paging for. The
resulting filter will be such that results coming after lastReturned
are returned
(where coming after means "greater than" if the filter is not reversed, "lesser than" otherwise;
futher, whether the comparison is strict or not depends on inclusive
).inclusive
- whether or not we want to include the lastReturned
in the newly returned
page of results.lastReturned
.public boolean isFullyCoveredBy(CachedPartition partition)
ClusteringIndexFilter
partition
- the cached partition. This method assumed that the rows of this partition contains all the table columns.partition
.public boolean isHeadFilter()
ClusteringIndexFilter
public UnfilteredRowIterator filterNotIndexed(ColumnFilter columnFilter, UnfilteredRowIterator iterator)
ClusteringIndexFilter
This method is the "dumb" counterpart to ClusteringIndexFilter.getSlices(CFMetaData)
in that it has no way to quickly get
to what is actually selected, so it simply iterate over it all and filters out what shouldn't be returned. This should
be avoided in general.
Another difference with ClusteringIndexFilter.getSlices(CFMetaData)
is that this method also filter the queried
columns in the returned result, while the former assumes that the provided iterator has already done it.
columnFilter
- the columns to include in the rows of the result iterator.iterator
- the iterator for which we should filter rows.iterator
that are selected by this filter.public Slices getSlices(CFMetaData metadata)
public UnfilteredRowIterator getUnfilteredRowIterator(ColumnFilter columnFilter, Partition partition)
ClusteringIndexFilter
columnFilter
- the columns to include in the rows of the result iterator.partition
- the partition containing the rows to filter.partition
that are selected by this filter.public boolean shouldInclude(SSTableReader sstable)
ClusteringIndexFilter
sstable
- the sstable for which we want to test the need for inclusion.sstable
should be included to answer this filter.public java.lang.String toString(CFMetaData metadata)
public java.lang.String toCQLString(CFMetaData metadata)
public ClusteringIndexFilter.Kind kind()
protected void serializeInternal(DataOutputPlus out, int version) throws java.io.IOException
serializeInternal
in class AbstractClusteringIndexFilter
java.io.IOException
protected long serializedSizeInternal(int version)
serializedSizeInternal
in class AbstractClusteringIndexFilter
Copyright © 2018 The Apache Software Foundation