de.lmu.ifi.dbs.elki.database.query

Interface DatabaseQuery

All Known Subinterfaces:

DistanceQuery<O>, DistanceSimilarityQuery<O>, DoubleRelation, IndexBasedDistanceFunction.Instance<T,I>, IndexBasedSimilarityFunction.Instance<T,I>, KNNQuery<O>, LinearScanQuery, ModifiableRelation<O>, RangeQuery<O>, Relation<O>, RKNNQuery<O>, SimilarityQuery<O>, SpatialDistanceQuery<V>

All Known Implementing Classes:

AbstractDatabaseDistanceFunction.Instance, AbstractDatabaseDistanceQuery, AbstractDBIDSimilarityQuery, AbstractDistanceKNNQuery, AbstractDistanceQuery, AbstractDistanceRangeQuery, AbstractIndexBasedDistanceFunction.Instance, AbstractIndexBasedSimilarityFunction.Instance, AbstractRefiningIndex.AbstractKNNQuery, AbstractRefiningIndex.AbstractRangeQuery, AbstractRelation, AbstractRKNNQuery, AbstractSimilarityAdapter.Instance, AbstractSimilarityQuery, ArccosSimilarityAdapter.Instance, ConvertToStringView, CoverTree.CoverTreeKNNQuery, CoverTree.CoverTreeRangeQuery, DBIDDistanceQuery, DBIDRangeDistanceQuery, DBIDView, EuclideanRStarTreeKNNQuery, EuclideanRStarTreeRangeQuery, FractionalSharedNearestNeighborSimilarityFunction.Instance, InMemoryIDistanceIndex.IDistanceKNNQuery, InMemoryIDistanceIndex.IDistanceRangeQuery, InMemoryInvertedIndex.ArcCosineKNNQuery, InMemoryInvertedIndex.ArcCosineRangeQuery, InMemoryInvertedIndex.CosineKNNQuery, InMemoryInvertedIndex.CosineRangeQuery, InMemoryLSHIndex.Instance.LSHKNNQuery, InMemoryLSHIndex.Instance.LSHRangeQuery, LinearAdapterLinear.Instance, LinearScanDistanceKNNQuery, LinearScanDistanceRangeQuery, LinearScanEuclideanDistanceKNNQuery, LinearScanEuclideanDistanceRangeQuery, LinearScanPrimitiveDistanceKNNQuery, LinearScanPrimitiveDistanceRangeQuery, LinearScanRKNNQuery, LnSimilarityAdapter.Instance, MaterializedDoubleRelation, MaterializedRelation, MetricalIndexKNNQuery, MetricalIndexRangeQuery, MinimalisticMemoryKDTree.KDTreeKNNQuery, MinimalisticMemoryKDTree.KDTreeRangeQuery, MkTreeRKNNQuery, NaiveProjectedKNNPreprocessor.NaiveProjectedKNNQuery, PartialVAFile.PartialVAFileKNNQuery, PartialVAFile.PartialVAFileRangeQuery, PrecomputedDistanceMatrix.PrecomputedDistanceQuery, PreprocessorKNNQuery, PreprocessorRKNNQuery, PrimitiveDistanceQuery, PrimitiveDistanceSimilarityQuery, PrimitiveSimilarityQuery, ProjectedIndex.ProjectedKNNQuery, ProjectedIndex.ProjectedRangeQuery, ProjectedIndex.ProjectedRKNNQuery, ProjectedView, ProxyView, RStarTreeKNNQuery, RStarTreeRangeQuery, SharedNearestNeighborJaccardDistanceFunction.Instance, SharedNearestNeighborSimilarityFunction.Instance, SimplifiedCoverTree.CoverTreeKNNQuery, SimplifiedCoverTree.CoverTreeRangeQuery, SmallMemoryKDTree.KDTreeKNNQuery, SmallMemoryKDTree.KDTreeRangeQuery, SpacefillingKNNPreprocessor.SpaceFillingKNNQuery, SpatialPrimitiveDistanceQuery, VAFile.VAFileKNNQuery, VAFile.VAFileRangeQuery

public interface DatabaseQuery

General interface for database queries. Will only contain elemental stuff such as some hints.

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
static String	HINT_BULK Optimizer hint: request bulk support.
static String	HINT_EXACT Optimizer hint: exact - no approximations allowed!
static String	HINT_HEAVY_USE Optimizer hint: heavy use - caching/preprocessing/approximation recommended
static String	HINT_NO_CACHE Optimizer hint: no cache instances
static String	HINT_OPTIMIZED_ONLY Optimizer hint: no linear scans allowed - return null then!
static String	HINT_SINGLE Optimizer hint: only a single request will be done - avoid expensive optimizations

Field Detail

HINT_BULK

static final String HINT_BULK

Optimizer hint: request bulk support.

See Also:

Constant Field Values

HINT_SINGLE

static final String HINT_SINGLE

Optimizer hint: only a single request will be done - avoid expensive optimizations

See Also:

Constant Field Values

HINT_OPTIMIZED_ONLY

static final String HINT_OPTIMIZED_ONLY

Optimizer hint: no linear scans allowed - return null then!

See Also:

Constant Field Values

HINT_HEAVY_USE

static final String HINT_HEAVY_USE

Optimizer hint: heavy use - caching/preprocessing/approximation recommended

See Also:

Constant Field Values

HINT_EXACT

static final String HINT_EXACT

Optimizer hint: exact - no approximations allowed!

See Also:

Constant Field Values

HINT_NO_CACHE

static final String HINT_NO_CACHE

Optimizer hint: no cache instances

See Also:

Constant Field Values