org.apache.cassandra.cql3.restrictions

Class StatementRestrictions

java.lang.Object

org.apache.cassandra.cql3.restrictions.StatementRestrictions

public final class StatementRestrictions
extends java.lang.Object

The restrictions corresponding to the relations specified on the where-clause of CQL query.

Field Summary

Fields

Modifier and Type	Field and Description
CFMetaData	cfm The Column Family meta data

Constructor Summary

Constructors

Constructor and Description
StatementRestrictions(CFMetaData cfm, java.util.List<Relation> whereClause, VariableSpecifications boundNames, boolean selectsOnlyStaticColumns, boolean selectACollection)

Method Summary

Modifier and Type	Method and Description
boolean	areRequestedBoundsInclusive(Bound bound) Checks if the bounds (start or end) of the clustering columns are inclusive.
static StatementRestrictions	empty(CFMetaData cfm) Creates a new empty StatementRestrictions.
java.util.List<Composite>	getClusteringColumnsAsComposites(QueryOptions options) Returns the requested clustering columns as Composites.
java.util.List<java.nio.ByteBuffer>	getClusteringColumnsBounds(Bound b, QueryOptions options) Returns the bounds (start or end) of the clustering columns.
java.util.List<Composite>	getClusteringColumnsBoundsAsComposites(Bound b, QueryOptions options) Returns the bounds (start or end) of the clustering columns as Composites.
java.lang.Iterable<Function>	getFunctions()
java.util.List<IndexExpression>	getIndexExpressions(SecondaryIndexManager indexManager, QueryOptions options)
AbstractBounds<RowPosition>	getPartitionKeyBounds(QueryOptions options) Returns the partition key bounds.
java.util.Collection<java.nio.ByteBuffer>	getPartitionKeys(QueryOptions options) Returns the partition keys for which the data is requested.
boolean	hasNoClusteringColumnsRestriction() Checks if the query does not contains any restriction on the clustering columns.
boolean	isColumnRange() Checks if the query returns a range of columns.
boolean	isKeyRange() Checks if the query request a range of partition keys.
boolean	isNonCompositeSliceWithExclusiveBounds()
boolean	keyIsInRelation() Checks if the restrictions on the partition key is an IN restriction.
boolean	needFiltering() Checks if the query need to use filtering.
void	reverse()
boolean	usesSecondaryIndexing() Checks if the secondary index need to be queried.

Methods inherited from class java.lang.Object

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

Field Detail

cfm

public final CFMetaData cfm

The Column Family meta data

Constructor Detail

StatementRestrictions

public StatementRestrictions(CFMetaData cfm,
                             java.util.List<Relation> whereClause,
                             VariableSpecifications boundNames,
                             boolean selectsOnlyStaticColumns,
                             boolean selectACollection)
                      throws InvalidRequestException

Throws:

InvalidRequestException

Method Detail

empty

public static StatementRestrictions empty(CFMetaData cfm)

Creates a new empty StatementRestrictions.

Parameters:

cfm - the column family meta data

Returns:

a new empty StatementRestrictions.

getFunctions

public java.lang.Iterable<Function> getFunctions()

keyIsInRelation

public boolean keyIsInRelation()

Checks if the restrictions on the partition key is an IN restriction.

Returns:

true the restrictions on the partition key is an IN restriction, false otherwise.

isKeyRange

public boolean isKeyRange()

Checks if the query request a range of partition keys.

Returns:

true if the query request a range of partition keys, false otherwise.

usesSecondaryIndexing

public boolean usesSecondaryIndexing()

Checks if the secondary index need to be queried.

Returns:

true if the secondary index need to be queried, false otherwise.

getIndexExpressions

public java.util.List<IndexExpression> getIndexExpressions(SecondaryIndexManager indexManager,
                                                           QueryOptions options)
                                                    throws InvalidRequestException

Throws:

InvalidRequestException

getPartitionKeys

public java.util.Collection<java.nio.ByteBuffer> getPartitionKeys(QueryOptions options)
                                                           throws InvalidRequestException

Returns the partition keys for which the data is requested.

Parameters:

options - the query options

Returns:

the partition keys for which the data is requested.

Throws:

InvalidRequestException - if the partition keys cannot be retrieved

getPartitionKeyBounds

public AbstractBounds<RowPosition> getPartitionKeyBounds(QueryOptions options)
                                                  throws InvalidRequestException

Returns the partition key bounds.

Parameters:

options - the query options

Returns:

the partition key bounds

Throws:

InvalidRequestException - if the query is invalid

hasNoClusteringColumnsRestriction

public boolean hasNoClusteringColumnsRestriction()

Checks if the query does not contains any restriction on the clustering columns.

Returns:

true if the query does not contains any restriction on the clustering columns, false otherwise.

isNonCompositeSliceWithExclusiveBounds

public boolean isNonCompositeSliceWithExclusiveBounds()

getClusteringColumnsAsComposites

public java.util.List<Composite> getClusteringColumnsAsComposites(QueryOptions options)
                                                           throws InvalidRequestException

Returns the requested clustering columns as Composites.

Parameters:

options - the query options

Returns:

the requested clustering columns as Composites

Throws:

InvalidRequestException - if the query is not valid

getClusteringColumnsBoundsAsComposites

public java.util.List<Composite> getClusteringColumnsBoundsAsComposites(Bound b,
                                                                        QueryOptions options)
                                                                 throws InvalidRequestException

Returns the bounds (start or end) of the clustering columns as Composites.

Parameters:

b - the bound type

options - the query options

Returns:

the bounds (start or end) of the clustering columns as Composites

Throws:

InvalidRequestException - if the request is not valid

getClusteringColumnsBounds

public java.util.List<java.nio.ByteBuffer> getClusteringColumnsBounds(Bound b,
                                                                      QueryOptions options)
                                                               throws InvalidRequestException

Returns the bounds (start or end) of the clustering columns.

Parameters:

b - the bound type

options - the query options

Returns:

the bounds (start or end) of the clustering columns

Throws:

InvalidRequestException - if the request is not valid

areRequestedBoundsInclusive

public boolean areRequestedBoundsInclusive(Bound bound)

Checks if the bounds (start or end) of the clustering columns are inclusive.

Parameters:

bound - the bound type

Returns:

true if the bounds (start or end) of the clustering columns are inclusive, false otherwise

isColumnRange

public boolean isColumnRange()

Checks if the query returns a range of columns.

Returns:

true if the query returns a range of columns, false otherwise.

needFiltering

public boolean needFiltering()

Checks if the query need to use filtering.

Returns:

true if the query need to use filtering, false otherwise.

reverse

public void reverse()