Package org.apache.jackrabbit.oak.spi.query

Interface QueryIndex.AdvancedQueryIndex

All Known Subinterfaces:

QueryIndex.AdvanceFulltextQueryIndex

All Known Implementing Classes:

AggregateIndex, org.apache.jackrabbit.oak.plugins.index.search.spi.query.FulltextIndex, LuceneIndex, LucenePropertyIndex

Enclosing interface:

QueryIndex

public static interface QueryIndex.AdvancedQueryIndex

A query index that may support using multiple access orders (returning the rows in a specific order), and that can provide detailed information about the cost.

Method Summary

Modifier and Type	Method	Description
java.lang.String	getPlanDescription(QueryIndex.IndexPlan plan, NodeState root)	Get the query plan description (for logging purposes).
java.util.List<QueryIndex.IndexPlan>	getPlans(Filter filter, java.util.List<QueryIndex.OrderEntry> sortOrder, NodeState rootState)	Return the possible index plans for the given filter and sort order.
Cursor	query(QueryIndex.IndexPlan plan, NodeState rootState)	Start a query.

Method Detail

getPlans

java.util.List<QueryIndex.IndexPlan> getPlans(Filter filter,
                                              java.util.List<QueryIndex.OrderEntry> sortOrder,
                                              NodeState rootState)

Return the possible index plans for the given filter and sort order. Please note this method is supposed to run quickly. That means it should usually not read any data from the storage.

Parameters:

filter - the filter

sortOrder - the sort order or null if no sorting is required

rootState - root state of the current repository snapshot

Returns:

the list of index plans (null if none)

getPlanDescription

java.lang.String getPlanDescription(QueryIndex.IndexPlan plan,
                                    NodeState root)

Get the query plan description (for logging purposes).

The index plan is one of the plans that the index returned in the getPlans call.

Parameters:

plan - the index plan

root - root state of the current repository snapshot

Returns:

the query plan description

query

Cursor query(QueryIndex.IndexPlan plan,
             NodeState rootState)

Start a query. The filter and sort order of the index plan is to be used.

The index plan is one of the plans that the index returned in the getPlans call.

Parameters:

plan - the index plan to use

rootState - root state of the current repository snapshot

Returns:

a cursor to iterate over the result