org.apache.ignite.cache

Class QueryIndex

java.lang.Object

org.apache.ignite.cache.QueryIndex

All Implemented Interfaces:

Serializable

public class QueryIndex
extends Object
implements Serializable

Contains list of fields to be indexed. It is possible to provide field name suffixed with index specific extension, for example for sorted index the list can be provided as following (id, name asc, age desc).

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static int	DFLT_INLINE_SIZE Default index inline size.

Constructor Summary

Constructors

Constructor and Description
QueryIndex() Creates an empty index.
QueryIndex(Collection<String> fields, QueryIndexType type) Creates index for a collection of fields.
QueryIndex(LinkedHashMap<String,Boolean> fields, QueryIndexType type) Creates index for a collection of fields.
QueryIndex(String field) Creates single-field sorted ascending index.
QueryIndex(String field, boolean asc) Creates single-field sorted index.
QueryIndex(String field, boolean asc, String name) Creates single-field sorted index.
QueryIndex(String field, QueryIndexType type) Creates index for one field.
QueryIndex(String field, QueryIndexType type, boolean asc) Creates index for one field.
QueryIndex(String field, QueryIndexType type, boolean asc, String name) Creates index for one field.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
Collection<String>	getFieldNames()
LinkedHashMap<String,Boolean>	getFields() Gets fields included in the index.
QueryIndexType	getIndexType() Gets index type.
int	getInlineSize() Gets index inline size in bytes.
String	getName() Gets index name.
int	hashCode()
QueryIndex	setFieldNames(Collection<String> fields, boolean asc) Sets a collection of field names altogether with the field sorting direction.
QueryIndex	setFields(LinkedHashMap<String,Boolean> fields) Sets fields included in the index.
QueryIndex	setIndexType(QueryIndexType type) Sets index type.
QueryIndex	setInlineSize(int inlineSize) Sets index inline size in bytes.
QueryIndex	setName(String name) Sets index name.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

DFLT_INLINE_SIZE

public static final int DFLT_INLINE_SIZE

Default index inline size.

See Also:

Constant Field Values

Constructor Detail

QueryIndex

public QueryIndex()

Creates an empty index. Should be populated via setters.

QueryIndex

public QueryIndex(String field)

Creates single-field sorted ascending index.

Parameters:

field - Field name.

QueryIndex

public QueryIndex(String field,
                  boolean asc)

Creates single-field sorted index.

Parameters:

field - Field name.

asc - Ascending flag.

QueryIndex

public QueryIndex(String field,
                  boolean asc,
                  String name)

Creates single-field sorted index.

Parameters:

field - Field name.

asc - Ascending flag.

name - Index name.

QueryIndex

public QueryIndex(String field,
                  QueryIndexType type)

Creates index for one field. If index is sorted, then ascending sorting is used by default. To specify sort order, use the next method. This constructor should also have a corresponding setter method.

Parameters:

field - Field name.

type - Index type.

QueryIndex

public QueryIndex(String field,
                  QueryIndexType type,
                  boolean asc)

Creates index for one field. The last boolean parameter is ignored for non-sorted indexes.

Parameters:

field - Field name.

type - Index type.

asc - Ascending flag.

QueryIndex

public QueryIndex(String field,
                  QueryIndexType type,
                  boolean asc,
                  String name)

Creates index for one field. The last boolean parameter is ignored for non-sorted indexes.

Parameters:

field - Field name.

type - Index type.

asc - Ascending flag.

name - Index name.

QueryIndex

public QueryIndex(Collection<String> fields,
                  QueryIndexType type)

Creates index for a collection of fields. If index is sorted, fields will be sorted in ascending order.

Parameters:

fields - Collection of fields to create an index.

type - Index type.

QueryIndex

public QueryIndex(LinkedHashMap<String,Boolean> fields,
                  QueryIndexType type)

Creates index for a collection of fields. The order of fields in the created index will be the same as iteration order in the passed map. Map value defines whether the index will be ascending.

Parameters:

fields - Field name to field sort direction for sorted indexes.

type - Index type.

Method Detail

getName

public String getName()

Gets index name. Will be automatically set if not provided by a user.

Returns:

Index name.

setName

public QueryIndex setName(String name)

Sets index name.

Parameters:

name - Index name.

Returns:

this for chaining.

getFields

public LinkedHashMap<String,Boolean> getFields()

Gets fields included in the index.

Returns:

Collection of index fields.

setFields

public QueryIndex setFields(LinkedHashMap<String,Boolean> fields)

Sets fields included in the index.

Parameters:

fields - Collection of index fields.

Returns:

this for chaining.

getFieldNames

public Collection<String> getFieldNames()

Returns:

Gets a collection of field names.

setFieldNames

public QueryIndex setFieldNames(Collection<String> fields,
                                boolean asc)

Sets a collection of field names altogether with the field sorting direction. Sorting direction will be ignored for non-sorted indexes.

Parameters:

fields - Collection of fields.

asc - Ascending flag.

Returns:

this for chaining.

getIndexType

public QueryIndexType getIndexType()

Gets index type.

Returns:

Index type.

setIndexType

public QueryIndex setIndexType(QueryIndexType type)

Sets index type.

Parameters:

type - Index type.

Returns:

this for chaining.

getInlineSize

public int getInlineSize()

Gets index inline size in bytes. When enabled part of indexed value will be placed directly to index pages, thus minimizing data page accesses, thus increasing query performance.

Allowed values:

• -1 (default) - determine inline size automatically (see below)
• 0 - index inline is disabled (not recommended)
• positive value - fixed index inline

When set to -1, Ignite will try to detect inline size automatically. It will be no more than CacheConfiguration.getSqlIndexMaxInlineSize(). Index inline will be enabled for all fixed-length types, but will not be enabled for String.

Returns:

Index inline size in bytes.

setInlineSize

public QueryIndex setInlineSize(int inlineSize)

Sets index inline size in bytes. When enabled part of indexed value will be placed directly to index pages, thus minimizing data page accesses, thus increasing query performance.

Allowed values:

• -1 (default) - determine inline size automatically (see below)
• 0 - index inline is disabled (not recommended)
• positive value - fixed index inline

When set to -1, Ignite will try to detect inline size automatically. It will be no more than CacheConfiguration.getSqlIndexMaxInlineSize(). Index inline will be enabled for all fixed-length types, but will not be enabled for String.

Parameters:

inlineSize - Inline size.

Returns:

this for chaining.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object