org.apache.ignite.cache.query

Class Query<R>

java.lang.Object

org.apache.ignite.cache.query.Query<R>

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

AbstractContinuousQuery, IndexQuery, ScanQuery, SpiQuery, SqlFieldsQuery, SqlQuery, TextQuery, VectorQuery

public abstract class Query<R>
extends Object
implements Serializable

Main API for configuring and executing cache queries. Supported queries are:

• SQL Fields query.Provides SQL way with full syntax to access cache data. See SqlFieldsQuery for details.
• Full-text query. Uses full-text search engine based on Apache Lucene engine. See TextQuery for details.
• Scan query. Provides effective and flexible way to full cache\partition scan. See ScanQuery for details.
• Continuous query. Provides flexible way to process all existed cache data and all future cache updates as well. See ContinuousQuery for details.
• Spi query. Allow run queries for pluggable user query engine implementation. See SpiQuery for details.

See Also:

IgniteCache.query(Query), Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static int	DFLT_PAGE_SIZE Default query page size.

Method Summary

Modifier and Type	Method and Description
int	getPageSize() Gets optional page size, if 0, then default is used.
boolean	isLocal() Returns true if this query should be executed on local node only.
protected int[]	prepare(int[] parts) Prepares the partitions.
Query<R>	setLocal(boolean loc) Sets whether this query should be executed on local node only.
Query<R>	setPageSize(int pageSize) Sets optional page size, if 0, then default is used.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

DFLT_PAGE_SIZE

public static final int DFLT_PAGE_SIZE

Default query page size.

See Also:

Constant Field Values

Method Detail

getPageSize

public int getPageSize()

Gets optional page size, if 0, then default is used.

Returns:

Optional page size.

setPageSize

public Query<R> setPageSize(int pageSize)

Sets optional page size, if 0, then default is used.

Parameters:

pageSize - Optional page size.

Returns:

this for chaining.

isLocal

public boolean isLocal()

Returns true if this query should be executed on local node only.

Returns:

Local flag.

setLocal

public Query<R> setLocal(boolean loc)

Sets whether this query should be executed on local node only.

Parameters:

loc - Local flag.

Returns:

this for chaining.

prepare

protected int[] prepare(int[] parts)

Prepares the partitions.

Parameters:

parts - Partitions.

toString

public String toString()

Overrides:

toString in class Object