Package com.apple.foundationdb.record.query.plan.planning

Class RankComparisons

java.lang.Object

com.apple.foundationdb.record.query.plan.planning.RankComparisons

@API(INTERNAL)
public class RankComparisons
extends Object

Track comparisons involving rank-type functions.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	RankComparisons.RankComparison	A single rank function comparison.

Constructor Summary

Constructors

Constructor	Description
RankComparisons(QueryComponent filter, List<Index> indexes)

Method Summary

Modifier and Type	Method	Description
static boolean	createsDuplicates(Index index, GroupingKeyExpression indexExpr)
RankComparisons.RankComparison	getPlanComparison(QueryRecordFunctionWithComparison comparison)
static boolean	matchesSort(GroupingKeyExpression indexExpr, KeyExpression sort)
QueryComponent	planComparisonSubstitute(QueryComponent component)
List<QueryComponent>	planComparisonSubstitutes(List<QueryComponent> components)
static String	scoreForRankFunction(QueryRecordFunctionWithComparison comparison)
RecordQueryPlan	wrap(RecordQueryPlan plan, Set<RankComparisons.RankComparison> includedRankComparisons, RecordMetaData metaData)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RankComparisons

public RankComparisons(@Nullable
                       QueryComponent filter,
                       @Nonnull
                       List<Index> indexes)

Method Detail

getPlanComparison

@Nullable
public RankComparisons.RankComparison getPlanComparison(@Nonnull
                                                        QueryRecordFunctionWithComparison comparison)

planComparisonSubstitute

@Nonnull
public QueryComponent planComparisonSubstitute(@Nonnull
                                               QueryComponent component)

planComparisonSubstitutes

@Nullable
public List<QueryComponent> planComparisonSubstitutes(@Nullable
                                                      List<QueryComponent> components)

wrap

@Nonnull
public RecordQueryPlan wrap(@Nonnull
                            RecordQueryPlan plan,
                            @Nullable
                            Set<RankComparisons.RankComparison> includedRankComparisons,
                            @Nonnull
                            RecordMetaData metaData)

scoreForRankFunction

public static String scoreForRankFunction(@Nonnull
                                          QueryRecordFunctionWithComparison comparison)

matchesSort

public static boolean matchesSort(@Nonnull
                                  GroupingKeyExpression indexExpr,
                                  @Nullable
                                  KeyExpression sort)

createsDuplicates

public static boolean createsDuplicates(@Nonnull
                                        Index index,
                                        @Nonnull
                                        GroupingKeyExpression indexExpr)